BackgroundWe have conducted a retrospective review of 19 patients for whom 20 separated ossicles of the lateral malleolus were excised arthroscopically. We examined the operating methods, findings, and overall results.MethodsThe patients’ indications for this procedure were as follows. The main complaints were pain alone; ossicle sizes were small and ankle instability was minimal. There were 12 ankles of 12 males and eight ankles of seven females. The patients’ average age was 17.6 years. A 2.7-mm, 30° arthroscope was inserted into the ankle joint through the anterolateral portal. Instruments were inserted through the accessory anterolateral portal, and ossicles were removed piece by piece. Talar tilt angles and anterior displacements were examined and compared before and after surgery by use of stress radiographs. Japanese Society for Surgery of the Foot (JSSF) ankle/hindfoot scales were assessed pre and postoperatively.ResultsAll patients recovered their original levels of activity. The mean talar tilt angle changed from 6.1° ± 2.4° preoperatively to 6.0° ± 1.8° postoperatively (p = 0.93), and the mean anterior displacement changed from 5.9 ± 1.7 mm preoperatively to 6.1 ± 2.0 mm postoperatively (p = 0.42). Average JSSF ankle/hindfoot scale improved from 77.6 ± 2.6 points preoperatively to 97.2 ± 5.2 points postoperatively (p < 0.01).ConclusionsArthroscopic excision of separated ossicles of the lateral malleolus achieved good results with minimum incisions, and relatively early resumption of daily and sports activity was possible. However, when the ossicles were embedded within the fibers of the anterior talofibular ligament, it was impossible to avoid cutting of ligament fibers. To reduce the possibility of ligament dysfunction, we believe postoperative treatment should conform to the accepted method for treatment of acute ankle sprains.
Background Hallux valgus deformity has been reported to be associated with increased postural sway. However, the direction and magnitude of postural sway associated with hallux valgus remain inconclusive. We assessed the association between hallux valgus deformity and postural sway using a force plate. Methods The subjects were 169 healthy volunteers, > 40 years old (63 males, 106 females, average age: 66.0 ± 12.4 years old), who took part in an annual medical examination. We investigated the photographic hallux valgus angle (°), total trajectory length of the gravity center fluctuation (mm), area of the center of pressure (mm2), mediolateral and anteroposterior postural sway (mm) in a standing position with 2-legged stance and eyes open, hallux pain (Numerical Rating Scale), trunk and lower limb muscle mass (kg). We classified the subjects into a hallux valgus group (n = 44, photographic hallux valgus angle of 1 or both feet ≥ 20°) and a no hallux valgus group (n = 125, photographic hallux valgus angle of both feet < 20°) and analyzed the relationship between hallux valgus and postural sway. Results The anteroposterior postural sway in the hallux valgus group (6.5 ± 2.8) was significantly greater than in the no hallux valgus group (5.4 ± 2.2, p = 0.014), and the lower limb muscle mass in the hallux valgus group (12.4 ± 2.2) was significantly smaller than in the no hallux valgus group (13.5 ± 3.2, p = 0.016). The total value of the photographic hallux valgus angle on both feet was positively correlated with the anteroposterior postural sway (p = 0.021) and negatively correlated with the lower limb muscle mass (p = 0.038). The presence of hallux valgus (p = 0.024) and photographic hallux valgus angle (p = 0.008) were independently related to the magnitude of anteroposterior postural sway. Conclusions Hallux valgus deformity and its severity were positively associated with the magnitude of the anteroposterior postural sway. Trial registration 2017 − 135. Registered 22 August 2017.
