Berg T, Caputo A A
J Prosthet Dent. 1978 Feb;39(2):139-46. doi: 10.1016/s0022-3913(78)80010-9.
Positive anterior rests were shown to be an essential element of design when considering stress distribution with a removable partial denture involving anterior teeth. Proximal plates often added stability and reduced stress accumulation in any one region. Distobuccal forces on the extension base adversely affected the primary canine abutment. Forces in the regions of the anterior base and central incisor abutment produced the most widespread transmission of stress throughout the arch. Greater stress throughout the arch was observed when forces were applied to the central incisor rather than to the right canine abutment. There is a need for established criteria of rest form and placement. Guidelines for using the natural crown as opposed to a positive rest seat in a restoration are needed. Continuing studies of other anterior rest forms should increasingly clarify this phase of treatment planning. The dentist should recognize the need for structural integrity in the anterior maxillary segment when designing removable partial dentures. A practical, defensible rationale for the routine use of maxillary anterior teeth as removable partial denture abutments must be established.
当考虑涉及前牙的可摘局部义齿的应力分布时，阳性前牙支托被证明是设计的一个基本要素。近中板通常会增加稳定性并减少任何一个区域的应力积累。延伸基托上的远中颊向力对主要尖牙基牙有不利影响。前基托和中切牙基牙区域的力在整个牙弓中产生了最广泛的应力传递。当力作用于中切牙而不是右侧尖牙基牙时，整个牙弓观察到更大的应力。需要建立支托形式和放置的既定标准。需要有关在修复中使用天然牙冠而非阳性支托座的指导原则。对其他前牙支托形式的持续研究应越来越多地阐明治疗计划的这一阶段。牙医在设计可摘局部义齿时应认识到上颌前部结构完整性的必要性。必须为常规使用上颌前牙作为可摘局部义齿基牙建立一个实用、合理的理论依据。
