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Food impaction on three-dimensional printed models with periodontal ligament simulation
Van Mai Truong1, Yang-Jin Yi2,3, Ryan Jin Young Kim4
1Faculty of Odonto-Stomatology, School of Medicine, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam.
Objective:
This study aims to evaluate food impaction on three-dimensional (3D) printed models with periodontal ligament simulation.
Materials And Methods:
Based on a commercial typodont pair, 3D maxillary and mandibular models were created with no teeth and with tooth sockets that were 1 mm wider than the original ones from 24 to 27 or 34 to 37 for periodontal ligament simulation with vinyl polysiloxane impression material. In total, 35 pairs of 7 combinations, including maxillary/mandibular typodonts in occlusion with maxillary/mandibular 3D models with/without a distal gap of canines on 3D models (tooth 23 or 33) were mounted on hinge articulators and divided into seven groups (n = 5). Each sample experienced the same manual chewing simulation on a customized device. The proximal surfaces were photographed to measure the percentage of food impaction area using ImageJ software.
Results:
Group with fixed maxillary and mandibular teeth showed more food impaction than other groups with significant differences in the average of maxilla and the average of all proximal areas.
Conclusion:
The flexibility of the periodontal ligament and the degree of freedom of the teeth in their sockets may contribute to the extent of food impaction in proximal spaces.
