Distal Tibiofibular Syndesmosis Injuries in the National Football League (NFL): A Spectrum of Pathology That Correlates With Time to Return to Full Participation.

BACKGROUND: Studies routinely evaluate high ankle sprains in isolation, but recent data suggest that these injuries are often associated with concomitant pathology, potentially influencing return to full participation. HYPOTHESIS: In National Football League (NFL) players, isolated high ankle sprains are rare and syndesmosis injuries with concomitant pathology will result in increased time to return to full participation. STUDY DESIGN: Cross-sectional study. LEVEL OF EVIDENCE: Level 3. METHODS: Distal tibiofibular syndesmosis injuries sustained by NFL players between 2017 and 2019 were identified through NFL Injury Surveillance Database queries and verified with video analysis. Each injury underwent a comprehensive magnetic resonance imaging (MRI) review. Regression modeling was utilized to explore the influence of numerous imaging findings on time to return to full participation. RESULTS: There were 83 external rotation ankle injuries involving the syndesmosis. Isolated distal tibiofibular syndesmosis injuries were rare (n = 11; 13%) and more often associated with other ligamentous injury (deltoid ligament and lateral ligamentous complex) and/or fractures. Regression modeling resulted in clustering of 3 injury pattern groups for time to return to full participation across numerous imaging findings: syndesmosis injury-fracture combinations (250 days [interquartile range [IQR,] 142-266 days]), syndesmosis injury with complete deep deltoid tear or acute diastasis (175 days [IQR, 20-248 days]), and all other syndesmosis injuries (27 days [IQR, 18-46 days]). CONCLUSION: In NFL athletes with external rotation ankle injuries, isolated distal tibiofibular syndesmosis injuries were rare and more often associated with concomitant pathology. Time to return to full participation was affected by an associated fracture and complete deep deltoid ligament tear or diastasis but no other relevant MRI variables such as lateral ligament complex involvement or the presence of osteochondral lesions or bone contusions.

Nitinol, Stainless Steel, and Titanium Kirschner Wire Durability.

Kirschner wires (K wires) are a common fixation device in foot and ankle surgery, particularly in lesser-toe fixation. Fatigue failure is a known complication of this fixation. The material properties of the K wire are a factor in the strength and durability of the wire. The purpose of this study is to compare the durability of K wires made of stainless steel, titanium, and Nitinol. Ten samples each of stainless steel, titanium. and Nitinol underwent cyclic durability testing using a rotating beam approach, and S-N curves (applied stress vs the number of cycles to failure) were generated. The results demonstrate that, generally, Nitinol K wires have a shorter life for the same applied stress than the stainless steel or titanium wires. Titanium had a longer life at low stresses compared with stainless steel, and stainless steel had a longer life at higher stresses. This study provides comparative durability data for K wires made of different metals, which have not been previously reported. Although there was a statistically significant difference in durability for wires used in K wire fixation, all 3 metal types are reasonable choices for temporary K wire fixation.Levels of Evidence: Level 5: Mechanical study.

Locked Dorsal Compression Plate Arthrodesis for Degenerative Arthritis of the Midfoot.

Midfoot arthrodesis is the accepted surgical treatment for symptomatic midfoot arthritis. The published literature has focused on joint-spanning static fixation. Several companies have developed diamond-shaped locked dorsal compression plates, which allow for longitudinal joint compression. After dorsal plate insertion, a spreader device opens the arms of the plate mediolaterally, which allows the plate to compress longitudinally. This work describes outcomes of such locked dorsal compression plates for midfoot arthritis at a single institution. We reviewed 62 patients who underwent midfoot arthrodesis for symptomatic midfoot arthritis using locked dorsal compression plates over a 7-year period. A total of 173 joints were spanned for fusion. The primary outcome measure was radiographic union and visual analog scale pain scores. Characteristics of patients who experienced nonunion versus those who had union were evaluated. Of the 173 joints, there was a 81.5% fusion rate (141/173 joints) and 14 patients experienced nonunion. There was a statistically significant difference in the average number of joints spanned in patients with nonunion (3.6) and patients with union (2.5) (p = .02). Locked dorsal compression plate arthrodesis is a viable technique for achieving midfoot fusion. This mechanical method of compression does not, however, lend itself to improved fusion rates compared with prior reports. A greater number of arthrodesis sites is associated with a higher nonunion rate. Emerging technology using newer materials and improved biomechanical designs may show improved results.

