力为咬合时牙体牙周所承受之力,此力来源于颌骨肌——主要是嚼肌和翼内肌所发出之力,但非其全力,仅为该肌所能发出的最大力(咀嚼力)之一部分。牙愈用力咬,则力愈大,在一定限程内,牙周组织无不适感觉,但用力过大,牙周组织即感不适或疼痛,所以牙周组织对于力是有耐受限度的。最大力即牙周组织所能耐受的力限度,为牙周组织健康程度的标志之一,也是  force is the force that the periodontal body bear during occlusion, this force comes from the force exerted by the muscles of the jaw muscles, mainly the muscles of the chewing muscles and the wing muscles, but not the full force, only the maximum Part of the force (masticatory force). The more force the teeth to bite, the greater the force, within a certain limit, periodontal tissue without discomfort, but the force is too large, the periodontal tissue that is not feeling or pain, so the periodontal tissue for the force is tolerance limit of. The maximum force that periodontal tissue can withstand the force limit, is one of the signs of periodontal tissue health, but also