Flexor Hallucis Longus Transfer Research Articles

Endoscopic Flexor Hallucis Longus Transfer for Chronic Noninsertional Achilles Tendon Rupture.

Operative management of chronic Achilles tendon ruptures is challenging, and numerous techniques have been described. Risk of infection and wound breakdown have been described after open techniques, and minimally invasive methods have been proposed to avoid them. The aim of this study was to describe the clinical and radiological results obtained after endoscopic flexor hallucis longus (FHL) tendon transfer in patients with chronic Achilles tendon rupture. Between 2012 and 2015, a total of 22 patients were endoscopically treated for chronic Achilles tendon rupture. Mean age was 69 years (range, 59-84 years). Mean follow-up was 30.5 months (range, 18-46 months). Preoperative magnetic resonance imaging (MRI) was obtained and tendon gap measured. An MRI was obtained at 9 to 12 months following surgery to evaluate Achilles tendon changes. Preoperative MRI examination showed a mean tendon gap of 6.3 cm (range, 3-10.7 cm). The MRI control was obtained only in 12 patients, and a normal or close to normal Achilles tendon was observed in all but 1 patient. The mean American Orthopaedic Foot & Ankle Society score increased from 55 preoperatively (range, 26-75) to 91 (range, 74-100) at final follow-up. All patients returned to their daily activities without difficulties. No patients reported complaints or symptomatic deficits of great toe flexion strength. No major complications were encountered. Chronic Achilles tendon ruptures were successfully treated by an all-endoscopic procedure. The endoscopically assisted FHL transfer provided excellent results while benefiting from the minimally invasive procedure advantages. However, it entailed some technical challenges and may not be suitable for less experienced surgeons. Level IV, retrospective case series.

Sport and physical activities in patients with Chronic Achilles tendon rupture reconstruction using flexor hallucis longus transfer

Category: Sports Introduction/Purpose: Neglected or chronic Achilles tendon ruptures can be significantly disabling to patients if the muscle-tendon unit is stretched beyond its normal passive limit. Chronic rupture of the Achilles tendon (delayed diagnosis of more than 4 weeks) can result in retraction of the tendon and inadequate healing. Direct repair may not be possible and clinical results may not be satisfactory especially if the distal stump is grossly tendinopathic and when the defect exceeds 5-6 cm. Methods: We evaluated 9 patients (mean age 63) who underwent flexor hallucis longus transfer for treatment of chronic Achilles tendinopathy between May 2014 and January 2017 at a 12 months follow-up. Our results were measured with the SF-12 survey, AOFAS Ankle-Hindfoot Scale and VAS. Activity levels were determined using the Halasi ankle activity scale and the UCLA score obtained preoperatively and 12 months after surgery. Wound complications and tip-toe stance were also assessed. Results: All patients had a significant improvement of AOFAS, VAS and SF-12 scores. The Halasi activity scale and UCLA score were 5.8 and 8.2 respectively 12 months after surgery. Patient reported outcome measures consistently demonstrated improvement in clinical putcomes at 12 months follow-up. The patients went back to full daily function, could single leg heel raise and were gradually returning to sport. No major complications were recorded. Conclusion: Reconstruction of chronic tears of the Achilles tendon with flexor hallucis longus transfer can achieve satisfactory improvements in clinical outcomes at 1 year follow-up.

Anatomical Feasibility Study of Flexor Hallucis Longus Transfer in Treatment of Achilles Tendon and Posterior Ankle Arthroscopy

Category: Hindfoot Introduction/Purpose: The aim of this study was to evaluate the occurrence of anatomical variations of the musculotendinous junction of the flexor hallucis longus (FHL) muscle, the relationship between FHL tendon or muscle and the tibial neurovascular bundle at the level of the posterior ankle joint in human cadavers. Methods: Seventy embalmed feet from 20 male and 15female cadavers, the cadavers’ mean age was 65.4 (range from 14 to 82) years, were dissected and anatomically classified to observe FHL muscle morphology define the relationship between FHL tendon or muscle and the tibial neurovascular bundle . The distance between the musculotendinous junction and thehe relationship between FHL tendon or muscle and the tibial neurovascular bundle was determined. Results: The three morphology types of FHL muscle were identified: a long lateral and shorter medial muscle belly, which was observed in 63 specimens (90%).; equal length medial and lateral muscle bellies, this variant was only observed in 5 specimens (7.1%); a lateral and no medial muscle belly, which was observed in 2 specimens (2.9%). No statistically significant difference was observed according to gender or side (p > 0.05). Two patterns were identified and described between FHL tendon or muscle and the tibial neurovascular bundle. Pattern 1, the distance between the neurovascular bundle and FHL tendon was 3.46 mm (range, 2.34 to 8.84, SD = 2.12) which was observed in 66 specimens (94.3%); Pattern 2, there was no distance which was observed in 4 specimens (5.7%). Conclusion: Knowing FHL muscle morphology variations provide new important insights into secure planning and execution of a FHL transfer for Achilles tendon defect as well as for the interpretation of ultrasound and magnetic resonance images. During posterior arthroscopic, posteriormedial portal may be introduced into the posterior aspect of the ankle without gross injury to the tibial neurovascular structures.

