Download - Porcelain laminate veneers (Dentistry)
porcelain laminate veneer
what is dental veneers? Dental veneers are custom made shells made from tooth colored materials that facilitate covering the front surface of the tooth and these are alternately known as dental laminates.
Dental veneers are normally classified under cosmetic dentistry
Indications of veneers
Esthetically compromised anterior teeth
Poorly shaped or crooked teeth Stained teeth (intrinsic/extrinsic) Closure of diastemas Enamel hypoplasia Fractured teeth Anatomically malformed teeth Tooth wear
Contraindications Crowded or misaligned teeth Teeth with inadequate enamel present
Patient with habitual clenching and grinding
Non-ideal occlusion Periodontal disease Teeth weakened by existing large restorations
Advantages Esthetic stability Stain resistant Stronger and durable Gum tissue tolerates porcelain well The color of a porcelain veneer can be selected such that it makes dark teeth appear whiter. Veneers offer a conservative approach to changing a tooth's color and shape.
Disadvantages of porcelain veneers The process is irreversible
More costly than composite veneers Not suitable for patients with clenching or grinding habits
Not repairable should they chip or crack Tooth may become more sensitive to hot and
cold foods and beverages They can dislodge and fall off Technique sensitive
technique (VENEER PREPARATION
PROCEDURE) Shade Selection- Clean teeth with pumice and water
Select a tentative shade with the patient participating
Tooth preparation- A uniform 0.5mm intraenamel reduction is sufficient
Preparations are extended to the gingival crest and into
the interproximals without breaking contact Impression- The retraction cord should be left in place if
possible during the impression Use a polysiloxane or polyether material for
the impression Clinical try-in- Contacts need to be carefully assessed
Proximal contacts can be adjusted
CEMENTATION
Steps Try-in paste allow you to mask any underlying
color abnormalities and select cement shade. Apply saline solution to the internal aspect of
the veneer. Etch, rinse, dry but do not dessicate. Apply primer/adhesive to the tooth and lightly
air dry. Apply cement to the internal aspect of the
veneer, seat the veneer, clean off excess cement, light cure.
Floss contacts and adjust occlusion.
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