Stemless anatomic TSA result ed in similar functional outcomes and complication rates to stemmed TSA with decreased operative time and lower blood loss .
BACKGROUND Stemless anatomic total shoulder arthroplasty ( TSA ) is used in the treatment of osteoarthritis of the shoulder joint and other degenerative shoulder diseases .
It has several proposed advantages over stemmed TSA including increased bone preservation , decreased operative time , and easier removal at revision .
Fatty infiltration and muscle atrophy of the rotator cuff in stemless total shoulder arthroplasty: a prospective cohort study.
BACKGROUND The influence of preoperative rotator cuff fatty infiltration ( FI ) and muscle atrophy ( MA ) on the postoperative outcome of  total shoulder arthroplasty ( TSA ) has only rarely been investigated and reported in the literature . We hypothesized that more FI and MA would be associated with a worse postoperative functional outcome . METHODS This prospect i ve cohort study included 63 patients ( 31 female and 32 male patients ; mean age , 71 years [ range , 53 - 89 years ; st and ard deviation , 7 years ] ) with primary osteoarthritis of the shoulder operated on with anatomic stemless TSA .  Preoperatively and at 3 months and 1 year after the operation , the functional outcome ( QuickDASH [ short version of Disabilities of the Arm , Shoulder and H and question naire ] score ) and range of motion ( ROM ) ( goniometer ) and strength ( dynamometer ) for abduction at the scapular plane and for external rotation were measured . The degree of preoperative FI and MA was evaluated using computed tomography scans according to the Goutallier classification and Warner classification , respectively , for the supraspinatus and infraspinatus . RESULTS We found clinical ly and statistically significant improvements in functional outcome , strength , and ROM at both 3 months and 1 year of follow-up compared with those preoperatively . The Pearson correlation coefficient ( r ) showed significant correlations between preoperative supraspinatus and infraspinatus FI and MA and preoperative and 1-year postoperative shoulder abduction and external rotation strength but not ROM . However , we found no influence of the rotator cuff FI and MA on the functional outcome after TSA . CONCLUSION We demonstrated a significant correlation between rotator cuff FI and MA and strength but not ROM of the shoulder joint
Stemless anatomic TSA result ed in similar functional outcomes and complication rates to stemmed TSA with decreased operative time and lower blood loss .
BACKGROUND Stemless anatomic total shoulder arthroplasty ( TSA ) is used in the treatment of osteoarthritis of the shoulder joint and other degenerative shoulder diseases .
It has several proposed advantages over stemmed TSA including increased bone preservation , decreased operative time , and easier removal at revision .