Humeral head implant with inlay glenoid component may lead to glenohumeral recentering

Sumary of Humeral head implant with inlay glenoid component may lead to glenohumeral recentering:

  • Use of a non-spherical humeral head implant coupled with an inlay glenoid component may lead to glenohumeral recentering in patients with eccentric glenoid wear and posterior subluxation, according to published study results..
  • Sercan Yalcin, MD, and colleagues used the Walch index and point of contact ratio method to compare ratios of preoperative and postoperative humeral head subluxation in 49 patients with primary glenohumeral osteoarthritis with a posteriorly subluxated humeral head who underwent total shoulder arthroplasty with combination non-spherical humeral head resurfacing and inlay glenoid replacement (Hemi-CAP OVO/Inlay Glenoid Total Shoulder System, Arthrosurface)..
  • Radiographic measurements were performed by two orthopedic surgeons and researchers included means of two independent measurements in the final analysis for each shoulder..
  • In these shoulders, researchers noted Walch type B1 glenoids in 3 shoulders, B2 in 22 shoulders and B3 4 shoulders..
  • Results showed a mean preoperative Walch index of approximately 56.57% and mean preoperative point of contact ratio of approximately 62.97%..
  • Researchers found a mean postoperative Walch index and point of contact ratio of approximately 49.47% and 50.08%, respectively..
  • Researchers noted both methods had significant differences between preoperative and postoperative subluxation ratios and found good-excellent inter-rater reliability..
  • According to Yalcin, posterior humeral head subluxation, bone loss and decentering of the joint affect both short- and long-term results of shoulder arthroplasty…

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