Manuals_files/CD Manual 12.pdf - Removable Prosthodontics

Selecting & Setting Teeth - 43
- Use the Portrait Shade number and not the Vita shade code when prescribing denture
teeth from the Portrait shade guide. (Portrait numbers begin with a "P" and are listed
as the bottom-most shade code on the shade tabs)
- Anterior and posterior tooth shades are the same (e.g. anterior shade P3.5 corresponds
with posterior shade P3.5)
- Shade selection for porcelain restorations should be made with the Vita shade guides
- If you need to match a porcelain restoration to denture teeth, select the Vita shade for
porcelain and pick the corresponding Portrait shade (P1-P34) for theVita shade (the
Vita shades are listed on the top of the Portrait shade tabs )
- The patient should choose the shade guided by the dentist – if they want the whitest
teeth possible, offer your opinion, don't persuade
- Use the squint test for value (brightness) - squinting reduces the influence of hue - if the
teeth look too bright while squinting, suggest something less bright
Material
- Porcelain teeth are becoming less prevalent
- Acrylic much easier to set and adjust; they will last life of denture (5-7 years)
Porcelain
Acrylic
- wear less - new materials wear well
- more translucent - better teeth have layers to improve transluc.
- brittle - fracture easily if dropped - resilient - acts as shock absorber
- don't bond to base (stain, fall out) - chemically bonds to base
- difficult to adjust/set - quieter; gum sticks
Selecting Posterior Teeth Form (shape of the posterior teeth)
Anatomic (40 °, 30°, 20°(semi-anatomic), 10°)
- More esthetically pleasing (especially in the premolar region) – use for patients with
esthetic concerns, if there are no contraindications (severe ridge resorption, jaw
malrelations, uncoordinated jaw movement)
- Use when a balanced occlusion is desired – they are easier to balance. Select a tooth
cusp angle similar to the condylar inclination
- Use when coordinated jaw movements are present