診療姿勢が全部鋳造冠支台形態へ及ぼす影響について : Home Position
スポンサーリンク
概要
- 論文の詳細を見る
The introduction of air-turbines has resulted in improved dental treatment and, consequently, the sitting dentistry has been designed and recommended in view of work simplification and the dentists' health. Studies and observations, however, are rare as to the influenceof dentists' sitting positions on the external prepared abutment in crown and bridge procedures. The present paper was intended to evaluate the influence of the dentists' sitting positions on the abutment preparation of full cast crowns and then the author classified the sitting positions into two categories as follow : 1. Home Position (abbreviated as H.P.) This dental treatment system arranges the dentist in a sitting position and the patient in a supine position and all the basic postures of a dentist is regulated exactly. 2. Random Position (abbreviated as R.P.) This position allows the various sitting positions up to the maximum range and most dentists usually practisein this posture. The author here studied the tendency of the upper left first molar prepared at H.P, of five dentists with clinical experiences of one to four years. 1) At occlusal surface, distobuccal and mesiolingual cusps were reduced deeper than the direction (1.3mm) of occlusal preparation, on the contrary the central pithad less reduction. 2) In four axial walls, particularly in the buccal and lingual grooves were reduced much shallower than the direction (0.6mm) in axial walls and the errorsin depth were from half to one third of the direction. 3) In spite of the direction for the subgingival reduction (1.0mm), almost all the points were less than 1.0mm in depth. And clear outlines of the lingual margin became scarecely observable. 4) The convergence angles of each axial wall were larger than 3°, that indicated the cutting instrument's angle. And the lingual and distal walls on any abutment showed more inclination (15〜20°). 5) In view of the regular depths of preparation, abutment preparation at H.P. attained its object except the convergence angles. 6) The increase of the number of the abutment preparations did not indicate morphological difference. While the total time to finish preparations decreased, the time to confirm the preparation tended to increase. 7) H.P. system, therefore, should be given more credits and popularity as one of the efficient methods to assure constant tooth preparation.
- 日本補綴歯科学会の論文
- 1983-04-01
著者
関連論文
- 1-10 マルチストロボ装置を応用した下顎運動の研究 第1報 : マルチストロボ装置について
- チューイン法による関節窩形態の変化に関する研究 (第3報)
- マルチストロボ装置を応用した下顎運動の研究 : 第1報 マルチストロボ装置について
- 下顎模型付着時の三次元的位置差に関する研究 : 第1報 計測装置と計測方法
- 歯科ろう着に関する研究 : 第1報 埋没材の種類による影響
- 診療姿勢が全部鋳造冠支台形態へ及ぼす影響について : Home Position
- 機械的人工臼歯の食品破砕効果および咬合接触に関する研究 (第1報)