bluuebunny/crossref_metadata_2025 huggingface dataset:
Ankle Arthrodesis with a Retrograde Femoral Nail for Charcot Ankle Arthropathy
Authors: Pinzur Michael S. , Noonan Timothy
Published: January 2017

Background: Tibiocalcaneal arthrodesis with retrograde intramedullary nailing has gained acceptance as a salvage procedure for a multitude of ankle and hindfoot disorders and is frequently used in Charcot arthropathy of the ankle. Because of the severe osteopenia often associated with Charcot arthropathy of the ankle, an area of stress concentration leading to stress fracture at the proximal aspect of the nail has been identified. Methods: To determine if this potential complication can be avoided, nine consecutive diabetic individuals with Charcot arthropathy of the ankle had ankle arthrodesis with a longer retrograde femoral nail. The average age of the patients was 52.3 years. Their average weight was 102.6 kg. Results: Fusion was evident on radiographs in all nine patients at an average of 10.5 weeks. None of the patients developed a stress fracture or evidence of stress concentration at the proximal metaphyseal tip of the nails. One wound infection resolved after debridement and antibiotic therapy, and one postoperative hematoma resolved without surgery. At an average 32-month followup, all patients were ambulatory, using commercially available therapeutic footwear. None had developed a new foot ulcer, infection, or new episode of Charcot arthropathy. Conclusions: The use of a retrograde femoral nail for ankle arthrodesis in patients with Charcot arthropathy appears to decrease the risk of stress fracture compared with shorter nails without increasing the risk of other complications.
Plantar Forefoot Pressure Changes After Second Metatarsal Neck Osteotomy
Authors: Khalafi Afshin , Landsman Adam S. , Lautenschlager Eugene P. , Kelikian Armen S.
Published: January 2017

Background: The aim of this study was to evaluate plantar pressure changes after second metatarsal neck osteotomy using the Weil technique. Methods: Six below-knee cadaver specimens were used. Each specimen was held in a custom-built apparatus and loaded to 500 N for a period of 3 seconds. Using a computerized Musgrave pedobarograph, pressure measurements were made before and after osteotomy in both neutral and 45-degree heel rise positions. All osteotomies were made at an angle of approximately 20 degrees relative to the long axis of the metatarsal shaft. The metatarsal heads were displaced proximally by 5 mm and fixed with a single Kirschner wire. Results: After osteotomy there was an average decrease in pressure beneath the second metatarsal from 70.6 to 45.1 kPa in neutral and from 813.0 to 281.4 kPa in heel rise, representing statistically significant ( p ≤ 0.05) decreases of 36% and 65%, respectively. There also were significant decreases beneath the third metatarsal in both neutral (39%) and heel rise (37%), and beneath the fourth metatarsal in neutral position (28%). A significant pressure increase occurred beneath the first metatarsal in neutral (23%). No significant pressure changes occurred under the fifth metatarsal in either position. Conclusion: Overall, our results indicated that the Weil metatarsal neck osteotomy is effective at offloading the second metatarsal head at neutral and heel rise positions.
An Outcome Study of Chronic Achilles Tendinosis After Excision of the Achilles Tendon and Flexor Hallucis Longus Tendon Transfer
Authors: Martin RobRoy L. , Manning Christopher M. , Carcia Christopher R. , Conti Stephen F.
Published: January 2017

Background: A number of operative techniques, including decompression with debridement and flexor hallucis longus (FHL) tendon augmentation, have been described for chronic degenerative Achilles tendinosis. Decompression with debridement has been shown to be effective; however, pain and functional limitation can persist in individuals with more severe tendon involvement. Augmentation with the FHL tendon can add mechanical support; however, difficulty in achieving proper tendon tensioning and the potential to leave behind painful diseased tendon are disadvantages of the technique. The purpose of this study was to present the results of a modified technique in which the Achilles tendon is completely excised and the FHL tendon is transferred. Methods: Fifty-six surgeries using this modified technique were done between October, 1994, and March, 2002, for patients with chronic degenerative Achilles tendinosis. Forty-four patients with and average age of 58.2 (SD 10.1) years and an average time of followup of 3.4 (SD 1.9) years were available for testing. All subjects were mailed a packet of standardized questionnaire information that included the Self-Reported Health Related Quality of Life measures Short Form (SF-36) and the subjective component of the American Orthopaedic Foot and Ankle Society (AOFAS) Ankle and Hindfoot Score. Nineteen patients returned to the clinic for objective assessment. Statistical analysis tested for a difference in the SF-36 scores between our subjects and the general United States population and for a difference in strength and range of motion between the involved and uninvolved lower extremities. Results: Pain decreased in 95.5% ( n = 42) patients, and 86.4% ( n = 38) patients were satisfied with the result. There was no significant difference ( p >.05) between the SF-36 scores obtained by our sample compared to the general United States population. The average AOFAS score for the 19 patients was 91.6 (SD 7.7). Dorsiflexion range of motion was not significantly different ( p = 0.17); however, significant deficits were found in plantarflexion range of motion ( p = 0.001) and plantarflexion strength ( p < 0.025). Strength deficits were 30% on average; however, all but one patient could do a heel raise. Conclusion: Complete Achilles tendon excision reduces pain while preserving functional status. Although strength deficits persisted, these deficits did not seem to affect the functional status in this sample of patients.
Reliability of AOFAS Diabetic Foot Questionnaire in Charcot Arthropathy: Stability, Internal Consistency, and Measurable Difference
Authors: Dhawan Vibhu , Spratt Kevin F. , Pinzur Michael S. , Baumhauer Judith , Rudicel Sally , Saltzman Charles L.
Published: January 2017

