Statement of problem

Space creation for a metal retainer of the resin-bonded fixed partial dental prostheses (RBFPDPs) with the Dahl concept remains controversial because of the lack of clinical studies.

Purpose

The purpose of this clinical study was to investigate the occlusal force and occlusal contact reestablishment of RBFPDPs cemented at an increased occlusal vertical dimension (the Dahl concept) and to evaluate the factors affecting them.

Material and methods

A prospective clinical study was carried out on 28 participants receiving cantilevered RBFPDPs at an increased occlusal vertical dimension at the Faculty of Dentistry, University Teknologi MARA. Maximum occlusal forces were recorded at precementation, postcementation, and 12-week review visit by using pressure indicating film, while occlusal contact reestablishment was assessed at the precementation stage and 12-week review visit by using shim stock foils. The Wilcoxon signed-rank and chi-squared tests were used for statistical analysis (α=.05).

Results

Significant differences were found for maximum occlusal force between the precementation and the postcementation and between the postcementation and the 12-week review of RBFPDPs (P<.05 for both) in all 28 participants. However, no significant difference was found between the precementation and the 12-week review (P=.085). The occlusal force reestablishment concerning sex, age, location, and arch of the prosthesis was found to be similar. Most of the participants (89.3%) achieved complete occlusal contact reestablishment and 10.7% partial occlusal reestablishment. The demographic and prosthesis factors were not significantly related to the occlusal reestablishment (P>.05).

Conclusions

Overall, occlusal force was reestablished after 12 weeks, and occlusal contact was completely reestablished in most participants after placement of RBFPDPs at an increased occlusal vertical dimension.

中文翻译：

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使用 Dahl 概念使用树脂粘合固定部分义齿重建咬合力和咬合接触：一项临床研究

问题陈述

由于缺乏临床研究，使用 Dahl 概念为树脂粘合固定局部义齿 (RBFPDP) 的金属保持器创造空间仍然存在争议。

目的

这项临床研究的目的是研究在增加的咬合垂直尺寸（达尔概念）下胶合的 RBFPDP 的咬合力和咬合接触重建，并评估影响它们的因素。

材料与方法

在 Teknologi MARA 大学牙科学院，对 28 名接受悬臂式 RBFPDP 的参与者进行了一项前瞻性临床研究，其咬合垂直尺寸增加。使用压力指示膜在入牙前、入牙后和 12 周复查时记录最大咬合力，而在入牙前阶段和 12 周复查时使用垫片箔评估咬合接触重建。Wilcoxon 符号秩检验和卡方检验用于统计分析 (α=.05)。

结果

在所有 28 名参与者中，发现前粘固和后粘固之间以及后粘固和 RBFPDP 的 12 周审查之间的最大咬合力存在显着差异（两者的P <.05）。然而，在优先和 12 周审查之间没有发现显着差异（P =.085）。发现关于性别、年龄、位置和假体弓的咬合力重建是相似的。大多数参与者 (89.3%) 实现了完全的咬合接触重建和 10.7% 的部分咬合重建。人口学和修复体因素与咬合重建无显着相关性（P >.05）。

结论

总体而言，咬合力在 12 周后重新建立，大多数参与者在以增加的咬合垂直尺寸放置 RBFPDP 后完全重新建立咬合接触。