The center of resistance (CR) is the point of concentrated resistance to movement.
| center of resistance | considering the tooth in its alveolus, it is that point through which a pure force would result in translation of the tooth without any rotational effect; for a given tooth the center of resistance is found at approximately one-third (0.3 to 0.5) of the distance from the alveolar crest to the apex, and its location does not change (unless root length or alveolar crest height changes) |
2個上中切牙的阻抗中心在犬齒遠心1/2處，
4個上門牙的阻抗中心後移約2mm，在犬齒與第一小臼齒之間，
6個上前牙的阻抗中心向後移約7mm，在第一小臼齒處
the maxillary center of resistance is located at the most superior and posterior part of the zygomatomaxillary suture
the center of resistance of individual teeth, it is situated at a point located 1/3 to 1/2 of the distance from the alveolar crest to the root apex
CRe of the nasomaxillary complex is located on the posterosuperior ridge ofthe pterygomaxillary fissure, registered on the median sagittal plane.
The location of the center of resistance of the maxillary central incisor was approximately 0.77 of the root length from the apex. During anterior tooth retraction with sliding mechanics, controlled crown-lingual tipping, bodily translation movement, and controlled crown-labial movement could be achieved by attaching a power-arm length that was lower, equivalent, or higher than the level of the center of resistance, respectively. The power-arm length could be the most easily modifiable clinical factor in determining the direction of anterior tooth movement during retraction with sliding mechanics.
The center of resistance of a molar without periodontal reduction is located in the bifurcation area
The Relation between the Point of Force Application and Flaring of the Anterior Segment
Determining the Center of Resistance of Maxillary Anterior Teeth Subjected to Retraction Forces in Sliding Mechanics Distal Movement of Maxillary ,,,,,,) Biomechanic Strategies(dr. nanda)
台科大機械工程系 楊宗樺 ~~碩士論文~~牙齒矯正之三維有限元素分析
Correction of a Canted Lower Incisal Plane
Finite Element Method Analysis of the Tooth Movement Induced
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