The effects of short-term preoperative physical therapy and education on early functional recovery of patients younger than 70 undergoing total hip arthroplasty. Are Hip Precautions Necessary Post Total Hip Arthroplasty? A Systematic Review Impingement-free range of movement, acetabular component cover and early clinical results comparing 'femur-first' navigation and 'conventional' minimally invasive total hip arthroplasty: a randomised controlled trial. Does the Dual-Mobility Hip Prosthesis Produce Better Joint Kinematics During Extreme Hip Flexion Task? Influence of preoperative patient education on the risk of dislocation after primary total hip arthroplasty. The role of patient restrictions in reducing the prevalence of early dislocation following total hip arthroplasty. A randomized, prospective study. Robot‐assisted total hip arthroplasty: Clinical outcomes and complication rate Reduced patient restrictions following total hip arthroplasty: study protocol for a randomized controlled trial Preliminary application of computer-assisted patient-specific acetabular navigational template for total hip arthroplasty in adult single development dysplasia of the hip. Effect of preoperative exercise on measures of functional status in men and women undergoing total hip and knee arthroplasty. Small Increase of Actual Physical Activity 6 Months After Total Hip or Knee Arthroplasty A systematic review of psychological interventions in total hip and knee arthroplasty Antero-lateral minimal invasive (ALMI) approach for total hip arthroplasty technique and early results Preoperative progressive explosive-type resistance training is feasible and effective in patients with hip osteoarthritis scheduled for total hip arthroplasty--a randomized controlled trial. Causes for revision of dual-mobility and standard primary total hip arthroplasty Dislocation of Primary Total Hip Arthroplasty with 36 and 40-mm Femoral Heads A study of the usefulness of a periarticular multimodal drug cocktail injection for pain management after total hip arthroplasty. Hip external rotator exercise contributes to improving physical functions in the early stage after total hip arthroplasty using an anterolateral approach: a randomized controlled trial Fast-track hip and knee replacement — what are the issues? Biomechanical reconstruction of the hip: a randomised study comparing total hip resurfacing and total hip arthroplasty. The Effect of Joint Space on Midterm Outcomes After Arthroscopic Hip Surgery for Femoroacetabular Impingement Comparison of dual-mobility cup and unipolar cup for prevention of dislocation after revision total hip arthroplasty Intra- and interobserver variability of magnetic resonance imaging for quantitative assessment of abductor and external rotator muscle changes after total hip arthroplasty.
BACKGROUND / AIM Hip arthroplasty is a routine operation which relieves pain in patients with osteoarthritis . The role of physical therapy after hip arthroplasty was recognized , but the importance of preoperative physical therapy and education is still to be judged . The aim of this paper was to investigate the effect of short-term preoperative program of education and physical therapy on patients ' early functional recovery immediately after total hip arthroplasty ( THA ) . METHODS This prospect i ve study included 45 patients with hip osteoarthritis scheduled to undergo primary THA and admitted to the Department of Orthopedics of Military Medical Academy . They were r and omized into 2 groups : study and control one ( with and without preoperative education and physical therapy ) . Preoperative education was conducted through conversation ( 1 appointment with physiatrist ) and brochure . The study group was instructed to perform exercises and basic activities from the postoperative rehabilitation program ( 2 practical classes with physiotherapist ) . Effects were measured with question naires ( Harris , Oxford and Japanese Orthopaedic Association ( JOA ) hip scores ) , range of motion and visual analog scale of pain . Marks showing ability to perform basic activities and endurance were from 0 ( did not perform activity ) to 5 ( independent and secure ) . Analyses examined differences between the groups over the preoperative and immediate postoperative periods and 15 months after the operation . RESULTS There were no differences between the groups at discharge according to pain , range of motion , Harris hip score and JOA hip score . Oxford hip score did not differ between the groups 15 months after the operation . The groups started to walk at the same time , but the study group walked up and down stairs ( 3.7+/-1.66 vs 5.37+/-1.46 , p < or = 0.002 ) , used toilet ( 2.3+/-0.92 vs 3.2+/-1.24 , p < or = 0.02 ) and chair ( 2.2+/-1.01 vs 3.25+/-1.21 , p < or = 0.006 ) significantly earlier than the control group . On the third day after the operation the study group was significantly more independent than the control one while performing any basic activities ( changing position in bed from supine to side lying , from supine to sitting on the edge of the bed , from sitting to st and ing , from st and ing to lying in the bad , st and ing , walking , using toilet and chair ) . At discharge the patients from the control group still needed the therapist help for walking up and down stairs ( 3+/-1.26 ) , while the patients from the study group performed there activities independently ( 4.85+/-0.37 ) ( p < or = 0.000 ) . Endurance while walking was significantly better in the study group than in the control one . The length of hospital stay after the operation was similar for both groups , but the patients from the study group needed significantly less classes with the therapist ( 5.2+/-2.35 vs 6.85+/-1.14 , p < or = 0.02 ) during hospital stay . CONCLUSION The short-term preoperative program of education with the elements of physical therapy accelerated early functional recovery of patients ( younger than 70 ) immediately after THA and we recommend it for routine use Purpose : Total hip arthroplasty ( THA ) is a common and effective treatment of hip osteoarthritis . Activity restrictions known as hip pre caution s are widely practice d in rehabilitation post THA , aim ing to foster