Unit of competency Outline
Date retreived
23/07/2026 10:05 AM AWST
23/07/2026 10:05 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.
Take an impression for study models
Take an impression for study models
Unit of competency
National Code
HLTDA415B
HLTDA415B
State Code
D5860
D5860
TGA Status
Replaced
Replaced
DTWD Status
Replaced
Replaced
State Implementation and Classification
Approved Date
02/08/2011
Field of Education
060799 - Dental Studies, N.e.c.
Original Release Date
02/08/2011
Nominal Hours
20
Description
DescriptorThis unit of competency describes the skills and knowledge required to take an accurate impression of the teeth and their supporting structures for the construction of study modelsAll 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. Assess the client
- 1.1 Confirm client's medical history
- 1.2 Provide full details of the procedure to the client and/or carer
- 1.3 Obtain and document consent following ethical and legal requirements
- 1.4 Select the equipment and instruments for the impression
- 1.5 Prepare personal protective equipment for the client and members of the dental team
2. Select impression tray and modify if required
- 2.1 Select an appropriate impression tray for the client
- 2.2 Check the tray for size and modify the impression tray where necessary to ensure accuracy and comfort
- 2.3 Position the client in the dental chair for the procedure
- 2.4 Instruct client on participation during the procedure
3. Prepare alginate impression material
- 3.1 Select impression material in accordance with desired outcome
- 3.2 Mix the impression material to the correct consistency and quantity required
4. Perform impression taking procedure
- 4.1 Implement standard precautions during impression taking.
- 4.2 Use triplex syringe to remove saliva from the occlusal surfaces
- 4.3 Load tray with an appropriate amount of alginate and seat the tray from the back using gentle pressure
- 4.4 Carry-out muscle trimming after seating the impression
- 4.5 Monitor and reassure the client throughout the procedure
- 4.6 Remove the impression when set
- 4.7 Examine the client's mouth for injury and impression material debris following removal of the impression
- 4.8 Restore the client's comfort and appearance
5. Assess the impression
- 5.1 Assess the quality of the impression for the required study model
- 5.2 Identify common impression taking problems
- 5.3 Document details of the procedure in accordance with standard procedures and relevant guidelines
6. Decontaminate the impression
- 6.1 Wear gloves, mask, protective glasses and protective clothing
- 6.2 Rinse the impression or denture in cold running tap water to remove all traces of saliva and blood
- 6.3 Clean the impression in a diluted detergent solution
- 6.4 Rinse the impression until all visible contamination is removed
- 6.5 Place in a sealed container for transport to the laboratory
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. Add any essential operating conditions that may be present with training and assessment depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts.
Equipment and instruments may include:
Examination mirrors
Mixing bowl
Spatula
Stock impression tray
Storage container for transportation
Wax
Personal protective equipment may include:
Examination gloves that comply with AS/NZS 4011 and surgical gloves that comply with AS/NZS 4179
Footwear to protect from dropped sharps and other contaminated items
Glasses, goggles or face-shields
Gowns and waterproof aprons that comply with AS 3789.2 and AS 3789.3
Guidelines for latex allergic clients and staff.
Surgical face masks that comply with AS 4381
Impression procedures may include:
Primary impressions
Impressions for:
study models
protective mouthguard
Impression trays may include but are not limited to:
Custom impression trays
Stock impression trays
Standard precautions must include:
Appropriate reprocessing and storage of reusable instruments
Personal hygiene practices especially washing and drying hands before and after client contact
Safe disposal of clinical waste
Surface cleaning and management of blood and body fluid spills
Techniques to limit contamination
Use of personal protective equipment
Common problems may include:
Bubbles on occlusal surfaces caused by the presence of saliva
Lack of labial sulcus extension
Nausea
Voids from inadequate material
The Range Statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Add any essential operating conditions that may be present with training and assessment depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts.
Equipment and instruments may include:
Examination mirrors
Mixing bowl
Spatula
Stock impression tray
Storage container for transportation
Wax
Personal protective equipment may include:
Examination gloves that comply with AS/NZS 4011 and surgical gloves that comply with AS/NZS 4179
Footwear to protect from dropped sharps and other contaminated items
Glasses, goggles or face-shields
Gowns and waterproof aprons that comply with AS 3789.2 and AS 3789.3
Guidelines for latex allergic clients and staff.
Surgical face masks that comply with AS 4381
Impression procedures may include:
Primary impressions
Impressions for:
study models
protective mouthguard
Impression trays may include but are not limited to:
Custom impression trays
Stock impression trays
Standard precautions must include:
Appropriate reprocessing and storage of reusable instruments
Personal hygiene practices especially washing and drying hands before and after client contact
Safe disposal of clinical waste
Surface cleaning and management of blood and body fluid spills
Techniques to limit contamination
Use of personal protective equipment
Common problems may include:
Bubbles on occlusal surfaces caused by the presence of saliva
Lack of labial sulcus extension
Nausea
Voids from inadequate material
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
Observation of workplace performance is essential for assessment of this unit
Consistent compliance with infection control guidelines, Australian and New Zealand Standards and legislative requirements
Consistency of performance should be demonstrated over the required range of workplace situations
Context of and specific resources for assessment:
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
questions during workplace assessment
written assignments/projects
Case study and scenario as a basis for discussion of issues and strategies to contribute to best practice
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
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
Observation of workplace performance is essential for assessment of this unit
Consistent compliance with infection control guidelines, Australian and New Zealand Standards and legislative requirements
Consistency of performance should be demonstrated over the required range of workplace situations
Context of and specific resources for assessment:
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
questions during workplace assessment
written assignments/projects
Case study and scenario as a basis for discussion of issues and strategies to contribute to best practice
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
Replaced By
| State Code | National Code | Title | Type |
|---|---|---|---|
| AWA42 | HLTDEN012 | Take an impression for study models | Unit of competency |
| State Code | National Code | Title | Type |
|---|---|---|---|
| J092 | HLT43012 | Certificate IV in Dental Assisting | Qualification |