Background: The development of Charcot changes is known to be associated with a high rate of recurrent ulceration and amputation. Unfortunately, the effect of Charcot arthropathy on quality of life in diabetic patients has not been systematically studied because of a lack of a disease-specific instrument. The purpose of this study was to develop and test an instrument to evaluate the health-related quality of life of diabetic foot disease. Methods: Subjects diagnosed with Charcot arthropathy completed a patient self-administered questionnaire, and clinicians completed an accompanying observational survey. The patient self-administered questionnaire was organized into five general sections: demographics, general health, diabetes-related symptoms, comorbidities, and satisfaction. The scales measured the effect in six health domains: 1) general health, 2) care, 3) worry, 4) sleep, 5) emotion, and 6) physicality. The psychometric properties of the scales were evaluated and the summary scores for the Short-Form Health Survey (SF-36) were compared to published norms for other major medical illnesses. Results: Of the 89 enrolled patients, 57 who completed the questionnaire on enrollment returned a second completed form at 3-month followup. Over the 3-month followup period most of the patients showed an improvement in the Eichenholtz staging. The internal consistency of most was moderate to high and, in general, the scale scores were stable over 3 months. However, several of the scales suffered from low-ceiling or high-floor effects. Patients with Charcot arthropathy had a much lower physical component score on enrollment than the reported norms for other disease conditions, including diabetes. Conclusions: Quality of life represents an important set of outcomes when evaluating the effectiveness of treatment for patients with Charcot arthropathy. This study represents an initial attempt to develop a standardized survey for use with this patient population. Further studies need to be done with larger groups of patients to refine the tool and to begin the validation process. The instrument developed could be used for comparing treatment strategies for Charcot arthropathy.
Arthrodesis of the First Metatarsophalangeal Joint for Idiopathic Hallux Valgus: Intermediate Results
Authors: Coughlin Michael J. , Grebing Brett R. , Jones Carroll P.
Published: January 2017

Background: Followup studies documenting the outcome of primary metatarsophalangeal (MTP) joint arthrodesis for treatment of hallux valgus deformities are rare. The purpose of this report was to evaluate the results of first MTP joint arthrodesis as treatment for moderate and severe hallux valgus deformities over a 22-year period in a single surgeon's practice. Methods: All living patients treated between 1979 and 2001, for moderate and severe idiopathic hallux valgus deformities with first MTP joint arthrodesis were contacted and asked to return for a followup examination. Outcomes were assessed by comparing preoperative and postoperative pain, function, and radiographic appearance. First ray mobility and ligamentous laxity also were assessed postoperatively. Results: Eighteen of 21 of the first MTP joints had successfully fused with the primary procedure at an average followup of 8.2 years (range 24 to 271 months). The time to union averaged 10 (range 7 to 15) weeks. Two of the three nonunions, both in the same patient, were asymptomatic and were not revised. One required a revision to achieve fusion. The average corrections in the hallux valgus angle and 1–2 intermetatarsal (IM) angle were 21 degrees and 6 degrees, respectively, and the average postoperative dorsiflexion angle was 22 degrees. Subjective satisfaction was rated as excellent in seventeen of 21 cases (80%) and good in the remaining four (20%). There was significant reduction in postoperative pain ( p < 0.001), complete resolution of lateral metatarsalgia, and the postoperative American Orthopaedic Foot and Ankle Society (AOFAS) scores averaged 84 (range 72 to 90) at final followup. Major activity restrictions after surgery were uncommon, and all patients were able to wear conventional or comfort shoes. Interphalangeal (IP) joint arthritis progressed in seven of 21 feet (33%), but all of these changes were mild. Conclusions: In the present study, arthrodesis of the first MTP joint for idiopathic hallux valgus resulted in a high percentage of successful results at an average followup of over 8 years.
Fresh Ankle Osteochondral Allograft Transplantation for Tibiotalar Joint Arthritis
Authors: Meehan Robert , McFarlin Sarah , Bugbee William , Brage Michael
Published: January 2017