Incidence of Lower Extremity Injury in the National Football League: 2015 to 2018.

BACKGROUND: Lower extremity injuries are the most common injuries in professional sports and carry a high burden to players and teams in the National Football League (NFL). Injury prevention strategies can be refined by a foundational understanding of the occurrence and effect of these injuries on NFL players. PURPOSE: To determine the incidence of specific lower extremity injuries sustained by NFL players across 4 NFL seasons. STUDY DESIGN: Descriptive epidemiology study. METHODS: This retrospective, observational study included all time-loss lower extremity injuries that occurred during football-related activities during the 2015 through 2018 seasons. Injury data were collected prospectively through a leaguewide electronic health record (EHR) system and linked with NFL game statistics and player participation to calculate injury incidence per season and per 10,000 player-plays for lower extremity injuries overall and for specific injuries. Days lost due to injury were estimated through 2018 for injuries occurring in the 2015 to 2017 seasons. RESULTS: An average of 2006 time-loss lower extremity injuries were reported each season over this 4-year study, representing a 1-season risk of 41% for an NFL player. Incidence was stable from 2015 to 2018, with an estimated total missed time burden each NFL season of approximately 56,700 player-days lost. Most (58.7%) of these injuries occurred during games, with an overall higher rate of injuries observed in preseason compared with regular season (11.5 vs 9.4 injuries per 10,000 player-plays in games). The knee was the most commonly injured lower extremity region (29.3% of lower body injuries), followed by the ankle (22.4%), thigh (17.2%), and foot (9.1%). Hamstring strains were the most common lower extremity injury, followed by lateral ankle sprains, adductor strains, high ankle sprains, and medial collateral ligament tears. CONCLUSION: Lower extremity injuries affect a high number of NFL players, and the incidence did not decrease over the 4 seasons studied. Prevention and rehabilitation protocols for these injuries should continue to be prioritized.

Mallet Toes, Hammertoes, Neuromas, and Metatarsophalangeal Joint Instability: 40 Years of Development in Forefoot Surgery.

BACKGROUND: Today's foot and ankle surgeon has an enhanced understanding of forefoot pathology and treatment options compared to surgeons who practiced in previous decades. This paper summarizes developments in forefoot surgery in the past 40 years, specifically in treatments for mallet toe, hammertoe, neuroma, and metatarsophalangeal joint instability. MATERIALS AND METHODS: A review of the literature was conducted using the PubMed search engine, with key terms including, "mallet toe," "hammertoe," "neuroma," "metatarsophalangeal joint instability," "plantar plate," and "forefoot surgery." Chapters in major orthopaedic textbooks covering these topics were also reviewed. We then chronicled the history of the diagnosis and treatment of these pathologies, with a focus on the past 40 years. CONCLUSIONS: There have been major advances in understanding and treating forefoot pathologies in the past four decades; however, there remain areas for improvement both in the diagnosis and treatment of these problems. LEVEL OF EVIDENCE: Level V, meta-synthesis.

Synthetic Turf: History, Design, Maintenance, and Athlete Safety.