Flexor hallucis longus transfer clinical outcome through a single incision for chronic Achilles tendon rupture

The aim of this study is to evaluate the clinical outcome of single-incision flexor hallucis longus tendon transfer in chronic Achilles tendon rupture. A prospective study of a series of cases of chronic Achilles tendon rupture that were treated with single-incision flexor hallucis longus tendon transfer, from April 2015 to December 2016. The study included 21 patients (15 men and 6 women), with mean age 40.3 ± 17.5years. The average follow-up time was 15 (12-24) months. Flexor hallucis longus transfer was fixed with a titanium interference screw in an intraosseous calcaneal tunnel. The average operative time was 52.9 ± 8.7 minutes. The AOFAS-hindfoot score was significantly improved from the mean pre-operative value of 57.4 ± 10.3 to mean value of 95.3 ± 4.4 (p value < 0.001). There was no effect on the big toe function. The complication recorded was one superficial wound infection which resolved by dressing and appropriate antibiotic coverage. All patients were satisfied with the results of surgery. Single-incision flexor hallucis longus transfer for chronic Achilles tendon ruptures is a simple method with minimal morbidity and complications. The technique resulted in great patients' satisfaction as well as excellent functional and clinical outcomes.

The functional and dynamometer-tested results of transtendinous flexor hallucis longus transfer for neglected ruptures of the Achilles tendon at six years' follow-up.

Flexor hallucis longus (FHL) tendon transfer is a well-recognized technique in the treatment of the neglected tendo Achillis (TA) rupture. We report a retrospective review of 20/32 patients who had undergone transtendinous FHL transfer between 2003 and 2011 for chronic TA rupture. Their mean age at the time of surgery was 53 years (22 to 83). The mean time from rupture to surgery was seven months (1 to 36). The mean postoperative follow-up was 73 months (29 to 120). Six patients experienced postoperative wound complications. The mean postoperative Achilles tendon Total Rupture Score (ATRS) was 83 (40 to 100) and the mean American Orthopaedic Foot & Ankle Society (AOFAS) score was 94.3 (82 to 100). Tegner scoring showed a mean reduction of one level from the pre-injury level of activity. There was a mean reduction of 24% (4 to 54) in dynamometer-measured strength of ankle plantarflexion, in comparison with the non-operated side. The hallux had a mean of only 40% (2 to 90) strength of plantarflexion in comparison with the contralateral side. We conclude that transtendinous FHL transfer for neglected TA ruptures, with a long harvest to allow reattachment of the triceps surae, provides reliable long-term function and good ankle plantarflexion strength. Despite the loss of strength in hallux plantar flexion, there is little comorbidity from the FHL harvest. Cite this article: Bone Joint J 2018;100-B:584-9.

Anatomical feasibility study of flexor hallucis longus transfer in treatment of Achilles tendon and posteromedial portal of ankle arthroscopy

