Course Title: Construct cast metal alloy removable partial denture framework

Part B: Course Detail

Teaching Period: Term1 2011

Course Code: DENT5200C

Course Title: Construct cast metal alloy removable partial denture framework

School: 155T Vocational Health and Sciences

Campus: City Campus

Program: C5206 - Diploma of Dental Technology

Course Contact: Mark Doherty

Course Contact Phone: +61 93411407

Course Contact Email:

Name and Contact Details of All Other Relevant Staff

Simon Pearse: Ph - 9341 1411
Fax - 93411401
Email –

Zanne Frazer: Ph - 9341 1402
Fax - 9341 1401
Email –

Nicholas Greer: Ph - 9341 1420
Fax - 93411401
Email –

James Moser: Ph – 9341 1417
Fax - 9341 1401
Email –

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.

Pre-requisites and Co-requisites

• HLTIN301B Comply with infection control policies
and procedures
• HLTDT301B Construct models
• HLTDT302B Construct custom impression trays
• HLTDT303B Construct registration rims
• HLTDT304B Articulate models and transfer records
• HLTDT519A Construct simple complete removable
acrylic dentures and appliances

Course Description

This unit of competency describes the skills and
knowledge required to construct burn-out patterns for
cast metal framework; and devest, trim, treat, finish and
evaluate alloy structures
All procedures are carried out in accordance with
occupational health and safety policies and procedures,
current infection control guidelines, Australian and New
Zealand Standards, State/Territory legislative
requirements and organisation policy

National Codes, Titles, Elements and Performance Criteria

National Element Code & Title:

HLTDT509B Construct cast metal alloy removable partial denture framework


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 metallic structures
for removable partial

Performance Criteria:

1.1 Read and interpret the prescription
1.2 Select alloy
1.3 Confirm the survey of model that has been carried
out by the operator
1.4 Transfer design to master model
1.5 Block out undesirable undercuts
1.6 Create clasp ledges
1.7 Scribe food lines
1.8 Apply tissue relief
1.9 Apply saddle relief

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

3.1 Transfer design outline correctly to the refractory
3.2 Select appropriate wax and pre-formed
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
3.5 Select appropriate investment and technique
according to the alloy
3.6 Prepare investment material in accordance with
manufacturer’s 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

4.1 Select burn out and preheat cycles for appropriate
investment/alloy combination
4.2 Burn-out wax from investment mould and hold at
recommended temperature for casting
4.3 Melt alloy and cast using appropriate materials,
equipment and technique

5.1 Select and apply cooling cycle
5.2 Remove the cast alloy structure
from the investment without
damaging the integrity of the
5.3 Remove oxides using an
appropriate abrasive or chemical
5.4 Visually examine the cast alloy
structure, 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

Learning Outcomes

On completion of this course the participants will be able to demonstrate, on a consistent basis, the process involved in the construction of cast metal alloy removable partial denture framework

Details of Learning Activities

Participation in group activities based on a simulated workplace exercises.
Practical exercises
Individual exercises carrying out requirements of competency.
Student experiences in workplace “on job training”

Teaching Schedule

• Delivered as follows: 
Metallurgy THEORY: Session time; four hours (approx)
Metallurgy THEORY REVIEW: Session time; one hour (approx)

Cast Metal Dentures (Co/Cr): THEORY: Session time; four hours (approx)
Cast Metal Dentures (Co/Cr) THEORY REVIEW: Session time; one hour (approx)

Learning Resources

Prescribed Texts

Anatomy of Orofacal Structures


Mosby's Dental Dictionary



Other Resources

Overview of Assessment

This unit is to be assessed in a simulated workplace and under the normal range of work conditions.
Practical exercises, presentation of competency assessment exercises & written tests are used.

Assessment Tasks

The assessments in this unit are undertaken in a simulated workplace and under the normal range of work conditions in the form of practical exercises, a practical competency and theoretical exams (PASS MARK 50%) all of which are to be
co-assessed with the following units;
HLTIN301A: Comply with Infection Control,
HLTOHS300A: Contribute to OHS Processes,
BSBCMN302A: Organise Personal Work Priorities,
BSBCMN305A: Organise Workplace Information
All forms of assessments and co-assessed units are to be passed to pass this unit.

Assessment Matrix

Weighting of the assessment tasks:

* Practical competency - 50%
* Theoretical exams - 50%

Course Overview: Access Course Overview