IADR Abstract Archives
Virtual Articulator Evaluation for Identification of Interferences in Mandibular Movements
Objectives: The aim of this study was to evaluate the accuracy and the reproducibility of the Whip-Mix Denar® Mark 330 virtual articulator [VA] in order to identify occlusal interferences [OI] in eccentric movements.
Methods: A probabilistic sample of 50 patients with class I of Angle without articular pathologies was used to evaluate the accuracy of the VA in order to identify OI in eccentric movements. The reference method (RM) was the occlusal analysis – encompassing clinical evaluation and the semi-adjustable articulator Whip-Mix 2240® mounting [CA] - by 2 calibrated experts (ICC=0.90).Study casts and bite registries used for mounting in the semi-adjustable articulator were scanned with the D700-3Shape scanner for their occlusal analysis in the VA. Data obtained from individual model mounting on the CA - the Bennett Angle and condylar inclinations - were loaded in the VA software and in order to evaluate the accuracy, the results obtained from the VA and RM were compared. For reproducibility, the results obtained from the three readings with the VA of 35 blind-coded mountings with weekly intervals were also compared. An intra-class correlation coefficient ICC was used for statistical analysis with confidence intervals at 95%- IBM-SPSS V23.
Results: Accuracy assessment showed that the VA presents moderate concordance strength for interference localization with regards to the RM on the left lateral movement [LM] nonworking side and protrusive movement [PM] right side (ICC=0.41-0.57). Concordance strength is regular on right LM working side, left LM working side and PM left side (ICC=0.42-0.50). There was a very good reproducibility (ICC=1, 95%CI=1, p=0.001) in all cases.
Conclusions: Even though reproducibility results with the VA were very good, concordance strength in accuracy was not significant, indicating that the evaluated VA is not applicable for identification of occlusal interferences in eccentric movements.
Methods: A probabilistic sample of 50 patients with class I of Angle without articular pathologies was used to evaluate the accuracy of the VA in order to identify OI in eccentric movements. The reference method (RM) was the occlusal analysis – encompassing clinical evaluation and the semi-adjustable articulator Whip-Mix 2240® mounting [CA] - by 2 calibrated experts (ICC=0.90).Study casts and bite registries used for mounting in the semi-adjustable articulator were scanned with the D700-3Shape scanner for their occlusal analysis in the VA. Data obtained from individual model mounting on the CA - the Bennett Angle and condylar inclinations - were loaded in the VA software and in order to evaluate the accuracy, the results obtained from the VA and RM were compared. For reproducibility, the results obtained from the three readings with the VA of 35 blind-coded mountings with weekly intervals were also compared. An intra-class correlation coefficient ICC was used for statistical analysis with confidence intervals at 95%- IBM-SPSS V23.
Results: Accuracy assessment showed that the VA presents moderate concordance strength for interference localization with regards to the RM on the left lateral movement [LM] nonworking side and protrusive movement [PM] right side (ICC=0.41-0.57). Concordance strength is regular on right LM working side, left LM working side and PM left side (ICC=0.42-0.50). There was a very good reproducibility (ICC=1, 95%CI=1, p=0.001) in all cases.
Conclusions: Even though reproducibility results with the VA were very good, concordance strength in accuracy was not significant, indicating that the evaluated VA is not applicable for identification of occlusal interferences in eccentric movements.
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