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Computer-assisted preoperative planning: the future is now! Commentary on an article by Joseph P. Iannotti, MD, PhD, et al.: "three-dimensional imaging and templating improve glenoid implant positioning".

Iannotti et al. present a very interesting and useful investigation into the use of three-dimensional preoperative imaging and templating to assist in planning the positioning of the glenoid component during anatomic shoulder arthroplasty. Additionally, any possible benefit of patient-specific instrumentation was evaluated. To my knowledge, this is the first investigation into the clinical efficacy of this particular emerging technology. All too often, new technological innovations are rapidly adopted without any proven efficacy. This study provides evidence of the role of three-dimensional imaging and templating in the surgical treatment of patients with primary osteoarthritis. This article provides a glimpse into the near future of anatomic shoulder arthroplasty.

The Materials and Methods portion of this article was appropriate to achieve the goals of the study. The study consisted of a prospective, randomized controlled trial involving a comparison of patients undergoing three-dimensional imaging and templating with patients undergoing the same imaging and templating technique with the addition of patient-specific instrumentation to assist in glenoid component positioning; a third cohort of patients who had undergone conventional two-dimensional templating was used to serve as a historical control. The retrospective latter …