Porcelain And Acrylic Teeth

Question 1

What is a tissue conditioner?

Answer 1

temporarily applied to permit a more equal distribution of load and assumption of more normal mucosal position. E.g.. Immediate denture a few weeks after extractions, following infection of denture bearing area to adapt fit to healing tissues.

Question 2

What is a functional impression material?

Answer 2

applied to fit surface to allow a more definitive impression to be taken under functional conditions.

Question 3

What is a permanent resilient lining?

Answer 3

applied as a “shock absorber” to avoid pain from movement of the denture upon nerves (mental nerve with atrophic ridge) or of obturator/facial prostheses against bearing structures. Useful also to utilise undercuts by flexing in and out.

Question 4

What are the properties of tissue conditioners and functional impression materials?

Answer 4

None irritant
•None toxic
•Set material;
•Tissue conditioner – soft but not capable of undergoing substantial permanent deformation – so is elastic
•Functional impression material – soft but deforms plastically to record impression of denture bearing area or neutral zone.
•Many are visco-elastic – flow under pressure but resilient under dynamic forces such as chewing.