Toe Metatarsophalangeal Research Articles

Early Outcomes Following Plantar Condylectomy and Imbrication of Plantar Plate to Metatarsal Neck for Metatarsalgia and Grade 0 Lesser Toe Metatarsophalangeal Joint Instability

Background: Metatarsalgia and plantar plate tears are characterized by forefoot pain and toe deformity in severe cases. Conservative management may slow progression of symptoms; however, definitive treatment often requires operative intervention. The purpose of this observational study was to evaluate the combination of plantar condylectomy and surgical imbrication of the plantar plate to the metatarsal neck to repair grade 0 plantar plate injuries. Methods: We retrospectively identified 22 patients with metatarsalgia and low-grade plantar plate lesions (grade 0), operated between 2018 and 2021, who underwent operative repair involving plantar metatarsal condylectomy and proximal surgical imbrication of the plantar plate to the metatarsal neck. Fourteen patients underwent concomitant hallux valgus correction. Data collection was performed preoperatively and postoperatively and included Patient-Reported Outcomes Measurement Information System (PROMIS) physical function (PF) and pain interference (PI) scores. Paired Wilcoxon signed-rank tests compared PROMIS PF and PI scores at patients’ preoperative, 6-9-week, 3-4-month, 5-6-month, and ≥9-month follow-up evaluations ( P < .05). Results: Compared to their preoperative visit, patients demonstrated modest improvement in their PROMIS (pain and physical function) scores over the first ≥9 months postoperatively (median 13.0 months). Median preoperative and most recent PROMIS physical function scores were 40.5 (95% CI: 36-49) and 44.5 (95% CI: 40-52), respectively. Median PROMIS pain interference scores changed from 62.5 (95% CI: 56-67) to 56.0 (95% CI: 51-62). Improvement in pain and function was sustained in patients available for postoperative follow-up. Conclusion: In this small, early follow-up series, we found that plantar condylectomy and surgical imbrication of the plantar plate to the metatarsal neck was modestly helpful to treat metatarsalgia and grade 0 plantar plate injuries. Level of Evidence: Level IV, retrospective case series.

Vascular Supply to the Proximal Plantar Plate of Lesser Toe Metatarsophalangeal Joint is Primarily Supplied by the Attachment to the Metatarsal: A Nano-CT Microvasculature Study

Category: Lesser Toes Introduction/Purpose: Lesser toe metatarsophalangeal (MTP) instability is implicated in common forefoot pain and deformities. The plantar plate is a major stabilizing structure of the MTP joint with instability frequently occurring after a tear or attenuation of this structure. Previous studies have demonstrated that the blood supply to the proximal plantar plate comes from both the metatarsal and the plantar fascia. Commonly, a McGlamry elevator is used to strip the plantar plate from the plantar surface of the metatarsal to improve exposure of the MTP joint. The vascular consequence of stripping the plantar plate from the metatarsal is not yet well understood. The purpose of this study is to quantify the relative contribution of blood supply to the proximal plantar plate from the metatarsal and plantar fascia. Methods: Twelve fresh-frozen human adult cadaver lower extremity specimens were utilized for this study, resulting in 35 lesser MTP joints that were studied. All specimens were between the ages of 18 and 65 years and had no history of diabetes, peripheral vascular disease, or connective tissue disorders. Specimens with a history of trauma to the foot or ankle, prior foot or ankle surgery, or evidence of clinical deformity of less toes upon inspection were excluded. The specimens were prepared as described previously in Finney et al. The anterior and posterior tibial arteries were perfused with a barium solution and counterstained with phosphomolybdic acid. The second through fourth MTP joints of 12 feet were imaged with nano-computed tomography (nano- CT) at 14-micron resolution. Reconstructed 3D and 2D CT images were utilized for analysis of the volume of vasculature along the metatarsal pedicle and plantar fascia of the proximal plantar plate. Results: Based on nano-CT imaging, the plantar plate specimen demonstrated microvascular infiltration at the proximal attachments of the metatarsal neck, interosseous muscles, periosteum, and plantar fascia (Figure 1). An average of 63.5% of the vascular supply to the proximal portion of the plantar plate entered from the metatarsal pedicle in 35 lesser toe specimens analyzed. The remaining 36.5% of the vascular supply entered from the plantar fascia. The second toes, third toes, and fourth toes had an average of 64.7%, 59.0%, and 67.1% of vasculature supply from the metatarsal pedicle, respectively. The average volume of vasculature from the metatarsal pedicle to the proximal plantar plate was 0.38 mm3, while the average volume of vasculature from the plantar fascia to the proximal plantar plate was 0.19 mm3. Conclusion: The vascular supply of the proximal plantar plate is supplied from both the metatarsal pedicle and plantar fascia. Using the McGlamry elevator for exposure of the MTP joint disrupts the dominant tributary for proximal plantar plate perfusion.

