bluuebunny/crossref_metadata_2025 huggingface dataset:
EARLY BISPHOSPHONATE THERAPY POST PROXIMAL FEMORAL FIXATION DOES NOT IMPACT FRACTURE HEALING
Authors: Tong Y.Y.F. , Holmes S. , Sefton A.
Published: February 2023

There is conjecture on the optimal timing to administer bisphosphonate therapy following operative fixation of low- trauma hip fractures. Factors include recommendations for early opportunistic commencement of osteoporosis treatment, and clinician concern regarding the effect of bisphosphonates on fracture healing. We performed a systematic review and meta-analysis to determine if early administration of bisphosphonate therapy within the first month post-operatively following proximal femur fracture fixation is associated with delay in fracture healing or rates of delayed or non-union.

We included randomised controlled trials examining fracture healing and union rates in adults with proximal femoral fractures undergoing osteosynthesis fixation methods and administered bisphosphonates within one month of operation with a control group. Data was pooled in meta-analyses where possible. The Cochrane Risk of Bias Tool and the GRADE approach were used to assess validity.

For the outcome of time to fracture union, meta-analysis of three studies (n= 233) found evidence for earlier average time to union for patients receiving early bisphosphonate intervention (MD = −1.06 weeks, 95% CI −2.01 – −0.12, I2= 8%). There was no evidence from two included studies comprising 718 patients of any difference in rates of delayed union (RR 0.61, 95% CI 0.25–1.46). Meta-analyses did not demonstrate a difference in outcomes of mortality, function, or pain.

We provide low-level evidence that there is no reduction in time to healing or delay in bony union for patients receiving bisphosphonates within one month of proximal femur fixation.
PROXIMAL HUMERUS FRACTURE DISLOCATIONS: OUTCOMES OF MANAGEMENT
Authors: Cosic F , Kirzner N , Edwards E , Page R , Kimmel L , Gabbe B
Published: February 2023

Proximal humerus fracture dislocations are amongst the most severe proximal humerus injuries, presenting a challenging management problem. The aim of this study was to report on the long-term outcomes of the management of proximal humerus fracture dislocations.

Patients with a proximal humerus fracture dislocation managed at a Level 1 trauma centre from January 2010 to December 2018 were included. Patients with an isolated tuberosity fracture dislocation or a pathological fracture were excluded. Outcome measures were the Oxford Shoulder Score (OSS), EQ-5D-5L, return to work, and radiological outcomes. Complications recorded included further surgery, loss of position/fixation, non-union/malunion, and avascular necrosis.

A total of 69 patients were included with a proximal humerus fracture dislocation in the study period; 48 underwent surgical management and 21 were managed with closed reduction alone. The mean (SD) age of the cohort was 59.7 (±20.4), and 54% were male. Overall patients reported a mean OSS of 39.8 (±10.3), a mean EQ-5D utility score of 0.73 (±0.20), and 78% were able to return to work at a median of 1.2 months. There was a high prevalence of complications in both patients managed operatively or with closed reduction (25% and 38% respectively). In patients undergoing surgical management, 21% required subsequent surgery.

Patient reported outcome measures post proximal humerus fracture dislocations do not return to normal population levels. These injuries are associated with a high prevalence of complications regardless of management. Appropriate patient counselling should be undertaken before embarking on definitive management.
THE TRANSLATED PROXIMAL HUMERUS FRACTURE: A COMPARISON OF OPERATIVE AND NONOPERATIVE MANAGEMENT
Authors: Cosic F , Kirzner N , Edwards E , Page R , Kimmel L , Gabbe B
Published: February 2023

There is very limited literature describing the outcomes of management for proximal humerus fractures with more than 100% displacement of the head and shaft fragments as a separate entity. This study aimed to compare operative and non-operative management of the translated proximal humerus fracture.

A prospective cohort study was performed including patients managed at a Level 1 trauma centre between January 2010 to December 2018. Patients with 2, 3 and 4-part fractures were included based on the degree of translation of the shaft fragment (≥100%), resulting in no cortical contact between the head and shaft fragments. Outcome measures were the Oxford Shoulder Score (OSS), EQ-5D-5L, and radiological outcomes. Complications recorded included further surgery, loss of position/fixation, and non-union/malunion. Linear and logistic regression models were used to compare management options.

There were 108 patients with a proximal humerus fracture with ≥100% translation; 76 underwent operative management and 32 were managed non-operatively with sling immobilisation. The mean (SD) age in the operative group was 54.3 (±20.2) and in the non-operative group was 73.3 (±15.3) (p<0.001). There was no association between OSS and management options (mean 38.5(±9.5) operative vs mean 41.3 (±8.5) non-operative, p=0.48). Operative management was associated with improved health status outcomes; EQ-5D utility score adjusted mean difference 0.16 (95%CI 0.04-0.27, p=0.008); EQ-5D VAS adjusted mean difference 19.2 (95%CI 5.2-33.2, p=0.008). Operative management was further associated with a lower odds of non-union (adjusted OR 0.30, 95%CI 0.09-0.97, p=0.04), malunion (adjusted OR 0.14, 95%CI 0.04-0.51, p=0.003) and complications (adjusted OR 0.07, 95%CI 0.02-0.32, p=0.001).

