Mandibular Atrophy and Its Impact on Overdenture Performance: Insights From a 5-Year Longitudinal Study

IF 4 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of oral rehabilitation Pub Date : 2025-11-26 DOI:10.1111/joor.70113

Fernanda Faot, Luciana Rezende Pinto, Lucas Jardim Da Silva, Laura Lourenço Morel, Otacílio Luiz Chagas-Júnior, Anna Paula Da Rosa Possebon

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引用次数: 0

Abstract

Background

The long-term influence of mandibular atrophy on masticatory function, patient-reported outcomes, and prosthetic maintenance in users of implant-retained overdentures remains unclear.

Objective

To assess the impact of mandibular bone atrophy on masticatory function, quality of life, patient satisfaction, and prosthetic maintenance over a five-year period.

Methods

Twenty-four fully edentulous patients were rehabilitated with mandibular overdentures retained by two narrow-diameter implants and divided into two groups according to mandibular bone height: atrophic mandible (AM) and non-atrophic mandible (NAM). Masticatory performance (MP) and swallowing threshold (ST) were assessed, while quality of life and satisfaction were evaluated using the Dental Impact on Daily Living (DIDL) questionnaire. Prosthetic maintenance events were recorded over 5 years. Multilevel mixed-effects regression evaluated temporal trends and group differences, and chi-square tests were used for prosthetic events.

Results

Four participants were lost to follow-up, resulting in 10 individuals per group at 5 years. The AM group showed significant reductions in MP_X50 (–9.66%; p = 0.00) and ST_X50 (–1.9%; p = 0.01); and increase in ST_ME5.6 (+43.32%; p = 0.01). The eating/chewing domain of the DIDL was significantly lower in the AM group (0.35 ± 0.72) compared to the NAM group (0.73 ± 0.47). Although overall prosthetic maintenance did not differ significantly, the AM group exhibited a higher frequency of Equator dislodgement (9.24%; p = 0.00) and attachment replacement (6.02%; p = 0.00).

Conclusion

Mandibular atrophy adversely affected masticatory function, patient-reported chewing satisfaction, and the frequency of specific prosthetic complications over 5 years.

Abstract Image

查看原文本刊更多论文

下颌萎缩及其对覆盖义齿性能的影响：来自5年纵向研究的见解。

背景：下颌萎缩对种植覆盖义齿使用者咀嚼功能、患者报告的结果和义肢维护的长期影响尚不清楚。目的：评估下颌骨萎缩对咀嚼功能、生活质量、患者满意度和修复体维护的影响。方法：对24例全牙缺失患者采用两种窄径种植体保留下颌覆盖义齿进行修复，根据颌骨高度分为萎缩性下颌骨（AM）组和非萎缩性下颌骨（NAM）组。评估咀嚼功能（MP）和吞咽阈值（ST），同时使用牙齿对日常生活的影响（DIDL）问卷评估生活质量和满意度。假体维护事件记录超过5年。多水平混合效应回归评估时间趋势和组间差异，卡方检验用于修复事件。结果：4名参与者失去随访，5年时每组10人。AM组MP_X50 （-9.66%, p = 0.00）、ST_X50 （-1.9%, p = 0.01）显著降低；ST_ME5.6升高（+43.32%;p = 0.01）。AM组进食/咀嚼区DIDL（0.35±0.72）明显低于NAM组（0.73±0.47）。虽然整体假体维持没有显著差异，但AM组出现赤道移位（9.24%,p = 0.00）和附着体置换（6.02%,p = 0.00）的频率更高。结论：下颌萎缩在5年内对咀嚼功能、患者报告的咀嚼满意度和特定义肢并发症的频率产生不利影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of oral rehabilitation 医学-牙科与口腔外科

CiteScore

5.60

自引率

10.30%

发文量

116

审稿时长

4-8 weeks

期刊介绍： Journal of Oral Rehabilitation aims to be the most prestigious journal of dental research within all aspects of oral rehabilitation and applied oral physiology. It covers all diagnostic and clinical management aspects necessary to re-establish a subjective and objective harmonious oral function. Oral rehabilitation may become necessary as a result of developmental or acquired disturbances in the orofacial region, orofacial traumas, or a variety of dental and oral diseases (primarily dental caries and periodontal diseases) and orofacial pain conditions. As such, oral rehabilitation in the twenty-first century is a matter of skilful diagnosis and minimal, appropriate intervention, the nature of which is intimately linked to a profound knowledge of oral physiology, oral biology, and dental and oral pathology. The scientific content of the journal therefore strives to reflect the best of evidence-based clinical dentistry. Modern clinical management should be based on solid scientific evidence gathered about diagnostic procedures and the properties and efficacy of the chosen intervention (e.g. material science, biological, toxicological, pharmacological or psychological aspects). The content of the journal also reflects documentation of the possible side-effects of rehabilitation, and includes prognostic perspectives of the treatment modalities chosen.