Surgical Imbrication of Plantar Plate to Metatarsal Neck in the Setting of Lesser Toe Metatarsophalangeal Joint Instability

Category:Lesser Toes; Midfoot/ForefootIntroduction/Purpose:Persistent metatarsalgia refractory to non-operative therapy with accompanying plantar plate injury represents a common and challenging treatment problem. In previous studies, radiofrequency shrinkage has been used for the treatment of MTP joint instability secondary to low-grade plantar plate lesions.1 In the shoulder, this technique shows histological evidence of modest regenerative capacity but is also associated with several chronic sequelae including capsular stretching, nerve damage, recurrent instability, adhesive capsulitis, and thermally-induced chondrolysis.2-6 The purpose of this observational study was to examine the efficacy of surgical imbrication of the plantar plate to the metatarsal neck as a novel, cost-effective approach to repair Grade 0-1 plantar plate injuries. We sought to characterize patient-reported and radiographic outcomes in patients undergoing this procedure.Methods:Patients from a single fellowship-trained orthopaedic surgeon (1/2017 - 12/2020) were screened by electronic medical record review. Inclusion criteria were age >18 years, a pre-operatively measured Patient-Reported Outcomes Measurement Information System (PROMIS) score, a Grade 0 or 1 plantar plate tear discovered at time of surgery, and repair via surgical imbrication to the metatarsal neck. PROMIS Physical Function and Pain Interference scores were obtained from 14 enrolled patients (median age was 55 years; range: 40-69; 12 female) post-operatively at 6-9 weeks, 3 months, 6 months, and 1-2 years.Basic demographic information and pertinent medical information were also obtained. Three fellowship-trained orthopaedic surgeons independently reviewed radiographs to assess reduction of the metatarsophalangeal joint, and joints were graded as reduced, subluxated, or dislocated. Wilcoxon signed-rank tests compared pre- and post-operative PROMIS scores. Changes in PROMIS scores were compared to numerical and categorical patient characteristics via univariate linear regressions and Mann- Whitney U-tests, respectively.Results:Median postoperative times to most recent PROMIS score and radiographs were respectively 13.0 months (95% confidence interval: 10.0-21.4) and 7.6 months (2.9-10.0). Median preoperative and most recent Physical Function scores were 39.5 (35-50) and 52.5 (41-62), respectively (p=0.003), and median Pain Interference scores changed from 61.0 (56-68) to 53.5 (39- 58) (p=0.002) (Fig. 1). Changes in PROMIS scores showed no association with BMI, age, preoperative opioid use, wound complications, concomitant dislocation, fibromyalgia, or mood disorder (p>0.10). Preoperatively, 9 second MTP joints were concentrically reduced, and 5 were subluxated (n=14). At 6 weeks post-operation, 13 joints remained reduced (n=14). At most recent measurement, all (n=10) joints were reduced (4 patients missing data). 9 of 14 patients underwent concomitant correction of hallux valgus at time of surgery.Conclusion:Patients with Grade 0-1 plantar plate injuries improved significantly in radiographic parameters and patient reported outcome scores following surgical imbrication of the plantar plate to the metatarsal neck. This procedure represents a novel, alternative approach that is both efficacious and cost-effective. Our work contributes valuable surgical outcomes data to a limited knowledgebase regarding pathophysiology and management for low-grade plantar plate lesions in MTP joint instability. Future work will involve larger, prospective studies to better understand outcomes of and indications for this approach.

Allograft Interposition Bone Graft for First Metatarsal Phalangeal Arthrodesis: Salvage After Bone Loss and Shortening of the First Ray.

