アブストラクト(32巻2号:The Bulletin of Kanagawa Dental College)

The Bulletin of Kanagawa Dental College

English

Title : The Actual Situation of Damage by a Tooth Cutter to Proximal Teeth
Subtitle : ORIGINAL ARTICLES
Authors : Naoki Yamada, Hisashi Miyamoto*, Toshio Teranaka*, Minoru Toyoda**
Authors(kana) :
Organization : KDC Yokohama Clinical Training Center Clinical Dental Science Department of Comprehensive Dentistry, Division of Prosthetic Dentistry, Kanagawa Dental College, *Department of Oral Medicine division of Operative Dentistry and Endodontics, Kanagawa Dental College, **Department of Oral and Maxillofacial Rehabilitation division of Prosthetic Dentistry, Kanagawa Dental College
Journal : The Bulletin of Kanagawa Dental College
Volume : 32
Number : 2
Page : 83-88
Year/Month : 2004 / 9
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : To realize the actual situation of damage by a tooth cutter to proximal teeth while repairing proximal surfaces, an investigation was undertaken to unveil the damage to class II inlay cavities and the teeth proximal to the abutment teeth in an arbitrary selection of 87 cases of model inlays and 167 cases of crowns, immediately after removal from impression materials. The investigation revealed that cutter marks were present on most adjacent surfaces to inlays or crowns. The marks made by the cutter are mostly planar in shape, and no characteristic differences were found between regions or between the mesial and distal surfaces (P>0.05). As for the depth of cutter marks, approximately 50% of the total consisted of a single type that was present only on the surface layer. This was followed by multiple marks (about 20%) and deep marks which even penetrated beneath the surface layer (about 30%). This tendency was found in the case of both inlays and crowns. Also, as for inlays, there were significant differences; deeper damage was more evident in the mesial surfaces compared to the distal, in teeth in both upper and lower jaws (P<0.05). From the above data, it is considered that cutter damage occurs not so much due to the peculiarities of individual regions but because of the difficulty of working under conditions of poor visibility in confined spaces in the oral cavity.
Practice : Dentistry
Keywords : Tooth cutter, Cutter damage, Proximal surface