Course Title: Construct custom impression trays

Part B: Course Detail

Teaching Period: VE 2021

Class Number: All

Class Section: All

For flexible terms and optional semesters, a Part B course guide may have been published for the entire teaching period, or for the specific class number in which you are enrolled. If there is no Part B course guide published for your specific class number, please refer to the guide for the teaching period in which you are enrolled. Enrolment Online is the definitive source for details regarding your class enrolment.

Course Code: DENT5862C

Course Title: Construct custom impression trays

School: 174T School of VE Engineering, Health & Science

Campus: City Campus

Program: C5387 - Diploma of Dental Technology

Course Contact: Sue Fatone

Course Contact Phone: +61 3 9341 1406

Course Contact Email:

Name and Contact Details of All Other Relevant Staff

Nominal Hours: 30

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


Course Description

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

This unit applies to work in dental technology.

National Codes, Titles, Elements and Performance Criteria

National Element Code & Title:

HLTDET002 Construct custom impression trays


1. Prepare model

Performance Criteria:

1.1 Read and interpret the work order

1.2 Block out undesirable undercuts

1.3 Design the custom tray for the patient’s dentition and the intended impression material and technique

1.4 Apply spacer material when required


2. Select and prepare materials

Performance Criteria:

2.1 Select custom tray materials in accordance with the work order

2.2 Prepare equipment for processing

2.3 Provide appropriate mixing vessels and templates when required


3. Construct custom impression trays

Performance Criteria:

3.1 Apply appropriate separating medium in accordance with manufacturer’s instructions

3.2 Mix or manipulate materials in accordance with the manufacturers’ instructions

3.3 Adapt tray material to the model to the pre-determined peripheral outline

3.4 Construct handle 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 model in a manner that prevents damage and remove spacer material

3.7 Trim the outline of the tray to shape


4. Finish custom impression trays

Performance Criteria:

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 course, you will be able to:

  1. Prepare model 
  1. Select and prepare materials 
  1. Construct custom impression tray 
  1. Finish custom impression tray 

Details of Learning Activities

Theory: Online theory - "Canvas Collaborate"

Practical: Dental Laboratory exercises/activities

Teaching Schedule

Construct custom impression trays 01 of 4- Introduction, Theory.
Construct custom impression trays 02 of 4 - Practical demonstrations, practical exercises, review and discuss relevant theory.
Construct custom impression trays 03 of 4 - Practical demonstrations, practical exercises, review and discuss relevant theory.
Construct custom impression trays 04 of 4 - Practical Assessment Session 1 (of 1).

Learning Resources

Prescribed Texts


Other Resources

Overview of Assessment

You must show evidence of the ability to complete tasks outlined in elements and performance criteria of this unit, manage tasks and manage contingencies in the context of the job role. There must be evidence that you have:

• read and correctly interpreted 4 work orders

• used standard precautions and safe work practices to fabricate custom trays, using a range of materials, for 4 different dentitions with desirable properties and design features including one each of the following (must be a combination of maxillary and mandibular arches):

   - full dentition

   - edentulous

   - partial dentition including

        o bounded saddle

        o free end saddle

• critically evaluated the 4 custom impression trays produced to meet technical laboratory and clinician requirements.

To be deemed competent you must demonstrate an understanding of all aspects required of the competency.   

Regular attendance is necessary. 

Assessment methods have been designed to measure your achievement of each competency in a flexible manner over multiple tasks and consist of theory and practical based tasks.

Assessment Tasks

Students enrolled in Vocational Education and Training qualifications are assessed for Competency.  To be assessed as Competent means you have consistently demonstrated the required knowledge and skills at a standard expected in the workplace.

To be assessed as Competent in this course you will need to complete each assessment task to a satisfactory standard.  You will receive feedback from the teacher at the conclusion of each assessment task.

You should refer to the assessment brief which is available through Canvas for full assessment criteria.


Assessment Task 1: Knowledge Assessment, submission date: Monday 31/05/2021.  The theory assessment will include short answer questions and diagrams as required.

Assessment Task 2: Practical Assessment, due Wednesday 26/05/2021.  During your practical assessment you will be required to construct and critically evaluate 4 custom trays that cover a range of factors including full dentition, edentulous and partial dentition (including bounded saddle areas and free end saddle areas) to a standard suitable for insertion in the mouth.


Final results that apply to courses that are delivered and assessed in accordance with competency-based assessment are:

CA: Competency Achieved

NYC: Not Yet Competent

DNS: Did not Submit for Assessment

Assessment Matrix

The assessment tasks listed in this course guide address all the elements and criteria of the requirements of this course.

Other Information


Your learning experience will involve class-based teaching, discussion, demonstration and practical exercises  

It is strongly advised that you attend all timetabled sessions. This will allow you to engage in the required learning activities, ensuring you the maximum opportunity to complete this course successfully. 


Information about your studies: 

You can access My Studies through the RMIT website for information about timetables, important dates, assessment dates, results and progress, Canvas etc. 



Information on assessment including Special consideration, Adjustments to assessment, (eg. applying for an extension of time): 


Academic Integrity and Plagiarism:  

RMIT University has a strict policy on plagiarism and academic integrity. Please refer to the website for more information on this policy. 


Credit Transfer and Recognition of Prior Learning:  

Credit transfer is the recognition of previously completed formal learning (an officially accredited qualification). 

Recognition of Prior Learning (RPL) is an assessment process that allows you to demonstrate competence using the skills you have gained through experience in the workplace, voluntary work, informal or formal training or other life experiences.   

Please speak to your teacher if you wish to discuss applying for Credit Transfer or RPL for the unit(s) of competency addressed in this course. 

Course Overview: Access Course Overview