Previous studies have demonstrated success in using autogenous bone graft for arthrodesis in patients with failed surgeries of the hallux. These patients have several causes for pain and dysfunction preoperatively, including a shortened first ray, nonunion, and poor hallux alignment. In this study, a consecutive series of 36 patients (38 procedures) were treated with a patellar wedge interposition structural allograft to salvage bone loss from great toe arthrodesis malunion, painful joint replacement, failed osteotomy, or infection of the great toe metatarsophalangeal (MP) joint with shortening of the first ray. The goals of the surgery were to restore length to the first ray and provide a stable MP joint fusion to relieve pain. The 38 treated toes were evaluated for preoperative and postoperative American Orthopaedic Foot & Ankle Society (AOFAS) MP scores, subjective patient outcome scores, and clinically successful fusion of the hallux. At a minimum 1-year follow-up (mean, 3.2 years), all but 2 feet healed with a solid fusion, and all healed patients reported good or excellent outcomes. AOFAS MP scores averaged 43.5 preoperatively and 77.2 postoperatively. Three patients with infection as cause for nonunion of the initial procedure were treated with staged procedures, including the use of a temporary antibiotic spacer and mini external fixator; all 3 healed without recurrent infection. One patient had a fracture of her allograft following her interposition arthrodesis, but it fused successfully after a second interposition arthrodesis surgery. Two patients developed a nonunion of the revision arthrodesis. The use of an interposition patellar wedge allograft can restore length to the first ray and provide successful salvage of arthrodesis nonunions and bone loss from failed hemiarthroplasty and total joint implants of the great toe MP joint. Level IV, retrospective case series.

Presence of Neovascularization in Torn Plantar Plates of the Lesser Metatarsophalangeal Joints.

Recent surgical techniques have focused on anatomic repair of lesser toe metatarsophalangeal (MTP) plantar plate tears, yet it remains unknown whether the plantar plate has the biological capacity to heal these repairs. Therefore, a better understanding of the plantar plate vasculature in response to injury may provide further insight into the potential for healing after anatomic plantar plate repair. Recently, a study demonstrated that the microvasculature of the normal plantar plate is densest at the proximal and distal attachments. The purpose of this study was to compare the intact plantar plate microvasculature network to the microvasculature network of plantar plates in the presence of toe deformity using similar perfusion and nano-computed tomographic (CT) imaging methods. Seven fresh-frozen human cadaveric lower extremities with lesser toe deformities including hammertoe or crossover toe were perfused using a barium solution. The soft tissues of each foot were counterstained with phosphomolybdic acid (PMA). Then using nano-CT imaging, the second through fourth toe metatarsophalangeal joints of 7 feet were imaged. These images were then reconstructed, plantar plate tears were identified, and 11 toes remained. The plantar plate microvasculature for these 11 toes was analyzed, and calculation of vascular density along the plantar plate was performed. Using analysis of variance (ANOVA), this experimental group was compared to a control group of 35 toes from cadaveric feet without deformity and the vascular density compared between quartiles of plantar plate length proximal to distal. A power analysis was performed, determining that 11 experimental toes and 35 control toes would be adequate to provide 80% power with an alpha of 0.05. Significantly greater vascular density (vascular volume/tissue volume) was found along the entire length of the plantar plate for the torn plantar plates compared to intact plantar plates (ANOVA, P < .001). For the first quartile of length (proximal to distal), the vascular density for the torn plantar plates was 0.365 (SD 0.058) compared to 0.281 (SD 0.036) for intact plantar plates; in the second quartile it was 0.300 (SD 0.044) vs 0.175 (SD 0.025); third quartile it was 0.326 (SD 0.051) vs 0.117 (SD 0.015); and fourth (most distal) quartile was 0.600 (SD 0.183) vs 0.319 (SD 0.082). Torn plantar plates showed increased vascular density throughout the length of the plantar plate with an increase in density most notable in the region at or just proximal to the attachment to the proximal phalanx. Our analysis revealed that torn plantar plates exhibit neovascularization around the site of a plantar plate tear that does not exist in normal plantar plates. The clinical significance of the increased vascularity of torn plantar plates is unknown at this time. However, the increase in vasculature may suggest that the plantar plate is a structure that is attempting to heal.

