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Results and DiscussionThe resurfacing alignment guides were firmly secured on the femoral head; they were stableand their auxiliary guide wire placement features were allowed for visual assessments of thealignment. The planned and the measured valgus angles were in agreement and the versionalignment neutral to femoral neck axis was within the acceptable range.Current manual alignment guides require user experience for locating the entry point andtrajectory for femoral head resurfacing. The CT based patient matched alignment guide offersa precise and reliable implant positioning, reducing the possibility of notching of the femoralneck and leaving any air pocket around the distal periphery of the implant which could lead toneck fracture or implant loosening, respectively.Figure 1. Femoral alignment guideFigure 2. 3-D planned valgus anglesThis study demonstrates the effectiveness of a guide made based on the patient specific CTscan assisting the operator in the precise alignment of the femoral implant. The potentialbenefits of this technology are consistent and accurate alignment of the implant, reduced ORtime and ease of use with reduced instrumentation.References1. Romanowski, J. et al. The Journal of Bone & Joint Surgery 90, 2008, Suppl 65-702. Davis, E.T. et al. The Journal of Bone & Joint Surgery 90-B, 2008FiguresSaturday, October 9, 2010, 15:00-15:30Session B21: Innovation in Hip Arthroplastyfile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]