As described in Table 1, the average pre- and post-cyclic glenoid baseplate displacement in scapula with 8.5 mm and 12.5 mm anterior glenoid defects was significantly greater than that of baseplates in scapula without an anterior glenoid defect in both the AP and SI directions.
(32-36) The observed pre- and post-cyclic baseplate displacements associated with the 8.5 mm anterior glenoid defect group in this study were comparable to that of other baseplate designs available in the marketplace when used without a glenoid defect and tested using the same methodology.
strength degradation of undisturbed and remolded marine silty clay," in Proceedings of the 18th International Offshore and Polar Engineering Conference (ISOPE 2008), Vancouver, Canada, July 2008.
Banerjee, "Factors affecting post-cyclic
undrained shear strength of marine clay," Geotechnical and Geological Engineering, vol.
Table 1 presents the average pre- and post-cyclic glenoid baseplate displacement in scapulae with 10[degrees] posterior glenoid defects.
Table 2 presents the average pre- and post-cyclic glenoid baseplate displacement in scapulae with 20[degrees] posterior glenoid defects.
However, using rTSA in the scapula with posterior glenoid defects generally increased the pre- and post-cyclic baseplate displacement relative to the non-defect control, regardless of baseplate type or reaming method, with larger size defects associated with greater increases in pre- and post-cyclic displacement.
Following cyclic loading, a dial gauge quantified the post-cyclic displacement in the same method as the precyclic displacement at a rate of 100 N/sec.
The pre- and post-cyclic displacement data from each of the three cyclic loading tests are presented and compared in Tables 1, 2, and 3, respectively.
The results of this study demonstrate that both new and current cage glenoid designs maintain fixation when tested according to each of the three different cyclic loading scenarios, with no difference in post-cyclic displacement observed between designs.
The reverse shoulder glenoid loosening method consisted of two tests: a displacement test and a cyclic test and was conducted in three phases: phase 1) pre-cyclic displacement test, phase 2) cyclic test, and phase 3) post-cyclic displacement test.
The average pre- and post-cyclic displacement associated with each reverse shoulder design in the low and high density polyurethane substrates are described in Tables 2 and 3, respectively.