A Comparison of Microvasculature of Normal versus Torn Lesser Toe Metatarsophalangeal Joint Plantar Plates Using Nano-CT Imaging

Category:Lesser ToesIntroduction/Purpose:Recent surgical techniques have focused on anatomic repair of lesser toe metatarsophalangeal (MTP) plantar plate tears. MTP instability has been implicated in a number of common toe deformities as well as metatarsalgia. Recently, a study demonstrated that the microvasculature of the normal plantar plate is densest at the proximal and distal attachments. The purpose of this study was to compare the intact plantar plate microvasculature network to the microvasculature network of plantar plates in the presence of toe deformity using similar perfusion and nano-CT imaging methods.Methods:Eight fresh frozen human cadaveric lower extremities with lesser toe deformities including hammertoe or crossover toe were perfused using a barium solution. The soft tissues of each foot were counterstained with phosphomolybdic acid (PMA). Then using nano-CT imaging the second through fourth toe metatarsophalangeal joints of 8 feet were imaged. These images were then reconstructed, plantar plate tears were identified, and eleven toes remained. The plantar plate microvasculature for these eleven toes was analyzed and calculation of vascular density along the plantar plate was performed. Using ANOVA analysis this experimental group was compared to a control group of 35 toes from cadaveric feet without deformity and the vascular density compared between quartiles of plantar plate length proximal to distal.Results:Demonstrated in Figure 1, of the torn plantar plates the average percent vascular density (vascular volume/tissue volume) in the first quartile of length (proximal to distal) is 0.365 (SD 0.058) compared to 0.281 (SD 0.036) for intact plantar plates; in the second quartile it is 0.300 (SD 0.044) vs 0.175 (SD 0.025); third quartile it is 0.326 (SD 0.051) vs 0.117 (SD 0.015); and fourth (most distal) quartile is 0.600 (SD 0.183) vs 0.319 (SD 0.082) respectively. Using ANOVA testing all differences were found to be significant to p<0.001.Conclusion:Torn plantar plates demonstrate increased vascular density throughout the length of the plantar plate with an increase in density most notable in the region at or just proximal to the attachment to the proximal phalanx. The clinical significance of the increased vascularity of torn plantar plates is unknown at this time. However, the increase in vasculature may suggest that the plantar plate is a structure that is attempting to heal.

Allograft Interposition Bone Graft for First Metatarsal Phalangeal Arthrodesis: Salvage after Bone Loss and Shortening of the First Ray

Category:Bunion; Midfoot/Forefoot; OtherIntroduction/Purpose:Previous studies have demonstrated success in using autogenous bone graft for arthrodesis in patients with previously failed surgeries of the hallux. These patients have several causes for pain and dysfunction preoperatively, including shortened first ray, nonunions, and poor hallux alignment. In this study, a consecutive series of 36 patients (38 procedures) were treated with a patellar wedge interposition structural allograft to salvage bone loss from great toe arthrodesis malunion, painful joint replacement, failed osteotomy, or infection of the great toe metatarsophalangeal (MP) joint with shortening of the first ray. The goals of the surgery were to restore length to the first ray and provide a stable MP joint fusion to relieve pain.Methods:The 38 treated toes were followed for at least one year and were evaluated for preoperative and postoperative American Orthopaedic Foot & Ankle Society (AOFAS) MP scores, subjective patient outcome scores, and clinically successful fusion of the hallux.Results:At a minimum one-year follow-up, all but two feet healed with a solid fusion, and all patients reported good or excellent outcomes. AOFAS MP scores averaged 43.5 preoperatively and 77.2 postoperatively. Three patients with infection as cause for nonunion of the initial procedure were treated with staged procedures, including the use of a temporary antibiotic spacer and mini external fixator; all three healed without recurrent infection. One patient had a fracture of her allograft following her interposition arthrodesis, but fused successfully after a second interposition arthrodesis surgery. Two patients developed a nonunion of the revision arthrodesis.Conclusion:In conclusion, the use of an interposition patellar wedge allograft can restore length to the first ray and provide successful salvage of arthrodesis nonunions and bone loss from failed hemi and total joint implants of the great toe MP joint.

Outcomes of Polyvinyl Alcohol Hydrogel Implant of the Lesser Metatarsals.

