Prieskorn D W, Mann R A, Fritz G
Botsford General Hospital, Farmington Hills, Michigan 48336, USA.
Foot Ankle Int. 1996 Jun;17(6):331-3. doi: 10.1177/107110079601700606.
Hypermobility of the first metatarsal cuneiform joint has been implicated as a cause of the hallux valgus deformity. The objective definition of hypermobility at this joint, however, has not been clearly defined. We used a modified Coleman block test to accentuate motion at the first metatarsal cuneiform joint in order to measure physiologic limits of motion in vivo. This motion was compared with radiographic analysis of the feet, which included the hallux valgus angle, intermetatarsal angle, and medial cortical thickening at the midshaft of the second metatarsal. This assessment was performed on 100 feet (50 right feet and 50 left feet in 50 patients). The average intermetatarsal angle was 8.7 degrees (range, 4-14 degrees), the average hallux valgus angle was 11 degrees (range, 4 degrees of varus to 30 degrees of valgus), and the average midshaft medial cortical thickness was 3.2 mm (range, 2.0-5.5 mm). Pearson's correlation coefficient was calculated to compare these factors. The relationship between variables was found to be small (r < or = 0.2). Motion was noted to occur in the normal foot at this joint and a range of normal values for medial cortical thickness was identified.
第一跖楔关节活动度过大被认为是拇外翻畸形的一个原因。然而，该关节活动度过大的客观定义尚未明确界定。我们使用改良的科尔曼阻滞试验来增强第一跖楔关节的活动，以便测量体内的生理活动限度。将该活动与足部的影像学分析进行比较，影像学分析包括拇外翻角、跖间角以及第二跖骨干中段的内侧皮质增厚情况。对50例患者的100只脚（50只右脚和50只左脚）进行了此项评估。平均跖间角为8.7度（范围为4 - 14度），平均拇外翻角为11度（范围为内翻4度至外翻30度），平均骨干中段内侧皮质厚度为3.2毫米（范围为2.0 - 5.5毫米）。计算了皮尔逊相关系数以比较这些因素。发现变量之间的关系较小（r≤0.2）。注意到正常足部在该关节处会出现活动，并确定了内侧皮质厚度的一系列正常值。
