Object:
The purpose of this study was to compare the occlusal parameters and the wear of artificial teeth between lingualized and anatomical occlusal complete dentures.
Methods
Edentulous patients who met the inclusion criteria were divided into three groups, and each patient made a complete denture. The Excellence IPN (IPN) group and Surpass G group were lingualized occlusal complete dentures, and Endura group was anatomical occlusal complete dentures. The occlusal contact area (OCA) and occlusal contact number (OCN) of the mandibular dentures was measured by silicone rubber translucency method, and the bite force was measured with Dental Prescale II at the 2-week, 3-month, and 12-month follow-up visits. The complete dentures were scanned at the 2-week and 12-month follow-up visits, and the wear of the maxillary and mandibular posterior teeth was assessed with software (Geomagic Qualify 2013; Raindrop). The data were analyzed by SPSS software.
Results
The results of One-way ANVOA showed that the OCA of the Endura group were significantly larger than the IPN and Surpass G groups at the 2-week follow-up visits, while the OCA of the IPN group were significantly larger than the Endura and Surpass G groups at the 3-month and 12-month follow-up visits (P < 0.05). The OCN of the three groups were significantly different at the 2-week, 3-month, and 12-month follow-up visits (P < 0.05). The bite force of IPN and Surpass G group were significantly lower than that of Endura group at the 2-week, 3-month, and 12-month follow-up visits (P < 0.05). The wear of IPN and Surpass G artificial teeth was significantly greater than Endura at the 12-month follow-up visits (P < 0.05)
Conclusions
The occlusal contact area increased as the complete dentures were used for longer periods of time. Compared with anatomical occlusion, lingualized occlusion was able to reduce the bite force. Wear varied among the three types of artificial teeth. (The Chinese Clinical Trial Registry (No. ChiCTR2300073420))