Background: Conventional treatment for tibiotalar joint arthritis relies on arthrodesis or prosthetic arthroplasty. Fresh osteochondral allografting is an alternative procedure to replace diseased articular cartilage. Methods: Eleven patients (average age 43 years; range 18 to 65 years) had fresh osteochondral grafting of the tibiotalar joint. The diagnoses were posttraumatic arthritis in seven ankles, osteoarthritis in two, and an osteochondral defect in two. Precise cuts were made using the Agility® (DePuy, Warsaw IN) ankle arthroplasty jigs. Bipolar replacements were used in nine ankles and unipolar in two. Results were evaluated using outcome scores, physical examinations, and standing ankle radiographs. Results: At a minimum followup of 24 (average 33; range 26 to 45) months, six of the 11 ankles had successful grafting procedures. The average AOFAS score preoperatively improved from 55 to 73 postoperatively ( p = 0.01). The patients' pain, gait, and walking surface scores were all significantly improved ( p < 0.05). Of the five failures three underwent successful repeat allografting and one was revised to a total ankle arthroplasty, and one has had no further surgery. The ankle range of motion arc was 30 degrees or more in six ankles. Additional surgery included five talofibular joint debridements, three repeat graftings, two hardware removals, and one conversion to a prosthetic ankle replacement. There was one intraoperative fibular fracture and one superficial wound infection. The serum of 10 patients tested positive for cytotoxic HLA antibodies postoperatively. Radiographs revealed moderate and severe joint degeneration in six ankles; however, this did not necessarily correlate with a poor outcome. Poor results tended to occur in ankles with a graft-host size mismatch or graft thickness of less than 7 mm. Conclusion: Fresh osteochondral transplantation for tibiotalar joint arthritis is a promising alternative to arthrodesis and prosthetic replacement. Early results demonstrate successful outcomes and good pain relief in over half the patients in this series.
Evaluation of Hallux Alignment and Functional Outcome after Isolated Tibial Sesamoidectomy
Authors: Lee Simon , James William C. , Cohen Bruce E. , Davis W. Hodges , Anderson Robert B.
Published: January 2017

Background: Functional loss and clinical evidence of hallux malalignment have been reported to follow isolated tibial sesamoidectomy. Methods: Thirty-two patients with isolated tibial sesamoidectomies were identified. Patients with a diagnosis of peripheral neuropathy, diabetes mellitus, inflammatory arthropathy or previous foot surgery were excluded as were patients who had concomitant joint realignment procedures. Twenty patients were available for followup with the Short Form-36 (SF-36), Foot Function Index (FFI) disability scale, visual analog scale (VAS), and questionnaire at an average of 62 (range 10 to 157) months after surgery. Fourteen patients returned for physical examination, radiographs, and pedographic and isokinetic examination. Results: Physical examination of the 14 patients did not reveal any significant change in clinical alignment, range of motion or tenderness. Preoperative and postoperative comparison radiographs did not reveal significant differences in the intermetatarsal (IM) angle, hallux valgus (HV) angle distal metatarsal articular angle (DMAA), or sesamoid alignment (sesamoid station). Postoperative outcome measurements (VAS, SF36, and FFI) for 20 patients found significant relief of pain and improved functional outcome. Computerized dynamic pedographic measurements (Performance Orthotic) for 12 patients did not reveal any altered plantar pressures in the region of the hallux metatarsophalangeal joint. Isokinetic measurements of ankle plantar flexion push-off strength in eight patients did not reveal significant differences in side-to-side measurements. Eighteen of 20 (90%) patients indicated that they were able to resume all preoperative activities; six (30%) had extreme difficulty or an inability to stand on tip toe, but this did not impact their activities of daily living or their athletic endeavors. Two patients (14.3%) developed transfer metatarsalgia, but only one was symptomatic. Conclusion: Isolated tibial sesamoidectomy is a safe and effective treatment for recalcitrant tibial sesamoiditis. Hallux malalignment and deformity resulting in functional loss and change in hallux alignment can be avoided by meticulous surgical technique with repair of the soft tissues.
Tibiotalocalcaneal (Hindfoot) Arthrodesis by Retrograde Intramedullary Nailing Using a Curved Locking Nail. The Results of 52 Procedures
Authors: Hammett Rodney , Hepple Steve , Forster Ben , Winson Ian
Published: January 2017

Background: The purpose of this study was to report the results of 52 combined subtalar and ankle arthrodesis using an intramedullary nail. Methods: Retrospective review identified 49 patients who had 52 combined ankle and subtalar arthrodeses with an ACE® retrograde locked intramedullary humeral nail (DePuy-Ace®, Warsaw, IN). Most procedures included bone grafts from the fibula, proximal tibia, or iliac crest or femoral head allograft. Intraoperative complications included one fractured tibia and one fractured medial malleolus. The procedure was done mainly for the treatment of combined ankle and subtalar arthritis (31) or complex hindfoot deformities (12). Outcome was assessed by a combination of chart review, clinical examination, and telephone questionnaire. Followup averaged 34 (8 to 73) months. Results: At followup 82% of patients were satisfied with the results of surgery, 82% reported improvements in pain levels, and 67% reported improved foot function. The average postoperative American Orthopaedic Foot and Ankle Society (AOFAS) hindfoot score was 63. Postoperative complications included deep infection, amputation, stress fracture, nonunion, and prominent hardware. Conclusion: Hindfoot arthrodesis with intramedullary nailing is an effective technique for treating complex foot deformities and often is the only alternative to amputation. Patient satisfaction is high, but the procedure is demanding and complications are frequent.
Exogenously Administered Substance P and Neutral Endopeptidase Inhibitors Stimulate Fibroblast Proliferation, Angiogenesis and Collagen Organization during Achilles Tendon Healing
Authors: Burssens Peter , Steyaert Adelheid , Forsyth Ramses , van Ovost Edwin Johan , De Paepe Yves , Verdonk Rene
Published: January 2017

