A flap augmentation technique for Achilles tendon repair. Postoperative strength and functional outcome.

The efficacy of tendo-Achilles rupture repair by a modified version of Lindholm's technique was studied biomechanically and functionally. The procedure involves secondary reinforcement of a conventionally reapproximated rupture site by means of a backfolded augmentation flap. The flap cross section consisted of approximately one third of the proximal stump. In 18 paired fresh anatomic Achilles tendons, flap augmentation repairs had an average strength of 217.5 N (SD = 44.7), whereas conventional repairs (two interrupted Kessler sutures) failed at an average of 153.9 N (SD = 30.2). In a series of seven augmentation flap patients evaluated clinically and by Cybex dynamometry, an excellent result (by the Percy/Conochie rating) was obtained in six, and a good result in one. Plantar flexion strength in full extension averaged 94% of that of the uninvolved leg. There were no reruptures. These data suggest that flap augmentation may be a useful adjunct to conventional suture repair.