Course Title: Construct models

Part B: Course Detail

Teaching Period: Term1 2014

Course Code: DENT5781C

Course Title: Construct models

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


  1. Tooth Morphology
  2. Construct Orthodontic Study Models

Contact: Nicholas Greer

P: 9341 1420



  1. Models, Dies and Trays (Delivered and Assessed in conjunction with HLTDT302D Construct Custom Impression Trays)
  2. Gypsum Products and Composite Resins

Contact: Zanne Frazer

P: 9341 1402


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

HLTIN301C Comply with infection control policies and procedures
HLTWHS200A Participate in WHS processes

Course Description

This unit of competency describes the skills and knowledge required for you to construct a range of models from a impressions and moulds of patients upper and lower jaws. The models you construct will be used as the foundation for various dental appliances, such as; special trays, mouthguards, full dentures, partial dentures, crown and bridge, cobalt chrome frameworks . All procedures are carried out in accordance with work health and safety (WHS) 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:

HLTDT301D Construct models


1. Verify integrity of impressions

Performance Criteria:

1.1 Apply standard precautions when receiving, handling and working on dental materials
1.2 Decontaminate impressions according to infection control guidelines
1.3 Examine impressions for defects
1.4 Check impressions to ensure they meet the specifications of the work order
1.5 Handle impressions with care to avoid damage or distortion
1.6 Ensure accompanying models are intact with no defects or adjustments
1.7 Prepare a range of impressions for pouring


2. Select and prepare model materials

Performance Criteria:

2.1 Select appropriate model materials
2.2 Ensure all equipment used for mixing materials is clean
2.3 Prepare model materials in accordance with desired outcomes
2.4 Maintain and store model materials in accordance with manufacturer's instructions


3. Pour impressions

Performance Criteria:

3.1 Pour model materials into impressions in accordance with accepted techniques
3.2 Allow required setting time


4. Finish model

Performance Criteria:

4.1 Separate an intact model from the impression
4.2 Inspect the model for defects
4.3 Trim the model in accordance with requirements
4.4 Duplicate the master cast to create a working model where required by prescription

Learning Outcomes

On completion of this course you will be able to demonstrate, on a consistent basis, the process involved in constructing models from impressions and silicone moulds of patients upper and lower jaws for use as a foundation for various dental appliances to be constructed upon.

Details of Learning Activities

  • Facilitator led discussions using Powerpoint presentations
  • In class activities
  • Simulated laboratory activities
  • Reading chapters form Anatomy of Orofacial Structures and answering questions
  • Written assessment
  • Online quizzes

Teaching Schedule


  1. Tooth Morphology (session 1) (Nicholas Greer)
  2. Gypsum Products and Composite Resins (Zanne Frazer)
  3. Tooth Morphology (session 2) (Nicholas Greer)
  4. Models, Dies and Trays (Zanne Frazer)
  5. Orthodontic Study models (group 1) (Nicholas Greer)
  6. Orthodontic Study models(group 2) (Nicholas Greer)
  7. Gypsum experiments (group 1) (Zanne Frazer)
  8. Gypsum experiments (group 2) (Zanne Frazer)


  1. Gypsum Products and Composite Resins (Zanne Frazer)
  2. Models, Dies and Trays (Zanne Frazer)
  3. Tooth Morphology (session 1) (Nicholas Greer)
  4. Tooth Morphology (session 2) (Nicholas Greer)
  5. Orthodontic Study models (Nicholas Greer)
  6. Gypsum experiments (Zanne Frazer)

Practical sessions:

  1. Primary Mx & Md casts
  2. Secondary Mx & Md casts
  3. Accutrac model preperation
  4. Mx & Md orthodontic study models
  5. TIER 2 - Primary Mx & Md casts
  6. TIER 2 - Secondary Mx & Md casts

Learning Resources

Prescribed Texts

Anatomy of Orofacial Structures


Mosby's Dental Dictionary



Other Resources

  • Powepoint available on MYRMIT Blackboard under the program code C5312 and the Unit of Competence HLTDT301D Construct Models.
  • RMIT online learning Hub
  • Library
  • 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 of each exercise
  2. Practical exam
  3. Theory exam 

Assessment Tasks

Practical exercises and practical exams - PX/CA or NYC

  1. Primary Mx & Md casts
  2. Secondary Mx & Md casts
  3. Accutrac model preperation
  4. Mx & Md orthodontic study models
  5. TIER 2 - Primary Mx & Md casts
  6. TIER 2 - Secondary Mx & Md casts
  7. PRAC EXAM - Dentate Primary Mx & Md casts

Assessment guidelines for the practical exercises and exams are outlined in the practical exercise book.

Theoretical examination - pass mark 60%

  1. Gypsum Products exam
  2. Models, Dies and Trays exam
  3. Construct Orthodontic Study Models (incorporated into the Models Dies and Trays exam)
  4. Tooth Morphology exam

Assignment - CA or NYC
Tooth Carvings (self asessed following a template/ students to assess others using same template) Self assessment confirmed by Nicholas Greer and grade given dependent on accuracy of self assessment.

Assessment Matrix

CA (Competency Achieved) for the unit HLTDT301D Construct Models is as follows:

Pass result (PX or CA) for the following theoretical and practical assessments

  1. Gypsum Products exam
  2. Models, Dies and Trays exam
  3. Construct Orthodontic Study Models (incorporated into the Models Dies and Trays exam)
  4. Tooth Morphology exam
  5. Tooth Carvings assignment
  6. PRAC EXAM - Dentate Primary Mx & Md casts

Failure to complete any of the above listed tasks/assessments will result in an NYC not yet competent result for unit HLTDT301D Construct Models. An NYC (not yet competent) result will be entered in the student record.This will result in non-completion of this unit of competence requiring re-enrolment incurring fees and a return to class work and completion of any relevant assessments at the time of the re-enrolment.

Other Information


RMIT University requires that you present YOUR work for assessment. Plagiarism is a form of cheating. It is the presentation of the work or idea of another person. Plagiarism is NOT acceptable. Penalities can include charges of acedemic misconduct, cancellation of results and exclusion from your course.

Please note: It is also a disciplinary offence to allow your work to be plagiarised by another student. When signing the coversheet to submit your learning guides and assessments.

Special consideration:

Please note: Students may apply for Special Consideration as per the information via the RMIT website if they believe 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 assesment time or assessment submission date. The application for Special Consideration is NOT granted automatically on application.

RMIT assessment policies - RMIT University

Special consideration online application - RMIT University:

Non completion or non-submission of compulsory tasks:

Failure to complete any or all of the compulsory tasks listed above will prevent the student from achieving a CA (competency achieved) result for unit HLTDT301D Construct Models. This will result in the student not completing the unit successfully. NYC (not yet competent) will be recorded and re enrolment will be required to continue the unit/program. Fees will be incurred. Please note: A second opportunity for assessment will not be granted unless the student has applied for and been granted special consideration as per RMIT assessment policy.

Assessment Appeal Process:
The Appeals Against Assessment policy and procedure applies to all coursework programs in all careers. The appeal process is staged and students are required to follow each stage in order to ensure their full entitlement to appeal is available

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