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Arthroscopic Anatomic Glenoid Reconstruction Without Subscapularis Split.

ABSTRACT: The role of bone loss from the anterior glenoid in recurrent shoulder instability has been well established. We present a completely arthroscopic technique for reconstructing the anterior glenoid with distal tibial allograft and without a subscapularis split. We perform the arthroscopy in the lateral position. We measure and size an allograft distal tibial graft and place it arthroscopically. We use an inside-out medial portal to introduce the graft into the shoulder, passing it through the rotator interval and above the subscapularis. A double-cannula system is used to pass the graft, which is temporarily fixed with K-wires and held in place with cannulated screws. We then perform a Bankart-like repair of the soft tissues to balance the shoulder and augment our repair. Our technique is not only anatomic in the re-creation of the glenoid surface but also anatomic in the preservation of the coracoid and subscapularis tendon and repair of the capsulolabral complex.

SUBMITTER: Wong IH

PROVIDER: S-EPMC4662065 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature

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Arthroscopic Anatomic Glenoid Reconstruction Without Subscapularis Split.

Wong Ivan H IH Urquhart Nathan N

Arthroscopy techniques 20150921 5

The role of bone loss from the anterior glenoid in recurrent shoulder instability has been well established. We present a completely arthroscopic technique for reconstructing the anterior glenoid with distal tibial allograft and without a subscapularis split. We perform the arthroscopy in the lateral position. We measure and size an allograft distal tibial graft and place it arthroscopically. We use an inside-out medial portal to introduce the graft into the shoulder, passing it through the rota ...[more]

PMID: 26697303

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Project description:In the presence of bone loss, the Bristow or Latarjet procedure is used to alleviate anterior glenohumeral instability. The techniques have gradually improved under arthroscopy. However, such an arthroscopic procedure has a steep learning curve, lengthy operation time, and considerable risk of complications, inhibiting its rapid development. The current method of modified arthroscopic Bristow procedure with screw fixation without subscapularis split reduces surgical time, reduces the risk of nerve damage consequences, and is simple to apply. Technique Video Video 1 We present our modified arthroscopic Bristow procedure: screw fixation without subscapularis split. The patient is placed in the beach-chair position, and 5 portals are created. After performing a diagnostic arthroscopy examination, the coracoid process lower surface, tip, and base, and the conjoined tendon are identified. The soft tissue lateral to the conjoined tendon is released to a sufficient length to allow transferring the coracoid process. The coracoacromial ligament is excised at its coracoid insertion to expose its lateral and upper surfaces. Subsequently, the pectoralis minor muscle is released from the coracoid to ∼5 cm below the junctions between the pectoralis minor muscle and the conjoined tendon to ensure the transfer of the coracoid process will not be affected. A 1.2-mm K-wire is drilled into the coracoid under the guidance of a thin cannula. A PDS line is passed through the bone tunnel for traction and guidance. After ensuring an adequate length of the coracoid bone, it is osteotomized with a willow saw. Subsequently, the labrum and capsule are detached completely from the glenoid to the 6-o’clock position. The glenoid is refreshed by a burr. The upper edge of the subscapularis is pressed downwards by a switching stick until the 4-o’clock position of the anterior glenoid is exposed. A marking point is placed to assist in creating a tunnel at the 4-o’clock position. After drilling and measuring, a 1.2-mm K-wire is inserted into the tunnel to guide the screw. The coracoid is pulled out through portal D, its length is measured, and its osteotomy surface is trimmed to match the anterior glenoid surface. A hole is drilled from the center of the osteotomy surface to the tip of the coracoid with a 1.2-mm K-wire. The hole created by the 1.2-mm K-wire is drilled through with a 2.7-mm hollow drill. A cannulated screw with a diameter of 4 mm is implanted into the coracoid graft along the 1.2-mm K-wire, leaving 2 mm of the screw head above the osteotomy surface for the coracoid's final fixation. The lateral edge of the conjoined tendon is sutured with No. 2 ETHIBOND suture near the coracoid and kept sufficiently taut to prevent twisting during coracoid fixation. The coracoid with partial screw fixation is then inserted for the final fixation. The tip of the screw is positioned against the K-wire introduced through the glenoid tunnel in the previous phase. The K-wire is threaded through the screw, and the coracoid and screw are secured with a screwdriver. The final placement of the transferred coracoid is arthroscopically assessed through portal B. The postoperative anteroposterior radiograph shows that a single screw maintains the coracoid in place. The 3-dimensional computed tomography scan depicts the locations of the graft and screw. The transferred coracoid is seen at the 4-o’clock position, and the glenoid surface is well integrated with the coracoid graft’s surface. The scan also shows that the transferred coracoid is standing on the glenoid surface with a 90° rotation. (PDS, polydioxanone.).

Dataset Information

Arthroscopic Anatomic Glenoid Reconstruction Without Subscapularis Split.

Publications

Arthroscopic Anatomic Glenoid Reconstruction Without Subscapularis Split.

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