JOURNAL ARTICLE

Lasso plate - An original implant for fixation of type I and II Regan-Morrey coronoid fractures

P Wang, Y Zhuang, Z Li, W Wei, Y Fu, X Wei, K Zhang
Orthopaedics & Traumatology, Surgery & Research: OTSR 2017, 103 (3): 447-451
28185992

INTRODUCTION: Coronoid fractures are notoriously difficult to manage particularly when there is a small fragment. We report a retrospective analysis of our experience with consecutive type I and II Regan-Morrey coronoid fractures using a lasso plate.

HYPOTHESIS: Type I and II Regan-Morrey coronoid fractures can be effectively managed using a lasso plate.

METHODS: From October 2011 and December 2013, 25 patients (21 males and 4 females, mean age 40.0 years) with type I and II Regan-Morrey coronoid fractures were treated with the open reduction and internal fixation (ORIF) using the lasso plate. Postoperative measurements of the elbow range of motion were recorded. Elbow function was evaluated by the Mayo Elbow Performance Score (MEPS) and Disabilities of the Arm, Shoulder and Hand (DASH) score.

RESULTS: All patients were reexamined at a mean follow-up of 32.7 months (range: 24-49 months). The mean fractures healing time was 13.6 weeks (range: 6 to 18 weeks). The mean flexion range of the elbow was 121.8° (range: 90° to 135°) and the mean extension range of the elbow was 10.6° (range: 0° to 20°). The mean pronation of the forearm was 75.8° (range: 65° to 85°). The mean supination of the forearm was 80.4° (range: 70° to 90°). The mean DASH score was 10.2 (range: 0 to 28). The mean MEPS was 83.4 (range: 55 to 95), 8 patients (32%) were rated excellent, 14 patients (56%) were rated good, 2 (8%) patients were rated fair. One (4%) patient was rated poor. No patient was seriously infected but implant breakage was found in one case. Two cases of elbow heterotopic ossification (HO) were observed. Two cases of elbow medial instability were observed.

DISCUSSION: The type I and II Regan-Morrey coronoid fractures combined with the instability of the elbow should be operated. The lasso plate reduces the pressure between the wire and the insertion of capsule. A tight wire results in greater stability than ordinary suture fixation, thus enabling early functional exercise.

CONCLUSION: In the treatment of type I and II Regan-Morrey coronoid fractures, lasso plate can provide concentric fracture reduction of the elbow and stable fixation to allow for early rehabilitation. Good clinical outcomes can be anticipated.

LEVEL OF EVIDENCE: Level IV: retrospective study.

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