アブストラクト(25巻3号:神奈川歯学)

神奈川歯学

Japanese

Title : 試作平行形成器による支台歯形成とその教育効果に関する研究 -支台歯の軸面傾斜を中心として-
Subtitle : 原著
Authors : 川越善人*1,*2, 青木英夫*1, 浮谷實*2
Authors(kana) :
Organization : *1神奈川歯科大学補綴学教室第三講座, *2神奈川歯科大学補綴学教室第二講座
Journal : 神奈川歯学
Volume : 25
Number : 3
Page : 292-305
Year/Month : 1990 / 12
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「はじめに」 クラウン・ブリッジ補綴の臨床においては, 支台歯にいかによく適合した補綴物を製作するかということが重要な課題である. 今日では, 高速切削機械, 器具, 印象材, さらに鋳造技術などの著しい進歩, 改良に伴い, 精密加工による歯冠補綴物の製作が可能になってきた. これら一連の術式のうち, 支台歯形成は重要な基本操作であり, 完成した歯冠補綴物の良否を左右するばかりでなく, 予後に対しても影響を及ぼす. 近年, この支台歯形成についても, 高速切削法のシステム化に改めて検討が進められ, 効率化, 術者の経験年数の差異, 診療姿勢による影響などについて具体的な報告がされるようになってきた. そして支台歯形成時の切削に関する問題点を要約すると次の2点になる. 即ち, 咬合面と軸面の形成である. 前者は直視下で行える場合が多く, 支台歯の削除量を1mm~1.5mm程度に限定すれば術者が比較的容易にコントロールできる操作である.
Practice : 歯科学
Keywords : 平行形成器, 支台歯形成, 教育効果

English

Title : A Study on Tooth Preparation by Means of the Newly Developed Parallelometer and its Educational Effect -With Primary Regard to Convergence Angles of Abutment Tooth-
Subtitle :
Authors : Yoshito KAWAGOE*1,*2, Hideo Aoki*1, Makoto Ukiya*2
Authors(kana) :
Organization : *1Department of Crown & Bridge Prosthodontics, Kanagawa Dental College, *2Department of Complete Denture Prosthodontics, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 25
Number : 3
Page : 292-305
Year/Month : 1990 / 12
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : [Abstract]: Proper tooth preparation is one of the fundamental requirements in crown & bridge prosthodontics. However, it is difficult for students in particular to prepare adequate convergence angles of abutment tooth in the limited environment of patient's mouth. Therefore, the parallelometer was developed to improve the preparations as a supplementary device which informs the person by a signal of alarming simultaneously when a bur is not properly installed to convergence angles of abutment tooth. Sixty subjects were selected from students of Kanagawa Dental College and they were divided into two groups (A and B) to prepare abutment tooth of lower right 1st molar for full cast crown on typodont mounted into the manikin. A preliminary training was performed for once without the parallelometer for group A and with it for group B prior to a comparative experiment. The following results were obtained with primary regard to convergence angles of abutment tooth. 1. Related to each of four convergence angles, group B is superior to group A in all mean values with a statistcal significance (P<0.01). 2. Related to a total of four convergence angles by the maximum number of subjects, group B is also superior to group A in a mean value by about ten degrees. 3. A newly developed parallelometer proved to be an efficient supplementary device for training of students to master a technique of preparation for adequate abutment tooth.
Practice : Dentistry
Keywords :