Lesser toe metatarsophalangeal (MTP) joint pathology presents a challenge for surgical treatment. At our institution, arthroplasty using a polyvinyl alcohol (PVA) hydrogel implant has been utilized in the second and third MTP joints for advanced arthritis, failed management of Freiberg's infraction, and osteochondral defects. We present a case series describing the clinical outcomes of 13 patients following PVA implantation of the second or third MTP. We retrospectively identified 13 patients (14 joints) who underwent PVA hydrogel implantation of the second (n = 12) or third (n = 2) metatarsal between 2017 and 2019. The average age was 49 (range, 20-67) years, with 100% females. Patient-Reported Outcomes Measurement Information System (PROMIS) scores were collected preoperatively and at an average of 21.1 (range, 8.3-29.2) months postoperatively. Clinical outcomes were also evaluated. The average time to clinical follow-up was 24.7 (range, 7-35.8) months. On average, patients demonstrated pre- to postoperative improvement in all PROMIS domains, with significant improvements in Pain Intensity (P = .01) and Pain Interference (P = .01). Five postoperative complications were observed: 1 case of persistent avascular necrosis, 1 revision with implant removal and bone grafting, 1 periprosthetic fracture, and 2 recurrences of pain requiring ultrasound-guided injection. This study represents the largest case series to date evaluating the use of PVA implant in the surgical correction of lesser toe MTP joint pathology. While the PVA implant presents a viable option in the setting of advanced arthritis, Freiberg's infraction, and certain osteochondral defects, it is not without complications. The specific indications for use of the PVA implant should be carefully considered. Level IV, case series.

Percutaneous Bunionette Correction: Retrospective Case Series.

Introduction. Bunionette is a deformity of the fifth metatarsal in which there is a painful lateral bony prominence of the distal region of this bone caused by various anatomical and biomechanical changes. The aim of this study is to report on a minimally invasive technique without the use of hardware to treat these deformities. Methods. This is a case series of 18 patients, 25 feet, who underwent bunionette percutaneous surgical treatment. All patients answered the American Orthopaedic Foot and Ankle Society (AOFAS) scale and the visual analogue pain scale (VAS) preoperatively and at the last follow-up. Standard radiological evaluation included measurement of intermetatarsal (4-5 IMA) and fifth toe metatarsophalangeal (5-MTTP) angles. Time to radiographic consolidation, complications, and satisfaction rate were also documented. Results. The average follow-up was 15.9 months, the AOFAS increased from 49.6 to 92.4 and the VAS decreased from 7.7 to 1.2. It was observed that average 5-MTTP decreased from 15° to 2.7° and that 4-5-IMA decreased from 9.1° to 3.3°. These outcomes showed a statistically significant difference (P < .001). The most common observed complication was the formation of a hypertrophic bone callus in the third postoperative month in three operated feet (12%). One patient had algodystrophy, which improved after conservative treatment. There were no cases of infection, neuropraxis, or recurrences. Fifteen patients rated the result as excellent, 2 as good, and 2 as regular. Conclusion. Percutaneous osteotomy of the fifth metatarsal without the use of hardware is a safe, reproducible technique and presents good clinical and radiographic results for the treatment of bunionette.Levels of Evidence: Therapeutic studies, Level IV: Case series.

Outcome of Lesser Metatarsophalangeal Joint Interpositional Arthroplasty With Tendon Allograft.

Lesser toe metatarsal head degeneration and collapse can cause significant pain and disability. In the setting of global metatarsal head collapse, there are limited operative options. The purpose of our study was to evaluate clinical and radiographic outcomes after lesser toe metatarsophalangeal (MTP) joint interpositional arthroplasty with a tendon allograft and to describe the operative technique. We retrospectively reviewed a consecutive series of patients treated by 3 fellowship-trained foot and ankle surgeons at one institution. We created a phone survey to evaluate satisfaction, pain, and likelihood to repeat the surgery. Foot and Ankle Ability Measure (FAAM) scores were reviewed before and after surgery. Preoperative and postoperative radiographs were evaluated for preservation of metatarsal length. The procedure was performed through a dorsal midline approach. The metatarsal head was reamed to a concave shape. A tendon allograft was fashioned into a ball and secured to the metatarsal with an anchor. Fifteen feet in 14 patients underwent lesser MTP joint interposition arthroplasty, with the average age of 49 years (range, 24-69), and an average follow-up of 4.2 years. Eighty percent (12/15) reported they would have the procedure again. Visual analog scale pain scores showed a decrease in pain from 7 to 1. FAAM sports subscale improved from 56% to 85%. Radiographically, the ratio of the affected metatarsal length to the adjacent metatarsal remained constant before and after surgery, suggesting preservation of the metatarsal cascade. Interpositional arthroplasty of the lesser MTP joints with a rolled tendon allograft provided a unique solution, as it allows the surgeon to fill a large void without harvesting an autograft. This study showed improved patient-reported outcomes, high patient satisfaction, and good radiographic outcomes. Lesser metatarsophalangeal joint allograft interposition arthroplasty was a viable solution as a salvage procedure in the setting of global metatarsal head collapse. Level IV, retrospective case series.