healing and prevent hip dislocation . The focused clinical question was : Does the application of hip pre caution s in patients post THA versus unrestricted activities significantly decrease the risk of prosthetic dislocation ? Methods : A comprehensive literature search was conducted for r and omized controlled trials or cohort studies with a comparative group and minimum 6 months follow-up , with dislocation as an end point . Retrieved titles were assessed independently by 2 review ers for inclusion and underwent st and ardized data extraction . Results : Title search produced 80 potentially relevant articles . Five articles were retrieved for data extraction of which 2 met a prior eligibility criteria . No eligible studies were found that concerned posterior approaches to hip arthroplasty , so the results of this review concern only anterolateral approaches . Neither included study showed any benefit of hip pre caution s in preventing dislocation . Conclusion : The rate of dislocation after anterolateral THA is low and is not improved by hip pre caution s. Hip pre caution s are associated with a slower return to activities , significant expense , and decreased patient satisfaction . Existing studies risk being compromised by a type II error , but a definitive study may be prohibitively large and expensive We report the kinematic and early clinical results of a patient- and observer-blinded r and omised controlled trial in which CT scans were used to compare potential impingement-free range of movement ( ROM ) and acetabular component cover between patients treated with either the navigated ' femur-first ' total hip arthroplasty ( THA ) method ( n = 66 ; male/female 29/37 , mean age 62.5 years ; 50 to 74 ) or conventional THA ( n = 69 ; male/female 35/34 , mean age 62.9 years ; 50 to 75 ) . The Hip Osteoarthritis Outcome Score , the Harris hip score , the Euro-Qol-5D and the Mancuso THA patient expectations score were assessed at six weeks , six months and one year after surgery . A total of 48 of the patients ( 84 % ) in the navigated ' femur-first ' group and 43 ( 65 % ) in the conventional group reached all the desirable potential ROM boundaries without prosthetic impingement for activities of daily living ( ADL ) in flexion , extension , abduction , adduction and rotation ( p = 0.016 ) . Acetabular component cover and surface contact with the host bone were > 87 % in both groups . There was a significant difference between the navigated and the conventional groups ' Harris hip scores six weeks after surgery ( p = 0.010 ) . There were no significant differences with respect to any clinical outcome at six months and one year of follow-up . The navigated ' femur-first ' technique improves the potential ROM for ADL without prosthetic impingement , although there was no observed clinical difference between the two treatment groups BACKGROUND  Total hip arthroplasty ( THA )  using dual-mobility ( DM ) design permits larger hip range of motion . However , it is unclear how it benefits the patients during activities of daily living . The purpose was to compare kinematic variables of the operated limb between  THA patients using either DM or single-bearing ( SB ) implants during a squat task . METHODS Twenty-four THA patients were r and omly assigned to either a DM or SB implant and matched to 12 healthy controls ( CTRLs ) . They underwent 3-dimensional squat motion analysis  before and 9 months after surgery . Sagittal and frontal plane angles of the pelvis and the hip were analyzed using statistical parametric mapping . Paired analyses compared presurgery and postsurgery squat depth . RESULTS Peak sagittal pelvis angle of DM was closer to normal compared with that of SB . Both implant groups had similar hip angle patterns and magnitude but significantly lower than the CTRLs . SB reached a much large hip abduction compared with the other groups . Both surgical groups had significantly worst squat depth than the CTRLs . CONCLUSION Neither THA implant groups were able to return pelvis and hip kinematics to the level of CTRLs . The deficit of DM implants at the pelvis combined with the poorer functional scores should caution clinicians to use this implant design in active patients . SB design causes a larger hip abduction to reach their maximum squat depth . Post-THA rehabilitation should focus on improving joint range of motion and strength OBJECTIVE Dislocation is a well-known complication after  total hip arthroplasty ( THA ) , and is the second-highest cause of revision surgery . Our objective was to assess the effect of preoperative patient education on the occurrence of  hip dislocation  within 6 months after primary THA . METHODS Between 1998 and 2007 , we conducted a prospect i ve cohort study at the Geneva University Hospital Department of Orthopaedic Surgery , including all primary THAs performed via an anterolateral transgluteal approach with the use of a 28-mm diameter head .  The preoperative education session was introduced in June 2002 and included advice on muscle strengthening exercises and postoperative restrictions of range of motion as a means of preventing dislocation . The main outcome was the incidence of dislocation within 6 months of surgery . RESULTS A total of 597 patients who underwent 656 THAs between June 2002 and June 2007 participated in the education session , whereas 1,641 patients who underwent 1,945 procedures did not . Forty-six dislocations occurred over the study period , 5 ( 0.8 % ) in participants and 41 ( 2.1 % ) in non participants ( absolute risk reduction 1.3 % ; 95 % confidence interval [ 95 % CI ] 0.4 , 2.3 ) , with the time interval between surgery and dislocation being significantly shorter among participants ( 0.2 versus 1.2 months ) . Non participants had a 2.8 times higher risk of dislocation than participants ( unadjusted odds ratio [ OR ] 2.80 ; 95 % CI 1.10 , 7.13 ) . Adjustment for age , sex , comorbidities , and prior surgery did not change the results ( adjusted OR 2.79 ; 95 % CI 1.09 , 7.15 ) . CONCLUSION Our findings suggest that participation in a preoperative patient education session may reduce the risk of dislocation within 6 months after THA BACKGROUND It is currently unknown whether functional