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Volume 24 , Issue 2
March/April 2011

Pages 127129

Retentive Characteristics of Overdenture Attachments During Repeated Dislodging and Cyclic Loading

Kwok-Hung Chung, DDS,PhD/Dean Whiting, BS/Mats Kronstrom DDS, PhD/Daniel Chan, DMD, MS, DDS/John Wataha, DMD, PhD

PMID: 21479277

The retentive and morphologic changes of overdenture attachments were evaluated independently after repeated insertion and sinusoidal loading on implant abutments. Stud and magnetic attachments were embedded in overdenture housings (n = 5). The overdentures were subjected to either repeated insertion and removal for 5,400 cycles or sinusoidal cyclic loading for 100,000 cycles. A 67.8% decrease in retentive force was observed after 100,000 loading cycles (P < .05), and a 73.9% decrease of retentive force occurred after 5,400 insertion-removal cycles (P < .05). Stud attachments showed more loss of retention and physical deterioration than magnetic attachments tested under identical conditions. Int J Prosthodont 2011;24:127129.

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