Unit of competency Outline
Date retreived
22/07/2026 7:39 AM AWST
22/07/2026 7:39 AM AWST
Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.
Construct cast metal alloy removable partial denture framework
Construct cast metal alloy removable partial denture framework
Unit of competency
National Code
HLTDT509C
HLTDT509C
State Code
D8187
D8187
TGA Status
Replaced
Replaced
DTWD Status
Replaced
Replaced
State Implementation and Classification
Approved Date
02/08/2011
Field of Education
060705 - Dental Technology
Original Release Date
02/08/2011
Nominal Hours
60
Description
DescriptorThis 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 structuresAll 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
Notes
Elements and Performance Criteria
1. Prepare master model
- 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. 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
3. 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 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. Burnout and cast removable partial denture framework
- 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. Devest, trim, finish and evaluate metallic 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
- 5.4Visually 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
RANGE STATEMENT
The Range Statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance.
Alloys may include:
Cobalt chromium based alloys
Gold alloys
traditional gold alloys
medium and low gold alloys
Titanium alloys
Tissue relief provided to areas of the oral mucosa which may include:
Maxillary and mandibular tori
Palatal areas
Rugae
Tuberosities
Melting/Casting techniques may include:
Arc melting
Centrifugal casting
Flame melting
Gas pressure casting
Induction melting
Resistance melting
Vacuum casting
Visual examination of the cast alloy structure may include:
Confirming that the cast:
is effective
fits the master model
is free of defects
meets the requirements of the planned design
complies with the prescription
is fit for the purpose
Trim and shape the alloy structure may include:
Ensuring that the:
casting has no sharp edges
occlusal contacts with metal are removed
bubbles on the fitting surface are removed prior to fitting
clasps have appropriate form and dimension
connections with soft tissue are appropriately formed
food lines are clearly defined
components are all the correct size and shape
Checking the alloy structure may include but is not limited to:
The accuracy of the casting
The strength of the casting
The integrity of the casting
The surface finish of the casting
The Range Statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance.
Alloys may include:
Cobalt chromium based alloys
Gold alloys
traditional gold alloys
medium and low gold alloys
Titanium alloys
Tissue relief provided to areas of the oral mucosa which may include:
Maxillary and mandibular tori
Palatal areas
Rugae
Tuberosities
Melting/Casting techniques may include:
Arc melting
Centrifugal casting
Flame melting
Gas pressure casting
Induction melting
Resistance melting
Vacuum casting
Visual examination of the cast alloy structure may include:
Confirming that the cast:
is effective
fits the master model
is free of defects
meets the requirements of the planned design
complies with the prescription
is fit for the purpose
Trim and shape the alloy structure may include:
Ensuring that the:
casting has no sharp edges
occlusal contacts with metal are removed
bubbles on the fitting surface are removed prior to fitting
clasps have appropriate form and dimension
connections with soft tissue are appropriately formed
food lines are clearly defined
components are all the correct size and shape
Checking the alloy structure may include but is not limited to:
The accuracy of the casting
The strength of the casting
The integrity of the casting
The surface finish of the casting
EVIDENCE GUIDE
The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria, Required Skills and Knowledge, the Range Statement and the Assessment Guidelines for this Training Package.
Critical aspects for assessment and evidence required to demonstrate this competency unit:
The individual being assessed must provide evidence of specified essential knowledge as well as skills
Consistency of performance should be demonstrated over the required range of workplace situations
Context of and specific resources for assessment:
Assessment should replicate workplace conditions as far as possible
Where, for reasons of safety, access to equipment and resources and space, assessment takes place away from the workplace, simulations should be used to represent workplace conditions as closely as possible
Method of assessment
Evidence of essential knowledge and understanding may be provided by:
traditional or online (computer-based) assessment
written assignments/projects
Case study and scenario as a basis for discussion of issues and strategies to contribute to best practice
Questioning
Staff and/or client feedback
Supporting statement of supervisor
Authenticated evidence of relevant work experience and/or formal/informal learning
Role play/simulation
Access and equity considerations:
All workers in the health industry should be aware of access and equity issues in relation to their own area of work
All workers should develop their ability to work in a culturally diverse environment
In recognition of particular health issues facing Aboriginal and Torres Strait Islander communities, workers should be aware of cultural, historical and current issues impacting on health of Aboriginal and Torres Strait Islander people
Assessors and trainers must take into account relevant access and equity issues, in particular relating to factors impacting on health of Aboriginal and/or Torres Strait Islander clients and communities
Related units:
This unit should be assessed in conjunction with the following related competency unit:
HLTDT508C Construct removable acrylic partial dentures
The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria, Required Skills and Knowledge, the Range Statement and the Assessment Guidelines for this Training Package.
Critical aspects for assessment and evidence required to demonstrate this competency unit:
The individual being assessed must provide evidence of specified essential knowledge as well as skills
Consistency of performance should be demonstrated over the required range of workplace situations
Context of and specific resources for assessment:
Assessment should replicate workplace conditions as far as possible
Where, for reasons of safety, access to equipment and resources and space, assessment takes place away from the workplace, simulations should be used to represent workplace conditions as closely as possible
Method of assessment
Evidence of essential knowledge and understanding may be provided by:
traditional or online (computer-based) assessment
written assignments/projects
Case study and scenario as a basis for discussion of issues and strategies to contribute to best practice
Questioning
Staff and/or client feedback
Supporting statement of supervisor
Authenticated evidence of relevant work experience and/or formal/informal learning
Role play/simulation
Access and equity considerations:
All workers in the health industry should be aware of access and equity issues in relation to their own area of work
All workers should develop their ability to work in a culturally diverse environment
In recognition of particular health issues facing Aboriginal and Torres Strait Islander communities, workers should be aware of cultural, historical and current issues impacting on health of Aboriginal and Torres Strait Islander people
Assessors and trainers must take into account relevant access and equity issues, in particular relating to factors impacting on health of Aboriginal and/or Torres Strait Islander clients and communities
Related units:
This unit should be assessed in conjunction with the following related competency unit:
HLTDT508C Construct removable acrylic partial dentures
Replaces
| State Code | National Code | Title | Type |
|---|---|---|---|
| C5005 | HLTDT9A | Cast metal alloy removable partial denture framework | Unit of competency |
| C9193 | HLTDT509B | Construct cast metal alloy removable partial denture framework | Unit of competency |
Replaced By
| State Code | National Code | Title | Type |
|---|---|---|---|
| WD130 | HLTDT509D | Construct cast metal alloy removeable partial denture framework | Unit of competency |
| State Code | National Code | Title | Type |
|---|---|---|---|
| D089 | HLT50507 | Diploma of Dental Technology | Qualification |