restrictions following total hip arthroplasty can reduce the prevalence of early postoperative dislocation . Our hypothesis was that dislocation was more likely to occur in patients who were not placed on these restrictions . METHODS We performed a prospect i ve , r and omized study to evaluate the role of postoperative functional restrictions on the prevalence of dislocation following uncemented total hip arthroplasty through an anterolateral approach . Of the 630 eligible consecutive patients , 265 patients ( 303 hips ) consented to be r and omized into one of two groups ( the " restricted " group or the " unrestricted " group ) . The patients in both groups were asked to limit the range of motion of the hip to < 90 degrees of flexion and 45 degrees of external and internal rotation and to avoid adduction for the first six weeks after the procedure . The patients in the restricted group were instructed to comply with additional hip pre caution s during the first six weeks postoperatively . Specifically , these patients were managed with the placement of an abduction pillow in the operating room before bed transfer and used pillows to maintain abduction while in bed ; used elevated toilet seats and elevated chairs in the hospital , in the rehabilitation facility , and at home ; and were prevented from sleeping on the side , from driving , and from being a passenger in an automobile . All patients were followed for a minimum of six months postoperatively . RESULTS There was one dislocation in the entire cohort ( prevalence , 0.33 % ) . This dislocation occurred in a patient in the restricted group during transfer from the operating table to a bed with an abduction pillow in place . Patients in the unrestricted group were found to return to side-sleeping sooner ( p < 0.001 ) , to ride in automobiles more often ( p < 0.026 ) , to drive automobiles more often ( p < 0.001 ) , to return to work sooner ( p < 0.001 ) , and to have a higher level of satisfaction with the pace of their recovery ( p < 0.001 ) than those in the restricted group . There was an additional expenditure of approximately $ 655 per patient in the restricted group . CONCLUSIONS Total hip arthroplasty through an anterolateral approach is likely to be associated with a low dislocation rate . Removal of several restrictions did not increase the prevalence of dislocation  following primary hip arthroplasty at our institution . However , it did promote substantially lower costs and was associated with a higher level of patient satisfaction as patients achieved a faster return to daily functions in the early postoperative period BACKGROUND The purpose of this study was to report minimum 2-year outcomes and complications for robotic-arm-assisted total hip arthroplasty ( THA )  . METHODS Data were prospect ively collected and retrospectively review ed between June 2011 and April 2014 . Inclusion criteria were primary robotic-arm-assisted THAs treating idiopathic osteoarthritis with ≥ 2-year follow-up .  Demographics , operating time , complications , 2-year outcome scores and satisfaction , and subsequent surgeries were recorded . RESULTS There were 181 cases eligible for inclusion , of which 162 ( 89.5 % ) had minimum 2-year follow-up . At the latest follow-up , the mean visual analogue scale was 0.7 , satisfaction was 9.3 , Harris hip score was 91.1 and forgotten joint score was 83.1 . Six ( 3.7 % ) intraoperative complications and six ( 3.7 % ) postoperative complications were reported . No leg length discrepancies ( LLDs ) or dislocations were reported . CONCLUSIONS Robotic-arm-assisted THA demonstrates favourable short-term outcomes and does not result in a higher complication rate compared to non-robotic THA as reported by the literature Background Total hip arthroplasty ( THA ) is a very common procedure in orthopedic surgery . In the Netherl and s , 25,642 primary THAs were performed in 2013 . Postoperative hip dislocation is one of the major complications and has been reported in 0.5 to 10.6 % of patients after primary THA.Several reports regarding the use of an anterolateral surgical approach have shown that a non-restriction or reduced restriction protocol does not increase the dislocation rate . For the posterolateral surgical approach it has been suggested that patient restrictions might be unnecessary but the amount of available literature is scarce . As such , r and omized controlled trials aim ed at investigating restrictions following THA using a posterior approach are strongly recommended . The aim of this prospect i ve r and omized controlled trial is to investigate the non-inferiority hypothesis concerning the early dislocation rate after THA in patients with and without the use of a reduced restriction protocol . Methods / Design After providing informed consent a group of 456 patients with symptomatic coxarthrosis will be r and omized to receive a THA either with care as usual , i.e. receiving postoperative restrictions including the advice to sleep in a supine position for the first 8 weeks postoperatively , or reduced restrictions with no recommendations regarding the position during sleeping . Primary outcome measure will be the percentage of early dislocations within the first 8 weeks after THA . Secondary outcome measures will be patient satisfaction , time to functional recovery , quality of sleep and patient ’s self-reported compliance with postoperative instructions . Discussion To our knowledge this will be the first r and omized controlled trial that compares a reduced restriction protocol with a restricted protocol following THA using a posterolateral surgical approach . Our hypothesis is that a reduced restriction protocol following THA with use of a posterolateral surgical approach has no influence on the early dislocation rate compared to a restricted protocol . Instead , embracing a reduced restriction protocol might even contribute to a higher quality of sleep , thereby facilitating a faster uptake and return to daily functions in patients after THA.Trial registration Clinical Trials.gov NCT02107248 , registration date 3 April 2014 BACKGROUND The considerable variation in anatomical abnormalities of hip joints associated with different types of developmental dysplasia