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Thursday, September 22, 2011

Over Denture-Definition,Advantages,Disadvantages


What is “Over Denture” (Definition)
a complete or partial removable denture supported by retained roots that is intended to provide improved support, stability, and tactile and proprioceptive sensation and to reduce ridge resorption.

Advantages of Over denture
          Preserve alveolar ridge
          Possibly
                -support
                -proprioreception
                -retention (eventually)
                -stress distribution

Disadvantages of Over denture
          Poor oral hygiene
                            -caries and periodontal disease
          Soft tissue undercuts
                -esthetics
                -retention
          Breakage of denture
                -thin
                -stress concentration over abutments

Criteria of Selection of abutment teeth for over  denture
          One per quadrant
          Not adjacent teeth
          Usually mandibular cuspids and premolars
          Maxillary cuspids frequently cause esthetic and retention problems due to soft tissue undercuts
Overdentures
          Regard as transitional
                - need perfect oral hygiene
                -daily non acidulated topical fluoride (sodium fluoride)
          Probably better to place 2 implants










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