Mouth Preparation and Master Casts Flashcards
What is phase I of patient treatment?
– Relief of pain & infection
– Collection of diagnostic data (Diagnostic cast, Diagnostic mounting)
– Develop treatment plan/Design RPD
– Patient education & motivation
– Occlusal equilibration
What is phase II of patient treatment?
– Removal of deep caries, temporary restorations
– Extraction of non-retainable teeth
– Preprosthetic surgery: tuberosity reduction, etc.
– Periodontal treatment, Plaque control
– Interim prosthesis: function, esthetics
– Occlusal equilibration, may need changes after extractions
What is phase III of patient treatment?
– Definitive endodontic treatment
– Definitive restorative treatment
* Surveyed crowns, if needed
* Fixed partial dentures, if appropriate
– Occlusal plane correction
What is phase IV of patient treatment?
– Construction RPD
What is phase V of patient treatment?
– Post-insertion care
– Periodic recall
– Continued plaque control
What is involved in mouth preparation?
- Relief of pain & infection
- Caries removal
- Extractions, Preposthetic surgery
- Periodontal treatment, plaque control
- Occlusal equilibration
- Endodontics
- Definitive Restorative Treatment
- Occlusal plane correction
- Enameloplasty for RPD
What do you draw on the diagnostic cast?
- preliminary design of RPD
- identify tooth modification areas
How do you decide what tooth modifications need to be made?
– according to RPD diagnostic cast design
– QA Worksheet
What are the steps for an enamoplasty for RPD?
- Develop Guide Planes
- Enlarge embrasure for minor connectors
- Lower Height of Contour
- Create undercuts if needed
- Prepare rest seats
Where are guide planes that you develop on the proximal side of teeth?
adjacent to edentulous areas
What are guide planes for on the ML side of teeth?
stress-release clasps ML minor connector
What is the guide planes for on the lingual side of teeth?
reciprocal clasp
What should the height of contour be lowered for on the tooth?
– Proximal 2/3 Circumferential retentive clasp
– Reciprocal clasp
– Lingual Guide Plate
What is the sequence to confirm that preps are parallel to path of insertion?
- Prepare guiding planes
- Enlarge embrasures for minor connectors
- Reposition the survey line to reduce interferences to framework placement and enable most ideal clasp placement
When doing an undercut preparation what is contraindicated?
Sloped buccal &/or lingual surface
When doing an undercut preparation what is indicated?
slightly insufficient retentive undercut with vertical buccal & lingual surfaces
When would you do an undercut preparation?
Used when slightly insufficient retentive undercut
How do you check adequacy of the occlusal/embrasure rest seats?
– Patient close into beading wax
– Measure thickness of wax (Caliper)
* At least 1mm
What should you do if you are unable to attain adequate depth within enamel for the rest seat?
Remove small amount of opposing tooth structure
– Be sure to remake impression of opposing arch
When do you do a rest seat preparation?
After adequate preparation for GP, Survey line alterations
What is the preferred technique for class III RPD impression technique?
Custom tray/elastomeric material
- not border molded
- medium-bodied PVS
What are the different options for a class III RPD impression technique?
- Alginate/stock tray
- Alginate/custom tray
- Custom tray/elastomeric material
What is an important source of RPD support?
residual ridge
What is the broad-stress distribution concept?
- Distribute occlusal forces over as many teeth & as much soft tissue as possible
- Not overload teeth or tissue
- Increased stability & retention
- Less frequent reline
