Denture Design Flashcards
What factors with the fitting surface can optimise retention and stability?
Greater base extension in the maxilla
- Full coverage of the denture bearing area.
Adequate post dam seal- at the vibrating line.
- close adaptation to the palate.
Adequate extension into the lingual pouch and the retromolar pad (2/3 the way along the retromolar pad).
What factors can make retention and stability difficult?
Atrophic ridges
Incomplete palates- cleft lip and palate
Flabby ridges
Patients with bad gag reflex
Insufficient saliva
What factors with the occlusal surface can optimise retention and stability?
Ensure teeth are over the alveolar ridge in the lower denture- within the neutral zone.
- If lower teeth are too lingual, dislodged by the tongue.
Upper teeth are set slightly buccal?
What factors can be used to help with tooth selection?
Previous dentures
Ageing
Physiological perceptions
Previous photos of natural teeth
Patient preference
Patient role modelling
What materials are used for teeth?
Acrylic
Porcelain
Composite resin based
Combinations
How can you determine the mould of teeth required for a complete denture?
Measure the distance between both canine lines- this will tell you the width from one canine to another.
- Use this value to which one corresponds to the mould guide.
Also measure the length and width of the central incisor- this will be on the mould as well.
What can be used to determine the position of upper incisor teeth?
Alma Gauge- tip of the anterior teeth should be 5.5mm anterior to the incisive papilla.
What factors influence the choice of posterior teeth?
Ridge resorption
- If the ridge is very narrow, need narrow teeth.
Neuromuscular control
Reproducibility of occlusal position
When might you use cusp less teeth?
If the ridge is very resorbed.
If you cannot get a reproducible jaw relationship.
