Summary

We developed a flexible drill device that makes arthroscopic transosseous repair possible.

Abstract

Purpose

We developed a flexible drill device that makes arthroscopic transosseous repair possible. After confirmation of safety and utility through experiments with porcine scapula, we performed a clinical trial on selected patients.

Methods

The device is composed of a flexible drill unit and a guide pipe unit. The flexible drill unit is made of flexible multifilament wires that are twisted into a cord ensuring flexibility in any direction. A drill bit is attached onto one end of the flexible wire. The guide pipe unit is a metal pipe with one end bent at a 15o. Twelve patients with post-traumatic anterior inferior glenohumeral instability were selected. Surgical technique: The flexible drill device is inserted into the shoulder joint through the posterior portal and the guide pipe unit is placed 5 mm posterior to the margin of the anterior glenoid rim. The flexible drill is driven through the glenoid with the power drill, creating a hole in the glenoid. A non-absorbable suture is passed through the hole and a sliding knot tying is performed over the capsule and labrum after completing stitches with the suture hook loaded. The same procedures are repeated in the 2, 3 and 4 o’clock positions of the glenoid.

Results

There was no recurrence of dislocation at the mean follow-up period of 52.3 months. The mean Rowe score was 89.5 (range, 85~95).

Conclusion

Arthroscopic recreation of anatomic foot print in open Bankart repair was possible using our new flexible drill device.