Portland Community College | Portland, Oregon

Course Number:
DT 204
Course Title:
Dental Technology Lab IV
Credit Hours:
6
Lecture Hours:
0
Lecture/Lab Hours:
0
Lab Hours:
180
Special Fee:
$45.00

Course Description

Provides an opportunity to develop skills in the processes and procedures associated with dental crown and bridge construction. Includes dental inlays processes and procedures. Audit available.

Addendum to Course Description

Specialty practical cases will be included with routine laboratory projects.

Intended Outcomes for the course

Upon completion of the course students should be able to:

  1. Produce finished metal castings for inlays, crowns and bridges, and frameworks for resin veneer applications.
  2. Demonstrate adaptation and problem solving techniques to solve problems in occlusion, tooth shape, alignment, and periodontal conditions on specialty practical cases.
  3. Use learned skills to build a professional relationship with dentists as partners within healthcare teams.

Outcome Assessment Strategies

1. Weekly waxing quizzes on specialty practical cases.
2. Completion of lab projects on specialty practical cases.
3. Students will also be assessed on speed and efficiency and lab safety compliance using specialty practical cases.
4. Attendance

Course Content (Themes, Concepts, Issues and Skills)

1. Interocclusal relationships
2. Model pouring
3. Crown waxups
4. Investing
5. Bumout procedures
6. Casting and finishing procedures
7. Framework design and construction for veneered crowns/bridges
8. Efficiency in movement, space management and time management.

Related Instruction

Computation
Hours: 10

1. Produce finished metal castings for inlays, crowns and bridges, and frameworks for resinveneer applications.

2. Demonstrate adaptation and problem solving techniques to solve problems in occlusion, tooth shape, alignment, and periodontal conditions on specialty practical cases.

  • Demo ratios for mixing different gypsum materials
  • Demo techniques of weighing different gypsum materials
  • Students pour working models and study models in gypsum
  • Direct Instruction on:
  • Measurements of cusp tip placement, line angles, axial contours while fabricating wax patterns
  • Wax pattern design and construction
  • Students design and fabricate wax patterns, using proper measurements, line angles and contours
  • Ratios of gypsum investments to compensate for alloy expansion / shrinkage during lost wax technique
  • Techniques of mixing gypsum investments
  • Students invest various wax patterns using proper ratios & materials
  • Ratios of wax pattern to casting alloy materiala
  • Technique of measuring wax pattern mass, than calculate quantity of alloy required for casting.
  • Students measure wax patterns and calculate alloy required for casting
  • Measurement of occlusal contacts, proximal contacts, crown thickness while finishing crowns

Communication
Hours: 9

 1. Produce finished metal castings for inlays, crowns and bridges, and frameworks for resinveneer applications.

2. Demonstrate adaptation and problem solving techniques to solve problems in occlusion, tooth shape, alignment, and periodontal conditions on specialty practical cases.

Student discuss and responds to instructor questions relating to;

  • Utilizing previously presented dental communications information Students participate in:
  • Discuss/demo techniques of weighing & mixing of gypsum materials
  • Student questions
  • Instructor query of students
  • Student practice and follow-up questions
  • Discuss measurements of line angles, axial contours, and occlusal and proximal clearances
  • Discuss/demo wax pattern design and construction
  • Student practice and initial follow-up question
  • Discuss ratios of gypsum investments
  • Discuss/demo techniques of mixing investments, Hygro-bath, Bench set techniques
  • Student practice and follow-up questions
  • Discuss ratios of wax patterns to casting alloy
  • Discuss/demo techniques of determining wax pattern mass and calculating alloy requirements
  • Student practice and follow-up questions
  • Discuss measurements of occlusal contacts, proximal contacts, and crown thickness while finishing castings
  • Discuss/demo metal crown fitting finishing and polishing procedures
  • Student practice and initial follow-up questions

Human Relations
Hours: 21

1. Produce finished metal castings for inlays, crowns and bridges, and frameworks for resinveneer applications.

2. Demonstrate adaptation and problem solving techniques to solve problems in occlusion, tooth shape, alignment, and periodontal conditions on specialty practical cases.

3. Use learned skills to build trust with dentist as partners as healthcare teams.

  • Student/student discussions of crown contours, comparing perceptions
  • Interaction among students in general area during working model pouring, wax pattern investing and casting
  • Student interaction during wax pattern construction
  • Interaction instructor /student and student/student during wax pattern construction, investing patterns and finishing crowns
  • Students/Instructor discussions during wax pattern and finished metal crown pre-grade
  • Student and instructor discuss ethics and importance of trust within the industry.
  • Discussion relating to cases send to the Lab for processing and uniqueness of each individual case.
  • Interacting with dentist regarding individual cases and developing a path forward.