NCT02966886

TSA Techniques in Glenohumeral OA

Comparison of Shoulder Arthroplasty Techniques in the Treatment of Glenohumeral Osteoarthritis: Protocol

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 216 (estimated)
• Sponsor: Ottawa Hospital Research Institute · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Osteoarthritis (OA) of the shoulder is a disease resulting from the wearing down of cartilage over time. OA can produce pain and dysfunction at the affected joint and is a growing occurrence in an aging population. Total shoulder arthroplasty (TSA) is a surgical treatment used to treat patients with shoulder OA which involves replacing the worn-out ball and socket shoulder joint with prosthetic components. TSA is performed today with high success rates, however, complication rates associated with TSA remain prevalent particularly when the arthritis is associated with bone erosion on the glenoid (socket). Given the high rate of revisions associated with TSA treatment in the setting of glenoid bone erosion, a number of surgical strategies have been developed. These surgical techniques include eccentric reaming which involves removing bone from the front of the socket, augmented glenoid component implantation, and posterior bone grafting to compensate for glenoid bone loss, and reverse shoulder arthroplasty. Few research studies have compared these different surgical techniques to one another. Previous studies have been limited to case series with small sample sizes and respective designs. This study is being conducted to determine which approach produces better outcomes. For the purpose of this study we will be comparing total shoulder arthroplasty techniques a) augmented glenoid component and eccentric reaming and b) augmented glenoid component and bone grafting in participants with advanced glenohumeral osteoarthritis.

Detailed description

Patients who have 10-15 degrees of retroversion will be randomly assigned to one of two standard of care treatment groups: TSA with eccentric glenoid reaming or TSA with augmented glenoid component implantation. Patients whose condition involves \> 15 degrees of retroversion will be randomly assigned to one of two standard of care treatment groups: TSA with augmented glenoid component implantation or posterior glenoid bone grafting. The primary objective will be measured by the Western Ontario Osteoarthritis of the Shoulder Index (WOOS) score pre-operatively and at post-operative time intervals (i.e. 3, 6, 12 and 24 months). Secondary Objectives: i) To determine the survivorship of the components as measured by the degree of radiographic lucencies and component alignment determined by a CT scan at 1 and 5 years post-surgery between study arms in both age groups. ii) To determine the difference in disease specific quality of life between treatment allocations in both age groups as measured by the Constant score, the American Shoulder and Elbow Surgeons Standardized Shoulder Assessment form (ASES) and the EuroQol Group EQ-5D-5L score pre-operatively and at post-operative time intervals (i.e. 3, 6, 12 and 24 months), as well as adverse events, and health care utilization.

Conditions

• Osteoarthritis, Shoulder

Interventions

Type	Name	Description
PROCEDURE	Eccentric Reaming	Pre-operative CT imaging and surgical planning software based on pre-operative CT scans will be used in each case to determine the degree of eccentric ("high side") anterior reaming to within \< 10 degrees of neutral glenoid version.
PROCEDURE	Augmented Glenoid Component Implantation	Patients will undergo standard glenoid preparation and implantation of a posteriorly augmented glenoid component. The degree of posterior augment will be based on pre-operative CT scan assessment and templating software with the goal of correcting glenoid retroversion to within 10 degrees of neutral version.
PROCEDURE	Posterior Glenoid Bone Grafting	Patient will undergo a total shoulder arthroplasty as per standard technique. Glenoid version will be restored to within 10 degrees of neutral with a posterior glenoid bone graft. The bone graft will be harvested from the humeral head and fixed to the posterior glenoid with mini-fragment screws.

Timeline

• Start date: 2017-04-23
• Primary completion: 2027-12-01
• Completion: 2028-12-01
• First posted: 2016-11-17
• Last updated: 2024-04-30

Locations

1 site across 1 country: Canada