The aim of this study was to evaluate the occurrence of anatomical variations of the musculotendinous junction of the flexor hallucis longus (FHL) muscle, the relationship between FHL tendon or muscle and the tibial neurovascular bundle at the level of the posterior ankle joint in human cadavers. Seventy embalmed feet from 20 male and 15 female cadavers, the cadavers' mean age was 65.4 (range from 14 to 82)years, were dissected and anatomically classified to observe FHL muscle morphology define the relationship between FHL tendon or muscle and the tibial neurovascular bundle. The distance between the musculotendinous junction and the relationship between FHL tendon or muscle and the tibial neurovascular bundle was determined. Three morphology types of FHL muscle were identified: a long lateral and shorter medial muscle belly, which was observed in 63 specimens (90%); equal length medial and lateral muscle bellies, this variant was only observed in five specimens (7.1%); one lateral and no medial muscle belly, which was observed in two specimens (2.9%). No statistically significant difference was observed according to gender or side (p > 0.05). Two patterns were identified and described between FHL tendon or muscle and the tibial neurovascular bundle. Pattern 1, the distance between the neurovascular bundle and FHL tendon was 3.46mm (range 2.34-8.84, SD = 2.12) which was observed in 66 specimens (94.3%); Pattern 2, there was no distance which was observed in four specimens (5.7%). Knowing FHL muscle morphology, variations provide new important insights into secure planning and execution of a FHL transfer for Achilles tendon defect as well as for the interpretation of ultrasound and magnetic resonance images. With posterior arthroscopic for the treatment of various ankle pathologies, posteromedial portal may be introduced into the posterior aspect of the ankle without gross injury to the tibial neurovascular structures because of the gap between the neurovascular bundle and FHL tendon.

Chronic insertional achilles tendon ruptures treated by suture anchor repair and augmentation with flexor hallucis longus tendon transfer

&lt;p class="abstract"&gt;&lt;strong&gt;Background:&lt;/strong&gt; &lt;span lang="EN-IN"&gt;Different surgical procedures have been used for treatment of chronic ruptures of the Achilles tendon with varying results. This study assesses the functional outcomes and complications of chronic insertional tears of Achilles tendon.&lt;/span&gt;&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Methods:&lt;/strong&gt; &lt;span lang="EN-IN"&gt;10 patients with chronic ruptures of the Achilles tendon were followed for a mean period of 10.3 months. Only ruptures at or near (within 1 cm) insertion were included. They were treated by direct repair of tendon to calcaneum by suture anchor. Flexor hallucis longus (FHL) tendon transfer fixed to calcaneal tunnel with an interference screw was used to augment the repair&lt;/span&gt;.&lt;strong&gt;&lt;/strong&gt;&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Results:&lt;/strong&gt; &lt;span lang="EN-IN"&gt;Outcome was assessed by AOFAS Ankle-Hindfoot (AHS) score. The mean preoperative score of 41.2 improved to 85.4 at final follow-up out of a total 100 points. We achieved excellent results in 80% and good outcome in 20% cases. No re-ruptures were noted. &lt;/span&gt;&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Conclusions:&lt;/strong&gt; &lt;span lang="EN-IN"&gt;In insertional chronic ruptures of Achilles tendon, FHL transfer to calcaneum with interference screw fixation and repair of Achilles tendon with suture anchor is a reliable technique with good outcome and is recommended.&lt;/span&gt;&lt;/p&gt;

Endoscopic Transfer of Flexor Hallucis Longus Tendon for Chronic Achilles Tendon Rupture: Technical Aspects and Short-Time Experiences.

Chronic Achilles tendon ruptures can lead to reduced power of plantar flexion in the ankle with impaired gait ability. The open 1- or 2-incision technique for flexor hallucis longus transfer has proven good functional outcome but has the disadvantage of relatively extensive surgery performed at a vulnerable location. To reduce the risk of soft tissue problems, the flexor hallucis longus transfer can be performed endoscopically. An endoscopic technique for flexor hallucis longus transfer is presented together with the experiences from the first six patients operated with this method. No wound healing problems or infections. Five of 6 patients managed single leg heel raise on the affected side 12 months after surgery. The functional results are promising. The soft tissue dissection is minor, and no patients had postoperative wound healing problems or infection. Endoscopic flexor hallucis longus transfer may be an operative procedure that can be considered also in patients with potential wound healing problems. Level IV: Technical note/case series without controls.

Flexor hallucis longus transfer versus turndown flaps augmented with flexor hallucis longus transfer in the repair of chronic Achilles tendon rupture