of hip ( DDH ) makes reconstruction in total hip arthroplasty ( THA ) difficult . It is desirable to create patient-specific design s for THA procedures . In the cases of adult single DDH , an accuracy-improved method has been developed for acetabular cup prosthesis implantation of hip arthroplasty . METHODS From October 2007 to November 2008 , 22 patients with single DDH ( according to the Crowe st and ard , all dysplasia hips were classified as type I ) were scanned with spiral CT pre-operatively . These patients scheduled for THA were r and omly assigned to undergo either conventional THA ( control group , n = 11 ) or navigation template implantation ( NT group , n = 11 ) . In the NT group , three-dimensional ( 3D ) CT pelvis image data were transferred to a computer workstation and 3D models of the hip were reconstructed using the Mimics software . The 3D models were then processed by the Imageware software . In brief , a template that best fitted the location and shape of the acetabular cup was ' reversely ' built from the 3D model , the rotation centre of the pathological hip determined by mirroring that of the healthy site , and a guiding hole in the template was then design ed . The navigational templates were manufactured using a rapid prototyping machine . These navigation templates guide acetabular component placement . RESULTS Based on the predetermined abduction angle 45 ° and anteversion angle 18 ° , after 1 year follow-up , the NT group showed significantly smaller differences ( 1.6 ° ± 0.4 ° , 1.9 ° ± 1.1 ° ) from the predetermined angles than those in the control group ( 5.8 ° ± 2.9 ° , 3.9 ° ± 2.5 ° ) ( P < 0.05 ) . CONCLUSIONS The template design s facilitated accurate placement of acetabular components in dysplasia of acetabulum . The hip 's center of rotation in DDH could be established using computer-aided design , which provides a useful method for the accurate location of prosthesis with a low cost-performance ratio without excessive technical workload on the surgical team OBJECTIVE To evaluate the effect of a short preoperative exercise intervention on the functional status , pain , and muscle strength of patients before and after total joint arthroplasty . METHODS A total of 108 men and women scheduled for total hip arthroplasty ( THA ) or total knee arthroplasty ( TKA ) were r and omized to a 6-week exercise or education ( control ) intervention immediately prior to surgery . We assessed outcomes through question naires and performance measures . Analyses examined differences between groups over the preoperative and immediate postoperative periods and at 8 and 26 weeks postsurgery . RESULTS Among THA patients , the exercise intervention was associated with improvements in preoperative Western Ontario and McMaster Universities Osteoarthritis Index function score ( improvement of 2.2 in exercisers versus decline of 3.9 in controls ; P = 0.02 ) and Short Form 36 physical function score ( decline of 0.4 in exercisers versus decline of 14.3 in controls ; P = 0.003 ) . No significant differences were seen in TKA patients . Exercise participation increased muscle strength preoperatively ( 18 % in THA patients and 20 % in TKA patients ) , whereas the control patients had essentially no change in strength ( P > 0.05 for exercise versus education in both THA and TKA groups ) . Exercise participation prior to total joint arthroplasty substantially reduced the risk of discharge to a rehabilitation facility in THA and TKA patients ( adjusted odds ratio 0.27 , 95 % confidence interval 0.074 - 0.998 ) . The intervention had no effects on outcomes 8 and 26 weeks postoperatively . CONCLUSION A 6-week presurgical exercise program can safely improve preoperative functional status and muscle strength levels in persons undergoing THA . Additionally , exercise participation prior to total joint arthroplasty dramatically reduces the odds of inpatient rehabilitation Abstract Limitation in daily physical activity is one of the reasons for total hip arthroplasty ( THA ) or total knee arthroplasty ( TKA ) . However , studies of the effects of THA or TKA generally do not determine actual daily activity as part of physical functioning . We determined the effect of THA or TKA on patients ’ actual physical activity and body function ( pain , stiffness ) , capacity to perform tasks , and self-reported physical functioning . We also assessed whether there are differences in the effect of the surgery between patients undergoing THA or TKA  and whether the improvements vary between these different outcome measures . We recruited patients with long-st and ing end-stage osteoarthritis of the hip or knee awaiting THA or TKA .  Measurements were performed before surgery and 3 and 6 months after surgery . Actual physical activity improved by 0.7 % . Patients ’ body function , capacity , and self-reported physical functioning also improved . The effects of the surgery on these aspects of physical functioning were similar for THA and TKA . The effect on actual physical activity ( 8 % ) was smaller than on body function ( 80%–167 % ) , capacity ( 19%–36 % ) , and self-reported physical functioning ( 87%–112 % ) . Therefore , in contrast to the large effect on pain and stiffness , patients ’ capacity , and their self-reported physical functioning , the improvement in actual physical activity of our patients was less than expected 6 months after surgery . Level of Evidence : Level I , prospect i ve study . See the Guidelines for Authors for a complete description of levels of evidence Background The current practice in elective orthopaedics does not routinely include psychological interventions despite evidence that psychological factors such as personality , anxiety , depression and negative thinking styles can influence outcomes and recovery from surgery . The objective of this paper was to review the effectiveness of psychological interventions used in conjunction with total hip ( THA ) and knee arthroplasty ( TKA ) , in improving patient reported joint outcomes . Methods An extensive literature search was conducted according to Preferred Reporting Items for Systematic review s and Meta-Analyses guidelines . Search terms included psychology , interventions , and