bluuebunny/crossref_metadata_2025 huggingface dataset:
Biomechanical Comparison of Zone 1 5th Metatarsal Base Fracture Fixation
Authors: Bean Bryan , Smyth Niall A. , Abbasi Pooyan , Parks Brent , Hembree Walter C.
Published: November 2020

Category:

Basic Sciences/Biologics; Midfoot/Forefoot

Introduction/Purpose:

Zone 1 5th metatarsal base fractures are more common than zone 2 or 3 fractures, but significant debate still exists as to their optimum management, particularly for large fragments. The objective of this study was to compare the biomechanical strength of two headless compression screws versus a hook plate for fixation of large zone 1 5th metatarsal fractures. We hypothesized that hook plates would be biomechanically superior.

Methods:

Ten matched pairs of fresh-frozen 5th metatarsal cadaveric specimens were used. Large zone 1 avulsion fractures were simulated. Specimens were randomly assigned to fixation with two 2.5-mm headless compression screws or an anatomic 5th metatarsal hook plate. Specimens were mounted on a test frame and cyclically loaded through the plantar fascia, peroneus brevis tendon, and metatarsal base. Each specimen underwent 100 cycles at 50% physiological load (12 N on bone, 70 N on plantar fascia, 17.5 N on peroneus brevis), 100 cycles at 75% load (18 N on bone, 105 N on fascia, 26.25 N on peroneus brevis), and 100 cycles at 100% load (24 N on bone, 140 N on fascia, 35 N on peroneus brevis). Maximum cycles and maximum force were recorded.

Results:

The hook plate group had significantly higher cycles to completion of loading or failure compared with the screw group (270.7 +- 66.0 [range 100-300] cycles versus 178.6 +- 95.7 [range 24-300] cycles, respectively; P=0.011). Seven of 10 hook plate specimens and 2 of 10 screw specimens were intact at the maximum 300 cycles. Mean maximum force on the plantar fascia did not differ between the plate and screw groups (133.0 +- 22.1 [range 70-140]) N versus 119.0 +- 4.5 (range 70-140) N, respectively; P=0.098). Nine of 10 plate specimens and 5 of 10 screw specimens were intact at maximum force of 140 N.

Conclusion:

To our knowledge, this is the first biomechanical study comparing fixation constructs for 5th metatarsal avulsion fractures while loading the plantar fascia, which is the primary deforming force in vivo. These data suggest an anatomic hook plate is biomechanically superior to headless compression screw fixation of large zone 1 5th metatarsal avulsion fractures, which may prove pertinent in the setting of morbid obesity, fracture comminution, and/or fracture nonunion. Limitations include the relatively small sample size and the use of cadaveric bone which imperfectly mimics living tissue.
Long-term Outcomes of Coalition Resection in Adult Tarsal Coalition
Authors: Bemenderfer Thomas B. , Boersma Jacob B. , Bohay Donald R. , Anderson John G. , Maskill John D.
Published: November 2020

Category:

Hindfoot; Other

Introduction/Purpose:

Although the diagnosis, treatment, and natural history of tarsal coalitions has been well described in the adolescent population, there remains a paucity of orthopaedic literature on outcomes associated with coalition resection with or without interposition in the adult population. This study is the first to evaluate clinical and radiographic outcomes in adult patients with tarsal coalition resection without interposition.

Methods:

All patients with symptomatic tarsal coalition (subtalar, calcaneonavicular, or talonavicular) who failed conservative management and underwent coalition resection with concomitant procedures as indicated by their pathology between January 2006 and December 2014 were included in our retrospective case series. Demographics, clinical outcomes, patient comorbidity information, visual analogue scale (VAS) pain scores were collected. Advanced imaging (CT or MRI) was reviewed to determine fibrocartilaginous or osseous coalition. The primary outcome was reoperation. Secondary outcomes were change in visual analog score (VAS), and minor complications (local wound care, use of antibiotics, and skin dehiscence).

Results:

68 patients (52.9% males, 47.1% females; average age 35.9 years old, range 18 to 70) met inclusion. Calcaneonavicular, subtalar, and talonavicular coalitions were resected in 45.6% (n=31), 54.4% (n=37), and 0% of patients, respectively. At average final clinical follow up of 36 months, there were a total of 33 reoperations in 33.8% of patients (n=23) most commonly including subsequent fusion (n=11), exostectomy (n=10), and removal of hardware (n=15). There was no significant difference in reoperation (42.3% versus 63.1%, p=0.454) or fusion (19.4% versus 19.2%, p=0.99) following subtalar or calcaneonavicular coalition resection. Average VAS score preoperatively and postoperatively was 5.8 to 3.0. Minor complications were present in 16.2% of patients (n=11; 3 local wound care, 10 use of antibiotics, and 0 skin dehiscence).

Conclusion:

The present study demonstrates overall improvement in VAS score by an average of 2.8 points following subtalar and calcaneonavicular coalition resection. Although 33.8% of patients may anticipate additional surgery, the majority of patients may expect long-term maintenance of improvement in pain without subsequent fusion.
Outcome of Concomitant First Metatarsophalageal and Tarsometatarsal Arthrodesis for Severe Hallux Valgus
Authors: Bemenderfer Thomas B. , Boersma Jacob B. , Pryor Michael J. , Maskill John D. , Anderson John G. , Bohay Donald R.
Published: November 2020

Category:

Bunion; Midfoot/Forefoot

Introduction/Purpose:

Arthrodesis of the first tarsometatarsal (TMT-1) joint is a widely accepted procedure for treatment of hallux valgus (HV) with medial column instability secondary to unstable first ray, midfoot arthritis, and severe or recurrent deformities with high intermetatarsal angles (IMA). Similarly, metatarsophalangeal fusion (MTP-1) has been suggested for severe hallux valgus, metatarsophalangeal arthritis, and severe or recurrent deformities. Prior studies have demonstrated early outcomes in a small sample of patients. This study aimed to evaluate clinical and radiographic outcomes in patients with severe HV who underwent concomitant TMT-1 and MTP-1 arthrodesis for severe HV.

