Journal List > J Korean Soc Surg Hand > v.20(4) > 1106497

Gil, Chung, Shin, Kim, Kang, and Jeon: Modified Split Ulnar Gutter Splint for Treatment of Fifth Metacarpal Neck Fractures

Abstract

Purpose:

To evaluate radiological results of the modified split ulnar gutter splint for the fifth metacarpal neck fracture.

Methods:

Between December 2008 and May 2014, 17 patients (18 cases) with fifth metacarpal neck fractures were managed with our modified split ulnar gutter splint. Radiological outcomes in oblique and lateral radiographs were evaluated. Mean immobilization period was 4.9 weeks (range, 4-7) weeks. Mean follow-up period was 17.1 week (range, 8-80 weeks).

Results:

All of 18 fractures were completely united. The average of prereduction dorsal angulation, 27° in the oblique radiographs and 21° in the lateral radiographs, were corrected to 17° in the oblique radiographs and 10° in the lateral radiographs after closed reduction. At the last follow-up, they were 14° and 11° respectively. The mean difference of angulation deformity between in postreduction and final follow-up radiograms were 3° in the oblique radiographs and 1° in the lateral radiographs, which was not significantly different.

Conclusion:

Immobilization using modified split ulnar gutter splint will be a reliable option for the fifth metacarpal neck fractures in selected patients, which will avoid the surgeries.

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Fig. 1.
Reduction method under image intensifier. Longitudinal traction applied while proximal phalanx was elevated toward dorsal direction and metacarpal shaft put down.
jkssh-20-161f1.tif
Fig. 2.
Molding method of modified split ulnar gutter splint.
jkssh-20-161f2.tif
Fig. 3.
(A) A 50-year-old man sustained a fifth metacarpal neck fracture with 24.5° angulation deformity on oblique radiograph, 18° angulation on lateral radiograph. (B) Post-reduction radiographs show 14.4°, 9° residual angulation on oblique and lateral radiographs, respectively. (C) 24-month follow-up radiographs show good union without any reduction loss or rotationalde deformity.
jkssh-20-161f3.tif
Fig. 4.
(A) A 28-year-old man sustained a fifth metacarpal neck fracture with 16.5° angulation deformity on oblique radiograph, 6° angulation on lateral radiograph. (B) Post-reduction radiographs show 1.6°, 2° residual angulation on oblique and lateral radiographs, respectively. (C) 10-week follow-up radiographs show good union and 2.3°, 2° angulation on oblique and lateral radiographs, respectively.
jkssh-20-161f4.tif
Table 1.
Radiographic angulation in patients treated with closed reduction and ulnar gutter splint immobilization for the fifth metacarpal neck fracture
Variable Radiographic evaluations
Pre-reduction p-value Post-reduction p-value Last follow-up
Anteroposterior radiographs <0.001 0.813
  Mean angulation (range) (°) 31.9 (16-56.8) 16.8 (2-52.5) 17.1 (7-35.3)
Oblique radiographs <0.001 0.106
  Mean angulation (range) (°) 27.2 (12.6-65.5) 17.4 (1.6-59.1) 14.5 (0.5-32.9)
Lateral radiographs <0.001 0.099
  Mean angulation (range) (°) 20.8 (6-38) 10.4 (2-22) 11.1 (2-19)
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