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