Radiographic assessment of metacarpal shortening after nonoperative and operative treatment of spiral and oblique metacarpal shaft fractures
Injury · 4 Oct 2026
† Impact is the editorial-priority score. All scores are out of 100. Clinical is a stored clinical-importance score from the earlier method; it has not been recalculated.
Why it matters
Students and residents should expect a few millimetres of shortening after nonoperative care of spiral or oblique metacarpal fractures, which challenges the older teaching that shortening of 2 mm or more mandates surgery.
The evidence
This study brought back 33 patients from an earlier randomised trial of displaced spiral or oblique finger metacarpal shaft fractures, about 4.5 years after treatment, to measure how much the broken metacarpal had shortened on bilateral X-rays. Patients treated without surgery and allowed immediate free movement healed with about 3.9 mm of shortening, compared with 0.9 mm after surgical fixation, a mean difference of 3 mm (95% CI 1.6 to 4.3 mm). Extension deficit, cosmetic appearance, and satisfaction did not differ significantly, and the radiographic measurement method (SH-Abs) was reproducible.
Metacarpal shortening: Mean difference 3 (95% CI 1.6 to 4.3; SH-Abs). The interval favours the comparator; the size of the disadvantage needs clinical interpretation.
Why this rigour score?
Pre-specified secondary analysis
Methods at a glance
Recorded assessment- Confounding adjustmentNot applicable
- Covariate balance confirmedNot applicable
- Outcome assessors blindedNot met
- Comparable start of follow-upNot applicable
- Adequate statistical powerUnderpowered
- Prospective registrationMet
Not reported does not mean not done. Checks have different weights; this is not a count of boxes ticked.
How to read this assessment
The recorded methods are shown alongside the published score. A verified point-by-point calculation is not available for this version of the appraisal.
Checklist from the stored appraisal. “Not met” describes the recorded criterion; it does not always produce a deduction. This overview supports reading the full study.
For journal club
1.When counselling a patient with a displaced spiral metacarpal shaft fracture, how would you explain the expected 3 to 4 mm of shortening with immediate mobilisation, and does it change your recommendation?
2.Which patients, such as musicians or manual workers who rely on fine motor strength, might still warrant operative fixation despite similar satisfaction and extension outcomes?
Original publication title
Radiographic assessment of metacarpal shortening after nonoperative and operative treatment of spiral and oblique metacarpal shaft fractures