Chair: Shogo Ozawa (Aichi Gakuin University)

　　　

#8

Whether or not to Apply Occlusal Pressure in Fixation of Magnet Assembly

to Denture?  - Evaluation using Delphi Technique -

K. Nagao¹, T. Goto1, Y. Ishida¹, T. Ichikawa¹, M. Hideshima², H. Koshino²，K. Hoshiai²

and Y. Umekawa²

¹Department of Oral & Maxillofacial Prosthodontics, Institute of Health Biosciences,

The University of Tokushima Graduate School

²Dental Care Council, the Japanese Society of Magnetic Applications in Dentistry

Abstract

It is important to distribute the occlusal force to mucosa and abutment efficiently in magnet-retained overdentures.  The difference of tissue displacement between the tooth and mucosa is the most common precipitating factor of the overstressing of the abutment tooth.  However there are few articles related to this subject; how to fix the magnetic assembly to denture base in magnet retained overdentures. 

The purpose of this study was to build the consensus: whether or not apply occlusal pressure in the fixation of magnetic assembly to denture base using Delphi technique in the reference to the expert’s opinions. 

Dental Care Council, the Japanese Society of Magnetic Applications in Dentistry picked 71 prosthodontists who were familiar with magnetic attachments as the experts, and asked them questionnaires using Delphi technique. 

The answers were obtained from 38 experts.  The evaluation using Delphi technique suggested that it is harmful to the health of periodontal tissue of abutment teeth when the magnet assembly is fixed to denture by no occlusal pressure.