Background: In the last few years much research has been conducted in methods to promote tendon healing. The aim of this study was to determine if the healing process after operative repair of rat Achilles tendons could be stimulated by the paratendinous injection of a sensory peptide, substance P (SP). Methods: Ninety-six male Sprague-Dawley rats were randomly allocated to four groups: (I) control buffer injections, (II) injections of SP 10−6 mol/kg body weight combined with a carrier, (III) injections of SP 10−8 mol/kg BW with the carrier, and (IV) injections with the carrier only (thiorphan 1 μmol/kg BW and captopril 30 μmol/kg BW, both neutral endopeptidase inhibitors). The influence on tissue repair was determined from the histologic measurement of fibroblast proliferation, angiogenesis, and collagen organization. On days 7, 14, 28 and 42, animals were sacrificed and histologic evaluations were performed on the injured Achilles tendon constructs. Results: The two groups subjected to SP injections showed a significant initial fibroblast proliferation on day 7 ( p < 0.05), which rapidly declined by day 14 to the level of cellular proliferation observed with the use of thiorphan and captopril. Capillary proliferation showed a similar evolution, except that in the second week angiogenesis in the treated groups was below the level of the control group. Strikingly, collagen orientation increased faster in the groups injected with SP. This was obvious from the second week already and the difference remained until the completion of the study. Conclusion: This is the first study to demonstrate that paratendinous injections of SP after operative repair of the Achilles tendon in rats appears to provide a boost to the initial stages of healing and significantly accelerate the reparative phase of the healing process.
Plantar-to-Dorsal Compared to Dorsal-to-Plantar Screw Fixation for Proximal Chevron Osteotomy: A Biomechanical Analysis
Authors: Sharma Krishn M. , Parks Brent G. , Nguyen Augustine , Schon Lew C.
Published: January 2017

Background: A change in screw orientation in fixing the chevron proximal first metatarsal osteotomy was noted anecdotally to improve fixation strength. The authors hypothesized that plantar-to-dorsal screw orientation would be more stable than the conventional dorsal-to-plantar screw orientation for fixation of the chevron osteotomy. The purpose of this study was to determine if the load-to-failure and stiffness of the chevron type proximal first metatarsal osteotomy stabilized using plantar-to-dorsal screw fixation were greater than with the more conventional dorsal-to-plantar screw fixation method. Methods: One foot from each of eight matched cadaver pairs was randomly assigned to one of two groups: 1) fixation with a dorsal-to-plantar lag screw or 2) fixation with a plantar-to-dorsal lag screw. A proximal chevron osteotomy was then created using standard technique and the metatarsal was fixed according to previously established method. The bone was potted in polyester resin, and the construct was fitted into a materials testing system machine in which load was applied to the plantar aspect of the metatarsal until failure. The two groups were compared using a two-tailed Student t test. Results: The average load-to-failure and stiffness of the chevron osteotomy fixed with the plantar-to-dorsal lag screw were significantly greater ( p < 0.05) than the group fixed with more conventional dorsal-to-plantar lag screws. Conclusion: Plantar-to-dorsal screw orientation was more stable than the conventional dorsal-to-plantar screw orientation for fixation of the proximal chevron osteotomy. Plantar-to-dorsal screw orientation should be considered when using the chevron proximal first metatarsal osteotomy.
Assessment of Plantar Pressure in Forefoot Relief Shoes of Different Designs
Authors: Carl Hans-Dieter , Pfander David , Swoboda Bernd
Published: January 2017

Background: After reconstructive forefoot surgery, patients require complete or partial forefoot relief, which can be obtained with a variety of shoe designs. The aim of this study was to evaluate the effectiveness of two different types of forefoot-relief shoes frequently used after surgery, especially their safety against unintentional forefoot load. Methods: Ten healthy volunteers were asked to perform five trials on a treadmill at self-selected speeds. In the first trial, mean peak pressure values in mass-produced shoes and insoles were evaluated and considered as 100%. Two different shoe designs (short heel – short sole, ii: short heel – complete sole) were compared in two trials each with appropriate and inappropriate use (attempting to put weight on the forefoot) gait pattern. Plantar pressure values were obtained using the Pedar® cable system (Novel Inc., Munich, Germany). For analysis, pedobarographic pictures were subdivided into midfoot (31% to 60% of the total insole length) and forefoot (61% to 100% of the total insole length). ANOVA was used for statistical analysis, and p values less than 0.01 were considered significant. Results: With the short-soled shoe, forefoot and midfoot relief was 100% in both compliant and in noncompliant use. With wearing a complete sole, compliant use led to a significant reduction ( p < 0.01) of mean peak pressure under the forefoot (34 ± 13% remaining) and midfoot (47 ± 13% remaining). Noncompliant use of the complete-sole shoe produced mean peak pressure values significantly higher ( p < 0.01) than normal gait in mass produced shoes under the forefoot, but not under the midfoot. Conclusions: Forefoot-relief shoes are effective in reducing both mean and peak plantar pressures. Shoes with a nonsupported midfoot and forefoot may be safer with inappropriate use than shoes with a complete sole. The kind of forefoot shoe should be carefully chosen to regulate weightbearing after reconstructive forefoot surgery.
Long-Term Results After Functional Nonoperative Treatment of Achilles Tendon Rupture
Authors: Hufner Tobias M. , Brandes Dirk B. , Thermann Hajo , Richter Martinus , Knobloch Karsten , Krettek Christian
Published: January 2017