CONTEXT:: Synthetic turf has become an increasingly common playing surface for athletics and has changed dramatically since its introduction more than 50 years ago. Along with changes to surface design, maintenance needs and recommendations have become more standardized and attentive both to upkeep and player-level factors. In particular, synthetic turf maintenance as it relates to athlete health and safety is an important consideration at all levels of play. EVIDENCE ACQUISITION:: A literature search of MEDLINE and PubMed for publications between the years 1990 and 2018 was conducted. Keywords included s ynthetic turf, artificial turf, field turf, and playing surface. Additionally, expert opinion through systematic interviews and practical implementation were obtained on synthetic turf design and maintenance practices in the National Football League. STUDY DESIGN:: Clinical review. LEVEL OF EVIDENCE:: Level 5. RESULTS:: Synthetic turf has changed considerably since its inception. Playing surface is a critical component of the athletic environment, playing a role both in performance and in athlete safety. There are several important structural considerations of third-generation synthetic turf systems currently used in the United States that rely heavily on strong and consistent maintenance. A common misconception is that synthetic turf is maintenance free; in fact, however, these surfaces require routine maintenance. Whether athletes experience more injuries on synthetic over natural surfaces is also of interest among various levels and types of sport. CONCLUSION:: Modern synthetic turf is far different than when originally introduced. It requires routine maintenance, even at the level of local athletics. It is important for sports medicine personnel to be familiar with playing surface issues as they are often treating athletes at the time of injury and should maintain a level of awareness of contemporary research and practices regarding the relationships between synthetic turf and injury.

Higher Rates of Lower Extremity Injury on Synthetic Turf Compared With Natural Turf Among National Football League Athletes: Epidemiologic Confirmation of a Biomechanical Hypothesis.

BACKGROUND: Biomechanical studies have shown that synthetic turf surfaces do not release cleats as readily as natural turf, and it has been hypothesized that concomitant increased loading on the foot contributes to the incidence of lower body injuries. This study evaluates this hypothesis from an epidemiologic perspective, examining whether the lower extremity injury rate in National Football League (NFL) games is greater on contemporary synthetic turfs as compared with natural surfaces. HYPOTHESIS: Incidence of lower body injury is higher on synthetic turf than on natural turf among elite NFL athletes playing on modern-generation surfaces. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: Lower extremity injuries reported during 2012-2016 regular season games were included, with all 32 NFL teams reporting injuries under mandated, consistent data collection guidelines. Poisson models were used to construct crude and adjusted incidence rate ratios (IRRs) to estimate the influence of surface type on lower body injury groupings (all lower extremity, knee, ankle/foot) for any injury reported as causing a player to miss football participation as well as injuries resulting in ≥8 days missed. A secondary analysis was performed on noncontact/surface contact injuries. RESULTS: Play on synthetic turf resulted in a 16% increase in lower extremity injuries per play than that on natural turf (IRR, 1.16; 95% CI, 1.10-1.23). This association between synthetic turf and injury remained when injuries were restricted to those that resulted in ≥8 days missed, as well as when categorizations were narrowed to focus on distal injuries anatomically closer to the playing surface (knee, ankle/foot). The higher rate of injury on synthetic turf was notably stronger when injuries were restricted to noncontact/surface contact injuries (IRRs, 1.20-2.03; all statistically significant). CONCLUSION: These results support the biomechanical mechanism hypothesized and add confidence to the conclusion that synthetic turf surfaces have a causal impact on lower extremity injury.

Development of a Footwear Sizing System in the National Football League.

CONTEXT:: Footwear performance and injury mitigation may be compromised if the footwear is not properly sized for an athlete. Additionally, poor fit may result in discomfort and foot injury such as fifth metatarsal stress fracture, foot deformities, turf toe, and blisters. Current footwear fitting methods consist of foot length and width measurements, which may not properly describe the shape of the individual foot, correlated with shoe size descriptors that are not standardized. Footwear manufacturers employ a range of sizing rubrics, which introduces shoe size and shape variability between and even within footwear companies. This article describes the synthesis of literature to inform the development and deployment of an objective footwear fitting system in the National Football League (NFL). The process may inform athletic footwear fitting at other levels of play and in other sports. EVIDENCE ACQUISITION:: Literature related to footwear fitting, sizing, and foot scanning from 1980 through 2017 was compiled using electronic databases. Reference lists of articles were examined for additional relevant studies. Sixty-five sources are included in this descriptive review. STUDY TYPE:: Descriptive review. LEVEL OF EVIDENCE:: Level 5. RESULTS:: Current methods of footwear fitting and variability in the size and shape of athletic footwear complicate proper fitting of footwear to athletes. An objective measurement and recommendation system that can match the 3-dimensional shape of an athlete's foot to the internal shape of available shoe models can provide important guidance for footwear selection. One such system has been deployed in the NFL. CONCLUSION:: An objective footwear fitting system based on 3-dimensional shape matching of feet and shoes can facilitate the selection of footwear that properly fits an athlete's foot.