Translated proximal humerus fractures with ≥100% displacement demonstrate improved health status and radiological outcomes following surgical fixation. Patients with this injury should be considered for operative intervention.
ACCEPTABILITY OF OPIOID TAPERING: PERSPECTIVES FROM A PRE-ARTHROPLASTY COHORT VERSUS CHRONIC PAIN COHORT (A QUALITATIVE STUDY)
Authors: Genel F. , Brady B. , Bossina S. , McMullan M. , Ogul S. , Ko P. , Vleeskens C. , Ly J. , Hassett G. , Huang A. , Penm J. , Adie S. , M. Naylor J.
Published: February 2023

There have been no studies assessing the acceptability of opioid tapering in the pre-arthroplasty setting. This qualitative study aimed to (1) explore barriers and facilitators to opioid tapering amongst patients with chronic non-cancer pain (CNCP), and (2) explore the similarities and differences in acceptability of opioid tapering between pre-arthroplasty patients and those participating in a biopsychosocial pain management program.

From January 2021, adult participants diagnosed with CNCP and taking opioids daily (any dose at time of screening for a period of 3 months) were recruited from either Fairfield Orthopaedic Hip and Knee Service (FOHKS) or Liverpool Hospital Pain Clinic (LHPC). Semi-structured interviews underwent thematic analysis using the framework method.

17 participants were recruited (FOHKS, n=9, mean age 67, female 77%, LHPC, n=8, mean age 54, female 63%). Both groups had participants who; (i) were reluctant to use opioid medications and used them out of “necessity”, (ii) were reluctant to taper due to concerns of worsening pain, quality of life, (iii) believed opioids were “toxins” causing bodily harm. Some FOHKS participants believed tapering should be a post-operative focus, whilst others believed tapering opioids pre-operatively will assist in post-op pain management. Few LHPC participants felt dependent/addicted to opioids, thus driving their intention to taper opioids.

The belief of tapering opioids causing worse pain was based on either previous experiences or concerns alone. Some FOHKS participants were more inclined to taper opioids if they were educated on the chronic and peri-operative risks associated with using opioids at time of arthroplasty.

Opioid users recognise the harms associated with chronic opioid use and believe they are used out of desperation for adequate analgesia, function, and quality of life. Tapering opioids in the pre-arthroplasty context may need coupling with patient education highlighting the importance of opioid tapering pre-operatively.
EVALUATION OF PROXIMAL FEMORAL BONE MINERAL DENSITY IN CEMENTLESS TOTAL HIP ARTHROPLASTY: A THREE-ARM PROSPECTIVE RANDOMIZED CONTROL TRIAL
Authors: Hooper G , Thompson D , Lash N , Sharr J , Faulkner D , Frampton C , Gilchrist N
Published: February 2023

Femoral stem design affects periprosthetic bone mineral density (BMD), which may impact long term survival of cementless implants in total hip arthroplasty (THA). The aim of this study was to examine proximal femoral BMD in three morphologically different uncemented femoral stems designs to investigate whether one particular design resulted in improved preservation of BMDMethods: 119 patients were randomised to receive either a proximally coated dual taper wedge stem, a proximally coated anatomic stem or a fully coated collarless triple tapered stem. All surgeries were performed via the posterior approach with mobilization on the day of surgery. Dual energy x-ray absorptiometry scans (Lunar iDXA, GE Healthcare, Madison, WI) assessed BMD across the seven Gruen zones pre-operatively, and post-operatively at 6-weeks, 1-year, and 2-years and compared to the unoperated contralateral femur as a control. Patient reported outcome measures of pain, function and health were also included at these corresponding follow-ups.

BMD increased in zones one (2.5%), two (17.1%), three (13.0%), five (10%) and six (17.9%) for all stems. Greater preservation of BMD was measured on the lateral cortex (zone 2) for both the dual taper wedge and anatomic stems (p = 0.019). The dual taper wedge stem also demonstrated preservation of BMD in the medial calcar (zone 7) whilst the anatomic and triple taper stem declined in this region, however this was not statistically significant (p = 0.059). BMD decreased on average by 2.1% inthe mid-diaphysis region, distal to the stem tip (zone 4) for all implants. All stems performed equivalently at final follow-up in all patient reported outcome measures.

This study demonstrated maintenance of femoral BMD in three different cementless femoral stem designs, with all achieving excellent improvements in patient reported outcomes. There was no significant stress shielding observed, however longer follow-up is required to elucidate the impact of this finding on implant survivorship.
TRENDS IN REVISION HIP ARTHROPLASTY SURGERY: A 21-YEAR REVIEW OF THE NEW ZEALAND JOINT REGISTRY
Authors: Hannah A , Henley E , Frampton C , Hooper G
Published: February 2023

This study aimed to examine the changing trends in the reasons for total hip replacement (THR) revision surgery, in one country over a twenty-one year period, in order to assess whether changes in arthroplasty practices have impacted revision patterns and whether an awareness of these changes can be used to guide clinical practice and reduce future revision rates.

The reason for revision THR performed between January 1999 and December 2019 was extracted from the New Zealand Joint Registry (NZJR). The results were then grouped into seven 3-year periods to allow for clearer visualization of trends. The reasons were compared across the seven time periods and trends in prosthesis use, patient age, gender, BMI and ASA grade were also reviewed. We compared the reasons for early revision, within one year, with the overall revision rates.