Background: Nonoperative treatment of complete Achilles tendon ruptures generally involves a long period of cast immobilization and is associated with frequent reruptures. Functional nonoperative treatment of complete Achilles tendon ruptures involves the use of a high-shaft boot with a 3-cm hindfoot elevation, in which physical therapy is begun after 3 weeks of wear. We reviewed our long-term results with this treatment protocol to determine its effectiveness. Methods: The indications for nonoperative treatment, defined by ultrasound, were a distance of 10 mm or less between the tendon ends with the ankle in neutral position and complete apposition of the tendon ends in 20 degrees of plantarflexion. From 1990 to 1996, 168 patients were treated; 125 (74%) were available for followup at a mean of 5.5 (2 to 12.7) years after the injury. Results: Good or excellent results were achieved in 92 (73.5%) with complete rehabilitation and return to sports activity at their pre-injury levels. Satisfactory (9%) and poor results (17.5%) were due to pain in the Achilles tendon region, a lengthened Achilles tendon, markedly reduced strength, or a marked reduction of calf size in 25 patients (76%). Eight patients (6.4%) sustained a rerupture. Conclusions: Functional nonoperative treatment achieved good results in patients who had precise sonographic evaluation and who were compliant. As a result of our study, we modified our protocol: (1) a repeat ultrasound examination is done by an experienced sonographer 2 to 5 days after the first to confirm the indications for nonoperative treatment, (2) the use of the 3-cm hindfoot elevation is extended from 6 to 8 weeks to provide a longer protection of the tendon, and (3) patients then wear shoes with 1-cm hindfoot elevation for another 3 months.
Radiographic Angles in Hallux Valgus: Differences Between Measurements Made Manually and With a Computerized Program
Authors: Piqué-Vidal Carlos , Maled-García Ignaci , Arabi-Moreno Juanjo , Vila Joan
Published: January 2017

Background: The objective of this study was to compare angular measurements in the evaluation of hallux valgus deformities using a goniometer and a computerized program to assess degree of concordance between the two methods and determine the reliability of manual measurements. Methods: Angles measured included the hallux valgus angle (HVA), the intermetatarsal angle (IMA), the distal metatarsal articular angle (DMAA), and the proximal phalangeal articular angle (PPAA), also called the hallux valgus interphalangeus angle or interphalangeal angle. Measurements were made on preoperative weightbearing radiographs in 176 patients with symptomatic hallux valgus. Manual measurements were made with a goniometer by an orthopaedic surgeon. An independent experienced technician used digitized images to perform angular measurements with the Autocad® software program (Autodesk Inc., San Rafael, CA). Results: HVA values obtained with the two techniques were similar. However, significantly higher mean values were obtained with the Autocad® for the IMA and PPAA measurements, and higher mean values were obtained for the DMAA measurement with the manual technique. Whereas differences were more or less randomly distributed for the HVA, in the remaining patients, measurements were clearly related to the measurement technique, i.e., for the DMAA, the manual technique had a tendency to show higher values, and for the IMA and PPAA the manual technique showed lower values than the computer. Correlations between both techniques for the different angular measurements were as follows: HVA, −0.179 ( p = 0.018); DMMA, −0.294 ( p >0.001); PPAA, −0.876 ( p >0.001); and IMA, −0.661 ( p >0.001). The intraclass correlation coefficient (ICC) showed that the concordance between manual and Autocad® angular measurements was excellent for the HVA ( ICC = 0.89) and DMAA ( ICC = 0.80) and very poor for the PPAA ( ICC = 0.11) and IMA ( ICC = 0.42). Conclusions: Angular measurements made on weightbearing radiographs with the Autocad® in patients with hallux valgus deformities were more reliable than those made with a goniometer. Although for large angles, such as HVA and DMAA, results obtained with both measurement techniques were similar. Manual measurements, however, may underestimate the true values of the smaller IMA and PPAA angles.
A Biomechanical Comparison of Locking and Nonlocking Plates for the Fixation of Calcaneal Fractures
Authors: Redfern David J. , Oliveira Miguel L.R. , Campbell John T. , Belkoff Stephen M.
Published: January 2017