Methods:

All patients with symptomatic severe HV who failed conservative management and underwent concomitant MTP-1 and TMT-1 arthrodesis between January 2006 to December 2018 were included in our retrospective case series. Patients were operated on by one of three senior foot and ankle surgeons at a single tertiary center. Demographics, clinical outcomes, patient comorbidity information, and radiographic outcomes including baseline hallux valgus angle (HVA), IMA 1-2, hallux valgus interphalangeus angle, distal metatarsal articular angle, and sesamoid station were collected. The primary outcome was reoperation. Secondary outcomes were minor complications (local wound care, use of antibiotics, and skin dehiscence), visual analogue scale (VAS) pain scores, and change in radiographic measurements.

Results:

From 2006 to 2018, 42 patients (21.4% male, 78.6% female) at an average age of 62.6 years (range 48 to 80) met inclusion. At final average clinical follow up of 28 months, there were a total of 23 reoperations in 35.7% of patients at an average 18.5 months from index surgery (n=15; 1 revision TMT, 2 revision MTP, 1 hallux interphalangeal (IP) fusion, and 11 hardware removal). Minor complications were present in 7.1% of patients (n=3; 3 local wound care, 2 use of antibiotics, and 3 skin dehiscence). Average VAS score preoperatively and postoperatively was 5.5 to 1.9, respectively. Average preoperative HVA and IMA 1-2 angles were 35.6 and 15.3 degrees compared to postoperative angles of 9.0 and 9.3 degrees, respectively.

Conclusion:

The present study demonstrates concomitant MTP-1 and TMT-1 arthrodesis in cases of HV secondary to medial column instability secondary to unstable first ray, midfoot arthritis, and severe or recurrent deformities with high IMA has a high correction capability and achieved normal HVA as well as normal IMA 1-2 at greater than two years. Concomitant MTP-1 and TMT-1 arthrodesis in patients with severe HV appeared to be safe and clinically successful.
A Prospective Assessment of Great Toe Fusion Outcomes: The Effect of Concomitant Procedures
Authors: Berkowitz Mark J. , Miniaci Sara-Lyn , Davis Alan , Ramanathan Deepak , Hasan Khalid , Strnad Greg , Coombs Jeffrey , Jin Yuxuan , Spindler Kurt P. , Pinney Stephen J.
Published: November 2020

Category:

Midfoot/Forefoot; Bunion

Introduction/Purpose:

Great toe fusion is the standard of care for severe hallux rigidus and other great toe pathology requiring definitive surgical management. Great toe fusion has proven an effective surgical treatment when correctly performed on appropriate patients. This study aimed to prospectively assess the clinical results of great toe fusion surgery in isolation compared to great toe fusion surgery combined with concomitant procedures.

Methods:

All patients undergoing a 1st metatarsophalangeal joint fusion from January 1st 2017 through June 30th 2018 were prospectively studied. Patients completed the Foot and Ankle Outcome Score (FAOS) and Veterans RAND 12 (VR-12) patient- reported outcome measures (PROMs) on the day of surgery (T0) and 12 months post-surgery (T1). Surgeons were surveyed regarding surgical details and patient characteristics. 204 patients underwent a great toe fusion during the study period. There were 67 enrollment failures (2 patient refusals, 63 incomplete T0 patient surveys, 2 incomplete surgeon surveys). Of the 137 patients completing the initial PROMs at T0, 100 patients (73%) also completed the PROMs at T1. Within this study group, 54 patients underwent an isolated great toe fusion and 46 underwent one or more concomitant procedures including hammertoe correction (30); MTP joint capsulotomy (22); Weil osteotomy (19); bunionette (2); metatarsal head resection (3); and other (12).

Results:

The study group consisted of 80 females and 20 males with age = 63.3 +/-8.5 and BMI = 28.3 +/-6.0. Indications for surgery included: hallux rigidus (26%), hallux valgus (35%), hallux varus (7%), arthritic bunions (30%) and other (2%). Fixation constructs included: a plate and a lag screw (82%), a plate alone (15%), and lag screws alone (3%). Patients undergoing isolated great toe fusions and those undergoing concomitant procedures both improved at one year (Table 1). Multivariable analysis demonstrated that after controlling for confounding variables, patients undergoing an isolated great toe fusion when compared to those also undergoing a concomitant procedure had higher odds for improvement in: FAOS pain (odds Ratio = 0.34, p=0.011); FAOS QoL (Odds Ratio=0.38, p=0.022); and VR-12 PCS (Odds Ratio=0.58, p=0.162).

