The purpose of this study is to evaluate preoperative objective measurements and operative objective measurements to determine if there is any effect to postoperative outcomes. Patients who were 18 years old or greater at the time of surgery were followed clinically and radiographically to determine best practice and optimal treatment and technique, risk and rate of complication, and postoperative outcomes.

Inclusion Criteria:

1. English speaking
2. >18 years of age
3. Underwent posterior approach to total shoulder arthroplasty by Dr. Michael Greiwe at St. Elizabeth Healthcare

Exclusion Criteria:

1. Non-English speaking
2. <18 years of age
3. Loose bone in the anterior recess of the shoulder
4. Severe arthritis with significant bony deformity

All eligible patients of the principal investigator receiving the posterior approach to total shoulder arthroplasty for any indication at our institution between September 1, 2016 and October 31, 2017 were evaluated and included in the data analysis.