Background: Locking plate systems have been developed in an attempt to increase the strength of fracture fixation and, in so doing, allow earlier mobilization and rehabilitation. The purpose of our study was to compare the mechanical integrity of the locking plate and traditional nonlocking plate fixation for calcaneal fractures in a cadaver model. Our hypothesis was that the locking plate construct provides stronger fixation than the nonlocking plate construct. Methods: We created a Sanders type-IIB fracture in 10 pairs of fresh-frozen cadaver feet (bone mineral density, 0.50 ± 0.14 g/cm2 age, 69 ± 16 years). One foot of each pair was fixed with a nonlocking calcaneal plate (Synthes, Paoli, PA), and the contralateral foot was fixed with the Locking Calcaneal Plate (Synthes, Paoli, PA). The specimens then were cyclically loaded through the tibia from 0 to 700 N at 1 Hz on a materials testing machine to simulate weightbearing. Fragment displacement was measured with a three-dimensional kinematic analysis system. Significance was set at p >0.05. Results: There was no significant difference between the two plating systems with respect to the mean (± SD) number of cycles to failure (locking plate, 3261 ± 2355; nonlocking plate, 2271 ± 2465). Conclusion: In a cadaver model of type-IIB calcaneal fractures, locking plate fixation did not provide a biomechanical advantage over traditional nonlocking plate fixation.
Characterization of Lesions of the Talus and Description of Tram-Track Lesions
Authors: Li Jun , Jadin Kyle , Masuda Koichi , Sah Robert , Muehleman Carol
Published: January 2017

Background: The ankle joint, although not prone to primary osteoarthritis (OA), is known to be susceptible to secondary OA as a result of sports injuries and other trauma. Unlike the knee joint, a thorough investigation of talar cartilage lesions has not been previously reported. Methods: One hundred and five human tali from 67 donors were used to determine the type and location of the most common lesions through gross examination, radiography, diffraction enhanced imaging, and histology. “tram-track lesions” also are described. Results: The most anterior and posterior regions of the talar dome, along with the medial and lateral borders of the dome were most affected by cartilage degeneration. These are regions that appear to be most subjected to frictional forces from their articulating counterparts during high stress activities that move articulating surfaces slightly out of congruence with each other. One particularly striking cartilage degeneration pattern that, to our knowledge, has not been described histologically, is the tram-track lesion. These lesions displayed a longitudinally oriented groove in the cartilage, running from anterior to posterior, in which the deepest portion of the groove was located in the middle of the anterior-posterior axis of the talus. Several of these cartilage grooves had a bony ridge beneath, mirroring the cartilage groove whereas others did not. This suggests that the cartilage groove develops before the interruption of the tidemark (border between the calcified and uncalcified cartilage). In specimens for which the articulating tibial articular surface was available, (17) it was found that the tibia displayed small osteophytes on the anterior articular margin that exactly corresponded to their articulation with the talar cartilage grooves as the ankle articulated through plantar flexion and dorsiflexion. Conclusion: This study provides an in-depth histologic and gross anatomic look at the most common lesions of the talus of the ankle joint. In particular, the “tram-track” lesion was shown to be a consequence of its tibial articulation and to include both subchondral bone and articular cartilage changes.
An In vitro Study Comparing the Use of Suture Anchors and Drill Hole Fixation for Flexor Digitorum Longus Transfer to the Navicular
Authors: Sullivan Raymond J. , Gladwell Heather A. , Aronow Michael S. , Nowak Michael D.
Published: January 2017

Background: The surgical management of posterior tibial tendon dysfunction often includes transfer of the flexor digitorum longus (FDL) tendon through a tunnel in the navicular. Fixation often is obtained by sewing the tendon back onto itself. The purpose of this study was to compare this standard method of fixation with suture anchor fixation, a technique that may be associated with less surgical morbidity, because it requires the harvesting of less tendon length. Methods: FDL tendon transfer to the navicular was done in 13 fresh-frozen cadaver specimens. In six feet comprising the standard group, the FDL tendon was transected distal to the master knot of Henry, placed through a drill hole into the navicular, and sutured back onto itself. In seven feet the FDL tendon was transected proximal to the master knot of Henry, placed into a drill hole into the navicular, and fixed with a suture anchor. Load was applied to the proximal FDL muscle and tendon using a materials testing system (MTS) machine and peak load to failure was measured. Results: The mean load to failure was 142.48 N ± 38.06 N for the standard group and 142.12 N ± 59.26 N for the suture anchor group ( p = 0.305 for the Student-t test and p = 0.945 for the Mann-Whitney test). Conclusion: Transfer of the FDL tendon to the navicular using suture anchor fixation requires less tendon length yet provides similar fixation strength as compared to sewing the tendon back onto itself. However, suture anchors are considerably more expensive than sutures. Clinical Implications: Suture anchors allow comparable fixation of FDL tendon transfer into a navicular without the need to disrupt the master knot of Henry. This technique may be associated with less morbidity including a shorter incision, decreased risk of medial plantar nerve injury, and decreased loss of lesser toe plantarflexion strength secondary to maintenance of the normal interconnections between the flexor hallucis longus (FHL) and FDL tendons.
The Effect of Gender, Age, and Lateral Dominance on Arch Height and Arch Stiffness
Authors: Zifchock Rebecca A. , Davis Irene , Hillstrom Howard , Song Jinsup
Published: January 2017