BackgroundRepairs of chronic Achilles tendon ruptures are technically challenging due to large defects after scar excision. Multiple techniques for repair have been proposed but little consensus on best practice established. This study aims to compare flexor hallucis longus (FHL) transfers versus turndown flaps augmented by FHL transfers. MethodsBetween 2005 and 2015, 49 unilateral repairs of chronic Achilles tendon ruptures were performed. We retrospectively compared the outcomes of 20 patients who underwent FHL transfer with 19 patients who underwent turndown flaps augmented with FHL transfer before surgery and at three time points after surgery (three, six and twelve months). Visual Analogue Scale (VAS), American Orthopaedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Scale and the 36-Item Short Form Health Survey (SF-36) were used to evaluate outcome. ResultsBoth techniques demonstrated significant improvement in their outcome scores and were comparable to one another. At one year, the mean VAS score was 0 for both groups. The mean AOFAS Ankle-Hindfoot score was 90±11 (FHL) and 95±10 (FHL with turndown flaps); and SF-36 scores showed significant improvements in physical, role and social function scores. Turndown flaps augmented with FHL transfer however required significantly longer operative time (100±21min) compared to FHL transfer alone (73±23min). ConclusionsFHL transfer required significantly less operative time compared to turndown flaps augmented with FHL transfer, with comparable outcomes. FHL transfer is a reliable and effective technique in the repair of chronic Achilles tendon ruptures.

Conservative treatment versus repair deltoid in SER type IV equivalent ankle fracture: A prospective study

Many procedures have been described for operative treatment of chronic Achilles tendon ruptures (CATR) and insertional calcificant achilles tendinosis (ICAT).This technical note describes a novel technique for the treatment or augmentation of different Achilles disorders such as CATR and ICAT, among others. A retrospective study was designed. Fifteen patients were identified and underwent an endoscopic flexor hallucis longus (FHL) transfer to augment Achilles disorders between 2015 and 2016. Patient demographics and complications were extracted from the clinical research database. The average follow-up 11.27 months. The overall success rate was 93.3%. The preoperative mean American Orthopaedic Foot & Ankle Society (AOFAS) score was 62.27 points and 91 points after surgery. The average pain on the visual analogue scale (VAS) in the preoperative was 6.93 and 0.8 in the postoperative period. Only one patient required revision surgery (6.6%). The advantages of doing an FHL transfer include: utilisation of a vascularised tendon with a strong viable muscle, low morbidity and it represents a reproducible technique. Although it may be a good primary indication for CATR and non-insertional AT tendinopathy, it seems reasonable to be indicated in revision surgery in cases affected by ICAT.

Treatment of Catastrophic Failures of Achilles Tendon Repairs Due to Deep Wound Complications

Category: Sports Introduction/Purpose: The Achilles tendon is the most commonly injured tendon in the lower extremity. Whether these ruptures are acute or chronic, a surgical Achilles repair or reconstruction is often needed to restore tendon integrity and function. Risks from such surgeries include superficial or deep wound infections and/or dehiscence. To date, there is scant literature regarding the treatment of catastrophic failures of Achilles tendon repairs or reconstructions from deep wound infection and dehiscence. The purpose of this study is to retrospectively examine clinical outcomes from uniform single-stage surgical treatment of catastrophic failures of Achilles tendon repairs or reconstructions from deep wound complications. Methods: Between 2007 and 2016, 10 patients developed a deep wound infection and dehiscence after surgical treatment of an acute or chronic Achilles rupture. Medical co-morbidities included obesity in 4, diabetes in 3, and nicotine use in 2 patients. Six and 4 patients had a mid-substance and insertional Achilles rupture respectively. Three patients had an acute injury that received an end-to-end suture repair. Seven patients had a chronic injury with Achilles retraction, which necessitated proximal Achilles or gastrocnemius lengthening. These patients required surgery for their wound problem due to depth and involvement of their Achilles repair/reconstruction site. Surgery involved a single-stage wound irrigation and debridement, Achilles excisional debridement at the repair/reconstruction site, flexor hallucis longus transfer to the calcaneus to replace the compromised or failed Achilles repair/reconstruction, and primary or vacuum assisted wound closure. Patients were followed for 6 months after this surgery and invited for recent follow-up to collect data. Results: With uniform surgical treatment, full resolution of deep wound infection and dehiscence after Achilles repair/reconstruction was achieved in all 10 patients. No patients developed a recurrence of wound complications and/or infection to necessitate any further surgical debridements. All 10 patients presented for recent follow-up at a mean of 57.3 months. Mean Foot and Ankle Ability Measures increased from 36.3% at initial presentation before Achilles repair/reconstructive surgery to 84.2% at latest follow-up (P&lt;0.05). Mean Visual Analog Scores of pain decreased from 6.6 of 10 before the Achilles repair/reconstruction to 1.5 of 10 at latest follow-up (P&lt;0.05). All patients were able to return to normal gait and full activities at home, with 3 reporting difficulties with prolonged ankle activities at work. Conclusion: This study demonstrates that our method of single-stage surgical treatment of catastrophic failures of Achilles tendon repairs or reconstructions from deep wound complications can achieve a high rate of improved patient function and pain relief. Clinical outcomes of treating patients with this particular complication of Achilles repair/reconstruction in this manner have not been previously reported in the orthopaedic literature. As catastrophic failures of Achilles tendon repairs or reconstructions from deep wound complications are studied further, our method of surgical care should be strongly considered as treatment.