orthopaedics . Articles were included if they were r and omised controlled trials ( RCTs ) of psychological interventions involving active patient participation measured with patient reported joint outcomes in patients undergoing hip or knee arthroplasty . Results A total of 19,489 titles were screened . Seven studies met the inclusion criteria and were included . Five of seven studies did not show improvements in patient reported outcomes after surgery . Specifically , psycho-education alone was not effective at improving patient reported joint outcomes in two out of two studies . Conclusion The current literature does not support routine psychological interventions for TKA and THA . However , it should be noted that the literature for psychological interventions in conjunction with TKA and THA is still in its infancy . This gap in the literature is surprising , considering the importance of the role of psychological factors in recovery . Further RCTs with long term follow ups , multidisciplinary involvement , and more comprehensive and focused interventions that go beyond educating patients are needed . Future studies should account for the dem and effect , include measures of psychological variables to determine whether psychological interventions are more beneficial for some patients compared to others , and compare the different modes of delivery and timing of interventions to determine the optimal nature and duration of psychological interventions for TKA and THA Introduction : Minimally invasive surgery represents one of the most recent techniques to have emerged within THA . In conventional THA , the incision typically measures 15–20 cm . Minimal invasive approach defined as less invasive to the skin , muscles , or bone may reduce complications and improve recovery time . A number of different approaches and methods have been described in literature . Purpose : This is a prospect i ve study describing the technique and early results of the modified antero-lateral minimal invasive ( ALMI ) approach and comparing our results to the results of other investigators interested in minimal invasive THA . Material s and methods : Seventy-five consecutive primary total hip arthroplasties ( cemented and cementless ) were done through a modified ALMI approach ( 6–8 cm ) , in which we kept the hip abductors intact . Neither special instruments nor specially design ed prostheses were needed . Minimum follow-up was 12 months . Results : The mean Harris hip score for patients after 12-month follow-up was 90 while the mean Merle d’Abugine mean score was 16.5 . Both scores reached almost the maximum values within 3 months after surgery . The cup abduction angle for 70 % patients was between 35 ° and 45 ° . No femoral stem mal-alignment was recorded . The mean operative time of cemented prosthesis was 65 min while that of the cementless prosthesis was 55 min . No wound complications or dislocations were recorded . All the patients were allowed to weight bear in the second post-operative day and involved in an early rehabilitation program . Conclusion : ALMI hip approach with sparing of hip abductors is safe and gives excellent orientation for positioning of prosthesis components . It also allows early and smooth post-operative rehabilitation with fast recovery of the patient in terms of weight bearing OBJECTIVE To investigate the efficacy and feasibility of progressive explosive-type resistance training ( RT ) in patients with osteoarthritis ( OA ) of the hip scheduled for total hip arthroplasty ( THA ) . METHOD R and omized controlled trial ( 1:1 ) in patients diagnosed with hip OA and scheduled for THA . The intervention group ( IG ) performed supervised preoperative progressive explosive-type RT twice a week for 10 weeks ; four exercises ( hip/thigh ) performed in three series each ( 8 - 12 repetition maximum ) . The control group ( CG ) received ' care as usual ' .  Efficacy was reported as the between-group difference in the Hip Osteoarthritis Outcome Score ( HOOS ) ( primary endpoint ; ADL function ) , and leg muscle power at post intervention follow-up immediate before surgery . Intention-to-treat analyses were performed in a multilevel regression model adjusting for baseline , sex , age and weight . Feasibility was reported as adherence , exercise related pain and adverse effects . Post-surgical follow up will be reported separately . Clinical Trials.gov registration : NCT01164111 . RESULTS Eighty patients ( age 70.4 ± 7.6 years , BMI 27.8 ± 4.6 , 52 females ( 65 % ) were included .  Adherence was high ( 93 % ) with acceptable exercise related pain ( VAS score ≤ 5 ) reported in 83 % of sessions and no adverse events . Changes in HOOS ' function ' was 10.0 points 95%CI [ 4.7 ; 15.3 ] higher in IG compared to CG ( P < 0.001 ) . For all the remaining HOOS subscales IG scored significantly better ( P < 0.03 ) and had higher leg extension muscle power ( P < 0.0001 ) compared to CG . CONCLUSION Progressive explosive-type RT was feasible in the included group of hip OA patients scheduled for THA and result ed in significant improvement in self-reported outcomes and increased leg muscle power Introduction The causes for revision of primary total hip arthroplasty ( THA ) are various and quite well known . The developing use of dual-mobility THA ( DM-THA ) seems a relevant option to decrease the risk of instability . Due to lack of long-term follow-up , this innovative retentive concept is suspected to increase the risk of polyethylene ( PE ) wear . the aim of the study was to analyse the causes for  DM-THA revision and assess whether or not its occurrence is different from that of fixed-st and ard ( FS ) THA , particularly for aseptic loosening or wear and /or osteolysis . Material s and methods The SoFCOT group conducted an observational prospect i ve multicentre study from 1 January 2010 to 31 December 2011 . Inclusion criteria comprised an exhaustive collection of 2044 first-revision THAs with 251 DM-THAs and 1793 FS-THAs . After excluding complications linked to patient factors ( infection and periprosthetic fractures ) , we performed a matched case – control study ( matching ratio 1:1 ) comparing two groups of 133 THAs . Results Revisions for aseptic loosening or