Evaluation of Midterm Results of the Panta Nail: An Active Compression Tibiotalocalcaneal Arthrodesis Device.

A tibiotalocalcaneal intramedullary rod is a powerful construct often reserved for difficult and salvage cases. The Panta Nail (Integra LifeSciences, Plainsboro, NJ) is a second-generation rod that offers active axial compression compared with previous rod designs. We characterized our experience with this device and identified factors associated with nonunion. We retrospectively identified 19 patients receiving the Panta Nail during a 4-year period with a mean follow-up period of 16 months. We used a consecutive series approach toward inclusion. Fusion, asymptomatic fibrous union, or nonunion was determined for each ankle and subtalar joint as the primary endpoint. Patients were grouped as follows: group A, successful outcome; group B, successful outcome after dynamization; group C, no successful outcome. Secondary data were tested for association with the probability of first-attempt fusion. The Panta Nail resulted in a first-attempt fusion rate of 65% at the ankle and subtalar joints. With implementation of dynamization (31% of cases) at an average of 28 weeks after insertion (groups A and B), the bony fusion rate was 88% and 77% at the ankle and subtalar joint, respectively. Inclusion of 3 asymptomatic fibrous unions with final visual analog scale scores <4 (1 ankle; 2 subtalar) as successful outcomes resulted in 94% and 88% success rates for the ankle and subtalar joints (groups A and B). Salvaged total ankle arthroplasties with the Panta Nail device as a subgroup had an 83% fusion rate, with a 50% dynamization rate. No predictors of nonunion were found. The Panta Nail is a second-generation tibiotalocalcaneal arthrodesis device capable of providing good success rates for fusion. Also, dynamization is an appropriate and frequent augmentation method.

The Athletic Shoe in Football.

BACKGROUND: Foot and ankle injuries are common in sports, particularly in cleated athletes. Traditionally, the athletic shoe has not been regarded as a piece of protective equipment but rather as a part of the uniform, with a primary focus on performance and subjective feedback measures of comfort. Changes in turf and shoe design have poorly understood implications on the health and safety of players. EVIDENCE ACQUISITION: A literature search of the MEDLINE and PubMed databases was conducted. Keywords included athletic shoewear, cleated shoe, football shoes, and shoewear, and search parameters were between the years 2000 and 2016. STUDY DESIGN: Clinical review. LEVEL OF EVIDENCE: Level 5. RESULTS: The athletic shoe is an important piece of protective sports equipment. There are several important structural considerations of shoe design, including biomechanical compliance, cleat and turf interaction, and shoe sizing/fit, that affect the way an athlete engages with the playing surface and carry important potential implications regarding player safety if not understood and addressed. CONCLUSION: Athletic footwear should be considered an integral piece of protective equipment rather than simply an extension of the uniform apparel. More research is needed to define optimal shoe sizing, the effect that design has on mechanical load, and how cleat properties, including pattern and structure, interact with the variety of playing surfaces.

Ankle Arthrodesis Using an Anterior Titanium Dual Locked Plating Construct.

