Dec 06, 2021  
2021-2022 College Catalog 
    
2021-2022 College Catalog
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DLT 105LB - Partial Denture Construction Lab

3 Credits, 9 Contact Hours
0 lecture periods 9 lab periods

This is the Lab portion of DLT 105 . Construction of removable partial dentures (RPDs). Includes evaluation and fabrication of preliminary impressions and models, model survey and RPD design, evaluation and fabrication of final impressions and master models, block out procedures, model duplication and refractory casts, creating wax patterns, spruing and investing frameworks, burnout and alloy casts, and recovery of RPD casting. Also includes metal finishing and polishing, occlusion rims, prosthetic tooth selection and tooth setting, processing and finishing the RPD, and soldering of dental alloys.

Prerequisite(s): DLT 101  and DLT 101LB , or concurrent enrollment.
Corequisite(s): DLT 105  
Information: Consent of program director is required before enrolling in this course.


Course Learning Outcomes
  1. Demonstrate the ability to perform all laboratory steps involved in the fabrication and repair of removable partial dentures.

Performance Objectives:
  1. Perform infection control procedures on all incoming impressions and prostheses.
  2. Pour and trim preliminary and master models for removable partial dentures (RPDs).
  3. Define terminology associated with removable partial denture prostheses.
  4. Design various RPD frameworks using a preliminary model and a dental surveyor.
  5. Transfer framework design to the master cast and measure undercuts.
  6. Perform block out procedures to eliminate undesirable undercuts.
  7. Identify and explain safety procedures to eliminate undesirable undercuts.
  8. Duplicate a master cast.
  9. Prepare a refractory model.
  10. Identify and explain safety procedures in working with dental waxes.
  11. Fabricate RPD framework pattern on a refractory cast.
  12. Sprue and invest RPD framework for casting.
  13. Identify and explain safety procedures in burning out and alloy casting.
  14. Perform burn out procedures to eliminate wax and prepare molds to receive alloy.
  15. Identify and explain safety procedures in framework recovery and metal finishing.
  16. Perform recovery of framework castings.
  17. Describe the metal finishing and polishing of RPD frameworks.
  18. Set prosthetic teeth in wax trial bases on RPDs.
  19. Process and finish tooth setup on RPD frameworks.
  20. Perform soldered repairs on RPD frameworks.

Outline:
  1. Evaluation of Preliminary Impressions and Fabrication of Preliminary Models
    1. Interpretation of dental prescriptions and work authorizations
    2. Infection control and disinfecting procedures
    3. Impression evaluation
    4. Gypsum materials selection, manipulation, and safety procedures
    5. Preliminary model trimming and evaluation
  2. Preliminary Model Survey and Removable Partial Denture (RPD) Design
    1. Introduction to terminology associated with RPDs
    2. Theory of clasping teeth
      1. Support
      2. Retention
      3. Bracing
    3. Introduction to dental surveyors
      1. Desirable undercuts
      2. Undesirable undercuts
      3. Path of insertion
    4. Preparation of preliminary RPD design
    5. Discussion of dentists responsibility
      1. Approval of final RPD design
      2. Mouth preparation of patient
  3. Evaluation of Final Impressions and Fabrication of Master Models
    1. Interpretation of dental prescriptions and work authorizations
    2. Infection control and disinfecting procedures
    3. Impression evaluation
    4. Gypsum materials selection, manipulation, and safety procedures
    5. Master model trimming and evaluation
  4. Survey, Design Transfer to Master Model, and Block Out Procedures
    1. Determination of path of insertion
    2. Location and identification of desirable and undesirable undercuts
    3. Design transfer to master model
    4. Blocking out gross undercuts
    5. Blocking out undesirable undercuts
  5. Model Duplication and Refractory Casts
    1. Duplicating materials selection, manipulation, and safety procedures
    2. Production of a mold from master model
    3. Investment material selection, manipulation, and safety procedures
    4. Production of a refractory cast
  6. Creating Wax Pattern for RPD Framework
    1. Dental wax selection, manipulation, and safety procedures
    2. Use of preformed pattern pieces for RPD wax up
  7. Spruing and Investing RPD Frameworks
    1. Introduction to the theory of lost wax and centrifugal casting
    2. Lost wax casting and centrifugal casting safety procedures
    3. Development of a working sprue network
    4. Investment of RPD frameworks
  8. Burnout and Alloy Casting
    1. Gas torch and burnout furnace safety procedures
    2. Introduction to torch flame types
    3. Introduction to alloy melting and conditioning
    4. Burnout and cast RPD frame works
  9. Recovery of RPD Casting
    1. RPD recovery and oxide removal safety procedures
    2. Gross investment removal
    3. Aluminum oxide blasting
  10. Metal Finishing and Polishing
    1. Review of dental lathe, finishing, polishing, and electro polishing safety procedures
    2. Removal of button and sprue network
    3. Blending in sprue attachments
    4. Removing scratches with finer scratches
    5. Creating a hygienic surface
    6. Electro polishing
  11. Occlusion Rims, Prosthetic Tooth Selection, and Tooth Setting
    1. Prosthetic tooth placement and relationship to the edentulous ridge
    2. Baseplate wax manipulation and safety considerations
    3. Anterior tooth selection
      1. Face forms
      2. Shade
      3. Size
      4. Interpretation of dentist’s marking on occlusion rims
      5. Prosthetic tooth composition
    4. Posterior tooth selection
      1. Cusp angle
      2. Shade
      3. Size
      4. Interpretation of dentist’s marking on occlusion rims
      5. Prosthetic tooth composition
    5. Finishing the Wax Denture Base
      1. Gingival contour
      2. Inter-dental papilla
      3. Cuspid eminence
      4. Stippling
  12. Processing the Trial RPD
    1. Interpretation of dental prescriptions and work authorizations
    2. Infection control and disinfecting procedures
    3. Flasking dentures
    4. Boil out and wax elimination
    5. Packing denture mold
      1. Non-autopolymerizing acrylic resin manipulation and safety procedures
      2. Packing
      3. Clamping
      4. Heat processing
  13. Finishing RPDs
    1. Recovery
    2. Remounting of the semi-adjustable articulator
    3. Correcting processing errors
    4. Removing RPD from master cast
    5. Trimming to defined borders
    6. Stippling
    7. High shine
  14. Soldering of Dental Alloys
    1. Electro soldering and gas soldering safety procedures
    2. Matrixes/foils
    3. Fluxes
    4. Finishing


Effective Term:
Fall 2016



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