osteolysis/wear were as frequent in DM-THA ( 58.7 % ) as in FS-THA ( 57.1 % ) ( p 0.32 ) ; 7.5 % of DM-THA were revised for dislocation versus 19.5 % of FS-THA ( p 0.007 ) . Discussion Revision for osteolysis/wear and aseptic loosening were as frequent in DM-THA as in FS-THA ;  revision for dislocation was less frequent in DM-THA . This confirms the efficiency of the DM concept regarding the risk of dislocation . Causes for revision were different between groups , and revisions for dislocation were less frequent in DM-THA . Only prospect i ve comparative studies could provide reliable information that may support broader use of the DM concept Some authors suggest the use of larger ( 36 and 40 mm ) femoral heads against highly cross-linked polyethylene acetabular liners will reduce the prevalence of early dislocation after primary total hip arthroplasty ( THA ) . We prospect ively followed 61 consecutive patients at high risk for dislocation to determine the prevalence of early dislocation after primary THA with 36 and 40 mm femoral heads .  We established specific indications for the use of these larger heads in primary arthroplasty . There were 65 hips in 61 patients with a minimum followup of 1 year ( mean 2 years , range 1 - 4 years ) . There were 55 36 mm heads and 10 40 mm heads . All arthroplasties were performed by the posterior approach with capsular repair . The prevalence of early dislocation was 4.6 % ( 3 of 65 ) . There was one patient with an anterior dislocation and two with posterior dislocation . No patient underwent reoperation for dislocation . There was no dislocation in the 10 hips that had a 40 mm head . We identified no complications related to the larger femoral heads . The use of larger femoral heads did not notably reduce the prevalence of early dislocation after primary THA in high risk patients compared to historical controls . Therapeutic study : Level IV , case series . See Guidelines for Authors for a complete description of levels of evidence BACKGROUND Measures for pain management after total hip arthroplasty ( THA ) are important for early improvement in the quality of life after operation and early postoperative rehabilitation . We investigated the analgesic effect of locally injected drugs around the total hip prosthesis . METHODS 54 patients undergoing THA were r and omized either to receive a periarticular intraoperative injection of a 30-ml mixture containing morphine hydrochloride 10 mg , 0.5 % bupivacaine 20 ml , epinephrine 0.3 mg , and saline 8.7 ml or to receive no injection . The perioperative analgesic regimen was st and ardized . The evaluation items included assessment of pain using a 100-point visual analog scale ( VAS ) after the patients awoke on the day of the operation and on postoperative day 1 , the dose of diclofenac sodium suppository  , the number of days for acquiring assisted ambulation with a walking cane , and side effects . RESULTS The VAS score on the day of the operation was significantly low in the injection group . No cardiac or central nervous system toxicity was observed . CONCLUSIONS Intraoperative periarticular injection with multimodal drugs can significantly reduce pain on the day of the operation , with no apparent risks , following THA Abstract Purpose : The purpose of this study was to investigate the effects of an exercise program focusing on hip external rotator muscle on physical recovery in the early post-operative period of total hip arthroplasty ( THA ) . Methods : Patients who underwent THA were r and omized to an exercise group ( n = 14 ) or a control group ( n = 14 ) . In exercise group , the hip external rotator exercise program was performed 5 times per week for four weeks . Outcome measures were hip pain , hip range of motion , muscle strength of lower extremity and Timed Up and Go ( TUG ) test . Results : Both the hip abductor strength ( effect size = 0.60 ) and TUG test ( effect size= −0.53 ) in the exercise group improved significantly after the intervention . Conclusions : The results of the present study demonstrated that exercise program focusing on hip external rotator muscle was an effective intervention , especially in improving both hip abductor strength and walking ability in the acute post-THA stage . Implication for Rehabilitation After THA , in order to safely progress patients back to their desired activity level , there is a need to develop rehabilitation strategies to expedite and promote the recovery during the acute postoperative period . Exercise program focusing on hip external rotator muscle may lead to significant improvement of hip abductor muscle strength and gait ability in the acute post-THA stage Surgical injury is followed by pain , stress-induced catabolism , impairment of organ function , and a risk of thromboembolism and impaired cognitive function . These events may contribute to complications , a need for prolonged hospitalization , postoperative fatigue , delayed convalescence , and the need for rehabilitation . Optimization of the individual care components in perioperative care ( the fast-track methodology ) reduces the need for hospitalization , morbidity , and prolonged convalescence , with subsequent economic savings ( Kehlet and Wilmore 2008 ) . Correspondingly , improvement in perioperative care has led to a reduced stay in hospital after total hip arthroplasty ( THA ) and total knee arthroplasty ( TKA ) , which is now only about 3 days in many centers . The main question that remains to be answered is whether further improvement can be made and whether these operations can be performed on an ambulatory or semi-ambulatory basis without any increased risk of morbidity or cardiopulmonary and thromboembolic complications , long-term cognitive dysfunction , pain , and need for rehabilitation . Thus , a multidisciplinary collaboration has been established in 5 dedicated public Danish hospitals with established fast-track THA and TKA in order to optimize perioperative care to require only 1–2 days of hospitalization with no increase in post-discharge pain , morbidity , and rehabilitation requirements ( Figure ) . To this end , we concentrated on  perioperative pain management , optimization of transfusion strategies , strategies for