Effects of range of motion exercise of the metatarsophalangeal joint from 2-weeks after joint-preserving rheumatoid forefoot surgery

Objectives: Joint-preserving rheumatoid forefoot surgery improves clinical outcomes, but postoperative range of motion (ROM) of the metatarsophalangeal (MTP) joint remains an issue. The objective of this study was to evaluate the effect of ROM exercise from the early period after lesser toe MTP joint-preserving surgery.Methods: A retrospective, observational study of 22 rheumatoid arthritis patients who underwent modified metatarsal shortening offset osteotomy was completed. Lesser toe scales were administered using the Japanese Society for Surgery of the Foot (JSSF) standard rating system, and the maximum distance of continuous walking was checked to evaluate clinical outcomes. Maximum passive ROM of the lesser toe MTP joints and the extension angle of the 2nd MTP joint at the terminal stance phase during gait were measured and evaluated.Results: Pain scores and ROM-related indices of the JSSF lesser toe scale improved significantly in the exercise group. The extension angle of the 2nd MTP joint at the terminal stance phase during gait was increased, and the maximum distance of continuous walking seemed longer.Conclusion: Passive/active ROM exercise from 2-weeks after surgery can improve a patient’s activity and forefoot function through increasing ROM of the MTP joint at the terminal stance phase.

Microvasculature of the Plantar Plate Using Nano-Computed Tomography.

Lesser toe plantar plate attenuation or disruption is being increasingly implicated in a variety of common clinical conditions. A multitude of surgical techniques and devices have been recently developed to facilitate surgical repair of the plantar plate. However, the microvascular anatomy, and therefore the healing potential in large part, has not been defined. We investigated the microvasculature of the plantar plate by employing a novel technique involving microvascular perfusion and nano-computed tomography (nano-CT) imaging. Twelve human adult cadaveric lower extremities were amputated distal to the knee. The anterior and posterior tibial arteries were perfused with a barium solution. The soft tissues of each foot were then counterstained with phosphomolybdic acid (PMA). The second through fourth toe metatarsophalangeal (MTP) joints of 12 feet were imaged with nano-CT at 14-micron resolution. Images were then reconstructed for analysis of the plantar plate microvasculature and calculation of the vascular density along the length of the plantar plate. A microvascular network extends from the surrounding soft tissues at the attachments of the plantar plate on both the metatarsal and proximal phalanx. The midsubstance of the plantar plate appears to be relatively hypovascular. Analysis of the vascular density along the length of the plantar plate demonstrated a consistent trend with increased vascular density at approximately the proximal 29% and distal 22% of the plantar plate. There is a vascular network extending from the surrounding soft tissues into the proximal and distal attachments of the plantar plate. The hypovascular midportion of the plantar plate may play an important role in the underlying pathoanatomy and pathophysiology of this area. These findings may have significant clinical implications for the reparative potential of this region and the surgical procedures currently described to accomplish anatomic plantar plate repair.

Evaluation of Outcomes Following Lesser Toe Metatarsophalangeal Interpositional Arthroplasty with Semitendinosus Allograft with Description of the Anchovy Technique