There were 20,740 revision THR registered of which 7665 were revisions of hips with the index procedure registered during the 21 year period. There has been a statistically significant increase in both femoral fracture (4.1 – 14.9%, p<0.001) and pain (8.1 – 14.9%, p<0.001) as a reason for hip revision. While dislocation has significantly decreased from 57.6% to 17.1% (p<0.001). Deep infection decreased over the first 15 years but has subsequently seen further increases over the last 6 years. Conversely both femoral and acetabular loosening increased over the first 12 years but have subsequently decreased over the last 9 years. The rate of early revisions rose from 0.86% to 1.30% of all revision procedures, with a significant rise in revision for deep infection (13-33% of all causes, p<0.001) and femoral fracture (4-18%, p<0.001), whereas revision for dislocation decreased (59-30%, p<0.001). Adjusting for age and gender femoral fracture and deep infection rates remained significant for both (p<0.05). Adjusting for age, gender and ASA was only significant for infection.

The most troubling finding was the increased rate of deep infection in revision THR, with no obvious linked pattern, whereas, the reduction in revision for dislocation, aseptic femoral and acetabular loosening can be linked to the changing patterns of the use of larger femoral heads and improved bearing surfaces.
GENDER BIAS IN THE PROVISION OF TOTAL KNEE ARTHROPLASTY: AN ANALYSIS OF THE AUSTRALIAN ORTHOPAEDIC ASSOCIATION NATIONAL JOINT REPLACEMENT REGISTRY
Authors: Ward J.K. , Di Bella C.
Published: February 2023

For all the research into arthroplasty, provision of total knee arthroplasty (TKR) services based on gender in the Australian context is yet to be explored. International literature points toward a heavily gender biased provision of TKA services, skewed away from female patients. This research has aimed to assess the current experience of Australian female patients and to explore better assessment techniques that could provide more equitable services.

A retrospective cohort analysis has been conducted using pre-op PROMs data, where available, from the Australian National Joint Replacement Registry (AOANJRR), between 7 August 2018 and 31 December 2021, including: EQ VAS Health; Oxford Knee Score; joint pain; and KOOS-12. Data was adjusted for age, ASA score, BMI, primary diagnosis, public vs private hospital, surgeon gender and years of practice (as estimated from years of registry data available). Of 1,001,231 procedures performed, 27,431 were able to be analysed (12,300 male and 15,131 female).

Gender-based bias against female patients reached statistical significance across all PROM scores, according to the Kruskal-Wallis test of difference (p-value <0.0001). Males were more likely to undergo TKR than females, with odds ratios remaining statistically significant when adjusted for age, ASA score, BMI, primary diagnosis, and hospital type. Numbers were further analysed for surgeon years of recorded practice and surgeon gender with mixed results.

This study found that women were less likely to undergo TKR despite worse scores on every pre-op PROM available, thus we demonstrate a statistically significant gender-based bias against female patients. More effort needs to be made to identify the base of this bias and find new ways to assess patients that can provide more equitable provision of healthcare.
SHAPE MODELLING OF MUSCLES TO UNDERSTAND PROGRESSION OF PAEDIATRIC CEREBRAL PALSY
Authors: Bin Ghouth S. , Williams S. , Reid S. , Besier T. , Stott N.S. , Handsfield G.
Published: February 2023

Cerebral palsy (CP) is a neural condition that impacts and impairs the musculoskeletal system. Skeletal muscles, particularly in the lower limb, have previously been shown to be significantly reduced in volume in CP compared to typical controls. Muscle volume is a gross measure, however, and does not capture shape characteristics which—if quantified—could offer a robust and novel assessment of how this condition impacts skeletal muscle form and function in CP. In this study, we used mathematical shape modelling to quantify not just size, but also the shape, of soleus muscles in CP and typically developing (TD) cohorts to explore this question.

Shape modelling is a mathematical technique used previously for bones, organs, and tumours. We obtained segmented muscle data from prior MRI studies in CP. We generated shape models of CP and TD cohorts and used our shape models to assess similarities and differences between the cohorts, and we statistically analysed shape differences.

The shape models revealed similar principal components (PCs), i.e. the defining mathematical features of each shape, yet showed greater shape variability within the CP cohort. The model revealed a distinct feature (a superior –> inferior shift of the broad central region), indicating the model could identify muscular features that were not apparent with direct observation. Two PCs dominated the differences between CP and TD cohorts: size and aspect ratio (thinness) of the muscle.

The distinct appearance characteristic in the CP model correspond to specific muscle impairments in CP to be discussed further. Overall, children with CP had smaller muscles that also tended to be long, thin, and narrow. Shape modelling captures shape features quantitatively, which indicate the ways that muscles are being impacted in CP. In the future, we hope to tailor this technique toward informing diagnosis and treatments in CP.
MACROSCOPIC OSTEOCHONDRAL INJURIES OF THE TALAR DOME ASSOCIATED WITH PILON FRACTURES
Authors: Tetsworth K. , Green N. , Barlow G. , Stubican M. , Vindenes F. , Glatt V.
Published: February 2023

Tibial pilon fractures are typically the result of high-energy axial loads, with complex intra- articular fractures that are often difficult to reconstruct anatomically. Only nine simultaneous pilon and talus fractures have been published previously, but we hypothesised the chondral surface of the dome is affected more frequently.

Data was acquired prospectively from 154 acute distal tibial pilon fractures (AO/OTA 43B/C) in adults. Radiographs, photographs, and intra-operative drawings of each case were utilised to document the presence of any macroscopic injuries of the talus. Detailed 1x1mm maps were created of the injuries in each case and transposed onto a statistical shape model of a talus; this enables the cumulative data to be analysed in Excel. Data was analysed using a Chi-squared test.

From 154 cases, 104 were considered at risk and their talar domes were inspected; of these, macroscopic injuries were identified in 55 (52.4%). The prevalence of talar dome injury was greater with B-type fractures (53.5%) than C-type fractures (31.5%) (ρ = .01). Injuries were more common in men than women and presented with different distribution of injuries (ρ = .032). A significant difference in the distribution of injuries was also identified when comparing falls and motor vehicle accidents (ρ = .007).