Outcomes of Flexor Digitorum Longus (FDL) Tendon Transfer for the Treatment of Chronic Achilles Tendinopathy

Category: Hindfoot, Sports Introduction/Purpose: Flexor hallucis longus (FHL) tendon transfer is a common surgical technique used for augmentation during the surgical treatment of chronic Achilles tendinopathy and reconstruction. Flexor digitorum longus (FDL) tendon transfer represents a viable surgical alternative for patients with failed FHL transfers or athletes where compromise of the hallux push off strength could negatively impact their level of activity. There is no reported clinical outcome data about this technique in the current literature. Our study describes the clinical and functional results after FDL tendon transfer for the treatment of patients with chronic Achilles tendinopathy. Methods: We retrospectively assessed prospectively collected data on patients that underwent FDL tendon transfer in the treatment of chronic Achilles tendinopathy (March 2012 - March 2015). Charts were reviewed for clinical data, associated treatments and complications. Preoperative assessment included the Visual Analogue Score (VAS), SF-36 health status survey and the lower extremity functional scale (LEFS). At final follow up we evaluated pain level, range of motion of the ankle and the toes, ability to perform single leg raise and toe walking, calf atrophy and complications. Postoperative outcomes were assessed by Visual Analogue Score (VAS), SF-36 health survey, Lower Extremity Functional Scale (LEFS), Foot Function Index (FFI), VISA-A score and the Foot and Ankle Ability Measure (FAAM). Fifteen patients (seventeen feet), 6 males and 9 females, mean age of 53.6 years (27- 76 years) and an average body mass index of 31.4 kg/m2 (20.5 to 45.4 kg/m2) were included in the study. Results: Mean follow-up was 27.5 months (15-49). Four patients (6 feet) had prior surgeries, including two patients with failed FHL transfer. We found significant clinical improvement when comparing pre-operative and postoperative VAS scores (6.0±3.3 versus 1±1.36; p&lt;0.001), SF-36 physical component summary (28.2±10.7 versus 45.0±11.1; p&lt;0.002) and LEFS (36.4±22 versus 57.9±20.5; p&lt;0.011). At final follow up, 6/7 patients (86%) returned to prior levels of recreational sport activities. No differences were found on single leg raise test when compared to uninvolved side. One patient reported weakness for plantar flexion of the toes, without gait complaints. Mean VISA-A was 52.6 points (15-85), Foot Function Index (FFI) 21.2% (0-65%) and FAAM 86.2% (55.3-100%) for the FAAM. Three patients had superficial infection and two patients had deep infection, requiring surgical debridement. Conclusion: FDL tendon transfer represents a safe surgical alternative as a method of augmentation during the treatment of chronic Achilles tendinopathy. Our study showed comparable clinical and functional outcomes to FHL tendon transfer and minimal complications or donor site morbidity.

A Biomechanical Analysis of Interference Screw Versus Bone Tunnel Fixation of Flexor Hallucis Longus Tendon Transfers to the Calcaneus

The flexor hallucis longus tendon transfer is commonly used to restore function in chronic Achilles tendon ruptures and chronic Achilles tendinopathy. The tendon is often secured to the calcaneus either through a bone tunnel or by an interference screw. We hypothesized that tenodesis using the bone tunnel method would be mechanically superior to interference screw fixation for flexor hallucis longus transfers. Eight matched pairs of cadaveric specimens were assigned randomly to the bone tunnel or interference screw technique and were loaded to failure. Biomechanical analysis was performed to evaluate the ultimate strength, peak stress, Young's modulus, failure strain, and strain energy. Unpaired comparison, paired comparison, and linear regression analyses were used to determine statistical significance. A slight 22% ± 9% decrease in Young's modulus and a 52% ± 18% increase of strain energy were found in the interference screw group. However, no differences in ultimate strength, peak stress, or failure strain were seen between the 2 groups on paired comparison. Our findings suggest that interference screw fixation provides similar spontaneous biomechanical properties to the use of a bone tunnel for flexor hallucis longus transfer to the calcaneus. The interference screw is a practical option for fixation of the flexor hallucis longus tendon to the calcaneus and can be performed through a single incision approach.