Conclusion:

A great toe fusion can lead to substantial improvement in pain, quality of life, and overall physical function. However, this study demonstrates that the addition of a concomitant procedure such as a claw toe correction or a Weil osteotomy leads to an inferior outcome with respect to pain and quality of life when compared to an isolated great toe fusion. [Table: see text]
Salvage Tibiotalocalcaneal Arthrodesis Augmented with Fibular Columns and Iliac Crest Autograft: A Technical Note
Authors: Bernasconi Alessio , Patel Shelain , Malhotra Karan , Singh Dishan B. , Welck Matthew J. , Cullen Nicholas
Published: November 2020

Category:

Ankle; Ankle Arthritis

Introduction/Purpose:

End-stage ankle arthritis may be managed with ankle arthrodesis or total ankle replacement (TAR). Failure of these procedures results in a challenging clinical situation. Revision in these scenarios is technically demanding, and if associated with subtalar degeneration, conversion to tibiotalocalcaneal (TTC) arthrodesis may be required. Bone grafting may be necessary to maintain length and reduce disability, and fibular strut grafting in form of ‘pillars’ or ‘columns’ may be used in association with intramedullary TTC nailing. In our experience, fibular column autograft may be supplemented with tricortical and cancellous iliac crest graft and stabilised with cannulated screws and either an intramedullary nail or a lateral plate. In this technical note, we review the history of this technique and report indications, surgical approach, results and complications.

Methods:

A distal J-shaped lateral approach is performed over the posterior edge of the distal fibula. An oblique fibular cut is made with a saw at 8- 12 cm from the fibular tip. Careful removal of the implant, previous cement spacer or metalwork is performed then articular surfaces are prepared. After assessment of the articular gap, the autograft is prepared by removing the tip of the fibula from the fibular block, then sectioning it in to either three or four columns which are positioned into the gap and stabilised either in a press-fit fashion or using 1.6mm K-wires. Six patients (4M, 2F; mean age: 69.8 years (range, 51 to 83)) were treated between December 2018 and March 2019 (5 failed TAR and 1 was symptomatic tibiotalar non-union) at our institution. Fixation was achieved in 5 cases with a locked intramedullary nail and in 1 case with a lateral locking plate.

Results:

At a mean follow up of 10 months (range, 6 to 11 months), 4 patients had clinically and radiologically united and were satisfied with the outcome of surgery. Two patients remained dissatisfied having not united: one patient with a background of chronic kidney disease had raised inflammatory blood markers at 10 months and is undergoing investigation to exclude infection whilst one other patient with no obvious risk factors for non-union has started low intensity pulsed ultrasound treatment at 6 months. No other complications were observed.

Conclusion:

Tibiotalocalcaneal fusion augmented with fibular columns and iliac crest autograft is an option to treat combined ankle and the subtalar joint pathologies with significant talar bone loss. However larger studies with longer follow-up are required to define the rates of success and failure with future research directed to better understand which factors may predict the outcome.
Fractures of the Tibial Plafond: Does the Presence or Absence of a Fibular Fracture Predict Future Morbidity?
Authors: Boateng Henry , Walley Kempland C. , Nwachuku Chinenye , Lands Vince , Walker Justin W. , Mirza Muhammad Z. , MacNeille Rhett , Tornetta Paul , Reid Spence
Published: November 2020

Category:

Trauma; Ankle

Introduction/Purpose:

Surgical management pilon fractures continue to be a challenge for orthopedic surgeons. Despite a staged protocol, anatomic reduction, and stable fixation, many patients will require secondary procedures including ankle arthrodesis to treat painful post-traumatic arthritis. Some investigators have correlated the absorbed energy at the time of the injury with the natural history of the pilon fracture despite the quality of the surgical reconstruction. We hypothesize that the presence of an intact fibula in association with an OTA Type C pilon fracture may be a marker for a strict axial compression mechanism resulting in more severe cartilage compression and a poor late outcome. No studies to date have correlated the presence of an intact fibula to pilon fracture outcomes.

Methods:

An IRB approved 7-year retrospective study was performed at three Level I Trauma Centers. Inclusion criteria included all adult patients (>=18) with isolated OTA type B or C pilon fractures from 2008 through 2014. All patients were treated in a staged fashion with initial external fixation by fellowship-trained orthopedic traumatologists. The primary outcome measurement was ankle arthrodesis. Secondary measurements included infection. Binary logistic regression models were used to evaluate the prognostic factors of arthrodesis and infection.

Results:

A total of 239 patients met inclusion criteria for analysis: 33-patients (13.81%) had open injuries, 155 (64.85%) had a C type pilon fracture and 157 fractures (65.69%) presented with an associated fibula fracture. Only 12 patients (5.02%) progressed to ankle arthrodesis. The incidence of fusion in the intact fibula group was 5 (6.10%) similar to that of 7 (4.46%) of patients with an associated fibula fracture. It was found that OTA Type C pilon fractures (OR (95% CI): 6.34 (0.80, 49.98), p=0.08), intact fibulas (OR (95% CI): 1.39 (0.43, 4.53), p=0.58), and open injuries (OR (95% CI): 2.19 (0.56, 8.55), p=0.26) were more likely to result in eventual arthrodesis compared to OTA Type B pilon fractures, fractured fibulas, and closed injuries, respectively.

Conclusion:

The results of this study suggest an adverse relationship for closed complex pilon fractures with an intact fibula. This was especially pronounced in C type injuries in comparison to type B injuries with a 6.34 odds ratio of subsequent fusion. The data approached statistical significance and may have clinical relevance in the decision making and patient counselling for managing these fractures. Pilon fractures historically have had poor outcomes and a higher rate of secondary surgeries which was surprisingly low in our current study. Further study needs to determine if this observation correlates with improved patient outcomes. [Table: see text]
Postoperative Opioid Dependence following Orthopaedic Foot and Ankle Surgery: A Cohort Study of 448 Patients
Authors: Bohl Daniel D. , Hejna Emily , Mehraban Nasima , Lin Johnny L. , Holmes George B. , Lee Simon , Hamid Kamran S.
Published: November 2020

Category:

Other

Introduction/Purpose:

Surgeon prescription of narcotic medications has been identified as a contributor to the nation’s devastating opioid epidemic. The purpose of this study is to identify risk factors for postoperative opioid dependence following orthopaedic foot and ankle surgery.