Concomitant injuries to the articular surface of the dome of the talus are relatively common, and this perhaps explains the discordance between the post-operative appearance following internal fixation and the clinical outcomes observed. These injuries were focused on the lateral third of the dome in men and MVAs, whereas women and fall mechanism were more evenly distributed.

Surgeons who operatively manage high-energy pilon fractures should consider routine inspection of the talar dome to assess the possibility of associated macroscopic osteochondral injuries.
SUPPLEMENTARY MEDIAL PLATING FOR DISTAL FEMORAL FRACTURES: A SURGICAL TECHNIQUE WITH CLINICAL OUTCOMES
Authors: Lee H.S. , Lewis D.P. , Balogh Z.J.
Published: February 2023

Distal femur fractures (DFF) are common, especially in the elderly and high energy trauma patients. Lateral locked osteosynthesis constructs have been widely used, however non-union and implant failures are not uncommon. Recent literature advocates for the liberal use of supplemental medial plating to augment lateral locked constructs. However, there is a lack of proprietary medial plate options, with some authors supporting the use of repurposing expensive anatomic pre-contoured plates. The aim of this study was to investigate the feasibility of a readily available cost-effective medial implant option.

A retrospective analysis from January 2014 to June 2022 was performed on DFF (primary or revision) managed with supplemental medial plating with a Large Fragment Locking Compression Plate (LCP) T-Plate (~$240 AUD) via a medial sub-vastus approach. The T-plate was contoured and placed superior to the medial condyle. A combination of 4.5mm cortical, 5mm locking and/or 6.5mm cancellous screws were used, with oblique screw trajectories towards the distal lateral cortex of the lateral condyle. All extra-articular fractures and revision fixation cases were allowed to weight bear immediately. The primary outcome was union rate.

This technique was utilised on sixteen patients; 3 acute, 13 revisions; mean age 52 years (range 16-85), 81% male, 5 open fractures. The union rate was 100%, with a median time to union of 29 weeks (IQR 18-46). The mean follow-up was 15 months. There were two complications: a deep infection requiring two debridements and a prominent screw requiring removal. The mean range of motion was 1–108o.

Supplemental medial plating of DFF with a Large Fragment LCP T-Plate is a feasible, safe, and economical option for both acute fixation and revisions. Further validation on a larger scale is warranted, along with considerations to developing a specific implant in line with these principles.
MINIMIZING COMPLICATIONS IN BIKINI INCISION DIRECT ANTERIOR APPROACH TOTAL HIP ARTHROPLASTY: A SINGLE-SURGEON SERIES OF 865 CASES
Authors: Nizam I. , Alva A. , Gogos S.
Published: February 2023

The purpose of this study was to report all complications during the first consecutive 865 cases of bikini incision direct anterior approach (DAA) total hip arthroplasty (THA) performed by a single surgeon. The secondary aims of the study are to report our clinical outcomes and implant survivorship. We discuss our surgical technique to minimize complication rates during the procedure.

We undertook a retrospective analysis of our complications, clinical outcomes and implant survivorship of 865 DAA THA's over a period of 6 years (mean = 5.1yrs from 2.9 to 9.4 years).

The complication rates identified in this study were low. Medium term survival at minimum 2-year survival and revision as the end point, was 99.53% and 99.84% for the stem and acetabular components respectively. Womac score improved from 49 (range 40-58) preoperatively to 3.5(range 0-8.8) and similarly, HHS scores improved from 53(range 40-56) to 92.5(range 63-100) at final follow-up (mean = 5.1 yrs) when compared to preoperative scores.

These results suggest that bikini incision DAA technique can be safely utilised to perform THA.
A RANDOMIZED CONTROLLED STUDY OF AUTOLOGOUS TENOCYTE INJECTION (ATI) VERSUS CORTICOSTEROID INJECTION FOR INTERSTITIAL ROTATOR CUFF TEAR AND IMPINGEMENT SYNDROME
Authors: Wang A. , Hughes J. , Fitzpatrick J. , Breidhahl W. , Ebert J. , Zheng M.
Published: February 2023

Interstitial supraspinatus tears can cause persistent subacromial impingement symptoms despite non operative treatment. Autologous tendon cell injection (ATI) is a non-surgical treatment for tendinopathies and tear. We report a randomised controlled study of ATI compared to corticosteroid injection (CS) as treatment for interstitial supraspinatus tears and tendinopathy.

Inclusion criteria were patients with symptom duration > 6 months, MRI confirmed intrasubstance supraspinatus tear, and prior treatment with physiotherapy and ≥ one CS or PRP injection. Participants were randomised to receive ATI to the interstitial tear or corticosteroid injection to the subacromial bursa in a 2:1 ratio, under ultrasound guidance. Assessments of pain (VAS) and function (ASES) were performed at baseline, and 1, 3, 6 and 12 months post treatment.

30 participants (19 randomised to ATI) with a mean age of 50.5 years (10 females) and a mean duration of symptoms of 23.5 months. Baseline VAS pain and ASES scores were comparable between groups. While mean VAS pain scores improved in both groups at 3 months after treatment, pain scores were superior with ATI at 6 months (p=0.01). Mean ASES scores in the ATI group were superior to the CS group at 3 months (p=0.026) and 6 months (p=0.012). Seven participants in the CS group withdrew prior to 12 months due to lack of improvement. At 12 months, mean VAS pain in the ATI group was 1.6 ± 1.3. The improvements in mean ASES scores in the ATI group at 6 and 12 months were greater than the MCID (12.0 points). At 12 months, 95% of ATI participants had an ASES score > the PASS (patient acceptable symptom state).

