Semitubular blade plate for fixation in the proximal humerus.
Rigid internal fixation is frequently difficult to obtain in the proximal humerus, as osteoporotic bone and small fracture fragments may preclude firm purchase of plates and/or screws. We describe our clinical results using a semitubular plate, fashioned into a blade plate device, for fixation of four displaced fractures and three osteotomies of the proximal humerus. All patients were clinically and radiographically united by 4 months postoperatively and had a functional range of motion. The strength of this fixation was compared to that of an AO "T" plate in an oblique subcapital osteotomy model using 10 matched pairs of human humeri. No statistically significant difference could be demonstrated between the two fixation methods with regard to load to failure, yield load, energy absorbed to failure, or stiffness. As a consequence of these studies, we believe the semitubular blade plate expands the options available for challenging fixations in the proximal humerus.
Sehr
J R
JR
Department of Orthopaedic Surgery, University of California Davis Medical Center, Sacramento 95817.
Szabo
R M
RM
D000328:Adult; D000368:Aged; D001696:Biomechanical Phenomena; D001860:Bone Plates; D004867:Equipment Design; D005500:Follow-Up Studies; D005593:Fracture Fixation, Internal; D006801:Humans; D008875:Middle Aged; D011859:Radiography; D012784:Shoulder Fractures / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*