Methods:

Four hundred and forty-eight patients undergoing orthopaedic foot and ankle surgery at a single institution over a 6- month period were identified. The Illinois Prescription Monitoring Program was used to track opioid prescriptions filled in the preoperative, perioperative, and postoperative periods. Preoperative use was defined as the filling of a prescription during the six months prior to the procedure, excluding the 30 days prior to the procedure. Postoperative dependence was defined as the filling of opioid prescriptions beyond the initial postoperative prescription. Baseline characteristics, including preoperative opioid use, were tested for association with opioid dependence.

Results:

The rate of preoperative opioid use was 20.5%. The rate of postoperative opioid dependence was 31.3%. Patients who used opioids during the preoperative period had the highest risk for postoperative opioid dependence, at 59.6% (RR=2.5, 95% confidence interval = 1.9-3.2, p<0.001; Table 1). Other baseline characteristics associated with postoperative opioid dependence included antiepileptic use (RR=1.8, p=0.001), recreational drug use (RR=1.7, p=0.022), Charlson comorbidity index >= 2 (RR=1.6, p=0.002), benzodiazepine use (RR=1.5, p=0.010), current smoker status (RR=1.5, p<0.001), age >=60 years (RR=1.4, p=0.022), body mass index >= 30 kg/m2 (RR=1.4, p=0.027), antidepressant use (RR=1.4, p=0.050), and <1 drink per week (RR=1.3 p=0.045).

Conclusion:

The single strongest predictor of postoperative opioid dependence was preoperative opioid use, which was associated with more than a doubling in risk. Of note, the chronicity of the foot or ankle condition did not predict postoperative opioid dependence. Preoperative discussion of opiate treatment duration, multimodal pain management strategies and judicious prescription of narcotics should be considered in patients with the above-noted risk factors in an effort to avoid dependence on this potentially addictive and harmful class of medications. [Table: see text]
Routine Fixation of Weber B Fibula Fractures with a Lateral Locking Plate and No Lag Screw
Authors: Bohl Daniel D. , Mehraban Nasima , Foran Ian , Hamid Kamran S.
Published: November 2020

Category:

Ankle

Introduction/Purpose:

The current standard of care for management of an unstable ankle fracture that includes an oblique Weber B fibula fracture is open reduction and internal fixation (ORIF) using a plate and screws to anatomically reduce and compress the fractured fibula. The most popular first-line techniques include either a lag screw with neutralization plate or an anti- glide plate with or without a lag screw through the plate. However, these techniques can be technically challenging in osteoporotic bone or within fibulas of smaller diameter, and in some cases can result in fragmentation at the fracture site. The purpose of this study is to examine an alternative first-line method for routine treatment of Weber B fibula fractures.

Methods:

Fifty-two patients undergoing ORIF of a Weber B fibula fracture by a single surgeon were included in this retrospective study. In every case, reduction and clamping of the fracture was attempted. If successful, a lateral locking plate was slid underneath the clamp(s) and applied with cortical screws proximally and locking screws distally. If clamping was unsuccessful, length/alignment/rotation was achieved by alternative methods (i.e. push-pull technique, use of plate to reduce fracture, etc.), and a lateral locking plate was ultimately applied in a similar manner. No screw crossed the fracture in any case. Per published precedent, nonunion was defined as either a gap of >3mm between fracture surfaces >6 months postoperatively or a fracture line >2-3 mm wide and sclerosing of the fracture surfaces >6 months postoperatively. Similarly, malunion was defined as >=1 of the following: talar tilt >2 degrees, talar subluxation >2 mm, or tibiofibular clear space >=5 mm.

Results:

The mean (+- standard deviation) age of the 52 included patients was 44.2 +- 16.2 years, the mean body mass index was 27.7 +- 6.6 kg/m2, and 63.5% of patients identified themselves as female. The mean follow-up was 6.2 +- 4.4 months. In addition to undergoing fixation of the lateral malleolus, 21 patients also underwent fixation of the posterior malleolus, 27 underwent fixation of the medial malleolus, 29 underwent fixation across the syndesmosis, and seven underwent repair of the deltoid. In all patients, bony anatomic union of the fibula and congruence of the mortise were achieved, with no cases of malunion or nonunion.

Conclusion:

Routine fixation of Weber B fibula fractures with a lateral locking plate and no lag screw is an alternative method to treat Weber B fibula fractures with excellent radiographic results.
Headless vs. Headed Screws Fixation for Calcaneal Osteotomy and Subtalar Arthrodesis: What’s the Cost?
Authors: Boren Morgan , Steginsky Brian D. , Vora Anand M. , Suhling Mallory
Published: November 2020

Category:

Hindfoot; Ankle Arthritis

Introduction/Purpose:

Screw prominence in the heel following calcaneal fixation has resulted in unacceptably high rates of symptomatic hardware and subsequent screw removal. The hardware removal rate following calcaneal screw fixation ranges from 11-50%. We are unaware of any cost analysis comparing headed screw fixation vs. headless screw fixation in the foot and ankle literature. Furthermore, there is no literature comparing the rate of subtalar arthrodesis following headed screw fixation vs. headless screw fixation.