Ankle arthrodesis is currently the reference standard treatment for end-stage tibiotalar arthrosis. The fusion rates have varied in the published data from 59% to 100%. We reviewed 60 cases of consecutive anterior ankle arthrodesis using an anterior dual locked plating construct with respect to the fusion rate, time to fusion, pain relief, and complications. The patients were followed up for a mean of 1.1 years (range 16 weeks to 4 years). We found that our fusion rate was 97% for ankles not requiring structural allograft. The mean interval to fusion was 11.7 weeks, excluding those with a structural allograft. The mean visual analog scale pain scores decreased from 7 preoperatively to 2 at the final follow-up visit. Anterior ankle arthrodesis with dual locked plating provides excellent results with respect to the fusion rate with a low complication rate.

Plantar Plate Repair for Lesser Metatarsophalangeal Joint Instability.

BACKGROUND: Lesser metatarsophalangeal (MTP) joint instability is a common cause of forefoot pain. Advances in operative technique and instrumentation have made it possible to anatomically treat plantar plate tears through a dorsal approach. Our goal was to evaluate the subjective, functional, and radiographic outcomes of plantar plate repair (PPR) from a dorsal approach. METHODS: A prospective case series was performed evaluating the results of PPR in 97 feet with 138 plantar plate tears. Patients underwent PPR from a dorsal approach with a Weil osteotomy. We followed patients at regular intervals for 12 months and collected data preoperatively and postoperatively with respect to visual analog scale (VAS) scores, MTP range of motion (ROM), paper pull-out test, American Orthopaedic Foot & Ankle Society (AOFAS) scores, satisfaction, and radiographic measures. RESULTS: Eighty percent of patients scored "good" to "excellent" satisfaction scores at 12 months. The mean VAS pain score preoperatively was 5.4/10, and postoperatively was 1.5/10. The mean AOFAS scores increased from 49 to 81 points following surgery. The mean MTP ROM preoperatively was 43 degrees and postoperatively 31 degrees. Forty-two percent of toes passed the paper pull out test prior to surgery and 54% at 12 months. Mean metatarsal shortening was 2.4/3.1/1.2 mm for the second, third, and fourth metatarsals, respectively. The mean MTP joint angles preoperatively were 2/4.9/-1.3 degrees and postoperatively were 7.4/9.6/0.2 degrees, respectively, for the second, third, and fourth MTP joints. CONCLUSION: We found that the plantar plate could be repaired through a dorsal approach with reliable outcomes. PPR was a viable option to anatomically restore the ligamentous support in the unstable lesser MTP joint. LEVEL OF EVIDENCE: Level IV, retrospective case series.

Biomechanical Evaluation of Strength and Stiffness of Subtalar Joint Arthrodesis Screw Constructs.

BACKGROUND: Subtalar arthrodesis is a common treatment for end-stage subtalar joint arthritis as well as many other clinical problems. The best method of subtalar arthrodesis fixation is unknown. The purpose of this study was to compare the strength of subtalar arthrodesis fixation methods including a single posterior screw (SP), 2 posterior minimally divergent screws (MD) and a 2 screw highly divergent screw (HD) construct for subtalar arthrodesis. METHODS: A biomechanical study was performed including the three different screw configurations (SP, MD, HD). These surrogate bone specimens were subjected to applied inversion and eversion torques about the subtalar joint axis on a servo-hydraulic load frame. Torsional stiffness of the construct and the maximum torque for each configuration were measured. Additionally, a cadaver study was performed using 5 fresh-frozen cadaver specimens. The perpendicular distance from the divergent screw guide-wire placement was measured from anatomic structures. RESULTS: The HD screw configuration was found to have the highest torsional stiffness in both inversion and eversion, followed by the MD construct and then the SP construct. Similarly, the HD construct had the highest maximum torque versus the MD and SP constructs. All between-group differences were statistically significant (P < .05). The mean distance from key structures to the divergent screw included the sural nerve (13 mm), peroneus brevis tendon (18 mm), tibialis anterior tendon (8 mm), and tibialis posterior tendon (21 mm). CONCLUSION: This biomechanical and cadaver study supports the use of 2 screws for fixation of subtalar arthrodesis over a single posterior screw. Additionally, we describe a biomechanically superior and potentially safe, alternative 2-screw divergent construct. CLINICAL RELEVANCE: This study gives biomechanical support for 2 screw, divergent fixation of subtalar arthrodesis or a single over a single screw or two screw minimally divergent construct.

