Relationship of Denture Base to Tissues

By Dr.Swathi Pai on Tuesday, January 6, 2009 with 0 comments

A. Mandibular lingual flange: The most desirable feature of the lingual slope of the mandible is that it approaches 90 to the occlusal plane. The extent of the contact of the lingual flange with the lingual ridge slope is thereby dictated by the functional mobility of the floor of the mouth. Any flange extension below the mylohyoid ridge must incline medially away from the mandible, to allow for the mylohyoid muscle contraction.

B. Residual ridge anatomy:

1. Residual height and conformation- large , square, broad ridges offer a greater resistance to lateral forces than do small, narrow tapered ridges.
2. Arch form- square or tapered arches tend to resist rotation of the prosthesis better than ovoid arches.
3. Palatal vault- a steep vault may enhance stability by providing greater surface area of contact, and long inclines approaching a right angle to the direction of the force.

Category: Prosthodontics Notes



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