Mendoza-Carrasco Inti, Hotta Juliana, Sugio Carolina Yoshi Campos, Procópio Andréa Lemos Falcao, Urban Vanessa Migliorini, Mosquim Victor, Foratori-Junior Gerson Aparecido, Soares Simone, Neppelenbroek Karin Hermana
Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil.
Departament of Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.
J Indian Prosthodont Soc. 2020 Jul-Sep;20(3):278-284. doi: 10.4103/jips.jips_459_19. Epub 2020 Jul 17.
The aim was to discuss the indications, contraindications, advantages, and disadvantages of Nonmetal clasp dentures (NMCDs), as well as the most relevant properties of its constituent materials. A search was conducted using the keywords: "nonmetal clasp dentures," "thermoplastic resin," "flexible resin removable partial denture," "polyamide," and "nylon" in databases PubMed/Medline, Lilacs, SciELO, and textbooks between 1955 and 2020. Theses and texts without reliable sources of publication were excluded. Once the analysis instruments were determined, the data were analyzed and discussed. NMCDs present high flexibility, easy adaptation to the abutments, color compatibility and biocompatibility with the oral mucosa, and absence of visible metal clasps. However, they need laboratory relining, grinding, and polishing, do not have criteria for its planning, become rougher and stained over time, and are able to traumatize supporting tissues. The association with metal components seems to be an alternative to increase the success of NMCDs by combining esthetics and biomechanical principles of conventional removable partial dentures. The lack of long-term clinical studies makes the professionals to rely solely on previous experiences or on the manufacturers' recommendations. It suggested that NMCDs must be indicated with caution when not used temporarily.
目的是探讨非金属卡环义齿（NMCDs）的适应证、禁忌证、优缺点，以及其组成材料的最相关特性。在1955年至2020年期间，使用关键词“非金属卡环义齿”“热塑性树脂”“柔性树脂可摘局部义齿”“聚酰胺”和“尼龙”在PubMed/Medline、Lilacs、SciELO数据库以及教科书中进行检索。排除没有可靠出版来源的论文和文本。确定分析工具后，对数据进行分析和讨论。NMCDs具有高柔韧性、易于贴合基牙、与口腔黏膜颜色相容和生物相容性，且无可见金属卡环。然而，它们需要实验室重衬、打磨和抛光，没有规划标准，随着时间推移会变得更粗糙且染色，并且会损伤支持组织。与金属部件结合似乎是一种通过结合传统可摘局部义齿的美学和生物力学原理来提高NMCDs成功率的替代方法。缺乏长期临床研究使得专业人员只能依靠以往经验或制造商的建议。建议在非临时使用时，必须谨慎使用NMCDs。
