Jan 25, 2022  
2021-2022 College Catalog 
2021-2022 College Catalog
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DLT 201LB - Dental Laboratory I Lab

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

This is the Lab portion of DLT 201 . Introduction to the principles and techniques used in the dental laboratory. Includes fabrication and articulation of removable die models, spruing, investing, and casting crown and bridge patterns. Also includes repairs, soldering, and functional occlusion in wax crown, bridge patterns, crown metal castings, and bridge metal castings.

Prerequisite(s): DLT 101  and DLT 101LB  
Corequisite(s): DLT 201  
Information: Consent of program director is required before enrolling in this course.

Course Learning Outcomes
  1. Demonstrate the ability to perform all steps required to fabricate removable die models for the fabrication of fixed crown and bridge work.
  2. Demonstrate the ability to perform soldered repairs to fix crown and bridge work.

Performance Objectives:
  1. Perform asepsis procedures on incoming impressions.
  2. Discuss relative advantages and disadvantages of various crown and bridge impression materials.
  3. Identify the different types of stock and custom trays used in crown and bridge.
  4. Perform fabrication of removable die models.
  5. Demonstrate how to mount removable die models on various articulators.
  6. Describe the different types of die construction.
  7. Develop functional occlusion in wax crown and bridge patterns.
  8. Refine functional occlusion in crown and bridge casting.
  9. Discuss the principals of metal flow during centrifugal casting.
  10. Construct sprue networks in wax.
  11. Identify, diagnose, and correct miscasts.
  12. Demonstrate how to adjust the fit of castings through the manipulation of expansion.
  13. Construct a soldering matrix.
  14. Perform basic soldered repairs to cast crowns and bridges.

  1. Fabrication of Removable Die Models
    1. Prescriptions and work authorizations
    2. Interpretation of dental prescriptions and work authorizations
    3. Types of impression materials and special handling requirements
    4. Types of impression trays/advantages and disadvantages of each
    5. Infection control and disinfecting procedures
    6. Evaluation of impressions and common distortions
    7. Gypsum materials selection, manipulation and safety procedures
    8. Non-gypsum die materials
    9.        Recover and evaluate casts
    10. Grind, pin, and base casts
    11. Section, bulk trim, and refine margin
  2. Articulation of Removable Die Models
  3. Articulator types and selection
    1. Advantages and disadvantage of various articulators
    2. Pin access
    3. Use of bites
    4. Articulators as an approximation of the temporal mandibular join (TMJ)
  4. Functional Occlusion in Wax Crown and Bridge Patterns
    1. Identification and selection of dental waxes
    2. Safe heating and use of dental wax
    3. Correcting for wax discrepancies
    4. Articulator movements vs. TMJ movements
    5. Occlusal contacts
    6. Use of articulating film or ribbon
  5. Functional Occlusion in Crown and Bridge Metal Castings
    1. Correcting for casting discrepancies
    2. Articulator movements vs. TMJ movements
    3. Occlusal contacts
    4. Use of articulating film or ribbon
  6. Spruing, Investing, and Casting Crown and Bridge Patterns
    1. Burnout, torch, centrifugal metal casting, techniques, and safety procedures
    2. Physics principals of metal flow during centrifugal metal casting
    3. Lost wax casting basics
    4. Design and construction of a wax sprue network
    5. Diagnosis and correction of miscasts
    6. Manipulation of expansion to correct for metal shrinkage
  7. Repairs and Soldering
    1. Burnout, torch, techniques, and safety procedures
    2. Matrixes and foils
    3. Fluxes
    4. Solder flow
    5. Basic repairs for fixed dental restorations

Effective Term:
Full Academic Year 2017/18

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