Biomechanical Analysis of Suture Anchor vs Tenodesis Screw for FHL Transfer.

Chronic Achilles injury is often treated with flexor hallucis longus (FHL) tendon transfer to the calcaneus using 1 or 2 incisions. A single incision avoids the risks of extended dissections yet yields smaller grafts, which may limit fixation options. We investigated the required length of FHL autograft and biomechanical profiles for suture anchor and biotenodesis screw fixation. Single-incision FHL transfer with suture anchor or biotenodesis screw fixation to the calcaneus was performed on 20 fresh cadaveric specimens. Specimens were cyclically loaded until maximal load to failure. Length of FHL tendon harvest, ultimate load, stiffness, and mode of failure were recorded. Tendon harvest length needed for suture anchor fixation was 16.8 ± 2.1 mm vs 29.6 ± 2.4 mm for biotenodesis screw ( P = .002). Ultimate load to failure was not significantly different between groups. A significant inverse correlation existed between failure load and donor age when all specimens were pooled (ρ = -0.49, P < .05). Screws in younger specimens (fewer than 70) resulted in significantly greater failure loads ( P < .03). No difference in stiffness was found between groups. Modes of failure for screw fixation were either tunnel pullout (n = 6) or tendon rupture (n = 4). Anchor failure occurred mostly by suture breakage (n = 8). Adequate FHL tendon length could be harvested through a single posterior incision for fixation to the calcaneus with either fixation option, but suture anchor required significantly less graft length. Stiffness, fixation strength, and load to failure were comparable between groups. An inverse correlation existed between failure load and donor age. Younger specimens with screw fixation demonstrated significantly greater failure loads. Adequate harvest length for FHL transfer could be achieved with a single posterior incision. There was no difference in strength of fixation between suture anchor and biotenodesis screw.

Surgical management of chronic Achilles tendon ruptures using less invasive techniques

BackgroundSurgical management of chronic Tendo Achillis (TA) ruptures usually requires tendon grafting procedures. Several techniques have been described.We examined the outcome of three different less invasive (incisions length less than 3 cm) tendon transfer techniques in the management of patients with a chronic rupture of the TA. MethodsOf 62 patients (39 males and 23 females; mean age 44.8 years; range 29.3–62 years) with chronic TA ruptures managed operatively, 21 patients had a ≥6cm gap and underwent free ipsilateral semitendinosus (ST) graft (21 patients), whereas patients with smaller gaps had either ipsilateral peroneus brevis (PB) (20 patients) or ipsilateral flexor hallucis longus (FHL) transfer (21 patients). Outcome measures included maximum calf circumference, isometric plantar flexion strength, and the Achilles tendon total rupture score (ATRS), preoperatively and at the last follow up. We also recorded the time to return to activities of daily living (ADL) and sports, and the number of single-leg heel lifts on the affected leg at the last follow up, at an average of 35.4 months. ResultsPatient characteristics between groups were similar. All outcome measures significantly improved after surgery (p<0.001), without differences between the three groups. Return to ADL was possible at an average of 4.5 months. Patients undergoing PB transfer had a slower return to sports compared to the other groups, at 6.9±0.5months versus 6.1±0.8 for the FHL and 5.8±0.6 for the ST groups (t-test p=0.005 and p<0.001, respectively). However, 13/14 patients (90%) in the PB group returned to high impact sports, compared to 9/12 (75%) in the FHL and 6/11 (55%) in the ST groups (Fisher’s test, p=0.31 and p=0.056, respectively). ConclusionAll three techniques produced significant functional improvement, and return to sports was possible in most patients. This study does not demonstrate a clear advantage of one technique over the others.

Failed synthetic graft after acute Achilles tendon repair.

