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Volume 24 , Issue 3
May/June 2011

Pages 241243

Development of a Self-Adjusting Magnetic Attachment for Implant Overdentures

Yoshinobu Maeda, DDS, PhD/Tsung-Chieh Yang, DDS, PhD/Yoshiko Kinoshita, DDS

PMID: 21519571

This study aimed to clarify the efficacy of a newly developed self-adjusting magnetic attachment (SMAT) that allowed 0.4 mm of vertical and 8 degrees of rotational movements using an in vitro model. Comparison between the SMAT and a conventional magnetic attachment (CMAT) was performed for the retentive force under different dislodgement directions. Lateral forces to the abutment were also compared among the SMAT, CMAT, dome-shaped magnetic attachment, and a ball attachment. The SMAT maintained retentive force more effectively than the CMAT, even in oblique directions of dislodgement. A smaller lateral force to the abutment was found for the SMAT compared to the CMAT or ball attachment. Int J Prosthodont 2011;24:241243.

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