Methods:

CPT codes were used to identify all patients that had a subtalar arthrodesis or displacement calcaneal osteotomy (with screw fixation) performed by a single orthopedic foot and ankle surgeon between 2010 and 2016. The cohort was divided into two groups by the type of screw fixation, 7.0 mm headless screw or 6.7 mm headed screw. Exclusion criteria included <2 years from the index surgery and AVN of the calcaneus or talus. Retrospective chart review was performed to collect demographic data, complications, and cause for screw removal. The primary outcome measure was the rate of symptomatic screw removal. Secondary outcome measure included subtalar arthrodesis as determined by CT or radiographic review. The expense associated with symptomatic hardware removal was determined and cost analysis was performed for the two groups.

Results:

Seventy-six patients underwent headless screw fixation for calcaneal osteotomy or subtalar arthrodesis, and only two patients (2.6%) required symptomatic screw removal. Fifty-four patients underwent headed calcaneal screw fixation, and twelve patients (22.2%) required symptomatic screw removal. Symptomatic hardware removal was performed more frequently in the headed screw group (p< 0.001). There was no difference in the rate of nonunion after subtalar arthrodesis between the two groups (p = 0.363). The calcaneal osteotomy healed in 100% of patients in both groups. The cost associated with isolated screw removal was compared for private insurance and Medicare at an outpatient surgery center. There was a $51,755 cost savings per 100 cases using headless screw fixation compared to headed screw fixation.

Conclusion:

The rate of symptomatic screw removal following calcaneal osteotomy or subtalar arthrodesis is lower with headless screw fixation compared to headed screw fixation. There was no difference in the rate of subtalar union between the two groups as a secondary outcome, but the study was underpowered. Although the headless screw implant is more expensive, cost analysis demonstrates a significant benefit when the expense of hardware removal is considered.
Long Term Functional Outcomes after Total Ankle Arthroplasty
Authors: Brodsky James W. , Scott Daniel J. , Ford Samuel E. , Coleman Scott , Daoud Yahya
Published: November 2020

Category:

Ankle; Ankle Arthritis; Hindfoot

Introduction/Purpose:

In vivo gait analysis is the objective functional measurement compared to subjective patient-reported outcomes. Intermediate-term gait studies showed positive results of Total Ankle Arthroplasty (TAA). To date, there are no published Long-Term functional outcomes of TAA.

Methods:

Three-dimensional gait analysis with twelve-camera digital-motion capture system and double force plates recorded temporal-spatial (TS), kinematic (KM), and kinetic (KN) measures, in 33 patients who had STAR (28) or Salto Talaris (5) TAA, done pre-operatively and at intervals post-operatively, with last testing at a mean of 7.6 years. Almost half the patients had 8-13 year follow up.

Results:

Improvements were found in multiple gait parameters, with TS increases in cadence, (+9.5 steps/min; P <0.001), step length (+4.4 cm; P = 0.001) and walking speed (+0.2 m/s; P<0.001), KM increases in total ROM (+2.0 deg; P = 0.026), plantarflexion at initial contact (+2.7 deg; P=0.004), and maximum plantarflexion (+2.0 deg; P=0.049), and KN analysis showed no loss of ankle power, despite patients’ aging. When examining 15 patients with 8 to 13 year follow-up (mean 10.3 years), there were gains in cadence (+9.8 steps/min, p=0.003), step length (3.6 cm, p=0.024), and walking speed (0.17 m/s, p=0.003), and preservation of the increased sagittal ROM of 2.0 deg. The only difference between prostheses was increased dorsiflexion at initial contact in the STARs vs SALTOs (5.9 degrees, p=0.014).

Conclusion:

This is the first study to report long-term, objective, functional outcomes of TAA, as measured by 3-D digital gait analysis. Even at a decade or more after TAA, patients had sustained improvement in multiple, objective parameters of gait compared to their preoperative function.
Allograft Interposition Bone Graft for First Metatarsal Phalangeal Arthrodesis: Salvage after Bone Loss and Shortening of the First Ray
Authors: Burke John , Shi Glenn G. , Wilke Benjamin , Whalen Joseph L.
Published: November 2020

Category:

Bunion; Midfoot/Forefoot; Other

Introduction/Purpose:

Previous studies have demonstrated success in using autogenous bone graft for arthrodesis in patients with previously failed surgeries of the hallux. These patients have several causes for pain and dysfunction preoperatively, including shortened first ray, nonunions, and poor hallux alignment. In this study, a consecutive series of 36 patients (38 procedures) were treated with a patellar wedge interposition structural allograft to salvage bone loss from great toe arthrodesis malunion, painful joint replacement, failed osteotomy, or infection of the great toe metatarsophalangeal (MP) joint with shortening of the first ray. The goals of the surgery were to restore length to the first ray and provide a stable MP joint fusion to relieve pain.

Methods:

The 38 treated toes were followed for at least one year and were evaluated for preoperative and postoperative American Orthopaedic Foot & Ankle Society (AOFAS) MP scores, subjective patient outcome scores, and clinically successful fusion of the hallux.

Results:

At a minimum one-year follow-up, all but two feet healed with a solid fusion, and all patients reported good or excellent outcomes. AOFAS MP scores averaged 43.5 preoperatively and 77.2 postoperatively. Three patients with infection as cause for nonunion of the initial procedure were treated with staged procedures, including the use of a temporary antibiotic spacer and mini external fixator; all three healed without recurrent infection. One patient had a fracture of her allograft following her interposition arthrodesis, but fused successfully after a second interposition arthrodesis surgery. Two patients developed a nonunion of the revision arthrodesis.

