Eneko Solaberrieta1, Jose Ramon Otegi2, Nestor Goicoechea2, Aritza Brizuela3, Guillermo Pradies4. 1. Researcher, Department of Graphic Design and Engineering Projects, University of the Basque Country UPV/EHU, Bilboa, Spain. Electronic address: eneko.solaberrieta@ehu.eus. 2. Researcher, Department of Graphic Design and Engineering Projects, University of the Basque Country UPV/EHU, Bilboa, Spain. 3. Professor and Associate Dean, Department of Prosthodontics and Occlusion, Faculty of Odontology, University of the Basque Country UPV/EHU, Bilboa, Spain. 4. Professor and Associate Dean, Department of Buccofacial Prostheses, Faculty of Odontology, University Complutense of Madrid, Madrid, Spain.
Abstract
STATEMENT OF PROBLEM: Conventional methods associated with many processes in dentistry are being replaced by methods that use digital technology. One of these processes is the making of occlusal records for the positioning of casts in a virtual articulator. Conventional interocclusal records and the articulator are being replaced by the virtual occlusal record and the virtual articulator. PURPOSE: The purpose of this study was to validate a virtual procedure to locate the mandibular cast in a 3-dimensional (3D) spatial position and to verify the occlusal contact points in reference to the corresponding maxillary cast on a virtual articulator. MATERIAL AND METHODS: The conventional procedure was carried out by locating 6 sets of casts in maximal intercuspal position without any interocclusal record. Then, the occlusal contacts were determined with articulating paper. Subsequently, the occlusal relationships and stone cast were digitized with a 3D scanner. The occlusal contacts were compared with photographs and by superimposing these on screenshots of the software. Finally, the deviation of discrete points on the mandibular cast was calculated, and all the points of the occlusal surface were compared point by point. RESULTS: This study analyzed the main variables of the virtual occlusal record by using 3 current reverse engineering software packages. The results show a mean deviation of 0.069 mm from the virtual occlusion procedure and a mean standard deviation of 0.011 mm from all the points of the occlusal surface. CONCLUSIONS: The main conclusion of this study was that the accuracy provided by a virtual occlusion procedure is greater than that of the traditional physical interocclusal record. Additionally, knowing the deviation of each alignment (best-fit operation or algorithm) is useful.
STATEMENT OF PROBLEM: Conventional methods associated with many processes in dentistry are being replaced by methods that use digital technology. One of these processes is the making of occlusal records for the positioning of casts in a virtual articulator. Conventional interocclusal records and the articulator are being replaced by the virtual occlusal record and the virtual articulator. PURPOSE: The purpose of this study was to validate a virtual procedure to locate the mandibular cast in a 3-dimensional (3D) spatial position and to verify the occlusal contact points in reference to the corresponding maxillary cast on a virtual articulator. MATERIAL AND METHODS: The conventional procedure was carried out by locating 6 sets of casts in maximal intercuspal position without any interocclusal record. Then, the occlusal contacts were determined with articulating paper. Subsequently, the occlusal relationships and stone cast were digitized with a 3D scanner. The occlusal contacts were compared with photographs and by superimposing these on screenshots of the software. Finally, the deviation of discrete points on the mandibular cast was calculated, and all the points of the occlusal surface were compared point by point. RESULTS: This study analyzed the main variables of the virtual occlusal record by using 3 current reverse engineering software packages. The results show a mean deviation of 0.069 mm from the virtual occlusion procedure and a mean standard deviation of 0.011 mm from all the points of the occlusal surface. CONCLUSIONS: The main conclusion of this study was that the accuracy provided by a virtual occlusion procedure is greater than that of the traditional physical interocclusal record. Additionally, knowing the deviation of each alignment (best-fit operation or algorithm) is useful.
Authors: Jaime Orejas-Perez; Beatriz Gimenez-Gonzalez; Ignacio Ortiz-Collado; Israel J Thuissard; Andrea Santamaria-Laorden Journal: Int J Environ Res Public Health Date: 2022-04-03 Impact factor: 3.390
Authors: Jacob Sigvardsson; Samuel Nilsson; Maria Ransjö; Anna Westerlund Journal: Int J Environ Res Public Health Date: 2021-05-16 Impact factor: 3.390