RPD Insertion Flashcards
what is the objective of the insertion appointment
- to fit the denture base to the edentulous ridge
- to correct the occlusal discrepancies
- to adjust retentive clasps if necessary
- ton instruct the patient in home care
the denture base will usually exhibit heavy contact with the:
lateral walls, both buccal and lingual or palatal of the ridge
the denture base will exhibit light or no contact with:
the ridge crest
what are the most frequently observed undercutareas
- undercuts buccal to the edentulous ridge in the mandibular premolar
- maxillary tuberosity area
- mylohyoid ridge
denture base flange length contributes to:
- resistance to horizontal or lateral displacement of the denture
- a major share of vertical support for the partial denture
where are tooth-borne RPD evaluated and adjusted for occlusion
intra orally
how do you correct occlusal discrepancies in tooth tissue borne RPD
clinical remount
how should natural teeth contact
teeth which contact without the prosthesis in place continue to do so with the prosthesis in place
what are the steps in the clinical remounting procedure
- facebow
-pick- up impression
-block out undercuts
-remount cast and intra occlusal record - articulation
what does selective grinding do
- by altering the incline of a cusp, intereferences can be eliminate without changing cusp height
- the cusp tips should not be relieved arbitrarily
how should you adjust the retentive clasp
- at time of insertion use slightly less than maximum retention
- clasps should be adjusted in small increments
what tool should be used to adjust the half round, cast circumferential retentive clasp
- No. 139 plier
what is the home care instructions
- brush the RPD using soap and a denture brush
- prosthesis should be removed for 8 hours each day and soaked upon removal
what does soaking denture do
prevents distortion of the acrylic resin
why should the patient not soak in RPD in bleach
it will cause the metal to corrode and make the framework more brittle
how should the patient remove the RPD from the mouth
grasp acrylic resin denture bases on each side of the arch and carefully withdraw the removable partial denture from the mouth
when are adjustments done
- 24 hours after delivery and 1 week after insertion
- prosthesis should be inserted 4-5 hours before the appointment so that problem areas can be visualized
- use PIP to aid in locating overextension or pressure area
what are common complaints
- problems with phonetics
- cheek or tongue biting
- difficulty in chewing
- loose denture
- gagging
what causes problems with phonetics
- improper placement of the prosthetic anterior teeth or changes in the contour of the anterior palate
what happens if there is improper placement of maxillary and mandibular premolars if positioned too far lingually
the action of the tongue may be limited and speech may be affected
how are phonetics affected if positioned too far buccally
whistling or slurring of speech
how can you correct an RPD positioned too far buccaly
soft utility wax adapted to the lingual surfaces of the premolar teeth to decrease the escape of air and the whistling or slurring effect
what is cheek biting caused by
insufficient horizontal overlap between maxillary and mandibular teeth
how can horizontal overlap be increased to stop cheek biting
- if artificial teeth are correctly positioned- round the buccal cusps of mandibular posterior teeth to move cusps slightly lingual
- if artifical teeeth are incorrectly positioned reset teeth
