Quantitative videographic analysis of intraoperative total shoulder arthroplasty is predictive of radiographic implant loosening.

BACKGROUND

It is believed that both patient and surgeon factors contribute to premature implant loosening. This video study was designed to answer the following questions: Can orthopedic surgeons reliably differentiate between procedures done well and those that will lead to early glenoid failure? Do the difficulty of the operation and the surgeon's performance predict a patient's outcome? Does the presence of a Walch B2 glenoid result in surgery that is evidently more difficult and performed in such a way to suggest early glenoid component failure?

METHODS

Eleven upper extremity surgeons blindly graded a set of intraoperative videos of 15 total shoulder arthroplasty patients (grouped by outcome at 2 years). Evaluation questionnaires consisted of questions about the perceived difficulty and the surgeon's performance. Total and partial patient scores were calculated for each video. Higher calculated score would indicate worse postsurgical outcome.

RESULTS

The loosening group had a significantly higher total score ( = .0057). Also, patients with B2 glenoids scored significantly higher than patients with other wear type. The analysis of overall procedure performance indicated difference between outcome groups ( = .0063).

CONCLUSION

Our results indicate that surgeons could review surgical videos and differentiate the cases that were difficult or those that were more likely to lead to loosening of the glenoid component. The presence of a B2 glenoid was predictive of difficult surgery. The results of this study should serve as a starting point for surgeons interested in critically evaluating performance and also for those interested in finding ways to maximize patient outcomes after total shoulder arthroplasty.