Effect of a Chondral-Labral Defect on Glenoid Concavity and Glenohumeral Stability. A Cadaveric Model* by MARK D. LAZARUS, JOHN A. SIDLES, DOUGLAS T. HARRYMAN,

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Presentation transcript:

Effect of a Chondral-Labral Defect on Glenoid Concavity and Glenohumeral Stability. A Cadaveric Model* by MARK D. LAZARUS, JOHN A. SIDLES, DOUGLAS T. HARRYMAN, and FREDERICK A. MATSEN J Bone Joint Surg Am Volume 78(1): January 1, 1996 ©1996 by The Journal of Bone and Joint Surgery, Inc.

Photograph of the potted scapula attached to a six-degrees-of-freedom force-transducer, with the face of the glenoid oriented parallel to the floor. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Illustration demonstrating the measurement of glenoid concavity and the plot of the path of the center of the humeral head as it translates across the glenoid. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Photograph (Fig. 3-A) and illustrations (Figs. 3-B and 3-C) of the chondral-labral defect, created from anterior (90 degrees) to inferior (180 degrees), to the depth of the subchondral bone and medially to the center of the glenoid. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Photograph (Fig. 3-A) and illustrations (Figs. 3-B and 3-C) of the chondral-labral defect, created from anterior (90 degrees) to inferior (180 degrees), to the depth of the subchondral bone and medially to the center of the glenoid. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Photograph (Fig. 3-A) and illustrations (Figs. 3-B and 3-C) of the chondral-labral defect, created from anterior (90 degrees) to inferior (180 degrees), to the depth of the subchondral bone and medially to the center of the glenoid. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Photograph (Fig. 4-A) and illustrations (Figs. 4-B and 4-C) of the simulated operative reconstruction of the glenoid concavity with use of an autogenous biceps-tendon graft. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Photograph (Fig. 4-A) and illustrations (Figs. 4-B and 4-C) of the simulated operative reconstruction of the glenoid concavity with use of an autogenous biceps-tendon graft. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Photograph (Fig. 4-A) and illustrations (Figs. 4-B and 4-C) of the simulated operative reconstruction of the glenoid concavity with use of an autogenous biceps-tendon graft. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Lateral humeral displacement curves for one shoulder, for translation in the anteroinferior (135- degree) and posterosuperior (315-degree) directions for the three conditions. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Lateral humeral displacement curves for the three conditions in all five shoulders in the anteroinferior (135-degree) direction. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Illustration showing the mean stability ratios (and standard deviations) in the eight directions of testing. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

The stability ratio as a function of the maximum lateral humeral displacement for all three conditions in the anterior (90-degree), anteroinferior (135-degree), and inferior (180-degree) directions. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.

Graph of the translatory force plotted against the translation until dislocation for one shoulder. MARK D. LAZARUS et al. J Bone Joint Surg Am 1996;78: ©1996 by The Journal of Bone and Joint Surgery, Inc.