Evidence for Prosthodontic Intervention to the Shortened Dental Arch (SDA)

对缩短牙弓 (SDA) 进行修复干预的证据

• 批准号: 15592084
• 负责人: YAMASHITA Shuichiro
• 金额: $ 2.11万
• 依托单位: Matsumoto Dental University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15592084/
• 关键词: occlusal supports; shortened dental arch (SDA); radiograph; condylar displacements; patient's satisfaction

Purpose : In the last two decades, the Shortened Dental Arch (SDA) concept has been introduced as a treatment strategy for posterior edentulous patients! i.e. there is no need to restore the missing of molar region. On the other hand, clinical experience suggests various possibilities for functional disturbance starting from instability of occlusion. The purpose of this study is to clarify whether SDA concept fits for all posterior edentulous patients.Study selection : Ten patients with unilaterally posterior tooth missing were enrolled in this study, and a multiple evaluation for SDA condition was applied to them. This evaluation consists of the objective evaluation (radiographic evaluation for TMJ and measurement of condylar displacements during maximum voluntary clenching) and the subjective evaluation (questionnaire).Result : Abnormal radiographic appearances were observed in 50% of subjects. Condylar displacements during clenching were significantly high value in the edentulous-side condyle compared to that in the dentulous-side condyle. 40% of subjects showed high level of complains for SDA conditions.Conclusions : These results indicated the potential risks for the oral functions. We wish to propose the clinical guidelines for making a decision whether to "wait and see" the SDA patients without any positive treatment or to start prosthetic intervention immediately.

目的：在过去的二十年里，缩短牙弓（SDA）的概念已被引入作为后牙缺失患者的治疗策略！即不需要修复缺失的磨牙区域。另一方面，临床经验表明，从咬合不稳定开始的功能障碍的各种可能性。本研究的目的是阐明SDA概念是否适用于所有后牙缺失患者。研究选择：本研究入组了10例单侧后牙缺失的患者，并对他们进行了SDA状况的多重评估。该评价包括客观评价（TMJ的X线片评价和最大自主咬合时髁突位移的测量）和主观评价（问卷调查）。咬合过程中无牙侧髁突的位移值显著高于有牙侧髁突。40%的受试者表现出高水平的投诉SDA conditions.Conclusions：这些结果表明口腔功能的潜在风险。我们希望提出临床指南，以决定是否“等待和观望”SDA患者没有任何积极的治疗或立即开始修复干预。

项目成果

短縮歯列の概念

牙列缩短的概念

• 发表时间: 2004
• 期刊: 歯科臨床研究 1
• 作者: Sugeno H;Takebayashi Y;Nitta Y他;山下秀一郎 他
• 通讯作者: 山下秀一郎 他

Posterior occlusal supports and bite force influence to the mandibular position.

后牙合支撑和咬合力对下颌位置的影响。

• 发表时间: 2003
• 期刊: European Journal of prosthodontics and Restorative Dentistry 11・1
• 作者: Kozawa;T.;et al.
• 通讯作者: et al.

Kozawa, T.: "Posterior occlusal supports and bite force influence to the mandibular position."European Journal of prosthodontics and Restorative Dentistry. 11・1. 33-40 (2003)

Kozawa, T.：“后牙咬合支撑和咬合力对下颌位置的影响。”欧洲修复学和修复牙科杂志 11・1（2003 年）。

Evaluation of the Concept of Shortened Dental Arch (SDA) - Relationship between Occlusal Supports and Stomatognathic Function in SDA Patients-

短牙弓（SDA）概念的评估 - SDA 患者咬合支撑与口颌功能的关系 -

• 发表时间: 2003
• 期刊: The Journal of Japan Prosthodontic Society 47(5)
• 作者: Yamashita S.;et al.
• 通讯作者: et al.

短縮歯列(SDA)のコンセプト-短縮歯列患者の咬合支持と顎機能-

牙列短缩 (SDA) 概念 - 牙列短缩患者的咬合支撑和颌功能 -

• 发表时间: 2003
• 期刊: 日本補綴歯科学会雑誌 47・5
• 作者: Kozawa;T.;et al.;山下秀一郎 他
• 通讯作者: 山下秀一郎 他