This is the first level one study using ATI to treat interstitial supraspinatus tear. ATI results in a significant reduction in pain and improvement in shoulder function.
EXTERNAL PNEUMATIC COMPRESSION FOR PREOPERATIVE MANAGEMENT OF SWELLING FOR ANKLE FRACTURES: A PROSPECTIVE RANDOMIZED CONTROLLED TRIAL
Authors: Blundell J. , Hope M.
Published: February 2023

Patients awaiting resolution of swelling and oedema prior to ankle surgery can represent a significant burden on hospital beds. Our study assessed whether external pneumatic intermittent compression (EPIC) can reduce delays to surgery.

Our prospective randomised controlled trial (n= 20) compared outcomes of patients treated with EPIC vs control group managed with ice and elevation. Included were patients aged <18 years with isolated closed ankle fractures admitted for management of swelling prior to surgery. Excluded were open fractures, injuries to contralateral leg, diabetes, absent pulses, peripheral vascular disease, inability to consent, no requirement for admission. Eligible patients were randomised to active or control arms. All patients were managed initially with reduction and back slab application. Patients in active arm fitted with EPIC (Hydroven 3000) device over the back slab. Assessment by treating team determined the time at which patient is assessed ready for surgery.

Patients in the treatment arm were assessed as ready for surgery sooner, (123 hrs vs 168hrs, T score = 1.925, P 0.035) and had a shorter time to surgery (167 hrs vs 216 hrs, T score = 1.748, P 0.047) Length of stay was reduced bud did not reach statistical significance. (259 hrs vs 269 hrs, T score 0.229, P 0.41)

Our results showed a statistically and clinically significant reduction in time that patients were assessed ready for surgery and time to surgery in the treatment cohort. We conclude that although further data is needed to achieve an adequately powered study and assess the safety profile of the EPIC, incorporation of EPIC into routine clinical practice has the potential for significant cost savings.
USE OF CEMENTED FEMORAL COMPONENT FOR REVISION IN PERIPROSTHETIC FEMORAL FRACTURES (PFF) IN THE ELDERLY
Authors: Gibbons J.P. , Bodian C. , Powell A.J. , Sharr J.P. , Lash N.J.
Published: February 2023

PFFs are an increasing burden presenting to the acute trauma services. The purpose of this study is to show that cemented revision for Vancouver B2/B3 PFFs is a safe option in the geriatric population, allows early pain-free weight bearing and comparable to a control-group of uncemented stems with regard to return to theatre and revision surgery.

A retrospective review was conducted of all PFFs treated in a Level 1 trauma centre from 2015-2020. Follow up x-rays and clinical course through electronic chart was reviewed for 78 cemented revisions and 49 uncemented revisions for PFF. Primary endpoints were all cause revision and return to theatre for any reason. Secondary endpoints recorded mobility status and all-cause mortality.

In the cemented group there were 73 Vancouver B2, 5 Vancouver B3 PFF; the mean age was 79.7 years and mean radiological follow-up of 11.9 months. In the cementless group there were 32 Vancouver B2 and 17 Vancouver B3 PFFs; with all 49 patients undergoing distally bearing uncemented revision, the mean age was 72.7 years and mean radiological follow-up of 21.3 months.

Patients treated with a cemented prosthesis had significantly higher ASA score (2.94 -v- 2.43, p<0.001). The primary endpoints showed that there was no significant difference in all cause revision 3/78 and 5/49 p=0.077, or return to theatre 13/78 -v- 12/49 p=0.142.

Secondary endpoints revealed no significant difference in in-hospital mortality. The cementless group were more likely to be mobilising without any aid at latest follow-up 35/49 -v- 24/78 p<0.001.

The use of cemented revision femoral component in the setting of PFFs is one option in the algorithm for management of unstable PFFs according to the Vancouver classification. Evidence from this case-control study, shows that the all-cause revision and return to theatre for any cause was comparable in both groups.
OUTCOMES OF PATIENTS WITH SOFT-TISSUE SARCOMA AT MIDDLEMORE HOSPITAL BEFORE AND AFTER INTRODUCTION OF THE NZ SARCOMA STANDARDS
Authors: Rosser K. , Ryu J. , Deo S. , Flint M.
Published: February 2023

The NZ Standards of Service Provision for Sarcoma patients were developed by the NZ Sarcoma working group and published by the Ministry of Health (MOH) in 2013. Although not formally enacted by the MOH we aimed to determine the impact of these published standards and referral pathways on disease-specific survival of patients with soft-tissue sarcoma in NZ.

The Middlemore Musculoskeletal Tumour Unit database was searched. Patients referred for treatment in our centre with a diagnosis of soft tissue sarcoma in the five-year period before (n=115) and after (n=155) were included. We excluded patients with bone sarcomas and retroperitoneal soft tissue sarcomas.

The rate of referral after inappropriate treatment reduced after implementation of the Standards (24% vs 12%, p=0.010). The number of patients referred with tumours larger than 50mm decreased (74.8% vs 72.3%, p=0.021) and fewer had metastases at diagnosis (11.3% vs 3.2%, p=0.017). Mortality was lower in the group after introduction of the Standards (45% vs 30%, p=0.017). The estimated disease-specific survival curve between the two groups shows a trend towards increased survival in the post-standards group, although not reaching statistical significance. Local recurrence rate and metastasis rate after definitive treatment were similar between the two groups. Patients had a shorter duration of symptoms before referral in the post-Standards group although this was not statistically significant.

