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Elements and Performance Criteria

  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 denture
  6. Visually examine the cast alloy structure, correctly identify any casting faults and assess the viability of the casting

Required Skills

This describes the essential skills and knowledge and their level required for this unit

Essential knowledge

The candidate must be able to demonstrate essential knowledge required to effectively do the task outlined in elements and performance criteria of this unit manage the task and manage contingencies in the context of the identified work role

This includes knowledge of

Applied oral anatomy

dentition arrangement of the teeth naming and coding of teeth

structures of the oral cavity hard and soft palate lateral and posterior borders of the oral cavity tongue and floor of the mouth

teeth form and function

Dental alloys

Heat treatment

Infection control guidelines for the decontamination of completed laboratory work

Melting and casting

WHS and material safety data sheets

Relevant material science for carrying out procedures

Solidification

Surface finishing

Essential skills

It is critical that the candidate demonstrate the ability to

Consistently design and manufacture burnout patterns for simple cast metal frameworks

Consistently devest trim shape and evaluate cast alloy denture framework

Consistently comply with current infection control guidelines Australian Standards and legislative requirements as they relate to the dental technicians specific job role

Consistently comply with work health and safety WHS policies and procedures as they relate to the dental technicians specific job role

In addition the candidate must be able to effectively do the task outlined in elements and performance criteria of this unit manage the task and manage contingencies in the context of the identified work role

This includes the ability to

Consistently follow work health and safety WHS policies and procedures

Consistently follow sequenced written instructions and manufacturer specifications for the preparation of materials

Critically evaluate all work produced so as to consistently meet both the technical requirements of the laboratory and client requirements

Select materials and techniques to manufacture cast metal alloy removable partial denture framework

Use appropriate practices to ensure efficient use of power and other resources

Use safe work practices to minimise the risk of transmission of infection including

consistently following the procedure for washing and drying hands

consistently limiting contamination

consistently maintaining clean receiving and work areas

consistently putting into practice clean techniques

consistently using personal protective equipment

Use literacy skills to read and follow directions policies and procedures including

infection control policies and procedures

laboratory policies and procedures

material safety data sheets

work health and safety WHS policies and procedures

Evidence Required

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 computerbased assessment

written assignmentsprojects

Case study and scenario as a basis for discussion of issues and strategies to contribute to best practice

Questioning

Staff andor client feedback

Supporting statement of supervisor

Authenticated evidence of relevant work experience andor formalinformal learning

Role playsimulation

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 andor Torres Strait Islander clients and communities

Related units

This unit should be assessed in conjunction with the following related competency unit

HLTDTC Construct removable acrylic partial dentures

HLTDT508C Construct removable acrylic partial dentures


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