Mensor M C
J Prosthet Dent. 1977 Apr;37(4):366-73. doi: 10.1016/0022-3913(77)90137-8.
Scientific evidence of both constructive and destructive movements of teeth has influenced the design and selection of attachments for overdentures. Dowel designs that would be acceptable for normal copings must be reconsidered in view of the mechanical effectiveness of parallel-walled dowels and screws. Coping designs for attachment overdentures must provide retention, resistance to rotation, and bulk when joined with the dowel and attachment, without negating the advantage of the reduced crown-root ratio. Splinting with a bar-type attachment (1) has advantages over splinting with a stud-type attachment that outweigh the disadvantages of bulk and (2) provides ease of replacement when one of several remaining teeth is excessively mobile. Part II will consider the various types of bar, stud, and auxillary attachments for the overdenture.
牙齿的建设性和破坏性移动的科学证据影响了覆盖义齿附着体的设计和选择。鉴于平行壁桩钉和螺钉的机械效能，对于普通冠套可接受的桩钉设计必须重新考虑。附着式覆盖义齿的冠套设计在与桩钉和附着体连接时必须提供固位、抗旋转能力和体积，同时又不能否定减小冠根比的优势。采用杆式附着体进行夹板固定（1）比采用柱式附着体进行夹板固定具有更多优势，其优势超过了体积方面的劣势，并且（2）当几颗余留牙中的一颗过度松动时便于更换。第二部分将探讨覆盖义齿的各种杆式、柱式和辅助附着体。