Since implementation of the Standards, patients have been referred more promptly, with fewer inappropriate treatments. The time to mortality curve indicates a trend towards improved disease-specific survival. We conclude that the pathway for investigation and referral for this condition has become clearer, supporting the ongoing use of the Sarcoma Standards, and that these should be formally implemented by the MOH.
THE DEGREE OF GLUTEAL TENDINOPATHY CORRELATES WITH WORSENING PROMS IN TOTAL HIP ARTHROPLASTY: A PROSPECTIVE STUDY OF 797 PATIENTS
Authors: Lin D , Gooden B , Lyons M , Salmon L , Martina K , Sundaraj K , Yong Yau Tai J , O'Sullivan M
Published: February 2023

The prevalence of gluteal tendinopathy (GT) associated with osteoarthritis of the hip is difficult to determine as it is frequently undiagnosed or misdiagnosed as trochanteric bursitis. Its relationship to total hip arthroplasty (THA) outcomes is currently unknown. The aim of this study was to determine the incidence of GT at the time of hip arthroplasty and examine the relationship between GT and patient reported outcomes (PROMS) before and after THA.

Patients undergoing THA for primary osteoarthritis between August 2017 and August 2020 were recruited. Tendinopathy was assessed and graded at time of surgery. PROMS included the Oxford Hip Score (OHS), HOOS JR, EQ-5D, and were collected preoperatively and at one year after THA. Satisfaction with surgery was also assessed at 1 year.

797 patients met eligibility criteria and were graded as Grade 1: normal tendons (n =496, 62%), Grade 2: gluteal tendinopathy but no tear (n=222, 28%), Grade 3: partial/full thickness tears or bare trochanter (n=79, 10%). Patients with abnormal gluteal tendons were older (p=0.001), had a higher mean BMI (p=0.01), and were predominately female (p=0.001). Patients with higher grade tendinopathy had statistically significant inferior PROMS at one year, OHS score (44.1 v 42.9 v 41.3, p 0.001) HOOS JR (89.3 V 86.3 V 85.6 p 0.005). Increasing gluteal tendon grade was associated with a greater incidence of problems with mobility (p=0.001), usual activities (p=0.001) and pain (p=0.021) on EQ5D. There was a 3 times relative risk of overall dissatisfaction with THA in the presence of gluteal tears.

This study demonstrated that gluteal tendinopathy was commonly observed and associated with inferior 1-year PROMS in patients undergoing THA for OA. Increasing degree of tendinopathy was a negative prognostic factor for worse functional outcomes and patient satisfaction.
TWENTY-YEAR SURVIVAL OF HIGH TIBIAL OSTEOTOMY
Authors: Sundaraj K , Russsell V , Salmon L , Pinczewski L
Published: February 2023

The aim of this study was to determine the long term 20 year survival and outcomes of high tibial osteotomy (HTO).

100 consecutive subjects underwent HTO under the care of a single surgeon between 2000 and 2002, consented to participation in a prospective study and completed preoperative WOMAC scores. Subjects were reviewed at 10 years, and again at a minimum of 20 years after surgery. PROMS included further surgery, WOMAC scores, Oxford Knee Score (OHS), KOOS, and EQ-5D, and satisfaction with surgery. 20 year survival was assessed with Kaplan-Meir analysis, and failure defined as proceeding to subsequent knee arthroplasty.

The mean age at HTO was 50 years (range 26-66), and 72% were males. The 5, 10, and 20 year survival of the HTO was 88%, 76%, 43% respectively. On multiple regression analysis HTO failure was associated with poor preoperative WOMAC score of 45 or less (HR 3.2, 95% CI 1.7-6.0, p=0.001), age at surgery of 55 or more (HR 2.3, 95% CI 1.3-4.0, p=0.004), and obesity (HR 1.9, 95% CI 1.1-3.4, p=0.023). In patients who met all criteria of preoperative WOMAC score of 45 or less, age <55 years and body mass index of <30 HTO survival was 100%, 94%, and 59% at 5, 10 and 20 years respectively. Of those who had not proceeded to TKA the mean Oxford Score was 40, KOOS Pain score was 91 and KOOS function score was 97. 97% reported they were satisfied with the surgery and 88% would have the same surgery again under the same circumstances.

At 20 years after HTO 43% had not proceeded to knee arthroplasty, and were continuing to demonstrate high subjective scores and satisfaction with surgery. HTO survival was higher in those under 55 years, with BMI <30 and baseline WOMAC score of >45 at 59% HTO survival over 20 years. HTO may be considered a viable procedure to delay premature knee arthroplasty in carefully selected subjects.
WEIGHT CHANGES AFTER HIP AND KNEE ARTHROPLASTY, AND THE EFFECT OF OBESITY ON OUTCOMES
Authors: Sundaraj K , Gooden B , Lyons M , Roe J , Carmody D , Pinczewski L , Huang P , Salmon L , Martina K , Smith E , O'Sullivan M
Published: February 2023

Obesity is a common in individuals undergoing arthroplasty, and the potential for weight loss with improved mobility may be expected by some. The aim of this study was 1. determine the proportion that achieved weight loss after hip or knee arthroplasty, and 2. examine the effect of obesity on patient reported outcomes (PROMS) and satisfaction with surgery.

