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The vertical nonparallel pin splint. Part II. Construction, cementation, and troubleshooting

Authors
Journal
Journal of Prosthetic Dentistry
0022-3913
Publisher
Elsevier - Mosby
Publication Date
Volume
21
Issue
2
Identifiers
DOI: 10.1016/0022-3913(69)90087-0
Keywords
  • Fixed Partial Dentures

Abstract

Abstract Nonparallel pins are preferred to parallel pins, because they are more retentive and do not require the use of any intraoral paralleling device. Partial coverage abutments in either type of restoration should be prepared with resistance forms to prevent the application of lateral shearing stresses directly on the pins. New anterior and posterior abutment preparations that can be used in both parallel and nonparallel pin restorations were described. Step-by-step instrumentation was outlined to prevent failures of vertical nonparallel pin restorations. One-step cementation is recommended for vertical nonparallel pin restorations. An alternative two-step cementation also was described as a “back up” procedure in case some difficulty arises. Solutions for troubleshooting problems, such as a pin preparation not aligned with the gold casting, a nonretentive threaded pin, a pin broken during cementation, and a preparation for threaded-pin retention in gold, were discussed.

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