Tooth Prep. for RPDs Flashcards
what are the four phases of a restorative treatment plan?
- immediate treatment
- initial (hygienic or preparatory) phase
- reconstructive (corrective) phase
- maintenance
what is the immediate treatment phase?
patient who comes in complaining of pain or who has an acute infection relating to their teeth (needs managed straight away)
what is an example of immediate treatment?
extraction of tooth
what is the initial phase of RPD plan?
dentist establishes oral and dental health status
what could occur during the initial phase of the RPD treatment plan?
- scaling and root planing
- periodontal probing
- investigate diet
- alcohol & smoking advice
what is the reconstructive phase of the RPD treatment plan?
deciding how the RPD is going to be designed
what are the main aspects of mouth preparation?
- initial prosthetic treatment
- pre-prosthetic surgery
- periodontal treatment
- orthodontic treatment
- fixed prosthodontic treatment and endodontics
- tooth prep
what is initial prosthetic treatment?
- repairs and additions to current RPD / teeth
- temporary relines of denture
- occlusal adjustment
- treatment of denture stomatitis
what is pre-prosthetic surgery?
- remove retained roots / unerupted teeth
- remove any pathology
- improve contours or edentulous areas (by reducing bony prominences and hyperplastic soft tissues)
- eliminate prominent fraenal attachments
what is periodontal treatment?
- establish health in perio tissues
- assess patient motivation
- detailed instruction in oral hygiene procedures
- scaling and root planing
- periodontal surgery
what is orthodontic treatment?
• to optimise space
• to optimise abutment alignment
(may be used in cleft patients, hypodontia patients, perio patients)
why do we need to prepare teeth before?
- provide rest seats
- establish guide surfaces
- modify unfavourable survey lines
- create retentive areas
what instruments are normally used for tooth prep?
- rotary diamond instruments
* special burrs, stones and abrasive-impregnated rubber wheels/points
why are rotary instruments used in tooth prep?
to shape enamel surfaces
why are special burrs/stones/rubber wheels etc used in tooth prep?
to smooth and polish the resultant roughened enamel surface
what is the purpose of rest seats?
- produce favourable tooth surface for support
- prevent interference with occlusion
- reduce prominence of the rest (so patient isn’t aware of it)
what teeth are more suitable for rest seat modification?
- well formed cingulums are normally chosen as it is easier to get good attachment
- maxillary canines are a good choice
what other ways can rest seats be used?
- produce a rest seat in composite applied to cingulum area
- bond a cast metal cingulum to tooth
what are guide planes?
two or more parallel axial surfaces on abutment teeth, which limit the path of insertion of a denture
what do guide planes provide?
- increased stability
- reciprocation
- prevention of clasp deformation
- improved appearance
how are guide planes prepared?
- guide surface should extend vertically 3mm but be kept as far from the gingival margin as possible
- not more than 0.5mm of enamel should be removed
how can retentive areas be created?
by addition of acid-etched composite (ultra fine or hybrid composites)
