Injury - 2026-09-09 - Journal Article
Robot-assisted fracture reduction and treatment outcomes in type III and IV fragility fractures of the pelvis: A retrospective cohort study.
Xiao H, Zhao C, Cao Q, Sun Q, Ma Y, Jian Y, Ming Y, Wang Y, Zhu G, Wu X
Topics
Key Takeaway
Robot-assisted fracture reduction achieved better Matta reduction quality than manual closed reduction with navigation (adjusted OR 0.139 for worse grade, p=0.001) and a 2-point higher Parker Mobility Score at 1 year in FFP type III/IV patients.
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Summary
This study compared robot-assisted fracture reduction (RAFR) versus manual closed reduction with navigation-assisted fixation for FFP type III/IV in patients ≥60 years, also examining operative versus non-operative outcomes. RAFR produced superior Matta reduction grades (adjusted OR 0.139 for worse outcome, p=0.001) and a 2.03-point higher Parker Mobility Score at 1 year (p<0.001), though Barthel Index, EQ-5D-5L, and NRS differences were non-significant. Operative treatment trended toward lower 1-year mortality (8.6% vs 21.1%, p=0.078) and better functional outcomes versus non-operative management, but overall survival did not differ significantly.
Key Limitation
The non-operative group likely contained patients deemed too frail or medically unstable for surgery, making the operative-versus-non-operative mortality comparison (p=0.078, non-significant) uninterpretable due to indication bias.
Original Abstract
INTRODUCTION
This study compared robot-assisted fracture reduction (RAFR) with manual closed reduction followed by navigation-assisted fixation in surgically treated patients with fragility fractures of the pelvis (FFP) type III or IV. Outcomes after operative versus initial non-operative management were also examined.
PATIENTS AND METHODS
This retrospective cohort study included 115 patients aged ≥ 60 years treated between March 2021 and June 2025: 39 underwent RAFR, 34 manual closed reduction with navigation-assisted fixation, and 42 initial non-operative treatment. The primary outcome was postoperative reduction quality according to the Matta criteria. Secondary outcomes included 1-year functional scores, mortality, and surgery-related complications.
RESULTS
RAFR was associated with lower odds of a worse postoperative Matta grade than manual closed reduction with navigation-assisted fixation (adjusted common OR=0.139, 95% CI 0.039-0.440; P = 0.001). Among 58 operated survivors with complete 1-year assessments, RAFR was associated with a higher Parker Mobility Score (β=2.030, 95% CI 1.093-2.966; P < 0.001), whereas adjusted differences in Barthel Index, EQ-5D-5L, and NRS were not statistically significant. In the operative versus initial non-operative comparison, 6-month mortality was 4.3% versus 15.8% (P = 0.064) and 1-year mortality was 8.6% versus 21.1% (P = 0.078), with no significant difference in overall survival (P = 0.536). Operative treatment was associated with better 1-year functional and pain outcomes after adjustment.
CONCLUSION
RAFR was associated with better postoperative reduction quality and a higher 1-year Parker Mobility Score than manual reduction/navigation, whereas adjusted differences in Barthel Index, EQ-5D-5L, and NRS were not statistically significant. Operative treatment was associated with better 1-year functional and pain outcomes in exploratory analyses, but a survival advantage was not demonstrated.