Related Experiment Video
Updated: Apr 26, 2026
09:01
Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
Published on: January 24, 2018
12.0K
Intercuneiform Instability Following Triplanar Tarsometatarsal Arthrodesis: A Case Report
Farhad A Marzook1, Reyhan Meetheen2, Ashton R Davis3
1The University of Texas Medical Branch, John Sealy School of Medicine, Galveston, Texas.
JBJS Case Connector
|April 24, 2026
Summary
Successful first tarsometatarsal (TMT) fusion for hallux valgus did not prevent intercuneiform instability. Ligamentous insufficiency may require more than fixation alone for adequate stabilization.
Area of Science:
- Orthopedic surgery
- Foot and ankle reconstruction
- Biomechanical analysis
Background:
- Hallux valgus is a common foot deformity.
- Triplanar first tarsometatarsal (TMT) arthrodesis is a surgical option.
- Intercuneiform diastasis is a potential complication.
Purpose of the Study:
- To evaluate the outcome of triplanar first TMT arthrodesis.
- To investigate the occurrence of intercuneiform diastasis post-surgery.
- To determine the effectiveness of adjunct stabilization techniques.
Main Methods:
- A case study of a 78-year-old male with osteoarthritis and hallux valgus.
- Procedure: Triplanar first TMT arthrodesis using the Lapiplasty system.
- Postoperative assessment included radiographs and clinical evaluation of midfoot discomfort.
Main Results:
- Successful fusion of the first TMT joint was achieved.
- Progressive intercuneiform diastasis was observed on radiographs.
- Recurrence of hallux valgus deformity and midfoot discomfort occurred.
Conclusions:
- Intercuneiform instability can progress despite successful first TMT fusion.
- Adjunct intercuneiform stabilization may not be sufficient in cases of ligamentous insufficiency.
- Supplemental intercuneiform fixation or arthrodesis should be considered for severe cases.