Participants underwent primary TKA or THA between July 2015 and December 2020 and consented to participation in a research database with baseline PROMS, including weight, BMI, Oxford Knee, or Hip Score, and EQ5D. Participants repeated PROMS at 12 months after surgery with additional questions regarding satisfaction with surgery.

3449 patients completed PROMS 1 year after arthroplasty with weight and BMI. There were 1810 THA and 1639 TKA procedures. The mean baseline BMI was higher in TKA (29.8, SD 5.2) compared to THA (27.7, SD 5.0), p=0.001. A higher proportion of TKA were classified as obese class 1 (29% TKA, 19% THA), obese class 2 (11% TKA and 6% THA), and obese class 3 (5% TKA and 2% THA), p=0.001. The mean weight loss after 1 year was 0.4kg and 0.9kg in obese THA subjects and TKA subjects respectively. In the obese >5kg weight loss was achieved in 13% of TKA and 7% of THA (p=0.001). Obese experienced equivalent improvement in Oxford scores, compared to non-obese subjects. Satisfaction with surgery was reported by 95% of THA and 91% of TKA subjects with no significant differences between BMI group grades (p=0.491 THA and p=0.473 TKA).

Preoperative obesity was observed in 44% of TKA and 27% of THA subjects. In the obese only 1 in 10 subjects lost 5kg or more over 12 months. Obese patients experienced equivalent improvements in outcome after arthroplasty and rates of satisfaction with surgery to the non-obese.
Analysis of Factors Influencing Mechanical Properties of Corrugated Steel Based on Entropy Method
Authors: Taiheng Wang , Wei Li , Meng Chen , Bin Liu , Jun Wang
Published: February 2023

In recent years, corrugated steel has been used in some domestic tunnel construction for its large section and high strength, and has become a new type of tunnel support structure. Corrugated steel mechanical properties will directly affect the stability of support structure. Therefore, the important thing is to choose the appropriate parameter to improve the mechanical performance of ripples. Parameters that affecting the mechanical properties of corrugated steel include wave height, corrugation thickness and wave distance. This massage will rely on the Qipan Mountain tunnel project, studying its fabricated corrugated steel supporting structure, and selects corrugated steel with different thicknesses, wave heights and corrugated spans for transient analysis. The largest deformation of corrugated steel under blasting shock is calculated by numerical simulation to react the corrugated steel mechanical properties, and then use the method of Entropy to determine the influence of different parameter values on mechanical performance of corrugated steel. The weight coefficient of wave thickness is 92.38%, the influence weight coefficient of wave height is 7.54%, and the influence weight coefficient of wave short is 0.07%. It is shows that the thickness has the greatest influence on the mechanical properties of the supporting structure, and the wave distance has no influence. Through the above analysis, the parameter design and stability design of corrugated steel support structure can be given some reference and help.
SARIMA-Based Medium- and Long-Term Load Forecasting
Authors: Yin Chunlin , Liu Kaihua , Zhang Qiangjian , Hu Kai , Yang Zheng , Yang Li , Zhao Na
Published: February 2023

The operation and planning of power systems depend heavily on M-LTLF, which is complicated and nonlinear, making it challenging for conventional medium- and long-term forecasting models to produce reliable results. The SARIMA model is chosen for M-LTLF in this study, and the model’s parameters are tuned. This study takes the electricity consumption data of the whole Yunnan as the research object. Among them, the electricity consumption data from 2008 to 2018 is used as a training sample for fitting and analysis, and the electricity consumption of the whole province is predicted from 2019 to 2020. The end results demonstrate the viability and efficacy of the SARIMA model for M-LTLF.
Case Report of an Unusual Differential Diagnosis of a Red and Atraumatic Swollen Foot Charcot Arthropathy in Rheumatoid Arthritis
Authors: Groch J Berger , Falkenberg C S , Schöntag S , Reize P
Published: February 2023

Introduction: Neuropathic osteoarthropathy of the foot and ankle (Charcot foot) is a disease that can lead to progressive malpositioning and deformation up to complete collapse of the foot. In most cases, diabetic polyneuropathy is the underlying disease, but polyneuropathy of any cause can lead to neuropathic osteoarthropathy. Pathogenesis is still not completely understood. Due to the non-specific clinical presentation, the symptoms of Charcot arthropathy are generally easily misdiagnosed and proper therapy is delayed, especially in patients with an underlying disease other than diabetes mellitus. To date, published literature on patients with rheumatoid arthritis who develop neuropathic osteoarthropathy of the foot is scarce. Case Report: We present a rare case of a 61-year-old patient with Charcot foot and rheumatoid arthritis. The patient presented with an extreme foot deformity after a failed conservative treatment. The surgical procedures, complications, and outcome are described. The pitfalls in this special patient group are highlighted. Conclusion: If necessary, a variety of surgical options are available to maintain ambulation and prevent infection from open ulcers and amputation. For surgical management of patients with rheumatoid arthritis, the overall statics of the lower extremity and the influence of antirheumatic drugs must be considered. Keywords: Rheumatoid arthritis, neuropathic osteoarthropathy, foot deformities, arthrodesis, Charcot foot.
Fibrodysplasia Ossificans Progressiva: A Case Series with Radiologic Findings
Authors: Malik Ipanshu , Sharma S C , Padhiyar Mahipal Ajitsinh , Rawal Nitin , Mukherjee Mayukh
Published: February 2023