Conclusion:

In conclusion, the use of an interposition patellar wedge allograft can restore length to the first ray and provide successful salvage of arthrodesis nonunions and bone loss from failed hemi and total joint implants of the great toe MP joint. [Table: see text]
Early Outcomes of a Synthetic Cartilage Implant for Treatment of Hallux Rigidus: A Series of 87 Patients
Authors: Campbell Michael A.
Published: November 2020

Category:

Midfoot/Forefoot; Bunion

Introduction/Purpose:

Arthritis of the first metatarsophalangeal joint (MTPJ), or hallux rigidus, is the most common arthritic condition of the foot, affecting 1 in 40 people over 50 years of age. One surgical option is the implantation of a synthetic polyvinyl alcohol hydrogel implant that has water content, tensile strength, and biomechanical properties similar to those of healthy human cartilage. This implant is supported by positive outcomes in a Level 1 clinical trial out to over 5 years follow-up. The objective of this case series was to determine if the positive results seen in the pivotal trial could be recreated in a ‘real world’ setting.

Methods:

All patients implanted with a synthetic cartilage implant by a single surgeon between September 2016 and December 2018 were retrospectively reviewed. Consecutive adult patients diagnosed with hallux rigidus that failed nonoperative treatment were included in the analysis. Patient demographics, complications, Foot and Ankle Ability Measures (FAAM), and a 10-point visual analog score (VAS) were collected from the chart review.

Results:

A total of 87 patients were available for review during the time interval of interest with a mean length of follow-up of 38.7 weeks (range, 2-125). The average patient age was 56.6 years (range, 21-80). Two (2.3%) patients were converted to fusion. The first at 71 weeks and the second at 73 weeks following the initial surgery. Six (6.9%) patients experienced some complications: 3 cases of synovitis treated with corticosteroid injection; 1 case of sesamoiditis; 1 case of neuritis; and 1 insufficiency fracture at the plantar aspect of the MTPJ with implant subsidence. Patients had mean FAAM ADL and VAS scores of 81.2 (range 21-100) and 0.6 (range, 0-3), respectively, at final follow-up.

Conclusion:

This retrospective review is one of the first presentations of outcomes for a synthetic cartilage implant in a ‘real world’ setting. Patients experienced excellent pain relief, good functional outcomes, and a satisfactory survival rate. This case series confirms the positive results seen in the original pivotal trial for this device.
An In Vivo Biomechanical Analysis of Syndesmotic Surgical Repair in Elite Athletes: Screw versus Suture Button Fixation
Authors: Canton Stephen P. , Gale Tom , LaBaze Dukens , Anderst William , Hogan MaCalus V.
Published: November 2020

Category:

Trauma; Basic Sciences/Biologics

Introduction/Purpose:

Syndesmotic injuries account for 1-11% of all ankle sprains and are the most predictive factor of chronic ankle dysfunction 6 months after injury. Common surgical techniques include screw fixation (the ‘gold standard’) and dynamic fixation with a suture button device, which may lead to better clinical outcomes than rigid screw. To date, there are no studies comparing the in vivo biomechanics of suture button and rigid screw syndesmotic fixation, and no report of the correlations between biomechanics and patient outcomes. The goal of this study is to characterize the biomechanics of the native ankle syndesmosis, rigid screw fixation, suture button fixation, along with associated patient-reported outcomes. This study will elucidate mechanisms for improved patient-reported outcomes based on the fixation method.

Methods:

6 patients (average age:23.6, 4M/1F, 2 suture button, 2 screw fixation and 1 hybrid) consented to participate in this IRB-approved study. After being medically cleared to return to full athletic participation, each participant performed seven movements (two single leg hops (straight and lateral), two alternating single-leg push-offs (front-to-back and side-to-side), vertical jumping, running, and walking within a biplane radiographic system (Figure 1). A validated volumetric model-based tracking system matched patient-specific 3D bone models (obtained from CT) to the synchronized biplane radiographs (Figure 1). Six degree of freedom ankle kinematics were determined for each movement and for the repaired and contralateral ankle of each participant. Patient reported outcomes were also measured using the Foot and Ankle Ability Measure (FAAM) and a Visual Analogue Scale (VAS).

Results:

The results show that the screw fixation (-0.99 mm) has greater tibiotalar lateral-medial translation of the injured side relative contralateral healthy side compared to the tightrope fixation (-0.73 mm) and hybrid (.05 mm). For the syndesmosis translation, the screw fixation (2.00 mm) also exhibits greater total magnitude of translation compared to the tightrope ((-0.44 mm) and hybrid fixation (1.02 mm).

Conclusion:

This study shows that the screw fixation exhibits greater translation of the syndemosis and lateral/medial translation of the Talus. This may suggest that this method is inferior to the tight-rope and hybrtid. Future studies will include all the motions and more subjects.
Profile vs Tubular Plate in Unimalleolar or Bimalleolar Fractures: is There a Real Difference in Wound complications?
Authors: Ceccarini Paolo , Petruccelli Rosario , Bisaccia Michele , Rinonapoli Giuseppe , Caraffa Auro
Published: November 2020

Category:

Ankle; Trauma

Introduction/Purpose:

The aim of our study is to compare two types of plates, one third tubular plate and LCP distal fibula plate, evaluating the clinical outcome and the skin complications associated with their use.

