Take an impression for study models

Unit of competency Outline

Date retreived
24/07/2026 12:45 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.

Unit of competency

National Code
HLTDEN026

State Code
ODI50

TGA Status
Current

DTWD Status
Approved

Current Release Number
2.00

Current Release Date
02/07/2021

View on TGA

State Implementation and Classification

Approved Date

29/10/2021

Field of Education

060705 - Dental Technology

Original Release Date

29/10/2021

Nominal Hours

Description

This unit of competency describes the performance outcomes, skills and knowledge required to take an accurate impression of teeth and their supporting structures for the construction of study models as prescribed by the dental practitioner.This unit applies to dental assisting work under the instruction and supervision of the dental practitioner.The skills in this unit must be applied in accordance with Commonwealth and State/Territory legislation, Australian standards and industry codes of practice.No occupational licensing, certification or specific legislative requirements apply to this unit at the time of publication.

Notes

Elements and Performance Criteria

1. Assess the patient.

1.1. Confirm patient’s medical history and review with dental practitioner.
1.2. Provide full details of the procedure to patient or carer.
1.3. Obtain and document consent adhering to ethical and legal requirements.
1.4. Select equipment and instruments for the impression.
1.5. Prepare personal protective equipment for patient and members of the dental team.

2. Select appropriate impression tray.

2.1. Check position of the dental chair and patient for the procedure.
2.2. Impression tray for size and modify as required to ensure accuracy and comfort.
2.3. Instruct patient on participation during the procedure.
2.4. Follow infection control procedures during the procedure.

3. Prepare impression material.

3.1. Select impression material in accordance with desired outcome.
3.2. Mix the impression material to correct consistency and quantity required according to manufacturers’ instructions.

4. Perform impression-taking procedure.

4.1. Implement standard precautions during impression-taking.
4.2. Remove saliva from the occlusal surfaces.
4.3. Load tray with an appropriate amount of impression material and seat the tray from the back using gentle pressure.
4.4. Ensure the impression extends to and surrounds dental hard tissue structures.
4.5. Ensure the impression has adequate extension into the buccal sulcus and vestibule.
4.6. Carry out muscle trimming after seating the impression.
4.7. Monitor and reassure the patient throughout the procedure including gag reflex.
4.8. Remove the impression when set.
4.9. Examine patient’s mouth for injury and impression material debris following removal of the impression.
4.10. Restore patient’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 organisational policies.

6. Decontaminate the impression.

6.1. Implement standard precautions during impression-taking.
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 suitable solution.
6.4. Rinse the impression until all visible contamination is removed.
6.5. Identify and correctly label impression and record procedure.

No information

Replaces

State Code	National Code	Title	Type
AWA42	HLTDEN012	Take an impression for study models	Unit of competency

State Code	National Code	Title	Type
BGW8	HLT45021	Certificate IV in Dental Assisting	Qualification