Oral health self-perception evaluation using mandibular overdenture prosthesis in public health care

Objective: The aim of this study was to evaluate the impact on oral health in patients who used to have conventional lower denture and then started using a model of overdenture prosthesis for the purpose of its use in public health care. Methods: For this clinical trial study, 23 volunteers participated in the sample. To stabilize the prosthesis three implants were used and immediately loaded. Only one punch was needed for each implant to be installed, neither a flap nor suture was necessary. To evaluate the oral health self-perception the volunteers answered the OHIP-14 questionnaire twice, the first time before the treatment when they still used the conventional lower denture, and the second time within an average of 36 days after the use of the prosthesis stabilized by the implant/O-ring together. For statistical analysis, exploratory data analysis was initially performed and then the nonparametric Wilcoxon test was applied considering a significance level of 5%. Results: The average age of the sample was 57.6 years old (SD=9.0) with a minimum age of 43 and maximum of 74 years old. The results show a significant decrease in all domains after the treatment, functional limitation (p=0.0002), physical pain (p<0.0001), psychological discomfort (p=0.0002), physical disability (p< 0.0001), psychological disability (p=0.0008), social disability (p=0.0431) and handicap (p=0.0015). Conclusion: It was concluded that the model of overdenture prosthesis improved the volunteers oral health self-perception.

研究目的：本研究旨在评估曾使用传统下颌活动义齿，后改用覆盖义齿修复体模型以应用于公共卫生保健的患者，其口腔健康状况所受的影响。

研究方法：本临床试验共纳入23名志愿者作为研究样本。为实现义齿稳定，采用3枚种植体并实施即刻负重；每枚种植体仅需一次钻孔即可植入，无需翻瓣及缝合操作。为评估志愿者的口腔健康自我感知状况，受试者需完成两次口腔健康影响量表14项版（OHIP-14）问卷填写：首次在治疗前，即仍使用传统下颌活动义齿时；第二次在使用种植体/O形环联合稳定的覆盖义齿后平均36天内。统计分析阶段，首先开展探索性数据分析，随后采用非参数威尔科克森检验（Wilcoxon test），设定显著性水平为5%。

研究结果：本研究样本的平均年龄为57.6岁（标准差SD=9.0），年龄跨度为43~74岁。结果显示，治疗后各维度得分均显著降低：功能受限（p=0.0002）、躯体疼痛（p<0.0001）、心理不适（p=0.0002）、躯体功能障碍（p<0.0001）、心理功能障碍（p=0.0008）、社会功能障碍（p=0.0431）以及残障程度（p=0.0015）。

研究结论：本研究证实，该覆盖义齿修复体模型可显著改善志愿者的口腔健康自我感知状况。