Minimal resection interposition arthroplasty of the first metatarsophalangeal joint

BackgroundInterposition arthroplasty of the first metatarsophalangeal (MTP) joint is a viable alternative to fusion in patients with advanced hallux rigidus. The purpose of this study is to evaluate the midterm results of a modification of the technique.MethodsCase series of 18 interposition arthroplasties were performed on 13 female patients with Grade III–IV hallux rigidus. The technique included cheilectomy, bunionectomy when needed, minimal resection of the base of the proximal phalanx and interposition of a fascia lata allograft in the first metatarsophalangeal joint. Mean follow up was nine years (range 75–136 months). Patients were evaluated according to the AOFAS score, the ability to tip toe and their subjective satisfaction.ResultsThere was a significant difference between preoperative (mean 43.2, range 15–83) and postoperative (mean 77.3, range 40–100) AOFAS scores (p < 0.001). The patients were able to tip toe on 12 of the 18 operated feet and 9 of the 13 patients were satisfied from the operation. All dissatisfied patients had a coexistent hallux valgus deformity.ConclusionsThe technique had satisfactory midterm outcomes in older patients with advanced hallux rigidus without hallux valgus. Advantages of the method are the preservation of tip toe function in most patients and a technically easy conversion to fusion when needed.     

颈椎脱位治疗策略

目的：探讨颈椎脱位治疗方法选择。方法：颈椎脱位患者39例,男29例,女10例;年龄6～74岁,平均为40岁。脱位节段：C1,215例,C3,41例,C4,59例,C5,69例,C6,75例。脊髓损伤按Frankel分级：A级9例,B级8例,C级5例,D级8例,E级8例,仅有神经根症状1例。32例进行了早期、快速、重量递增的牵引治疗。17例进行手术治疗。结果：牵引复位成功率90%,脊髓损伤平均改善0.63级。死亡6例,均为关节突交锁并严重脊髓损伤病例。结论：快速复位牵引治疗颈椎脱位,需密切观察病情,严防牵引过度。是否手术应根据复位情况、MRI表现、脊髓损伤及全身状况与条件综合考虑。     

完全脱钙松质骨的生物学特性*★

背景：脱钙松质骨被认为是一种“理想”的软骨组织工程支架材料已被广泛应用，但对其某些生物学特征目前仍不是十分清楚。 目的：体外观察脱钙骨基质的降解性能、孔隙率以及骨髓间充质干细胞和脱钙骨基质的黏附性。 设计、时间及地点：体外观察实验，分别于2005-01-08/04-15在兰州大学骨科研究所和2007-08-01/11-15在桂林医学院中心实验室进行。 材料：取青紫兰兔四肢骨干骺端及椎体松质骨，采用Urist提供的方法制作脱钙骨基质。 方法：将脱钙骨基质置于磷酸盐缓冲溶液中测定其降解率；用液体置换法测其孔隙率；用细胞计量法测定生长良好的浓度为1× 108 L-1的第3代骨髓间充质干细胞与脱钙骨基质的黏附率。 主要观察指标：脱钙骨基质的降解率、孔隙率及骨髓间充质干细胞与脱钙骨基质的黏附率。 结果：脱钙骨基质的降解随时间的延长逐渐加速，完全降解需要10~12周；所测孔隙率为(77.15±3.44)%；浓度为1×108 L-1的第3代骨髓间充质干细胞与脱钙骨基质具有较高的黏附率(平均为71.25%)。 结论：脱钙骨基质的降解曲线和骨髓间充质干细胞的增殖曲线相一致，具备良好的孔隙率和黏附率，提示脱钙骨基质可能为软骨组织工程比较理想的生物支架材料。 关键词：脱钙骨基质；降解率；孔隙率；黏附率；骨髓间充质干细胞 doi:10.3969/j.issn.1673-8225.2009.47.011     

改良足外侧皮瓣修复足跟及跟腱区皮肤软组织缺损

目的:评价以腓动脉终末支为血供的足外侧皮瓣修复足跟及跟腱区皮肤软组织缺损的临床疗效。方法:采用改良足外侧皮瓣转移方法对23例外伤致足跟和(或)跟腱部皮肤缺损的患者进行治疗。其中男16例,女7例;年龄6～48岁,平均36.8岁。结果:皮瓣全部成活。供瓣区植皮创面均Ⅰ期愈合。经5个月～9年随访,平均3年5个月,皮瓣无臃肿感,颜色正常,质地柔软耐磨,无压迫性溃疡发生。结论:应用腓动脉终末支为血供的足外侧皮瓣局部转移或形成岛状皮瓣修复跟腱和足跟区软组织缺损,解剖简便,修复后外观及功能恢复良好,是临床上修复足跟及跟腱区皮肤软组织缺损的良好选择。