Dental Technology Center, Dalian Stomatological Hospital, Dalian, 116021, China.
Comprehensive & Emergency Treatment Clinic, Dalian Stomatological Hospital, Dalian, 116021, China.
BMC Oral Health. 2024 Nov 19;24(1):1405. doi: 10.1186/s12903-024-05144-2.
This study aimed to assess the occlusal contact area (OCA), occlusal contact number (OCN), bite force, and artificial tooth wear in complete dentures with lingualized and bilateral balanced occlusion.
Edentulous participants who fulfilled the inclusion criteria were divided into the three groups as follows: group I, dentures with lingualized occlusion using interpenetrating polymer network artificial teeth; group II, dentures with lingualized occlusion using double cross-linked artificial teeth; and group III, dentures with bilateral balanced occlusion using anatomical micro-hybrid resin teeth. The silicone techniques were used to assess the OCA and OCN of the mandibular dentures and the Dental Prescale II was used to evaluate the bite force at the 2-week, 3-month, and 12-month follow-up visits. Occlusal contact analyzer software was used to assess the maxillary and mandibular posterior tooth wear at the 12-month follow-up visit. All data was analyzed using the SPSS software.
The OCA of group III was significantly higher than that of groups I and II at the 2-week follow-up visit, whereas group I was considerably higher than groups II and III at the 3-month and 12-month follow-up visits. The OCN of the three groups exhibited significant differences at all three follow-up visits. Groups I and II had significantly lower bite force than Group III at the three follow-up visits. At the 12-month follow-up visit, groups I and II had significantly higher wear than Group III.
As the duration of use increases, the occlusal contact area of complete dentures increases, regardless of the occlusal schemes. The bite force of lingualized occlusion is typically lower than that of bilateral balanced occlusion. The wear locations of artificial teeth differ between the two types of occlusal schemes. (Retrospectively registered: The Chinese Clinical Trial Registry, No. ChiCTR2300073420(11/07/2023)).
本研究旨在评估具有 Lingualized 和双侧平衡咬合的全口义齿的咬合接触面积（OCA）、咬合接触数（OCN）、咬合力和人工牙磨损。
符合纳入标准的无牙颌参与者分为三组：I 组，使用互穿聚合物网络人工牙的 Lingualized 咬合义齿；II 组，使用双交联人工牙的 Lingualized 咬合义齿；III 组，使用解剖微混合树脂牙的双侧平衡咬合义齿。使用硅橡胶技术评估下颌义齿的 OCA 和 OCN，使用 Dental Prescale II 在 2 周、3 个月和 12 个月随访时评估咬合力。在 12 个月随访时使用咬合接触分析仪软件评估上颌和下颌后牙的磨损。所有数据均使用 SPSS 软件进行分析。
在 2 周随访时，III 组的 OCA 明显高于 I 组和 II 组，而在 3 个月和 12 个月随访时，I 组明显高于 II 组和 III 组。三组的 OCN 在所有三个随访时间点均有显著差异。在三个随访时间点，I 组和 II 组的咬合力均明显低于 III 组。在 12 个月随访时，I 组和 II 组的磨损明显高于 III 组。
随着使用时间的延长，全口义齿的咬合接触面积会增加，而与咬合方案无关。Lingualized 咬合的咬合力通常低于双侧平衡咬合。两种咬合方案的人工牙磨损位置不同。（回顾性注册：中国临床试验注册中心，注册号 ChiCTR2300073420（2023 年 11 月 7 日））。
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