Course Title: Construct thermoformed bases and appliances

Part B: Course Detail

Teaching Period: Term1 2014

Course Code: DENT5785C

Course Title: Construct thermoformed bases and appliances

School: 155T Vocational Health and Sciences

Campus: City Campus

Program: C5312 - Diploma of Dental Technology

Course Contact: Mark Doherty

Course Contact Phone: 03 9341 1407

Course Contact Email:

Name and Contact Details of All Other Relevant Staff

Narelle Tobin

03 9341 1411


Zanne Frazer

 03 9341 1402


James Moser

03 9341 1417

Nominal Hours: 20

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

HLTDT301D Construct models
HLTDT302D Construct custom impression trays
HLTDT304D Articulate models and transfer records
HLTIN301C Comply with infection control policies and procedures
HLTWHS200A Participate in WHS processes

Course Description

This unit of competency describes the skills and knowledge you require to construct thermoformed bases and appliances such as mouthguards - used for a range of sports and bleaching trays - for cosmetic enhancements of patients. You will also cover a broader range of appliances in the theory content of the unit to give you an understanding of the different applications of thermoformed material in the Dental industry.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:

HLTDT315D Construct thermoformed bases and appliances


1. Prepare model

Performance Criteria:

1.1 Interpret prescription

1.2 Mark outline and scribe finishing lines where applicable

1.3 Apply block-out material as required


2. Thermo-form appliance or base from blank

Performance Criteria:

2.1 Select thermo-forming material in accordance with the prescription and appliance to be constructed

2.2 Select thermo-forming equipment according to material

2.3 Apply heat to material to ensure that blank has been uniformly softened

2.4 Adapt softened material to cast ensuring adaptation is uniform with constant thickness as specified by manufacturer

2.5 Allow material to cool

2.6 Verify adaptation


3. Trim, shape and finish appliances or bases

Performance Criteria:

3.1 Remove thermo-formed blank

3.2 Trim to outline and fit to model

3.3 Refine outline

3.4 Smooth and finish appliance or base

Learning Outcomes

On completion of this course you will be able to demonstrate, on a consistent basis, the process involved in the construction of thermoformed bases and appliances used in the Dental industry.

Details of Learning Activities

Participation in group activities based on a simulated workplace exercises.
Practical exercises
Individual exercises carrying out requirements of competency.

Teaching Schedule


HLTDT315D Construct thermoformed baseplates and appliances (0900 -1230 - 3.5 hours) Date to be advised


Practical: Various sessions delivered dependent on the group.

Learning Resources

Prescribed Texts

Anatomy of Orofacial Structures


Mosby's Dental Dictionary



Other Resources

RMIT online learning Hub
Internet links
Primal Pictures
Journals, Brochures, Pamphlets, Newspapers, Magazines

Overview of Assessment

You will be assessed in a simulated workplace and under the normal range of work conditions.

You will be assessed on both the essential knowledge and the demonstration of essential skills through;

  1. Completion of practical exercises - including detailed self-reflection or each exercise
  2. Practical exam
  3. Theory exam

Assessment Tasks

Practical assessment:

Complete dentate mouthguard
Assessment guidelines for the practical competency, as outlined in the practical exercise book.

Theoretical examination:

Construct thermoformed baseplates and appliances

One element of the 3 hour exam (divided into competencies) PASS MARK 60%, If ’NYC’ (Not Yet Competent) result is achieved the student will be provided with detailed feedback of the shortcomings

The student will NOT be granted an opportunity to sit a secondary exam and the student will be required to re-enroll in the unit which will be incurr fees.


Assessment Matrix

Other Information

Please Note: Students may apply for Special Consideration as (per the information provided in the Student Handbook ) via the RMIT Hub @ http:/ consideration if they believe their ability to complete Assessment for this Unit by the submission date has been affected by factors beyond their control. Special Consideration must be lodged prior to or within 48 hours of the scheduled assessment time or assessment submission date.

The application for Special Consideration is NOT granted automatically on application.

Students are required to support the learning outcomes this Unit with work based experience and/ or further self managed research to support positive outcomes in this Unit.

To undertake practical exercises and /or assessment students MUST present for the assessment process as follows:

Please note these are also WH&S requirements for clinical safety.

In appropriate practical class attire (Protective clothing for legs - if shorts, must cover knees, lab coat, safety glasses)
Fully covered in leather(not suede) footwear

Hair to be contained by tying back or in appropriate hair cover.
No artificial fingernails to be worn
The wearing of henna is acceptable.
Short, clean fingernails
No jewellery to be worn on the hands or wrists. Wedding rings or jewellery that cannot be removed for cultural reasons must be taped with an appropriate waterproof tape
All cuts/ skin abrasions on the hands or wrists must be covered with a waterproof dressing

A student that is non-compliant with any of the above requirements will not be permitted to undertake practical exercises or assessment at the scheduled time. The student will be rescheduled to undertake assessment at a later date.

Course Overview: Access Course Overview