Course Title: Construct custom impression trays

Part B: Course Detail

Teaching Period: Term1 2011

Course Code: DENT5194C

Course Title: Construct custom impression trays

School: 155T Vocational Health and Sciences

Campus: City Campus

Program: C5206 - Diploma of Dental Technology

Course Contact: Mark Doherty

Course Contact Phone: +61 3 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: 15

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

Pre-requisites for this unit include:
• HLTIN301A Comply with infection control policies and procedures in health work
• HLTOHS200A Participate in OHS processes in the health industry

Course Description

This unit of competency describes the skills and knowledge required to construct special trays to accurately record oral tissues
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:

HLTDT302B Construct custom impression trays


1. Prepare model

2. Select and prepare materials

3. Construct custom impression tray

4. Finish custom impression tray

Performance Criteria:

The Performance Criteria specify the level of performance required to demonstrate achievement of the Element. Terms in italics are elaborated in the Range Statement.
1.1 Read and interpret the prescription
1.2 Block out undesirable undercuts
1.3 Design the custom tray for the client’s dentition and the intended impression material and technique
1.4 Apply spacer material as required

2.1 Select custom tray materials in accordance with the prescription
2.2 Prepare equipment for processing
2.3 Provide appropriate mixing vessels and templates if required

3.1 Apply appropriate separating medium in accordance with manufacturer’s instructions
3.2 Mix or manipulate materials in accordance with the manufacturer’s instructions
3.3 Adapt tray material to the model to the pre-determined peripheral outline
3.4 Construct handle and finger rests and attach according to operator requirements
3.5 Process custom tray using the correct method for the correct material
3.6 Separate the tray from the cast in a manner that prevents damage and remove spacer material
3.7 Trim the outline of the tray to shape

4.1 Smooth and refine the peripheries, handle and other surfaces of the tray
4.2 Decontaminate the custom impression tray according to infection control guidelines
4.3 Dry the custom tray and place in a sealed container for dispatch

Learning Outcomes

On completion of this competency the student will have the ability consistently follow safe work practices and apply standard precautions during the construction of custom impression trays.

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 over two sessions, as follows:
• Theory: Session time; four hours (approx)
• Theory review: Session time; one hour (approx)

Learning Resources

Prescribed Texts

Anatomy of Orofacial Structures


Mosby's Dental Dictionary



Other Resources

Overview of Assessment

Practical exercises, presentation of practical competency assessments and theoretical exams 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, 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

A theoretical exam in conjunction with Models and Dies(HLTDT301B) (Models, Dies & Trays)(PASS MARK 60%)

All forms of assessments and co-assessed units are to be competently passed to pass this unit.

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

Assessment Matrix

Weighting of the assessment tasks:

* Practical competency - 50%
* Theoretical exam - 40%
* Reflection on practical activities - 10%

Course Overview: Access Course Overview