Related Experiment Videos
Flexor tendon-pulley interaction after tendon repair. A biomechanical study
J H Coert1, S Uchiyama, P C Amadio
1Department of Orthopedics, Mayo Clinic, Rochester, Minnesota, USA.
Journal of Hand Surgery (Edinburgh, Scotland)
|October 1, 1995
Summary
Flexor tendon repair significantly increases gliding resistance and friction within the A2 pulley. This finding highlights potential challenges in restoring natural finger movement after surgical intervention for flexor tendon injuries.
Area of Science:
- Orthopedic Surgery
- Biomechanics
- Hand Surgery
Background:
- Flexor tendon injuries are common in the hand.
- Restoring smooth tendon gliding through pulleys is crucial for functional recovery.
- The A2 pulley is critical for flexor tendon function.
Purpose of the Study:
- To quantify the impact of flexor digitorum profundus (FDP) tendon repair on gliding resistance at the A2 pulley.
- To assess changes in friction coefficient post-tendon repair.
Main Methods:
- Ten normal human ring fingers were used.
- Gliding resistance was measured for intact FDP tendons.
- FDP tendons were repaired using a 4/0 Ticron core suture and a 6/0 nylon epitendinous suture.
- Gliding resistance and friction were measured after repair.
Main Results:
- Tendon repair significantly altered the gliding pattern through the A2 pulley.
- Gliding resistance approximately doubled after surgical repair (P < 0.005).
- The friction coefficient also approximately doubled post-repair (P < 0.005).
Conclusions:
- Flexor tendon repair substantially increases gliding resistance and friction at the A2 pulley.
- Increased resistance may impede full functional recovery after FDP tendon repair.
- Further research may explore methods to mitigate this increased friction.