Methods:

We collected the data of 122 consecutive unimalleolar or bimalleolar fractures treated by internal fixation for a closed, displaced distal closed fibular fracture. Exclusion criteria were: 1) open ankle fractures,2) trimalleolar fractures, 3) previous ankle fractures 4) severe venous insufficiency, 5) ankleosteoarthritis previous to surgery, 6) associated ankle dislocation. After this selection, 93 patients were included in our study and assigned in two groups, based on using of different implant: in group A48 patients were treated with one-third tubular and in group B 45 patients were treated with LCP distalfibula plate. There were no significant differences in the baseline characteristics. Patients received the same surgical procedure and the same post-operative care, then they were radiologically evaluated at1-3-12 months and clinical examination was made at 24 (range 15-36) months using AOFAS clinical rating system. All data were evaluated using chi-square test.

Results:

At the final 24-month follow-up a comparison between the two groups showed no statistical significant differences in reduction accuracy and bone union ratio at radiological examination. The wound complications rate of the overall study group was 7.6%. There were no statistical differences in the rate of wound complications between the two groups. There were no differences between both group in percentage of hardware removal at follow-up (overall 5.4%). In the group A occurred 1 deep infection, 2 superficial infection, no wound dehiscence; in group B occured 1 deep infection, 1 superficial infection and 2 wound dehiscence. There were no statistical differences in the rate of wound complications between the two groups (p=0.70; Fisher exact test).

Conclusion:

Our study has shown no difference in radiographic bone union rate, no significant differences in terms of clinical outcomes, in time of bone reduction and wound complication rate between the LCP distalfibula plate and conventional one-third tubular plate. RCT or metanalasys are in this case useful to improve scientific evidence and give more information for the correct surgical treatment of ankle fractures.
An Analysis of Orthopaedic Job Availability in the United States Based on Subspecialty
Authors: Chan Jeremy Y. , Charlton Timothy P. , Thordarson David B.
Published: November 2020

Category:

Other

Introduction/Purpose:

Over the past three decades, the number of orthopaedic residency graduates pursuing subspecialty fellowship training has increased to over 90 percent. The percentage of advertised jobs requiring fellowship training has also increased to nearly 70 percent. As such, fellowship training has potential implications for both job availability and marketability. The purpose of this study was to evaluate job availability based on orthopaedic subspecialty in the United States.

Methods:

Job advertisements in 2019 were reviewed from the career center databases of the Journal of Bone and Joint Surgery, American Academy of Orthopaedic Surgeons as well as of individual orthopaedic subspecialty societies. Job listings were cross- referenced between databases to identify unique jobs within the United States, which were categorized by the orthopaedic subspecialty fellowship training required and by practice type (academic, private practice, hospital employed). To assess job availability, a ratio of applicants to job listings was calculated based on the number of matched candidates for nine subspecialty fellowships in 2019.

Results:

A total of 352 unique job listings were identified in 2019. Of the nine orthopaedic subspecialties, job availability was the highest for foot and ankle (1.1 applicants/job), adult reconstruction (2.0), and trauma (2.1). Job availability was lowest for sports medicine (6.3), shoulder and elbow (5.8), and oncology (5.7). (Figure 1) Across all subspecialties, hospital based jobs were most common (46.9%) compared to private practice (36.9%) and academic positions (16.2%). Within the foot and ankle subspecialty, private practice jobs were most common (45.8%) compared to hospital employed (43.8%) and academic positions (10.4%).

Conclusion:

Job availability for new fellowship graduates varies significantly based on orthopaedic subspecialty. At this time, subspecialists trained in foot and ankle, adult reconstruction and trauma appear to be in greatest demand. The reason for the differences in demand is likely multifactorial, but could include changes in population demographics as well as the labor force for individual subspecialties. Our findings have important implications for orthopaedic residents pursuing fellowship training, who must weigh both personal interest and financial considerations in their subspecialty choice.
Distal Chevron Osteotomy Increases Anatomic Intermetatarsal Angle in Hallux Valgus
Authors: Chan Jeremy Y. , Noori Naudereh B. , Chen Stephanie , Pfeffer Glenn B. , Charlton Timothy P. , Thordarson David B.
Published: November 2020

Category:

Bunion; Midfoot/Forefoot

Introduction/Purpose:

Loss of correction in hallux valgus (HV) deformity following distal chevron metatarsal osteotomy (DCO) has been demonstrated in short-term follow-up with HV recurrence rates of up to 75% reported in the long-term. The purpose of this study was to evaluate the radiographic effect of the DCO on the anatomic and mechanical axes of the first metatarsal. Our hypothesis was that patients undergoing DCO would have improvement in the mechanical metatarsal axis but worsening of the anatomic axis.

Methods:

This was a retrospective single surgeon case series of all patients who underwent DCO for HV between 2017 and 2019. Patients were included if they had both preoperative and postoperative weightbearing foot radiographs. The primary outcomes were the change in anatomic first-second intermetatarsal angle (a1-2IMA, defined by the metatarsal diaphyseal axis) and the change in mechanical first-second intermetatarsal angle (m1-2IMA, defined by the axis from the center of the metatarsal head to the metatarsal base). Secondary outcomes included the change in hallux valgus angle (HVA) and medial sesamoid position (medial sesamoid in relation to the mechanical axis of the metatarsal). Change in second-third intermetatarsal angle (2-3IMA, defined by the metatarsal diaphyseal axis) was measured to control for any inconsistencies in radiographic technique. Given the relatively small patient cohort, the non-parametric Wilcoxon signed rank test and Mann Whitney U test were used for statistical analysis.

