Takebe Jun
Department of Removable Prosthodontics, School of Dentistry, Aichi Gakuin University, 2-11 Suemori- dori, Chikusa-ku, Nagoya, Aichi, 464-8651, Japan.
BMC Oral Health. 2025 Jan 29;25(1):157. doi: 10.1186/s12903-025-05553-x.
When designing removable partial dentures, maximizing the effectiveness of support and bracing is necessary to minimize denture movement. Therefore, it is essential to emphasize the importance of providing patients with appropriate, safe, and secure removable partial dentures and have clinicians rerecognize the concept and importance of support and bracing. This study aimed to present extension-base removable partial dentures through six specific clinical case series and describe the effect of support and bracing action on denture design, which is essential for denture movement minimization.
Case presentation: The case series highlights the importance of utilizing the contact between the axial surface of the abutment tooth and denture components to provide effective support and bracing action. Furthermore, it emphasizes the need to improve the bracing action by connecting the minor connector and proximal plate with the guiding plane set for multiple teeth (frictional control), control the direction of the denture during the placement/removal (path of insertion), and consider the major connector form to improve the support and bracing actions. Effective support and bracing actions are necessary not only for the retainer but also for the denture components, including the design of the denture base and major connector. Removable partial dentures with "frictional control" and "path of insertion" are expected to reduce denture movement and improve stability.
The denture design described in this study is essential in pre- and postgraduate dental education, and the author believes that it will be helpful for dental students, interns, or residents in clinical practice.
在设计可摘局部义齿时，有必要最大化支持和固位的效果以最小化义齿移动。因此，强调为患者提供合适、安全且稳固的可摘局部义齿的重要性，并让临床医生重新认识支持和固位的概念及重要性至关重要。本研究旨在通过六个具体的临床病例系列展示延伸基托可摘局部义齿，并描述支持和固位作用对义齿设计的影响，这对于最小化义齿移动至关重要。
病例展示：该病例系列突出了利用基牙轴面与义齿部件之间的接触来提供有效支持和固位作用的重要性。此外，它强调了通过将小连接体和近中板与为多颗牙齿设置的导平面相连（摩擦控制）来改善固位作用的必要性，在义齿就位/取下过程中控制义齿的方向（就位道），并考虑大连接体的形式以改善支持和固位作用。有效的支持和固位作用不仅对固位体而且对义齿部件（包括义齿基托和大连接体的设计）都是必要的。具有“摩擦控制”和“就位道”的可摘局部义齿有望减少义齿移动并提高稳定性。
本研究中描述的义齿设计在牙科研究生教育的前期和后期都至关重要，作者认为它对临床实践中的牙科学生、实习生或住院医生会有所帮助。