postoperative rehabilitation , requirements for postoperative thromboembolic prophylaxis , and safety aspects ( re-admissions , hip dislocation , and knee stiffness ) . Effective postoperative pain relief is a prerequisite for a successful fast-track recovery . Although continuous peripheral nerve blocks are currently the most effective analgesic techniques ( Ilfeld et al. 2008a , b ) , they are dem and ing in terms of expertise and there is a risk of muscle paralysis . Efforts have therefore been made recently to improve local wound infiltration and infusion techniques . Although promising , more research is required to better define these techniques regarding dose-volume relationships , placement and types of catheters , duration , and safety aspects ( Rostlund and Kehlet 2007 ) . There will be more focus on post-discharge pain , which remains a problem in many patients . Furthermore , research will concentrate on mechanisms and predictors of the large inter-individual variability in the degree of postoperative pain , which may be related to the inflammatory response and genes associated with pain . Such knowledge should facilitate pain management , leading to differential use of analgesic principles in low pain responders and high-pain responders . Blood transfusion is indicated when a patient 's limit concerning — or physiological adaptation to — progressive normovolemic anemia is reached , but there are no specific data from THA and TKA . Data from hip fracture surgery have shown that postoperative anemia impedes functional mobility and that a liberal transfusion strategy reduces morbidity ( Foss et al. 2009 ) . Since modern blood transfusion is safer than before , large r and omized studies with high and low transfusion thresholds will be performed in cardiovascular high-risk patients after THA , with morbidity and functional recovery as primary outcome measures . Postoperative rehabilitation after THA and TKA has been st and ard despite the fact that there has been little evidence on the optimal type of physiotherapy , when it should be started , and for how long ( Minns Lowe et al. 2007 , 2009 ) . Previous r and omized studies have been inconclusive and they were based on relatively long-term hospitalization ( 7–12 days ) ; they are therefore not applicable to fast-track THA and TKA . Over the last decade , many industry-sponsored trials have documented the need for prolonged thromboembolic prophylaxis ( 10–30 days ) , mostly based on surrogate outcomes and with relatively small effects on clinical manifestations of thromboembolism ( Geerts et al. 2008 ) . A common characteristic of these studies has been a relatively long hospital stay ( 6–12 days or more ) . Since postoperative immobilization is a well-known risk factor for postoperative thromboembolism , the need for prolonged thromboembolic prophylaxis after implementation of fast-track surgery with early mobilization might be question ed . The fast-track group will therefore focus on a large ( n = 5,000 ) prospect i ve , detailed 90-day follow-up study with prophylaxis only until discharge ( 1–3 days ) . It is well-documented that cognitive function declines after THA and TKA in elderly patients ( Maze et al. 2008 ) . A fast-track setup may reduce cognitive dysfunction due to less postoperative sleep disturbances , less pain , and less opioid requirements , all of which may impair cognitive function . Finally , in the fast-track THA and TKA setting , safety aspects will be assessed regarding the risk of hip dislocation , and knee stiffness after TKA . In summary , despite major improvements in care and short-term outcome after THA and TKA , several issues remain to be answered in order to optimize fast-track treatment We have compared the biomechanical nature of the reconstruction of the hip in conventional total hip arthroplasty ( THA ) and surface replacement arthroplasty ( SRA ) in a r and omised study involving 120 patients undergoing unilateral primary hip replacement . The contralateral hip was used as a control . Post-operatively , the femoral offset was significantly increased with THA ( mean 5.1 mm ; -2.8 to 11.6 ) and decreased with SRA ( mean -3.3 mm ; -8.9 to 8.2 ) . Femoral offset was restored within sd 4 mm in 14 ( 25 % ) of those with THA and in 28 ( 57 % ) of the patients receiving SRA ( p < 0.001 ) . In the THA group , the leg was lengthened by a mean of 2.6 mm ( -6.04 to + 12.9 ) , whereas it was shortened by a mean of 1.9 mm ( -7.1 to + 2.05 ) in the SRA group , compared with the contralateral side . Leg-length ine quality was restored within sd 4 mm in 42 ( 86 % ) of the SRA and 33 ( 60 % ) of the THA patients . The radiological parameters of acetabular reconstruction were similar in both groups . Restoration of the normal proximal femoral anatomy was more precise with SRA . The enhanced stability afforded by the use of a large-diameter femoral head avoided over-lengthening of the limb or increased offset to improve soft-tissue tension as occurs sometimes in THA . In a subgroup of patients with significant pre-operative deformity , restoration of the normal hip anatomy with lower pre-operative femoral offset or significant shortening of the leg was still possible with SRA Background : Excellent short-term results have been reported after  hip arthroscopic surgery to address femoroacetabular impingement ( FAI ) . Purpose /Hypothesis : The purpose of this study was to determine if patients with narrow joint spaces had inferior outcomes at a postoperative minimum of 5 years and if they had a higher conversion rate to total hip arthroplasty ( THA ) . The hypothesis was that patients with ≤2-mm joint spaces would report inferior outcomes and that patients with > 2-mm joint spaces would have improved survivorship ( no conversion to THA ) . Study Design : Cohort study ; Level of evidence , 3 . Methods : Between March 2005 and January 2008 , prospect ively collected data were analyzed for patients older than 18 years of age undergoing hip arthroscopic surgery for FAI . Radiographic measurements of joint space were collected , and hips were grouped as having preserved ( > 2 mm ) or limited ( ≤2 mm ) joint space . Outcome measures included the Western Ontario and McMaster Universities