Dental Dentures: Partial | Cosmetic Dentistry
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8.4.1 Anchorage with Extracoronal Precision Attachments
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 90 (Partial Dentures: Anchorage with Precision Attachments) The effectiveness of prefabricated, standardized precision attachments is often over-estimated. It is quite common that after a relatively short period of time the originally favorable amount of retention no longer exists. The performance of precision attachments is largely dependent upon the type of case in which they are employed. In the case of a Kennedy Class III, very few problems would be anticipated. Also relevant to success is the question of whether or not the precision attachments can be left as long as possible in their vertical dimension (Fig. 90).
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 91 (Partial Dentures: Anchorage with Precision Attachments) Generally, the capabilities of extracoronal attachments are exceeded in cases of a Kennedy Class I or Class II due to the special requirements for support, stabilization and retention. This is especially true of cases where the attachment’s vertical dimension has been shortened due to a minimal space available. In all cases it is beneficial to relieve the attachment of such functions as dental support and bracing by the use of additional rests and bracing elements located elsewhere on the abutment crown(s). If the abutment crown is correctly designed, the partial denture can indirectly assist in the functions of dental support and bracing without such an ill- proportioned burden on the attachment itself (Fig. 91). |
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Tags: Dental Anchorage