Category: Lesser Toes Introduction/Purpose: Lesser toe metatarsal head degeneration and collapse can cause significant pain and disability. If conservative measures fail, there is not a clear surgical solution, particularly in the setting of bone loss. A wide variety of causes of lesser metatarsophalangeal (MTP) joint degeneration exist, including Freiberg’s disease, failure of previous surgery, and primary osteoarthritis. Previous studies have evaluated joint preserving osteotomies; however, they do not offer a solution for complete head collapse. Isolated metatarsal head excision is associated with poor outcomes. The purpose of our study was to evaluate clinical outcomes and review radiologic finding after lesser toe MTP interpositional arthroplasty with semitendinosus allograft and to describe the technique. To our knowledge, this technique and its outcomes have not been described for the lesser toes. Methods: We retrospectively reviewed a consecutive series of patients treated by three foot and ankle trained surgeons at one institution from 2007-2017. We identified sixteen patients who underwent allograft interpostional arthroplasty for the second or third MTP joint. We performed a retrospective chart review to obtain demographics, diagnosis, range of motion, and concomitant procedures. A phone survey was created to evaluate satisfaction, pain, and likelihood to repeat the surgery. Foot and Ankle Ability Measure (FAAM) scores were reviewed. Preoperative and postoperative radiographs were reviewed for preservation of metatarsal lengths and cascade. The procedure was performed through a dorsal midline approach to the MTP joint. Osteophytes were removed and a cannulated reamer created a concavity in the metatarsal head. A semitendinosus allograft was then rolled and sutured into a ball, which was approximately 1.5 cm in diameter. The allograft was secured to the medullary canal with a suture anchor. Results: Fourteen patients underwent 2nd MTP interposition, and two patients underwent 3 rd MTP interposition arthroplasty. The average age of the patients were 51.3 years (median 53.4, range 24-61), and the average follow up was 3.4 years. Seven patients had multiple procedures. The diagnoses included six primary osteoarthritis, four Freiberg’s disease, two failed prior surgery. Preoperative FAAM showed the patients were able to complete 73% of activities of daily living and 63% of sport specific activities. Average MTP dorsiflexion was 27 and 30 degrees before and after surgery, respectively. Radiographically, preoperative metatarsal length ranged from 9.36 - 12.63 cm. Postoperatively, the metatarsal length added to the space filled by the allograft ranged from 9.65 cm - 11.77 cm. Conclusion: Interpositional arthroplasty of the lesser MTP joints with a rolled semitendinosus allograft, secured with a suture anchor, provides a unique solution to a difficult problem. This procedure allows the surgeon to fill a bony void and replace collapsed metatarsal head. This study shows patient reported outcomes based on phone survey and FAAM scores, where pain caused significant limitations before surgery. This study also showed preservation of range of motion after surgery. Radiographic review suggests that length of the affected metatarsal can be maintained, bone voids can be filled, and the cascade of the metatarsals can be preserved.

Angiology of the Plantar Plate

Category: Basic Sciences/Biologics, Lesser Toes, Midfoot/Forefoot Introduction/Purpose: Hammertoes, crossover toes, and claw toes are common deformities and can be a major source of pain and dysfunction. These deformities result from instability of the metatarsophalangeal (MTP) joint due to incompetence of the plantar plate and/or collateral ligaments. Non-operative management is the first line of treatment. When non-operative treatment is unsuccessful, surgical interventions have been described. Newer surgical techniques focus on performing anatomic repairs of plantar plates. The vasculature of the foot has been well studied, but the vascular supply of the plantar plate has not been described. This study presents a new technique for imaging the microvasculature of the lesser toe plantar plates through micro- computed tomography (micro-CT) in order to better understand tear pathology and the capacity of healing with plantar plate repairs. Methods: The posterior tibial and dorsalis pedis arteries of a fresh frozen human cadaver foot were dissected and cannulated at the ankle for perfusion distally. After administration of an anticoagulant, each artery was perfused with Microfil® Silicone Rubber, a contrast agent. The compound was then allowed to cure, and the foot was fixed in formalin. The foot was sectioned through the metatarsal shafts for imaging, and imaging of the lesser toe MTP joints was performed using a Bruker Skyscan 1176 micro-CT scanner at 18 micron slices. Computerized reconstruction of the images was performed for three dimensional visualization of the vasculature. Results: Post-perfusion imaging of the lesser toe MTP joints using micro-CT allows for visualization of the plantar plate microvasculature. Preliminary imaging suggests that micro-CT is a useful modality for analysis of the blood supply of the plantar plate. Conclusion: Anatomic repair of the plantar plate has become a viable treatment option for MTP joint instability. One important question that remains to be answered is whether plantar plate tears have the capacity to heal. We present a novel technique for imaging of lesser toe plantar plate microvascularity using micro-CT. Preliminary results of post-perfusion imaging of the plantar plate are promising for developing a better understanding of its blood supply. Further definition of the plantar plate vascular supply will help clinicians understand the capacity for healing after repairs and may provide some insight to the biological causes plantar plate tears.