The present case report aimed to determine the results of Flexor Hallucis Longus (FHL) transfer as a second surgery after synthetic tissue reinforcement graft (Artelon®) implanted to a primary repaired Achilles tendon (AT), that was undertaken by another orthopedic. One year post-operative the patient was referred to us with retrocalcaneal pain and difficulty in walking, associated with stiffness and significant impairment of daily living activities. MRI and full clinical examination were the outcome measures applied before and 1 year after surgery. Removal of the synthetic graft and subsequent FHL autologous transfer was undertaken and the graft was sent for histology examination. After removing the below knee leg cast, patient started rehabilitation program supervised by a trained physiotherapist. The patient was allowed to return to his normal activities at the sixth post-operative month, 1 year post-surgery MRI showed correct position of the autograft in the calcaneous bone and in the centre of the native AT plus reduced oedema of the AT body, with clinical improvement of the patient who reported no pain and was able to walk on tiptoes. Synthetic patch augmentation to enhance tendon healing should be subjected to proper investigation before using it in routine parctice, as it may act as a barrier against proper tendon healing. V.

Repair of Chronic Achilles Ruptures Has a High Incidence of Venous Thromboembolism.

Despite the low incidence of deep vein thrombosis (DVT) in foot and ankle surgery, some authors report a high incidence of symptomatic DVT following Achilles tendon rupture. The purpose of this study was to identify DVT risk factors inherent to Achilles tendon repair to determine which patients may benefit from prophylaxis. One hundred and thirteen patient charts were reviewed following elective and nonelective Achilles tendon repair. For elective repair of insertional or noninsertional Achilles tendinopathy, parameters examined included lateral versus prone positioning and the presence versus absence of a flexor hallucis longus transfer. For nonelective repair, acute Achilles tendon ruptures were compared to chronic Achilles tendon ruptures. Of 113 Achilles tendon repairs, 3 venous thromboembolism (VTE) events (2.65%) occurred including 2 pulmonary emboli (1.77%). Seventeen of these repairs were chronic Achilles tendon ruptures, and all 3 VTE events (17.6%) occurred within this subgroup. Elevated body mass index was associated with VTE in patients with chronic Achilles ruptures although this did not reach significance ( P = .064). No VTE events were reported after repair of 28 acute tendon ruptures or after 68 elective repairs of tendinopathy. Two patients with misdiagnosed partial Achilles tendon tears were excluded because they experienced a VTE event 3 weeks and 5 weeks after injury, prior to surgery. In our retrospective review, chronic Achilles ruptures had a statistically significant higher incidence of VTE compared with acute Achilles ruptures ( P = .048) or elective repair ( P = .0069). Pharmaceutical anticoagulation may be considered for repair of chronic ruptures. Repair of acute ruptures and elective repair may not warrant routine prophylaxis due to a lower incidence of VTE. Prognostic, Level III: Case Control Study.

Comparison of Radiographic Outcomes Between Dynamic Medial Column Stabilization and Lateral Column Lengthening

Category: Midfoot/Forefoot Introduction/Purpose: Lateral column lengthening (LCL) has been recognized as a most effective surgical treatment for flexible flatfoot. But the LCL is known to be associated with many complications, which are lateral foot pain or calcaneocuboid arthrosis. In order to correct flexible flatfoot without these complications, we have developed a novel technique-dynamic medial column stabilization (dynamic-MCS). The dynamic-MCS consists of flexor hallucis longus transfer to the medial cuneiform, arthrodesis of first tarsometatarsal joint and medial displacement calcaneal osteotomy. The dynamic-MCS had different mechanism from the LCL. The dynamic-MCS directly restores longitudinal arch of flexible flatfoot, while the LCL indirectly restores the longitudinal arch. The purpose of this study is to investigate difference of radiographic outcomes between the dynamic-MCS and the LCL. Methods: Dynamic-MCS group included 16 flexible flatfeet of 16 patients which were treated with the dynamic-MCS from January 2014 to February 2015. The LCL group included 23 flexible flatfeet of 21 patients which were treated with the LCL from January 2011 to January 2014. A single surgeon performed the dynamic-MCS and the LCL in our clinic. We retrospectively evaluated radiological outcomes of the dynamic-MCS group and the LCL group. The preoperative and postoperative radiographic parameters were measured. Talonavicular coverage angle was measured on plain weight-bearing anteroposterior radiograph. Calcaneal pitch, talocalcaneal angle, talar angle, meary angle and 1st metatarsal declination angle were measured on plain weight- bearing lateral radiograph. Hindfoot alignment angle was measured on hindfoot alignment view. We compared postoperative improvements of the dynamic-MCS group with those of the LCL group in each radiographic parameters. All the postoperative values were obtained at the last follow-up. Results: The average age in the dynamic-MCS group was 41 years (95% CI: 33.5-47.9) and mean follow-up period was 12.9 months (minimum 10months). The average age in the LCL group was 36 years (95% CI: 27.9-43.1) and mean follow-up period was 22.2 months (minimum 12 months). The talonavicular coverage angle (P=0.002) and calcaneal pitch (P=0.002) of the LCL group showed significant higher improvement than that of the dynamic-MCS group. The talocalcaneal angle (P=0.030) and hindfoot alignment angle (P=0.005) of the dynamic-MCS group showed significant higher improvement than that of the LCL group. The improvement of the other radiographic parameters showed no significant difference between the dynamic-MCS group and the LCL group (Fig 1-B). Conclusion: Radiographic outcomes between the dynamic-MCS and the LCL were different for flatfoot correction in this study. The LCL showed higher correction of forefoot abduction than the dynamic-MCS. The dynamic-MCS showed higher correction of heel valgus than the LCL. Correction of flat longitudinal arch was not different between the dynamic-MCS and the LCL. To restore the flat longitudinal arch,the dynamic-MCS corrected the plantar-flexed talus and the LCL corrected the low calcaneal pitch. Lateral plantar pain and calcaneocuboid arthrosis did not occurred after the dynamic-MCS in our experience. We concluded that the dynamic-MCS could be a good treatment option for flexible flatfoot.

