Course Title: Construct cast alloy removable partial denture framework

Part A: Course Overview

Program: C5373 Diploma of Dental Technology

Course Title: Construct cast alloy removable partial denture framework

Portfolio: SEH Portfolio Office

Nominal Hours: 80

Regardless of the mode of delivery, represent a guide to the relative teaching time and student effort required to successfully achieve a particular competency/module. This may include not only scheduled classes or workplace visits but also the amount of effort required to undertake, evaluate and complete all assessment requirements, including any non-classroom activities.

Course Code

Campus

Career

School

Learning Mode

Teaching Period(s)

DENT5868C

City Campus

TAFE

174T School of VE Engineering, Health & Science

Face-to-Face or Internet or Workplace

Term1 2017

Course Contact: Matthew Clayton

Course Contact Phone: +61 3 9341 1417

Course Contact Email: matthew.clayton@rmit.edu.au



Course Description

This unit of competency describes the skills and knowledge required to construct burnout patterns for cast metal framework and to devest, trim, treat, finish and evaluate alloy structures.

This unit applies to work in dental technology.

Pre-requisite Courses and Assumed Knowledge and Capabilities

Not applicable



National Competency Codes and Titles

National Element Code & Title:

HLTDET008 Construct cast alloy removable partial denture framework

Elements:

1. Prepare master model

2. Construct refractory model

3. Wax and invest removable partial denture framework

4. Burnout and cast removable partial denture framework

5. Devest, trim, finish and evaluate alloy structures for removable partial denture


Learning Outcomes

On completion of this course, you should be able to:

  1. Prepare master model

 

1.1 Read and interpret the work order

1.2 Confirm the survey of model that has been carried out by the operator

1.3 Transfer design to master model

1.4 Block out undesirable undercuts

1.5 Create clasp ledges

1.6 Scribe food lines

1.7 Apply tissue relief

1.8 Apply saddle relief

 

  1. Construct refractory model

 

2.1 Duplicate master model in refractory material to produce an accurate copy of the model

2.2 Construct sprue former as necessary

2.3 Prepare the refractory model appropriately and apply an appropriate hardener or sealant

 

  1. Wax and invest removable partial denture framework

 

3.1 Transfer design outline correctly to the refractory model

3.2 Select appropriate wax and pre-formed components

3.3 Wax up patterns to the refractory cast consistent with the design

3.4 Sprue the pattern using material of the correct size and in the correct shape and position for the material being cast, and attach it to the investment former

3.5 Select appropriate investment and technique according to the alloy

3.6 Prepare investment materials in accordance with manufacturers’ instructions

3.7 Treat the surface of the wax, patterns and sprues

3.8 Allow for investment setting time in accordance with manufacturer’s instructions

 

  1. Burnout and cast removable partial denture framework

 

4.1 Select appropriate alloy according to work order

4.2 Select burnout and preheat cycles for appropriate investment and alloy combination

4.3 Burnout wax from investment mould and hold at recommended temperature for casting

4.4 Melt alloy and cast using appropriate materials, equipment and techniques

 

  1. Devest, trim, finish and evaluate alloy structures for removable partial denture

 

5.1 Select and apply cooling cycle

5.2 Remove the cast alloy structure from the investment without damaging the integrity of the structure

5.3 Remove oxides using an appropriate abrasive or chemical treatment

5.4 Visually examine the cast alloy structure and correctly identify any casting faults and assess the viability of the casting

5.5 Remove sprues and trim and shape the alloy structure

5.6 Treat the surface of the alloy using appropriate materials and equipment, and finish using appropriate abrasives and polishes

5.7 Position the cast on the master model and check accuracy of major connection and clasps, and adjust any metal occlusal contacts with antagonist

5.8 Decontaminate the denture framework according to infection control guidelines

5.9 Dry the denture framework, replace on model and place in a sealed container for dispatch


Overview of Assessment

Before the critical aspects of evidence are considered all prerequisites must be met.

 

 

Assessment

Assessment: Task 1

Practical assessment, read and correctly interpret work orders, fabricate appliances

Assessment: Task 2

Practical assessment, critically evaluate practical work to meet technical laboratory and clinician requirements

Assessment: Task 3

Theory assessment, written exam

 

Assessment Mapping Matrix

 

Elements/Performance Criteria Covered

Ass1

Ass 2

Ass 3

1.1

x

x

x

1.2

x

x

x

1.3

x

x

x

1.4

x

x

x

1.5

x

x

x

1.6

x

x

x

1.7

x

x

x

1.8

x

x

x

2.1

x

x

x

2.2

x

x

x

2.3

x

x

x

3.1

x

x

x

3.2

x

x

x

3.3

x

x

x

3.4

x

x

x

3.5

x

x

x

3.6

x

x

x

3.7

x

x

x

3.8

x

x

x

4.1

x

x

x

4.2

x

x

x

4.3

x

x

x

4.4

x

x

x

5.1

x

x

x

5.2

x

x

x

5.3

x

x

x

5.4

x

x

x

5.5

x

x

x

5.6

x

x

x

5.7

x

x

x

5.8

x

x

x

5.9

x

x

x

 

To be deemed competent you must demonstrate an understanding of all aspects required of the competency. Assessment methods have been