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  • Title: Radiologic Changes by Early Motion in Neck Fractures of the Fifth Metacarpal Treated with Antegrade Intramedullary Fixation.
    Author: Heo YM, Kim SB, Yi JW, Kim TG, Lim BG.
    Journal: J Hand Surg Asian Pac Vol; 2016 Feb; 21(1):30-6. PubMed ID: 27454499.
    Abstract:
    BACKGROUND: As intramedullary (IM) fixation is one of the fixation methods used in neck fractures of the fifth metacarpal, an early motion of injured finger can be allowed. The purpose of this study is to evaluate whether immediate active motion affects the stability of antegrade IM fixation in surgical treatment of neck fractures of the fifth metacarpal bone and to assess related factors. METHODS: Thirty one patients treated by closed reduction and antegrade IM fixation were consecutively enrolled. All patients started active motion of the little finger since 7 postoperative days and only daily activities including writing, typing or washing were allowed until the union of fracture. All fractures were healed within four to eight weeks. The changes of angulation, fifth metacarpal length and tip to head distance of K-wire were compared between immediate postoperative radiographs and radiographs at eight weeks. In addition, the effects by age, gender, initial angulation and comminution of the metacarpal neck were assessed. RESULTS: The average change of angulation was 0.12°, 5th metacarpal length was 1.49mm and tip to head distance of K-wire was 1.31mm. There was no significant difference in the change of angulation (p = 0.137). But, there were significant differences in the change of 5th metacarpal length and tip to head distance of K-wire ([Formula: see text]). The change of angulation was related to a comminution of the metacarpal neck and that of 5th metacarpal length was related to age and sex. CONCLUSIONS: The change of 5th metacarpal length and tip to head distance of K-wire can occur by an early mobilization in the antegrade IM fixation for neck fractures of the fifth metacarpal. However, we thought that an early active motion after surgery is important to increase the patients' satisfaction, even though careful selection of candidates is necessary.
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