Clinical Outcome Comparison Between Medial and Lateral Offset Reverse Shoulder Arthroplasty

The purpose of this study is to prospectively evaluate two FDA approved implant designs for the Tornier Reverse Shoulder arthroplasty. The small difference in design is the amount of offset each implant has. This offset may improve clinical outcomes in the patient population. There have been no clinical comparative studies between these two designs in the literature to date. We would like to follow these patients for two years after implantation of the reverse shoulder and evaluate their radiographs, pain scores, and shoulder functional scores. this would be the first randomized prospective single blinded study of its kind.

Study Overview

• Status: Completed
• Conditions: Rotator Cuff Tear; Proximal Humerus Fractures; Malunions; Chronic Proximal Humerus Dislocations

Detailed Description

The combination of shoulder arthritis and rotator cuff deficiency presents quite a surgical challenge. The reverse prosthesis offers a treatment option for subset of patients as previous attempts to treat with soft tissue reconstruction or conventional arthroplasty have provided sub-optimal clinical results. Numerous reports in the literature have validated the effectiveness of the reverse design.

Patients meeting criteria must be between the ages of 50 and 95 years of age and are a candidate for a reverse shoulder arthroplasty. This is includes patients with rotator cuff tear arthroplasty, irreparable rotator cuff tears, significant proximal humerus fractures and malunions, and chronic proximal humerus dislocators. A total of 40 patients will be enrolled and randomized to either one of two groups; 20 patients will be randomized to the Tornier Reversed shoulder Arthroplasty Medial offset, and 20 will receive the Lateral offset design. Both implants are FDA approved. The patients will be followed for 24 months and will follow-up will be at 6 weeks, 3 months, 6 months, 12 months and 24 months questionnaires will be completed at each visit, x-rays will be done at pre-op, 3 month, 6 months 12 and 24 months.

• Study Type: Observational
• Enrollment (Actual): 37

Contacts and Locations

Study Locations

• United States
  • California
    • Loma Linda, California, United States, 92354
      • Loma Linda University Health Care Dept. of Orthopaedic Surgery

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 50 years to 90 years (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

Elderly/aged, Inpatient and outpatient, healthy patients, females, males physically handicapped, Seventh-day Adventist cohort.

Description

Inclusion Criteria:

1. Any patient that is a candidate for reverse shoulder arthroplasty this includes:

• rotator cuff tear arthroplasty,
• irreparable rotator cuff tear,
• significant proximal humerus fracture and malunions,
• chronic proximal humerus dislocation.

Exclusion Criteria:

1. Any patient with previous arthroplasty on affected shoulder.
2. Patient who will need additional procedures including: bone grafting of the glenoid and muscle transfer.
3. Patients who do not want to participate or participate in follow-ups.

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort
Tornier Reversed Shoulder Arthroplasty Medial Offset
Lateral offset arthroplasty

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Clinical Outcome Comparison Between Medical Lateral Offset Reverse Shoulder Arthroplasty	We would like to follow these patients for two years after implantation of the reverse shoulder and evaluate their radiographs, pain scores, and shoulder functional scores. this would be the first randomized prospective single blinded study of its kind.	36 Months

Collaborators and Investigators

• Sponsor: Loma Linda University
• Investigators: Principal Investigator: Wesley Phipatanakul, MD, Loma Linda University Health Dept. Orthopaedic Surgery

Study record dates

Study Major Dates

• Study Start: May 1, 2010
• Primary Completion (ACTUAL): September 1, 2014
• Study Completion (ACTUAL): October 1, 2014

Study Registration Dates

• First Submitted: March 11, 2010
• First Submitted That Met QC Criteria: March 12, 2010
• First Posted (ESTIMATE): March 15, 2010

Study Record Updates

• Last Update Posted (ESTIMATE): September 15, 2016
• Last Update Submitted That Met QC Criteria: September 14, 2016
• Last Verified: June 1, 2011

More Information

Terms related to this study

• Keywords: irreparable rotator cuff tears
• Additional Relevant MeSH Terms: Fractures, Bone; Wounds and Injuries; Rupture; Shoulder Injuries; Tendon Injuries; Arm Injuries; Rotator Cuff Injuries; Humeral Fractures
• Other Study ID Numbers: 59247