Endoscopic Flexor Hallucis Longus Tendon Transfer for Chronic Achilles Tendon Rupture.

Chronic Achilles tendon rupture posed significant disability to the patients. Flexor hallucis longus (FHL) transfer can be used to restore the plantarflexion power of the ankle. Traditionally, a long medial incision with extensive soft tissue dissection is needed for FHL transfer. With the advance in flexor hallucis tendoscopy, endoscopic FHL tendon transfer can be performed without extensive soft tissue dissection.

Outcome of Lateral Transfer of the FHL or FDL for Concomitant Peroneal Tendon Tears.

Concomitant tears of the peroneus longus and brevis tendons are rare injuries, with literature limited to case reports and small patient series. Only 1 recent study directly compared the results of single-stage lateral deep flexor transfer, and no previous series objectively evaluated power and balance following transfer. The purpose of this study was to evaluate clinical outcomes, patient satisfaction, and objective power and balance data following single-stage flexor hallucis longus (FHL) and flexor digitorum longus (FDL) tendon transfers for treatment of concomitant peroneus longus and brevis tears. Over an 8-year period (2005-2012), 9 patients underwent lateral transfer of the FHL or FDL tendon for treatment of concomitant peroneus longus and brevis tears. All but 1 patient underwent additional procedures to address hindfoot malalignment or other contributing deformity at the time of surgery. Mean age was 56.9 years, and average body mass index was 27.9. Lateral transfer of the FHL was performed in 5 patients, and FDL transfer performed in 4 with mean follow-up 35.7 months (range: 11-94). Eight of 9 patients completed SF-12 and Foot Function Index (FFI) scores, and 7 returned for range of motion (ROM) and manual strength testing of the involved and normal extremities. These 7 patients also completed force plate balance tests, in addition to peak force and power testing on a PrimusRS machine with a certified physical therapist. All patients were satisfied with the results of the procedure. Mean SF-12 physical and mental scores were 32 and 55, respectively; mean FFI total score was 56.7. No postoperative infections were noted. Two patients continued to utilize orthotics or braces, and 2 patients reported occasional pain with weightbearing activity. Three patients noted mild paresthesias in the distribution of the sural nerve and 2 demonstrated tibial neuritis. All patients demonstrated 4/5 eversion strength in the involved extremity. Average loss of inversion and eversion ROM were 24.7% and 27.2% of normal, respectively. Mean postoperative eversion peak force and power were decreased greater than 55% relative to the normal extremity. Patients demonstrated nearly 50% increases in both center-of-pressure tracing length and velocity during balance testing. There were no statistically significant differences between the FHL and FDL transfer groups with regards to clinical examination or objective power and balance tests. The FHL and FDL tendons were both successful options for lateral transfer in cases of concomitant peroneus longus and brevis tears. Objective measurements of strength and balance demonstrated significant deficits in the operative extremity, even years following the procedure. These differences, however, did not appear to alter or inhibit patient activity levels or high satisfaction rates with the procedure. Although anatomic studies have demonstrated benefits of FHL transfer over the FDL tendon, further studies with increased patient numbers are needed to determine if these differences are clinically significant. Level IV, retrospective case series.