Fibrous Tendon Hypertrophy after Gastrocnemius Recession: A Case Report.

Surgical complications after gastrocnemius recession have been rare in published studies. We report a case of symptomatic fibrous tendon hypertrophy requiring revision surgery. Additionally, we have provided a review of the published data on the complications related to this procedure.

Low-Level Laser Therapy at 635 nm for Treatment of Chronic Plantar Fasciitis: A Placebo-Controlled, Randomized Study.

Plantar fasciitis affects nearly 1 million persons in the United States at any one time. Conservative therapies have been reported to successfully treat 90% of plantar fasciitis cases; however, for the remaining cases, only invasive therapeutic solutions remain. This investigation studied newly emerging technology, low-level laser therapy. From September 2011 to June 2013, 69 subjects were enrolled in a placebo-controlled, randomized, double-blind, multicenter study that evaluated the clinical utility of low-level laser therapy for the treatment of unilateral chronic fasciitis. The volunteer participants were treated twice a week for 3 weeks for a total of 6 treatments and were evaluated at 5 separate time points: before the procedure and at weeks 1, 2, 3, 6, and 8. The pain rating was recorded using a visual analog scale, with 0 representing "no pain" and 100 representing "worst pain." Additionally, Doppler ultrasonography was performed on the plantar fascia to measure the fascial thickness before and after treatment. Study participants also completed the Foot Function Index. At the final follow-up visit, the group participants demonstrated a mean improvement in heel pain with a visual analog scale score of 29.6 ± 24.9 compared with the placebo subjects, who reported a mean improvement of 5.4 ± 16.0, a statistically significant difference (p < .001). Although additional studies are warranted, these data have demonstrated that low-level laser therapy is a promising treatment of plantar fasciitis.

Exposure via sequential release of the metatarsophalangeal joint for plantar plate repair through a dorsal approach without an intraarticular osteotomy.

BACKGROUND: Traditionally, plantar plate repairs have been performed from either a direct plantar approach or through a dorsal approach utilizing an intraarticular metatarsal osteotomy. It is unknown if a plantar plate repair can be reliably performed through a dorsal approach without an osteotomy. METHODS: The second through fourth metatarsal phalangeal (MTP) joints of 4 fresh frozen cadavers were sequentially dissected and the exposure of the plantar plate was quantified with a digital micrometer. A suture passer was then utilized to pass a suture through the released plantar plate without a metatarsal osteotomy. RESULTS: The mean plantar plate exposure after capsulotomy was 1.1 mm, after capsulotomy and release of the collateral ligaments exposure was 2.5 mm, after the addition of a release of plantar structures with a McGlamry elevator exposure was 4.1 mm, and after the addition of a plantar plate takedown the exposure was 5.3 mm. Every specimen had a minimum of 4 mm of exposure. Two sutures were successfully passed through every plantar plate with the exposure obtained. CONCLUSION: Significant improvement in exposure of the plantar plate was achieved with each successive structure released . CLINICAL RELEVANCE: Successful plantar plate repair can be reliably performed through a dorsal approach without a metatarsal osteotomy in a cadaveric model.

Long-term follow-up of mobile bearing total ankle arthroplasty in the United States.