Results:

41 feet were included for analysis with a mean follow-up of 20.4 weeks. The a1-2IMA increased significantly (mean, 4.0 degrees, p<0.001) while the m1-2IMA decreased significantly (mean, 4.6 degrees, p<0.001) following DCO. There was a significant improvement in HVA (mean, 13.2 degrees, p<0.001). No changes were noted in 2-3IMA (mean, 0.0 degrees, p=0.834). (Table 1) Medial sesamoid position was improved in 22 feet (53.7%). Patients with improved sesamoid position were noted to have a significantly larger decrease in m1-2IMA (mean, 5.3 versus 3.8 degrees, p=0.01) and a smaller increase in a1-2IMA (mean, 3.4 versus 4.7 degrees, p=0.02) compared to patients with no improvement in sesamoid position.

Conclusion:

Distal chevron osteotomy for HV is associated with an increase in the anatomic intermetatarsal angle despite improvements in the m1-2IMA, HVA and medial sesamoid position. Patients with improved sesamoid position were associated with greater correction of the mechanical first metatarsal axis. Our findings may suggest the presence of intermetatarsal instability, which could limit the power of DCO in HV correction for more severe deformities and provide a mechanism for HV recurrence. [Table: see text]
Analysis of 408 Total Ankle Arthroplasty Adverse Events Reported to the US Food and Drug Administration from 2015-2018
Authors: Chen Jie , Akoh Craig C. , Kadakia Rishin J. , Somerson Jeremy S. , Easley Mark E. , Adams Samuel B. , DeOrio James K. , Nunley James A.
Published: November 2020

Category:

Ankle Arthritis

Introduction/Purpose:

Total ankle arthroplasty (TAA) use has increased with newer generation implants. Current reports in the literature regarding complications use data extracted from high-volume centers. The types of complications experienced by less experienced centers may not be reflected in these reports. The purpose of this study was to determine a comprehensive TAA adverse event profile from a mandatory-reporting regulatory database.

Methods:

The US Food and Drug Administration’s Manufacturer and User Facility Device Experience (MAUDE) database was reviewed from 2015-2018 to determine reported adverse events for approved implants. We recorded the type of adverse event and excluded duplicate reports and those extracted from already published literature. We categorized the adverse events into infection, intraoperative guide/jig error, component loosening (tibia or talus), cyst formation, component fracture, gutter impingement/heterotopic ossification, iatrogenic fracture, polyethylene wear, component dissociation, malalignment, malalignment recurrence, direct surgeon error, and miscellaneous. The overall percentage distribution of each of the adverse events failure causes was calculated as was the percentage distribution for each total ankle device.

Results:

Among 408 unique TAA device failures, the modes of failure listed by commonality were component loosening (17.9% [9.6% tibia, 8.3% talus]), intraoperative guide or jig error (15.4%), infection (13.7%), cyst formation (12.7%), gutter impingement/heterotopic ossification (10.3%), component fracture (9.6%), iatrogenic fracture (5.4%), poly wear (3.7%), component dissociation (3.2%), malalignment (2.5%), miscellaneous (2.9%), malalignment recurrence (2.2%), and direct surgeon error (0.5%). These were consistent with some systematic reviews of the literature but in disagreement with others which found high rates of iatrogenic fracture. In addition, the percentage distribution of adverse event failure types differed among implants.

Conclusion:

The MAUDE database is a publicly available method which requires mandatory reporting of approved device adverse events. Using this report, we found general agreement in types of complications reported in the literature, although there were some differences. In addition, intraoperative guide or jig errors were very common and may not have been previously appreciated. This data may more accurately reflect a comprehensive profile of TAA complications as data was taken from a database of all device users rather than only high-volume centers.
Radiographic Measurements on Hindfoot Alignment View in 1,128 Asymptomatic Subjects
Authors: Choi Jun Young , Suh Jin Soo
Published: November 2020

Category:

Hindfoot

Introduction/Purpose:

The primary aim of this study was to calculate the mean values of three most frequently measured parameters for hindfoot alignment determination in asymptomatic subjects - hindfoot alignment angle (HAA), hindfoot alignment ratio (HAR), and hindfoot moment arm (HMA). The secondary aim was to determine the relationship between HAR and HAA or HMA using statistical methods.

Methods:

From January 2014 to June 2019, a total of 1128 asymptomatic subjects were enrolled in this study. With the hindfoot alignment view by Saltzman and el-Khoury, HAA, HAR, and HMA were measured to evaluate the degree of hindfoot varus or valgus deviation. All subjects were divided into subgroups according to sex and age (<45 years old vs >=45 years old). Simple linear regression was performed to draw out the regression formula between HAR and HAA or HMA.

Results:

The mean HAA, HAR, and HMA for all subjects were -4.07+-3.48o, 0.21+-0.15, and -6.12+-5.22 mm, respectively. By comparing subgroups, female subjects >=45 years old showed the largest valgus deviation (-7.08+-6.34o, P=0.001). To predict HAR using HAA or HMA, the regression formulas were ‘HAR= 0.366 + 0.039 × HAA’ and ‘HAR= 0.361 + 0.025 × HMA.’

Conclusion:

Under HAA, HAR, and HMA evaluation, the hindfoot alignment for asymptomatic subjects was valgus deviation. Furthermore, the degree of valgus deviation was the largest in female subjects aged 45 years or older. This can be explained as the progression of adult type flat foot deformity with aging.