Computer assisted surgery of the distal humerus can employ contralateral images for pre-operative planning, registration, and surgical intervention

A Novel Registration-Based Approach for 3D Assessment of Posttraumatic Distal Humeral Deformities

“…Furthermore, registration of the elbow segment was possible even in the presence of severe bone loss at the articular surface and did not affect the flexion-extension axis of the elbow or the offset. These findings 7,16 reinforce the results of the present study. However, in the work by McDonald et al, the size of the distal humeral shaft segment used for the registration was not defined 7,16 .…”

“…e127 (6) T HE J OURNAL OF B ONE &JOINT SURGERY d JBJS. ORG VOLUME 99-A d NUMBER 23 d D ECEMBER 6,2017 McDonald et al 7 also demonstrated that anthropometric distal humeral measurements (i.e., the flexion-extension axis of the elbow and the offset) are similar for paired specimens. Registration of the elbow segment, such as that defined in the present study, to the healthy contralateral anatomy yielded a side-to-side difference of approximately 1.0°and 0.5 mm.…”

“…The current state-of-the-art method in 3D deformity assessment relies on comparison of the pathological bone with a reconstruction template representing the normal anatomy. Currently, the contralateral anatomy most commonly serves as the basis of such reconstruction templates 1,4-8 because most geometric measurements are similar between both sides of an individual [7][8][9] . A surface registration method is applied to superimpose the model of the pathological side onto the mirrored model of the contralateral side 1,3,5,10 .…”

Influence of chondrodystrophy and brachycephaly on geometry of the humerus in dogs

“…The assessment of humeral geometry based on three-dimensional (3D) reconstructions of computed tomography scans would be more precise. In human medicine, 3D models have been used to assess humeral head and glenoid retroversion and to evaluate specific aspects of total shoulder arthroplasty, including predicting humeral head size, designing a distal humeral hemiarthroplasty, and planning shoulder arthroplasty or distal humerus hemiarthroplasty (33)(34)(35)(36)(37).…”

Stem abutment affects alignment of the humeral component in computer-assisted elbow arthroplasty

“…In contrast, previous studies have demonstrated that the variation in the position and orientation of the native FE axis (the axis with which the implant is aligned) within the general population is quite significant. 8,13,26 Knowledge of the morphologic variations that most significantly affect implant positioning is critical to optimizing both implant design and alignment.…”