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Reverse Total Shoulder Arthroplasty
Published on: July 5, 2011
Glenohumeral Stability During External Rotation in Patients Treated With the Latarjet Procedure: A Two-Year Dynamic
Josephine Olsen Kipp1,2,3, Emil Toft Petersen1,2,3, Maiken Stilling1,2,3
1AutoRSA Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N, Denmark.
Summary
The Latarjet procedure restores normal glenohumeral joint (GHJ) kinematics in patients with anterior shoulder instability. This surgery leads to improved shoulder function and patient outcomes within two years.
Area of Science:
- Orthopedic Surgery
- Biomechanical Analysis
- Shoulder Kinematics
Background:
- Anterior shoulder instability with glenoid bone loss often requires surgical intervention.
- The Latarjet procedure is a common treatment, but its effect on joint motion is not fully understood.
Purpose of the Study:
- To evaluate glenohumeral joint (GHJ) kinematics during active external rotation after the Latarjet procedure.
- To compare postoperative motion with the contralateral healthy shoulder and assess patient-reported outcomes.
Main Methods:
- Dynamic radiostereometry (RSA) and CT-derived 3D models were used to track GHJ motion.
- Kinematics were assessed preoperatively and at 1- and 2-year follow-ups.
- Patient outcomes were measured using the Western Ontario Shoulder Instability Index (WOSI).
Main Results:
- Preoperatively, the injured shoulder exhibited anterior and inferior humeral head positioning.
- Postoperatively, the humeral head shifted posteriorly and superiorly, with kinematics becoming comparable to the healthy shoulder by 2 years.
- Shoulder contact area increased, and WOSI scores significantly improved over the follow-up period.
Conclusions:
- The Latarjet procedure effectively normalizes GHJ kinematics during external rotation within two years.
- The surgical technique improves shoulder function and patient satisfaction in cases of anterior instability with bone loss.