Course Title: Construct models

Part B: Course Detail

Teaching Period: Term1 2015

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


Gypsum Products, Tooth Morphology

Contact: Zanne Frazer (Gypsum Products), Nicholas Greer (Tooth Morphology)

P: Zanne - 9341 1402, Nicholas - 9314 1420


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 from Anatomy of Orofacial Structures
  • Written assessment

Teaching Schedule

The delivery of;

  • Gypsum Products on Wednesday February 4
  • Tooth Morphology session 1 of 2 on Tuesday February 10
  • Tooth Morphology session 2 of 2 on Tuesday February 12
  • is scheduled for the APPRENTICE group (DT1) & NON-APPRENTICE groups (FT1A & FT1B) in the Lecture theatre of Building 154 RMIT (within the Royal Dental Hospital Melbourne) Notification will be provided via student email if the date or location change.

Following the delivery of the theory class, practical exercises will be undertaken in the laboratory.

Class schedules are detailed in the timetables provided on Blackboard (subject to change at the discretion of RMIT, in this event notification will be provided to your student email);

  1. FT1A - Monday, Tuesday, Wednesday
  2. FT1B - Monday, Thursday, Friday
  3. DT1 - Monday - Friday (2week block)

Practical classes will be delivered in the simulated environment at RMIT where the Teacher will provide demonstration and assistance as you construct the following appliances.

  • Mx & Md Primary Casts
  • Accutrac Model Preparation
  • Mx & Md Secondary Casts
  • Mx & Md Dentate Study Casts

The TIER 2 exercises are made available if you complete all of the previous exercises and are seeking further practice prior to the assessments. The time guides for the TIER 2 exercises are reduced and require a ’self-managed approach’ to complete the exercise.

  • TIER 2 - Mx & Md Primary Casts
  • TIER 2 - Mx & Md Secondary Casts
  • TIER 2 - Accutrac Model Preparation

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/DENT5781C 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

You will attempt the following practical exercise under supervision of the teacher and you will be graded with either a Px (Satisfactory) or NYC (Not Satisfactory) according to the assessment guidelines outlined in the practical exercise book; in accordance with the training package elements & essential skills.

  1. Mx & Md Primary Casts
  2. Accutrac Model Preparation
  3. Mx & Md Secondary Casts
  4. Mx & Md Dentate Study Casts

The TIER 2 exercises are made available if you complete all of the previous exercises and are seeking further practice prior to the assessments. The time guides for the TIER 2 exercises are reduced and require a ’self-managed approach’ to complete the exercise. If you attempt the following practical exercises you will be graded with either a Px (Satisfactory) or NYC (Not Satisfactory) according to the assessment guidelines outlined in the practical exercise book; in accordance with the training package elements & essential skills.

  1. TIER 2 - Mx & Md Primary Casts
  2. TIER 2 - Mx & Md Secondary Casts
  3. TIER 2 - Accutrac Model Preparation

Upon completion of an exercise and prior to submission for assessment, all exercises undertaken in the practical classes will require you to provide a detailed reflection of your own work focussing on areas of the appliance that were successful as well as areas that could be improved upon next time.

The practical exam will take place under supervision in the simulated working environment at RMIT. The exam will take place under exam conditions and you will be given details of the requirements and assessment guidelines in the practical book available in class and on BlackBoard.

PRAC EXAM - Mx & Md primary casts

The theory exam will be conducted under supervision at RMIT under exam conditions.

Gypsum Products - Theoretical examination - pass mark 60%

Tooth Morphology - Theoretical examination - pass mark 60%

Assessment Matrix

To achieve a grade of CA (Competency Achieved) for the unit HLTDT301D/DENT5781C Construct models, you are required to obtain a pass result (PX or CA) for the following theoretical and practical assessments that are used to measure; elements, performance criteria, essential knowledge and essential skills as outlined in the health training package.

  1. Gypsum Products - Theoretical examination
  2. Tooth Morphology - Theoretical examination
  3. PRAC EXAM - Mx & Md primary casts

Failure to complete any of the above listed tasks/assessments will result in an NYC not yet competent result for unit HLTDT301D/DENT5781C 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.

The scheduled dates for the assessments are as follows;

  1. Non-Apprentice FT1A & FT1B: (The assessment process must be finalised and a result entered by July 1st 2015)
  • Gypsum products - Monday March 25th
  • Tooth morphology - Monday May 18th

      2.    Apprentice DT1: Wednesday September 2nd (The assessment process must be finalised and a result entered by July 1st 2015) 

  •  Gypsum products - Wednesday May 13th
  • Tooth morphology - Thursday May 14th

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:;ID=z7247xjmh46z

Special consideration online application - RMIT University:;ID=g43abm17hc9w

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/DENT5781C 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.


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