Introduction: It is an autosomal dominant genetic disease presented with heterotopic ossification of connective tissues after birth and a defect of the big toes. One in ten million births is affected by it worldwide. As a result, diagnosis and management of fibrodysplasia ossificans progressiva (FOP) can be delayed or misdiagnosed. Clinical assessment, radiographic examination, and genetic study of the Activin receptor Type 1A gene are among the diagnostic techniques used to identify this disease. Case Report: We are presenting three female cases having FOP in this article of different age groups. It presented with multiple non-tender lumps on patients’ paravertebral region along with bilateral hallux valgus. The radiograph revealed ossifications of soft tissue involving spine and neck. The patient was given a conservative treatment approach and told what could be done to prevent flare-ups. Conclusion: Being a rare, progressive, and often misdiagnosed condition, early diagnosis is advocated. Long-term physiotherapy and muscle trauma prevention can delay it as much as possible to prevent future disabilities. Keywords: ACVR1 gene, dystrophic ossification, hard bony nodule, heterotopic ossification, hypoplastic great toe, myositis ossificans progressive, ossifications of soft tissue.
Recurrent Giant Cell Tumor of the Distal End of the Femur
Authors: Parikh Mishil Sandeep , Kale Sachin Yashwant , Sawant Raj Milind , Sane Rohit Mahesh , Chaudhari Prasad Liladhar
Published: February 2023

Introduction: The aim of the study was a case report of a right-sided recurrent giant cell tumor of the distal end of the femur. Methodology: A case of a 25-year-old male patient with a history of recurrent giant cell tumor of the right distal femur who presented with chief complaints of pain over right distal femur and stiffness in the right knee for 2 years with restricted knee movement and is unable to walk. He was diagnosed with recurrent giant cell tumor of the right of the distal femur and was treated with wide excision with mega prosthesis reconstruction. Result: Wide excision with mega prosthesis reconstruction showed a good functional range of motion with early rehabilitation, stability, and mobility of joints. Conclusion: We recommend wide excision and reconstruction with mega prosthesis is an effective method compared to sandwich technique and nailing and can be successfully done in the case of recurrent giant cell tumor of the distal femur with a good outcome, functional range of motion, stability, and mobility of the joint with early rehabilitation though it is a technically demanding surgery. The knee joint could have been salvaged and the need for more extensive surgery could have been prevented, had the diagnosis of recurrent giant cell tumor was made earlier. Keywords: Recurrent giant cell tumor, mega prosthesis , reconstruction, wide excision.
Closed Reduction of Chronically Subluxated knee with Deftix (Made in India Hexapod)
Authors: Chalak Ajit Rajshekhar , Kale Sachin Yashwant , Sawant Raj Milind , Sane Rohit Mahesh , Chaudhari Prasad Liladhar
Published: February 2023

Introduction: The aim of the study was to study results of (made in India) hexapod external fixator (HEF) (deft fix)-assisted correction in a case of knee subluxation with malunited medial tibial condyle fracture. Methodology: A subject with knee subluxation was selected for application of hexapod and Ilizarov ring fixator for staged correction of subluxation using deft fix-assisted correction. Result: The study shows anatomical reduction of the subluxated knee using HEF with deft fix-assisted correction. Conclusion: The HEF does not require frame transformation and is easier to use and is known to have the ability to correct complex multiplanar deformities better and much faster than the traditional Ilizarov ring fixator which requires multiple changes in hardware while correcting complex deformities. Software-assisted hexapod correction provides more faster and accurate correction with the ability to do fine adjustments at any stage of correction. Keywords: Hexapod fixator, external fixator, knee subluxation, deftfix.
Prevention of Severe Post-operative Urinary Retention after Spinal Surgery for Lumbar Spinal Stenosis: A Technical Review and Five-patient Case Series
Authors: Takaoka Hiromitsu , Orita Sumihisa , Inage Kazuhide , Shiga Yasuhiro , Eguchi Yawara , Ohtori Seiji
Published: February 2023

Introduction: Post-operative urinary retention is a common complication of posterior spine surgery for lumbar spinal stenosis. However, it can result in considerable difficulty for the patient, especially when it is severe, as in cases of complete retention. Therefore, it is crucial to consider its risk factors. This report provides a retrospective review of cases with severe post-operative urinary retention with the aim of elucidating its possible risk factors. Case Presentation: Data of five patients with post-operative urinary retention after posterior spine surgery for lumbar spinal stenosis, operated in our facility from 2013 to 2020, were analyzed. Their age, preoperative Japanese Orthopaedic Association ( JOA) score, presence of pre-operative bladder and bowel disorders (BBD), presence of pre-operative muscle weakness, the mean number of vertebral levels operated on, complications such as intraoperative dural tear and hematoma, operative time, estimated blood loss, JOA score in the early post-operative period, and the recovery period for the urinary retention symptoms were examined. The mean pre-operative JOA score was 8.4, and the mean number of operated levels was 2.8. The incidence of pre-operative BBD, pre-operative muscle weakness, intraoperative dural tears, and post-operative hematoma was two each. The mean operative time was 242 min, mean estimated blood loss was 352 g, and the mean JOA score in the early post-operative period was 5.8. The recovery period for urinary retention ranged from 4 days to 9 months postoperatively; one patient also had cervical and thoracic spinal stenosis and underwent decompression of all stenotic levels for relief from complete urinary retention. Conclusion: In our retrospective review of cases with severe post-operative urinary retention after lumbar spinal stenosis surgery, all patients had severe pre-operative symptoms and spinal stenosis at multiple levels. An awareness of potential risk factors and carefully and gently performing the intraoperative procedures can facilitate lesser damage to the spinal nerve. Keywords: Urinary retention, severe preoperative symptoms, hematoma, dural tear, multiple spinal stenosis.