Arthritis Index ( WOMAC ) , modified Harris Hip Score ( MHHS ) , Hip Outcome Score ( HOS ) for activities of daily living and sports , and Short Form–12 ( SF-12 ) . Results : There were 559 patients included , 466 ( 83 % ) of whom were contacted . Fifty-four patients with limited joint spaces ( 86 % ) converted to THA , while only 63 patients with preserved joint spaces ( 16 % ) converted to THA . The mean survival time for patients with preserved joint spaces was 88 months ( 95 % CI , 85 - 91 months ) , and the mean survival time for patients with limited joint spaces was 40.0 months ( 95 % CI , 33.7 - 46.3 months ) ( P = .0001 ) . Complete follow-up outcome data were available on 323 patients , none of whom had THA , with a mean follow-up of 73 months . The mean postoperative HOS for activities of daily living and sports were significantly better in patients with preserved joint spaces ( 82 vs 62 [ P = .012 ] and 77 vs 47 [ P = .003 ] , respectively ) compared with those with limited joint spaces at a mean of 73 months postoperatively ( range , 60 - 97 months ) . Conclusion : Hip arthroscopic surgery for FAI result ed in significantly better outcomes and activity levels at minimum 5-year follow-up in patients with preserved joint spaces . Hips with limited joint spaces converted to THA earlier than did those with preserved joint spaces Background and purpose — Revision total hip arthroplasty ( THA ) is associated with higher dislocation rates than primary THA . We compared the risk of dislocation within 6 months and all-cause re-revision during the whole study period using either the dual-mobility cup or the unipolar cup . Methods — We used a prospect i ve hospital registry-based cohort including all total and cup-only revision THAs performed between 2003 and 2013 . The cups used were either dual-mobility or unipolar ; the choice was made according to the preference of the surgeon . 316 revision THAs were included . The mean age of the cohort was 69 ( 25–98 ) years and 160 THAs ( 51 % ) were performed in women . The dual-mobility group ( group 1 ) included 150 THAs ( 48 % ) and the mean length of follow-up was 31 ( 0–128 ) months . The unipolar group ( group 2 ) included 166 THAs ( 53 % ) and the mean length of follow-up was 52 ( 0–136 ) months . Results — The incidence of dislocation within 6 months was significantly lower with the dual-mobility cup than with the unipolar cup ( 2.7 % vs. 7.8 % ) . The unadjusted risk ratio ( RR ) was 0.34 ( 95 % CI : 0.11–1.02 ) and the adjusted RR was 0.28 ( 95 % CI : 0.09–0.87 ) . The number of patients needed to treat with a  dual-mobility cup in order to prevent 1 case of dislocation was 19 . The unadjusted incidence rate ratio for all-cause re-revision in the dual-mobility group compared to the unipolar group was 0.6 ( 95 % CI : 0.3–1.4 ) . Interpretation — Use of a dual-mobility rather than a unipolar cup in revision THA reduced the risk of dislocation within 6 months PURPOSE Magnetic resonance imaging ( MRI ) is one of the most widely used noninvasive diagnostic modalities for musculoskeletal evaluation . We conducted a retrospective study to determine whether MRI of the hip joint abductor and external rotator muscles yields reproducible findings in patients after total hip arthroplasty ( THA ) . MATERIAL S AND METHODS MR images were obtained 12 months after  THA in 10 patients and were analyzed by two independent , blinded observers . The images were analyzed on workstations with three-dimensional analysis capabilities . The readers evaluated the gluteus medius , gluteus minimus , and obturator externus muscles on the nonoperated side ( NOS ) and the THA side . For each of the three muscles , the readers analyzed the cross-sectional area , cross-sectional signal intensity , intensity in a region of interest ( ROI ) , and volume on both sides . RESULTS Unlike intraobserver variability , interobserver variability showed significant differences between the measurements for some abductor and external rotator muscles , especially for volume ( p<0.001 - 0.02 ) and cross-sectional area ( p<0.001 - 0.05 ) analysis of the gluteus medius and minimus muscles on the THA side but also on the NOS . There were no differences in signal intensity in the ROI ( p=0.29 - 0.83 ) . The coefficients of variation ( CoV ) of all 4 parameters quantified were lower on the NOS ( average , 5.9 % ) than on the THA side ( average , 7.3 % ) . Analysis of the gluteus minimus muscle volume showed both higher intraobserver ( 18.8 % ) and interobserver ( 13.9 % ) variability on the THA side . CONCLUSION MRI is an accurate and reliable test for evaluation of soft tissue structures in patients who have undergone THA .  MRI evaluation of abductor muscles yields reproducible results on the THA side and on the NOS . Prosthesis artifacts limit evaluation of the gluteus minimus muscle on the THA side and can not be recommended . Since interobserver variability was always higher than intraobserver variability , follow-up examinations should ideally be performed by the same reader in order to obtain clinical ly meaningful results
AUTHORS ' CONCLUSIONS Very low quality evidence is available from single trials , thus we are uncertain if hip pre caution s with or without the addition of equipment and functional restrictions are effective in preventing dislocation and improving outcomes after THA .
BACKGROUND Total hip arthroplasty ( THA ) is one of the most common orthopaedic operations performed worldwide .
Painful osteoarthritis of the hip is the primary indication for THA .
Following THA , people have conventionally been provided with equipment , such as raised toilet seats and chairs , and educated to avoid activities that could cause the hip joint to be in a position of flexion over 90 degrees , or adduction or rotation past the midline .
These aspects of occupational therapy have been advocated to reduce the risks of prosthesis dislocation .
However , the appropriateness of these recommendations has been question ed .
OBJECTIVES To assess the effects of provision of assistive devices , education on hip pre caution s , environmental modifications and training in activities of daily living ( ADL ) and extended ADL ( EADL ) for people undergoing THA .