Background: Arch structure is known to vary widely. However, it may be linked to intrinsic factors such as gender, age, and lateral dominance. Understanding the association between these factors and arch structure may be useful in understanding injury biases that exist between individuals with different foot types. Methods: The foot structure of 145 subjects, 68 men and 77 women (18 to 65 years) was examined in this study. The arch height index, a measure of dorsal height normalized to foot length, and arch stiffness of both feet were measured in each subject. Comparisons of both arch height and arch stiffness were made between genders and between the dominant and nondominant feet. In addition, the relationship between both arch height and stiffness and age was examined. Results: There was no difference between the arch height index of men and women; however, the arches in women were significantly less stiff ( p = 0.00). There were no statistically significant relationships between increasing age and either arch height index or stiffness. The within-subject comparisons showed that the dominant foot had a significantly higher arch height index than the nondominant foot ( p = 0.00). However, arch stiffness was not different between sides. There was a significant, but weak, relationship between arch height index and arch stiffness ( p = 0.00, R 2 = 0.09) with a higher arch height index corresponding to a stiffer arch. Conclusion: Understanding differences in arch structure may lend insight into the predilection for injury between genders, with increasing age, and between sides of a given subject.
The Effects of Unilateral Gastrocsoleus Recession
Authors: Sammarco Giacomo J. , Bagwe Mahesh R. , Sammarco V. James , Magur Edward G.
Published: January 2017

Background: Gastrocsoleus recession is commonly performed to correct equinus contracture of the ankle that may accompany foot and ankle disease in adults. There is concern that mechanical lengthening of the myotendinous unit causes permanent weakness and disability. This retrospective study reviewed the short-term and long-term objective and subjective results of patients who have had this procedure to determine if it is an appropriate adjunct to corrective foot surgery. Methods: Forty patients who had unilateral gastrocsoleus recession either as an isolated procedure or in conjunction with other surgeries were available for evaluation at an average 25.3 (range 6 to 50) months. Followup evaluation included the AOFAS ankle hindfoot score, subjective questionnaire, and physical examination. Preoperative and postoperative ranges of motion were compared. Mechanical strength testing was done using the contralateral extremity as a control. Maximal strength was measured by peak torque using a Cybex device (CYBEX International, Inc., Ronkonkoma, New York). Fatigue resistance was measured by comparing the maximal number of toe raises between the operative and nonoperative sides. Results: Range of motion improved from −3.5 to 15.3 degrees average dorsiflexion. Subjectively, two patients reported pain at the operative site, and one patient reported moderate weakness. The AOFAS score improved from 62.3 to 79.5. Strength testing of plantarflexion peak torque found the operative extremity to be 74% of the contralateral leg at followup. Peak torque improved from an average of 62.6% at 6 to 18 months to 82.2% after 18 months compared to the contralateral extremity. Fatigue resistance improved from 37.6% to 50.3% at 18 months. Two patients reported paresthesias in the sural nerve distribution. Conclusion: Gastrocsoleus recession is an effective procedure to correct equinus contracture either as an isolated procedure or as an adjunct to other foot surgery. While both fatigue resistance and strength decreased initially, both demonstrated improvement over time. Four patients had subjective complaints after the procedure.
Cyclic Loading of Achilles Tendon Repairs: A Comparison of Polyester and Polyblend Suture
Authors: Benthien Ross A. , Aronow Michael S. , Doran-Diaz Vilmaris , Sullivan Raymond J. , Naujoks Ryan , Adams Douglas J.
Published: January 2017

Background: Early functional rehabilitation is widely used after open suture repair of the Achilles tendon. To our knowledge, no previous studies have assessed gap formation from cyclic loading and subsequent failure loads of simulated Achilles tendon repairs. A synthetic (polyblend) suture has been introduced for tendon repairs with reportedly greater strength than polyester suture. This stronger, stiffer suture material may provide stronger repairs with less elongation of the tendon repair. Methods: Simulated Achilles tendon ruptures in bovine Achilles tendon were repaired with a four-strand Krackow suture technique using No. 2 polyester suture. Specimens were loaded for 3000 cycles at maximal loads of 50, 75,100, or 125 N, and gap formation at the repair site was continuously measured. After cyclic loading, each specimen was loaded to failure. Identical repairs were performed with number 2 polyblend suture and cyclically loaded to 75 N for 3000 cycles. All specimens were loaded to failure. Results: Cyclically loading polyester suture repairs to 50, 75, 100, or 125 N for 3000 cycles resulted in mean gapping at the repair site of 3.0 ± 0.8,4.9 ± 1.0,7.2 ± 0.9, and 7.9 ± 0.8 mm, respectively. Cyclically loading the polyblend suture repairs for 3000 cycles at 75 N, resulted in 3.3 ± 0.3 mm of gap formation at the repair site, significantly less than polyester suture repairs ( p < 0.001). The mean load to failure for polyester suture repair was 222 ± 19 N and for polyblend suture repair was 582 ± 49 N, a statistically significant difference ( p < 0.001). Gap formation at 100, 1000, and 2000 cycles, as a percentage of total gap formation at 3000 cycles, was 64.3%, 87.5%, and 95.4% for polyester suture and 45.8%, 78.5%, and 90.1% for polyblend repairs. All specimens in all groups failed at the knots during load-to-failure testing. Conclusions: Cyclic loading of simulated Achilles tendon repairs using a Krackow, four-core polyester suture technique showed progressive gap formation with increasing load. All repairs failed at the knot, and suture pull-out from tendon was not observed. Polyblend suture repair, when compared to identical repairs with braided polyester suture, resulted in a 260% higher load to failure and 33% less gap formation at the repair site after 3000 cycles. Clinical Relevance: The use of polyblend suture in a four-stranded Krackow configuration provides stronger repairs with less gap formation, which may provide increased security during early functional rehabilitation.
Modified Coughlin Procedure for Surgical Treatment of Symptomatic Tailor's Bunion: A Prospective Followup Study of 33 Consecutive Operations
Authors: Vienne Patrick , Oesselmann Meike , Espinosa Norman , Aschwanden Ralf , Zingg Patrick
Published: January 2017

