| Comparison between Chronic Ulnar and Radial Collateral Ligament Repairs in the Metacarpophalangeal Joint of the Thumb |
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Sanglim Lee1, Jiyun Ha1, Ji Yeong Kim2, Suk Ha Jeon3 |
1Department of Orthopedic Surgery, Inje University Sanggye Paik Hospital, Seoul, Korea.
2Gunganhan Orthopedic Surgery Clinic, Seoul, Korea.
3Department of Orthopedic Surgery, National Medical Center, Seoul, Korea. lotusjeon@gmail.com |
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Received: 7 September 2018 • Revised: 10 October 2018 • Accepted: 25 October 2018 |
| Abstract |
Purpose
Favorable results have been reported after the direct repair of chronic ulnar collateral ligament ruptures of the thumb metacarpophalangeal (MP) joint, but the results for radial ligament seem rather controversial. The purpose of this study is to compare the results of ligament reattachment between chronic rupture of the ulnar and the radial collateral ligament (RCL) of the joint.
Methods
We reviewed retrospectively the radiologic and clinical results of ligament reattachment with suture anchors for chronic (more than 6 weeks) rupture of the collateral ligament of the thumb MP joint with averaged 22-month follow-up. The data between 6 radial and 8 ulnar ligament repairs were compared statistically.
Results
The average of postoperative ulnar deviation angle was 13.3° in radial ligament and 2.0° in ulnar ligament (p=0.020) in the last follow-up plain X-ray. Postoperative ligament instability was positive in 4 out of the 6 radial repairs and no case with instability was observed in ulnar ligament. In postoperative follow-up, sustained joint subluxation was observed only in 2 out of the 6 radial repairs.
Conclusion
The delayed repair of the RCL of the thumb MP joint resulted in less favorable outcomes and ligament instability was observed postoperatively in more than half of the cases. |
| Key Words:
Thumb, Metacarpophalangeal joint, Collateral ligament, Suture anchors |
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