Biceps tenodesis: a biomechanical study of fixation methods.

T Jayamoorthy¹, John R Field, John J Costi

¹Orthopaedic Unit, Repatriation General Hospital, Flinders University of South Australia, Daws Road, Daw Park, 5041 South Australia, Australia.

|March 5, 2004

Summary

Keyhole tenodesis demonstrated superior initial fixation strength compared to interference screw fixation for biceps tendon repair in cadaveric studies. This suggests potential for earlier patient mobilization after keyhole procedures.

Area of Science:

Orthopedic Surgery
Biomedical Engineering
Sports Medicine

Background:

Biceps tendon rupture is common in middle-aged and elderly individuals, often associated with bicipital tendinitis and rotator cuff tears.
Surgical repair is considered for patients needing restored supination strength.

Purpose of the Study:

To compare the initial fixation strength of keyhole tenodesis versus interference screw fixation methods for biceps tendon repair.
To evaluate two types of interference screws: round-headed cannulated interference (RCI) screw and a bioresorbable (Sysorb) screw.

Main Methods:

Cadaveric specimens were used to test the initial fixation strength of three surgical techniques: keyhole tenodesis, RCI screw fixation, and Sysorb screw fixation.
Fixation strength was assessed, and failure modes were analyzed for each group.

Main Results:

A significant difference in fixation strength was found across the study groups (P = .034).
Keyhole tenodesis was significantly stronger than RCI screw fixation (P = .033), but not significantly different from Sysorb screw fixation (P = .129).
Interference screw fixation failures occurred via tendon slippage, while keyhole fixation failures involved tendon splitting or slippage.

Conclusions:

Keyhole tenodesis offers comparable or superior initial fixation strength to interference screw fixation for biceps tendon repair.
Keyhole tenodesis may allow for earlier postoperative mobilization compared to interference screw fixation due to its fixation characteristics.

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Biceps tenodesis: a biomechanical study of fixation methods.

Area of Science:

Background:

Purpose of the Study:

Main Methods:

Main Results:

Conclusions:

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