BACKGROUND: The published long-term follow-up of modern total ankle arthroplasty is limited. We report results after a minimum of 10-year follow-up in a cohort of patients who underwent the Scandinavian Total Ankle Replacement (STAR™) in the United States. METHODS: Between 1998 and 2003, 18 patients underwent total ankle arthroplasty for end-stage ankle degeneration and were available for follow-up at a minimum of 10 years postoperatively out of a consecutive series of 41 patients. All surgeries were performed by a single surgeon at a single institution. Clinical, radiographic, and functional examinations were performed. Revision was defined as failure of either the tibial or the talar metallic component. The mean length of follow-up was 12.6 years (range, 10.2 to 14.6). RESULTS: Overall implant survival was 94.4% (17/18). A total of 39% (7/18) required additional surgical procedures, most of which were performed greater than 9 years postoperatively, and 1 required a revision of the prosthesis. Preoperative VAS pain scale scores improved from 8.1 to 2.1 out of 10 at latest follow-up. Mean Buechel-Pappas Scale scores improved from 32.8 to 82.1 and mean AOFAS Ankle-Hindfoot Scale scores improved from 32.8 to 78.1 at latest follow-up. All patients reported their outcome as good or excellent. CONCLUSION: In the current cohort of STAR ankle patients, implant survival, patient satisfaction, pain relief, and function were high. However, the rate of additional procedures was also high, which highlights the need for patient follow-up and additional long-term outcome studies on total ankle arthroplasty. LEVEL OF EVIDENCE: Level IV, cohort study.

Performance of total ankle arthroplasty and ankle arthrodesis on uneven surfaces, stairs, and inclines: a prospective study.

BACKGROUND: Both total ankle arthroplasty (TAA) and ankle arthrodesis are options for the treatment of ankle arthritis and have been shown to improve gait postoperatively. Little is known about the postoperative performance of these patients on uneven surfaces. METHODS: Between 2010 and 2013, 77 consecutive patients were enrolled in a prospective study and completed 12 months of follow-up. Patients received either a TAA (61 patients) or an ankle arthrodesis (16 patients). Preoperatively, at 6 months and 12 months postoperatively, patients were evaluated clinically and functionally on stairs, an inclined ramp, and an uneven surface. Patients graded their function on these surfaces using a visual analog scale (VAS) in addition to standard clinical grading scales. RESULTS: There was no statistically significant difference between the patient groups preoperatively (all P > .05). Both TAA and ankle arthrodesis groups had high patient satisfaction, 3.5 and 3.4 out of 4.0, respectively. Both groups had improvement in Buechel-Pappas scores, VAS pain scores, AOFAS Ankle Hindfoot scores, and functional scores (all P values < .05). TAA patients had a significantly better outcome than the arthrodesis patients in the Buechel-Pappas scale (P = .036), AOFAS Ankle Hindfoot score (P = .03), ankle dorsiflexion (P < .001), ankle plantarflexion (P < .001), walking upstairs (P = .013), walking downstairs (P = .012), and walking uphill (P = .016). CONCLUSIONS: Patients with TAA and ankle arthrodesis had improved performance walking on uneven surfaces at 12 months of follow-up compared to preoperatively. TAA patients had higher scores than the ankle arthrodesis patients walking upstairs, downstairs, and uphill. LEVEL OF EVIDENCE: Level II, prospective cohort study.

Hindfoot deformity and calcaneal tuberosity osteotomies.

UNLABELLED: Calcaneal tuberosity osteotomies are commonly used to treat coronal plane deformities of the hindfoot. Assessing hindfoot alignment can be difficult and there is little evidence to guide the physician when considering the surgical treatment of these deformities. The indications for a calcaneal osteotomy are unclear in the literature because most of the published studies supporting their use are confounded by concurrent procedures such as in adult-acquired flatfoot correction or cavovarus reconstruction. For the same reason, the biomechanical consequences, long-term effects, and performance in vivo are largely unknown. LEVEL OF EVIDENCE: Expert opinion, Level V.

Etiology and management of lesser toe metatarsophalangeal joint instability.

The terms crossover toe and lesser metatarsophalangeal joint instability both describe a deterioration of the soft tissue structures that give stability to the lesser MTP joints. Initial treatment regimens focused on indirect repair of the instability without addressing the primary pathology. A staging system of the clinical examination and a grading system of the surgical findings are now available to help surgeons classify and treat the plantar plate insufficiency. Improved imaging techniques and direct surgical repair techniques through a dorsal approach have changed the treatment and possibly the results of this difficult condition.