Category: Ankle; Trauma Introduction/Purpose: Posterior malleolar fracture reduction including the articular surface of trimalleolar ankle fracture has been reported to be an important prognostic factor. The lateral trans-malleolar approach (LTA) is a surgical approach that provides direct visualization of the articular surface of the posterior malleolus. We herein report the clinical results and computed tomography (CT) findings for the articular reduction status after LTA for posterior malleolar fracture of the ankle. Methods: Sixteen patients (9 men, 7 women, mean age 52.6+-18.1 years old) who underwent the LTA for posterior malleolar fracture of the ankle and were followed for at least 1 year were evaluated retrospectively. The types of ankle malleolar fracture according to the Lauge-Hansen classification were Supination-External rotation (SER) in 13 patients and Pronation-External rotation (PER) in 3 patients. The CT classifications of posterior malleolus fracture by Haraguchi were Type 1 in 6 cases, Type 2 in 10 cases and Type 3 in 0 cases. The AOFAS score, post-surgical complications and reduction status of the posterior malleolus on CT were investigated. Results: The mean follow-up period was 15.5 months. The AOFAS score was 93.0+-5.2 points. Postoperative complications were seen in one case of superficial infection; however, delayed union, nonunion and fibular necrosis were not observed. The articular step-off in CT improved significantly after surgery (5.9+-2.9 mm preoperatively vs. 0.6+-0.8 mm postoperatively). The 2 patients who showed an articular step-off exceeding 1 mm were both Haraguchi type 2 posterior malleolar fracture. Conclusion: Several approaches for managing posterior malleolus of the ankle have been reported. However, few provide direct visualization to the articular surface. The LTA requires relatively substantial invasion, but it can facilitate surgery in the supine position and thereby reduce the articular surface directly. In our experience, the LTA provided favorable clinical results and fracture reductions. Even when utilizing the LTA, it remains difficult to confirm the fracture reduction of medial articular surface for Haraguchi type 2 medial extension fractures. Therefore, it remains important to also perform appropriate intraoperative X-ray controls.
Dislocation of the peroneal tendons is one of the major injuries of the ankle. However, the pathology underlying this condition is still unclear. The purpose of this study was to evaluate the anatomical features of dislocation of the peroneal tendon using MRI. Methods: We compared twenty cases of dislocation of the peroneal tendon and twenty three controls. Both groups were matched for age, gender and BMI. The following patients were excluded: those with an acute injury within the past three weeks and/or findings of peroneal tendon tears or a dislocated peroneal tendon on MRI. MRI axial images of the ankle were retrospectively observed and the shape (concave, convex or flat) of the posterior fibular malleolar groove and the soft tissue dimensions within the peroneal tendon sheath at the level of the ankle joint (joint level) and the middle level between the ankle joint and the fibular malleolar tip (lower level) were investigated. The measurement was performed using a Konica i-pacs SX measurement system (Konica Minolta Health Care, Tokyo, Japan). Results: No significant differences were observed in the shape of the posterior fibular malleolar groove at both levels (Joint level,
Background: Preoperative arthroscopic examinations were carried out in patients with varus deformity among those with osteoarthritis of the ankle caused by malalignment, and to assess the severity of the disease on the basis of the arthroscopic findings, and the associations of these findings with X-ray findings and the indications for supramalleolar osteotomy were evaluated.Methods: A total of 57 joints in 56 patients were investigated, and the mean follow-up period was 4 years. The proportion of the surface area of the ankle that had become hardened into an eburnation was classified according to a five-grade scale on the basis of preoperative arthroscopy: Grade 1 indicated fibrillation of the articular cartilage alone with no evident eburnation; Grade 2, eburnation was limited to the medial malleolar articular surface; Grade 3, eburnation extended across the medial shoulder of the talus, but covered <25% of the talocrural joint; Grade 4, eburnation covered ≥25% but <50% of the talocrural joint; and Grade 5, eburnation covered ≥50% of the talocrural joint. The surgical procedure used was lateral closing wedge osteotomy, and assessments were carried out using Takakura, et al.'s clinical score and Tanaka, et al.'s radiographic grading system.Results: Initially, 3 joints were Grade 1, 19 were Grade 2, 15 were Grade 3, 16 were Grade 4, and 4 were Grade 5. Postoperatively, 30 joints were Grade 1, 14 were Grade 2, 7 were Grade 3, 4 were Grade 4, and 2 were Grade 5. Clinical scores showed an improvement from 63.9±11.2 points preoperatively to 81.9±13.2 points postoperatively. Conclusion:Patients who were classed as Grade 3 or below by preoperative arthroscopy showed improved clinical outcomes and radiographic grades. To assess the proportion of cartilage, that may be affect postoperative outcomes, preoperative arthroscopy should be done prior to the supramalleolar osteotomy.
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