Dr. Chalmers research is presented in Geneva, Switzerland
Glenohumeral cerclage for salvage of recalcitrant instability after reverse total shoulder arthroplasty
Reverse total shoulder arthroplasty (rTSA) reliably reduces pain and improves function in patients with rotator cuff arthropathy, failed shoulder arthroplasty, proximal humeral fractures, and irreparable rotator cuff tears.4 Nevertheless, postoperative complications are common, and reported rates range between 7% and 21%, with instability being among the most common.7,11 Instability rates after rTSA have ranged between 0% and 16% with risk factors including male sex, high body mass index, rTSA as revision for a prior failed arthroplasty, failure to adequately tension the soft tissues, and component impingement.
Superior Baseplate Inclination Is Associated With Instability After Reverse Total Shoulder Arthroplasty
Instability is the most common complication after reverse total shoulder arthroplasty (rTSA). In the native glenohumeral joint, in addition to full dislocations, more subtle forms of instability exist. However, the incidence of more subtle forms of instability, the factors associated with instability, and the effect of instability on validated outcome scores after rTSA remain poorly understood.
The objectives of this study were to determine whether glenoid inclination (1) could be measured accurately on magnetic resonance imaging (MRI) using computed tomography (CT) as a gold standard, (2) could be measured reliably on MRI, and (3) whether it differed between patients with rotator cuff tears and age-matched controls without evidence of rotator cuff tears or glenohumeral osteoarthritis.
Propionibacterium acnes (P. acnes) is the most common bacteria associated with infection after shoulder arthroplasty. These bacteria can be grown on culture of skin after standard preoperative skin preparation and antibiotics. The purpose of this study was to determine whether adding preoperative intravenous doxycycline reduces the prevalence of positive P. acnes cultures of skin and deep tissues at the time of prosthetic joint implantation during shoulder arthroplasty.
This study describes the short-term functional and radiographic outcomes after total shoulder arthroplasty (TSA) in shoulders with a B2 glenoid deformity addressed with corrective reaming.
Do magnetic resonance imaging and computed tomography provide equivalent measures of rotator cuff muscle size in glenohumeral osteoarthritis?
Rotator cuff muscle volume is associated with outcomes after cuff repair and total shoulder arthroplasty. Muscle area on select magnetic resonance imaging (MRI) slices has been shown to be a surrogate for muscle volume. The purpose of this study was to determine whether computed tomography (CT) provides an equivalent measurement of cuff muscle area to a previously validated MRI measurement.
Does prosthetic humeral articular surface positioning associate with outcome after total shoulder arthroplasty?
The purpose of this study was to determine the effect of humeral articular component positioning on changes in patient-reported outcomes after anatomic total shoulder arthroplasty.
The purpose of this study was to simultaneously examine costs, functional outcomes, and tendon healing after arthroscopic rotator cuff repair.