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总义齿中立区是指总义齿患者在行使功能中,舌向外的力量与唇、颊向内的力量相抵销,此时口内所占潜在的义齿间隙,即中立区(Neutral Zone)。1931年Fish 认为天然牙是位于一平衡区域内,每个天然牙所处位置,是所有各种力量作用其上的结果。在修复总义齿时,应使义齿符合中立区,以有助于固位,否则易使义齿脱位。近年来更多的修复专家们巳认识到中立区概念的重要性。1975年Boucher 提出以往把所有假牙排在“嵴顶上”,以便机械的达到杠杆作用,现在强调把假牙排在“中立区”他认为当牙排在中立区,可籍口面肌起限制义齿的控制作用,事实上,此中立区亦即过去被天然牙所占的区域,并非忽视杠杆作用。因此,为了恢复符合生理功能的总义齿,以达到较
Neutral denture refers to the total denture patients in the exercise function, the tongue outward force and lip, cheek inward force offset, the mouth of the potential denture gap that the neutral zone (Neutral Zone). 1931 Fish believes that natural teeth are located in a balanced area, where each natural tooth is placed and is the result of all forces acting on it. In the repair of the total denture, the denture should be made in line with the neutral zone to help retention, or easy to denture dislocation. More remediation experts in recent years have recognized the importance of the concept of a neutral zone. In 1975, Boucher proposed that in the past all dentures were arranged at the top of crest in order to achieve mechanical leveraging. Nowadays dentures are placed in the “neutral zone”. He believes that when the dentition is in the neutral zone, In fact, this neutral zone, the area occupied by natural teeth in the past, does not neglect the leverage. Therefore, in order to restore the general denture in line with physiological functions, to achieve more