Percutaneous bunionette correction

Treatment of tailor's bunion is largely conservative. For severe or refractory cases surgical intervention is necessary. The aim of this study is to evaluate a percutaneous technique for correcting such bunionette deformities. Twenty-one procedures were performed on 20 patients using a percutaneous technique. Patients were scored using the American Orthopaedic Foot & Ankle Society (AOFAS) Lesser Toe Metatarsophalangeal-Interphalangeal Scale. No wound healing problems, infections, non-unions or mal-unions occurred. Functional assessments revealed very good results. Radiographic evaluation confirmed good average correction of the fourth-fifth intermetatarsal angle and metatarsophalangeal angle. This percutaneous technique is a reliable and effective approach for the treatment of bunionette deformity. The results obtained were comparable to those reported using traditional open techniques, but major complications due to soft tissue damage were averted. This technique can be adapted depending on the type of deformity, and does not require internal fixation.

Great toe metatarsophalangeal arthrodesis for hallux valgus deformity in ambulatory adolescents with spastic cerebral palsy

Hallux valgus deformity is a common sequel of spastic cerebral palsy. Twenty ambulatory patients (24 feet) suffering hallux valgus deformity, with painful forefoot and restricted footwear, secondary to spastic cerebral palsy acquired perinatally, were treated with great toe metatarsophalangeal (MTP) arthrodesis using percutaneous K-wires for fixation. The mean age at the time of surgery was 16.2 years (range 14-18 years). They were retrospectively evaluated for the results after arthrodesis at a mean interval of 3 years and 4 months (range 3-4 years) by physical examination and radiographs. All patients had a stable painless aligned great toe, with <10 degrees valgus, <20 degrees dorsiflexion and neutral rotation after arthrodesis, evidenced by improvement in pain, cosmesis, functional activity, footwear, callosities and hygiene, as well as by significant improvement in the measures of the MTP and the intermetatarsal angles (IMA) by postoperative radiographs. Neither non-union (pseudoarthrosis) nor recurrence of the deformity developed. Complications included superficial wound slough in a single case. Using the modified American Orthopaedic Foot Ankle Society (AOFAS) Hallux Metatarsophalangeal-Interphalangeal Scale, 18 feet (75%) were classified as excellent and six feet (25%) as good. Neither fair nor poor cases were recorded. Hallux valgus deformity in adolescents with spastic cerebral palsy is best treated by great toe MTP arthrodesis to improve segmental foot malalignment and dynamic foot deviation.

Surgical management of hallux valgus deformity in children with cerebral palsy.

Twenty-six cases of hallux valgus deformity, in 16 children with cerebral palsy, were managed with great toe metatarsophalangeal (MTP) arthrodesis. Mean age at the time of surgery was 16 years (range, 10 years and 11 months to 21 years and 11 months), and mean follow-up was 4 years and 11 months (range, 2 years and 1 month to 10 years). Significant improvement in the hallux valgus angle (preoperative, 36.3 degrees; follow-up, 9.6 degrees; p < 0.05), the intermetatarsal angle (preoperative, 12.3 degrees; follow-up, 8.4 degrees; p < 0.05), and lateral metatarsophalangeal angle (preoperative, 4.8 degrees; follow-up, 25.8 degrees; p < 0.05), were achieved and maintained after MTP arthrodesis. Functional outcome was documented by significant improvement in the modified American Orthopaedic Foot and Ankle Society Hallux Metatarsophalangeal-Interphalangeal Scale (preoperative mean score, 46.2; follow-up mean score, 90.9; p < 0.05). Patient/ parent/caregiver satisfaction (as determined by a questionnaire), with improvements in cosmesis, footwear, hygiene, activity, and pain were high, ranging from 81% to 100%. Hallux valgus deformity in children with cerebral palsy is best managed by MTP arthrodesis, in conjunction with other surgical procedures that address segmental foot malalignment and dynamic gait deviations.

Cheilectomy for the treatment of hallux rigidus

Hallux rigidus is a painful affliction of the great toe metatarsophalangeal (MTP) joint that results in a marked limitation of dorsiflexion. This limits function in the great toe and can restrict activity in the entire foot. The operation of cheilectomy involves radical removal of osteophytes and a significant portion of normal bone and articular cartilage from the dorsum of the head of the great toe metatarsal to allow improved dorsiflexion at the metatarsophalangeal joint. Simultaneously this results in long-lasting relief of pain. It is a simple procedure with few complications and allows rapid return to greater activity than was previously possible. In the rare event that symptoms are not improved or recur, an arthrodesis of the MTP joint can easily be performed as a salvage procedure.