ideal for cases where there is a risk of tooth tissue loss.
Indications
(1) amelogenesis imperfecta;
(2) dentinogenesis imperfecta;
(3) dental erosion, attrition, or abrasion;
(4) enamel hypoplasia.
Armamentarium
(1) gingival retraction cord;
(2) elastomeric impression material;
(3) facebow system;
(4) semi-adjustable articulator;
(5) rubber dam;
(6) Panavia Ex (Kuraray).
Technique
- Obtain study models (these are essential) and photographs if possible.
- Perform a full mouth prophylaxis.
- Ensure good moisture isolation.
- Place retraction cord into the gingival crevices of the teeth to be treated and remove
immediately prior to taking the impression. - Take an impression using an elastomeric impression material⎯a putty/wash system
is the best and check the margins are easily distinguishable. - Take a facebow transfer and interocclusal record in the retruded axis position.
- Mount the casts on a semi-adjustable articulator.
- Construct cast onlays, a maximum of 1.5 mm thick occlusally in either nickel/
chrome or gold. - Grit-blast the fitting surfaces of the occlusal onlays.
- Return to the mouth and check the fit of the onlays.
- Polish the teeth with pumice and isolate under rubber dam where possible.
- Cement onlays using Panavia Ex.
- Check occlusion.
- Review in 1 week for problems, and regularly thereafter.