OBJECTIVE: To develop a method to quickly estimate the location of center of resistance (CR) in @entity717 from the tooth's image. MATERIALS AND METHODS: The maxillary cone-beam computed tomography (CBCT) scans of 18 @entity1 were used. Finite element (FE) models of the @entity235 and their surrounding tissues were built based on their CBCT scans to calculate the locations of CR. Root length, centroid of the contact surface (CCS), and centroid of projection of the contact surface (CPCS) were also obtained from the images. The CCS and CPCS locations were projected on the tooth's long axis, which were represented as percentages of the root length measured from the root's apex. RESULTS: Using the FE results as the standards, the errors of using CCS or CPCS to estimate CR were calculated. The average location of CR calculated using the FE method was 60.2% measured from the root's apex in the @entity63867 direction and 58.4% in the BL direction. The location of the CCS was 60.9%. The difference in CR was 0.7% in the @entity63867 direction and 2.5% in the BL direction. The location of CPCS was 60.2% in the @entity63867 direction and 59.1% in the BL direction, which resulted in a 0.1% and 0.8% difference with the reference CR, respectively. The average difference of CR in the @entity63867 and BL directions was small but statistically significant (P < .05). CONCLUSION: The locations of the CR of a @entity1 @entity235 in the @entity63867 and BL directions can be estimated by finding the CPCSs in those directions.

Estimating the location of the center of resistance of XXXX .

@entity1 :: ('9606', 'Species') :: ['human', 'patients'] @entity717 :: ('MESH:D009069', 'Disease') :: ['mesial-distal (MD) and buccal-lingual (BL) directions'] @entity63867 :: ('MESH:D008644', 'Disease') :: ['MD'] @entity235 :: ('9615', 'Species') :: ['canine', 'canines']
@entity235 :: (9615,Species) :: ['canines']
