Marin Danny Omar Mendoza, Dias Kássia de Carvalho, Paleari André Gustavo, Pero Ana Carolina, Arioli Filho João Neudenir, Compagnoni Marco Antonio
Department of Dental Materials and Prosthodontics, Araraquara Dental School, Universidade Estadual Paulista (UNESP), Humaitá Street 1680, 14801-903 Araraquara, SP, Brazil.
Department of Restorative Dentistry, Alfenas Dental School, Federal University of Alfenas, Alfenas, MG, Brazil.
Case Rep Dent. 2015;2015:502394. doi: 10.1155/2015/502394. Epub 2015 Dec 3.
During oral rehabilitation of an edentulous patient with an implant-supported prosthesis, mandibular flexure must be considered an important biomechanical factor when planning the metal framework design, especially if implants are installed posterior to the interforaminal region. When an edentulous mandible is restored with a fixed implant-supported prosthesis connected by a fixed full-arch framework, mandibular flexure may cause needless stress in the overall restorative system and lead to screw loosening, poor fit of prosthesis, loss of the posterior implant, and patient's discomfort due to deformation properties of the mandible during functional movements. The use of a split-framework could decrease the stress with a precise and passive fit on the implants and restore a more natural functional condition of the mandible, helping in the longevity of the prosthesis. Therefore, the present clinical report describes the oral rehabilitation of an edentulous patient by a mandibular fixed implant-supported prosthesis with a split-framework to compensate for mandibular flexure. Clinical Significance. The present clinical report shows that the use of a split-framework reduced the risk of loss of the posterior implants or screws loosening with acceptable patient comfort over the period of a year. The split-framework might have compensated for the mandibular flexure during functional activities.
在为无牙颌患者进行种植支持式修复体的口腔修复时，在设计金属支架时，必须将下颌弯曲视为一个重要的生物力学因素，尤其是当种植体安装在孔间区域后方时。当用固定的全牙弓支架连接的种植支持式固定修复体修复无牙颌下颌时，下颌弯曲可能会在整个修复系统中产生不必要的应力，并导致螺钉松动、修复体贴合不良、后部种植体脱落以及由于下颌在功能运动中的变形特性而引起患者不适。使用分体式支架可以通过精确且被动地贴合种植体来降低应力，并恢复下颌更自然的功能状态，有助于延长修复体的使用寿命。因此，本临床报告描述了一名无牙颌患者通过带有分体式支架的下颌种植支持式固定修复体进行口腔修复以补偿下颌弯曲的情况。临床意义。本临床报告表明，使用分体式支架在一年的时间里降低了后部种植体脱落或螺钉松动的风险，且患者舒适度可接受。分体式支架可能在功能活动期间补偿了下颌弯曲。