Background: Symptomatic tailor's bunion is a painful osseous and soft-tissue prominence at the lateral aspect of the fifth metatarsal head. If conservative treatment fails, surgery is necessary to correct the deformity and to relieve the symptoms. The “Coughlin” procedure is an established corrective diaphyseal realignment osteotomy. The purpose of this study was to analyze the results of a modification of the Coughlin procedure in a series of 24 consecutive patients. Methods: Between October, 1999, and August, 2002, we performed a modified Coughlin procedure for painful tailor bunions in 24 patients (33 feet). An additional bunionectomy was done only if the fifth metatarsal head remained prominent after the osteotomy (20 feet). The average age of the patients was 45 years. All patients were evaluated preoperatively and postoperatively using the AOFAS forefoot score, and the correction of the fourth-fifth intermetatarsal angle was assessed on full weightbearing dorsoplantar radiographs. The average followup was 24 months for objective and 39 months for the subjective results. Results: There were no intraoperative and postoperative complications. The mean AOFAS score increased from 55 points preoperatively to 95 points at followup. At longest followup the subjective results were rated as good or excellent in 22 patients (97%). No difference in subjective patient satisfaction was seen whether bunionectomy was done or not. The mean fourth-fifth intermetatarsal angle improved from 10.4 degrees preoperatively to 1 degree at followup. Six patients (18%) required screw removal which was carried out on an outpatient basis under local anesthesia. Conclusion: The modified Coughlin procedure is a technically safe and reliable procedure for treatment of painful tailor's bunion. In our experience, it yields good or excellent results with high patient satisfaction and a low complication rate. Internal screw fixation leads to stable bony fusion with full weightbearing immediately postoperatively and is associated with a relatively low rate of implant removal.
Long-Term Results after Metatarsal Head Resection in the Treatment of Rheumatoid Arthritis
Authors: Reize Patrik , Leichtle Carmen Ina , Leichtle Ulf Gunther , Schanbacher Jörg
Published: January 2017

Background: In this retrospective study, both the patients' and surgeons' satisfaction with resection of the first through fifth metatarsal heads for long-standing rheumatoid forefoot deformity was evaluated. Methods: Thirty-four patients (56 feet) had first through fifth metatarsal head resection. After a mean time of 5.3 years, 39 feet (69.6%) (26 patients) were examined clinically and radiographically. Results: The complication rate was 14% (8 of 56). There were four superficial and four deep wound infections. Plantar pressure pain under the resected metatarsal heads occurred in six feet. Most patients rated their cosmetic and functional results as good. Eighteen percent of patients (6 of 34) were satisfied and 78% (26 of 34) were satisfied with reservations. Thirty-three percent of patients (11 of 34) were pain free and 53% (18 of 34) had mild pain. The surgeons assessment of the patients' anatomical correction (cosmesis) was good in 90% (50 of 56) and poor in 10% (6 of 56). Conclusions: Our results, which are comparable to those of other studies, confirm the success of metatarsal head resection for the treatment of inflammatory forefoot destruction in rheumatoid arthritis to correct deformity, reduce pain, improve ambulation, and offer the patient a greater variety of shoewear.
Tibiotalocalcaneal Arthrodesis Using a Dynamically Locked Retrograde Intramedullary Nail
Authors: Pelton Kevin , Hofer Jason K. , Thordarson David B.
Published: January 2017

Background: Tibiotalocalcaneal arthrodesis is an important salvage method for patients with complex hindfoot problems, including Charcot arthropathy, osteonecrosis of the talus, combined arthritis of the ankle and subtalar joint, and failed total ankle arthroplasty. This study evaluated the results of a dynamic retrograde intramedullary nail for fixation with posterior to anterior distal interlocking screws placed through the calcaneus for tibiotalocalcaneal fusion. Methods: Thirty-three consecutive tibiotalocalcaneal fusions were done by a single surgeon (DBT) and were stabilized with a dynamic retrograde intramedullary nail. Time to fusion, impaction of the nail relative to the intramedullary canal, nail-tibial angle, and complications were noted. Average followup was 14 months. Results: Twenty-nine of 33 feet (88%) fused at an average of 3.7 months after surgery. Average impaction of the nail was 2.3 (0.5 to 5.0) mm. Cortical hypertrophy at the tip of the rod or at the proximal interlocking screw was noted in 13 of 27 patients. A trend toward a higher nonunion rate was noted in patients with an increased nail-tibial angle. Conclusion: Dynamic retrograde intramedullary nailing for fixation of the tibiotalocalcaneal fusions is a good method of stabilizing this complex fusion construct.