Severe acromioclavicular joint osteoarthritis is associated with acromial stress fractures after reverse shoulder arthroplasty

Low acromial insufficiency fracture rate in reverse shoulder arthroplasty with distal clavicle excision

“…9 Townsend et al similarly did not find a direct correlation between the presence of AC joint arthritis and the likelihood of AIF. 13 However, they did show that the patients with severe AC joint arthritis (defined by spanning or fused osteophytes) had a significantly greater risk for AIF. In a subset of 50 patients, Verstraete et al revealed an association between prior AC joint surgery (debridement or DCE) and decreased risk of AIF.…”

“…However, Townsend et al recently associated severe AC joint arthritis with an increased risk for AIF after RSA. 13 This suggests that decreased motion at the AC joint may lead to greater stress on the acromion and scapular spine after RSA. Therefore, conversely, increased motion at the AC joint (such as after DCE) may also have a relationship to the incidence of AIF.…”

Influence of acromioclavicular joint arthritis on outcomes after reverse total shoulder

“…Previous studies have been conducted on evaluating the risk of acromial stress fractures with ACJ pathology. 6 , 32 , 35 Patients undergoing rTSA with osteophytes spanning the ACJ (Grade 6) may have a predisposition to acromial stress fractures, which is a rare but potentially catastrophic complication of rTSA. 32 While recent work has begun to provide some insight into the risk factors of acromial stress fractures after rTSA, the exact etiology is multifactorial and surgical considerations to prevent their occurrence remain largely unknown.…”

“… 6 , 32 , 35 Patients undergoing rTSA with osteophytes spanning the ACJ (Grade 6) may have a predisposition to acromial stress fractures, which is a rare but potentially catastrophic complication of rTSA. 32 While recent work has begun to provide some insight into the risk factors of acromial stress fractures after rTSA, the exact etiology is multifactorial and surgical considerations to prevent their occurrence remain largely unknown. 3 , 14 , 19 , 20 , 25 , 29 In the present study, we excluded patients with postoperative acromial stress fractures due to their influence on outcomes of rTSA.…”

“…Grade III shows full cartilage degeneration of more than 50% of the joint surface and inferior osteophytes >2 mm. 32 The King classification system is a modified Petersson system that takes superior osteophytes into account in the grade of ACJ DJD and more specifically defines the cutoff at each level of ACJ DJD based on size and joint space. The King classification system is broken down into 6 grades of ACJ DJD ( Fig.…”