Prosthodontics

adv - cheaper, removal for hygiene, minimally invasive disadv - may be bulky and less aesthetic, less retention and stability

an opposing molar or premolar - should aim to have 3-5, molar is 2 units, premolar is 1

mandibular and alveolar bone resorption, decreased chin to nose distance as chin protrudes, tooth movement - over eruption or drifting

aesthetics, functional - eating and speaking, may result in malabsorption and weight loss, psychological

where it extends into vestibular sulcus

class I - bilateral free end saddle class II - unilateral free end saddle class III - unilateral bounded saddle class IV - bounded saddle crossing the midline

classified on most posterior saddle, any additional anterior saddles are a modification

resistance of denture to occlusally directed load

craddock classification 1 - tooth only, 2 - mucosa only, 3 - tooth and mucosa

down the long axis of the tooth, through periodontal ligament to alveolar bone, if bounded saddle adjacent to saddle, if free end, should be on the other side

distal axial torque of the abutment tooth, when the force is not down the long axis

the surface area of the root - molars, canines, premolars then incisors in order of most force

transmits force directly through to alveolar bone, which can increase bone resorption, need a large area to reduce resorption. soft tissue is also more compressible so more movement of denture

0.5mm

using wax to remove any unwanted or unused undercuts between high and low survey line

if undercuts are not removed, acrylic will be produced that goes into this undercut, the denture then wont be able to fit over the most bulbous part of the tooth, dentist will have problems trying to seat the denture

wax put over cast then chisel on surveyor to remove excess wax, can also use plaster

to have a working cast and a master cast

use an investment material and place cast inside, either hydrocolloid or sillicone is poured into this investment material, basically takes another set of impressions. the cast is then removed, impression left and stone is poured in, produce another cast

for producing a wax design

when producing cocr in an investment material, a cast is required to withstand temperatures of 1000 degrees, stone and plaster cannot so another cast is required made of material that will

adhesion at posterior periphery of upper denture in palate, before palatine fovea

anteriorly at gingival margin, ensures food and plaque cannot get underneath the denture - flush fitting

resistance to vertical displacement of denture