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Evidence Guide: HLTDET001 - Construct models

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

HLTDET001 - Construct models

What evidence can you provide to prove your understanding of each of the following citeria?

Elements define the essential outcomes

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Verify integrity of impressions

  1. Apply standard precautions when receiving, handling and working on dental materials
  2. Decontaminate impressions according to infection control guidelines
  3. Examine impressions for defects
  4. Check impressions to ensure they meet the specifications of the work order
  5. Handle impressions with care to avoid damage or distortion
  6. Ensure accompanying models are intact with no defects or adjustments required
  7. Prepare a range of impressions for pouring
Apply standard precautions when receiving, handling and working on dental materials

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Decontaminate impressions according to infection control guidelines

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Examine impressions for defects

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Check impressions to ensure they meet the specifications of the work order

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Handle impressions with care to avoid damage or distortion

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Ensure accompanying models are intact with no defects or adjustments required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare a range of impressions for pouring

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select and prepare model materials

  1. Select appropriate model materials
  2. Ensure all equipment used for mixing materials is clean
  3. Prepare model materials in accordance with desired outcomes
  4. Maintain and store model materials in accordance with manufacturers’ instructions
Select appropriate model materials

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Ensure all equipment used for mixing materials is clean

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare model materials in accordance with desired outcomes

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Maintain and store model materials in accordance with manufacturers’ instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Pour impressions

  1. Pour model materials into impressions in accordance with accepted techniques
  2. Allow required setting time
Pour model materials into impressions in accordance with accepted techniques

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Allow required setting time

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Finish model

  1. Separate intact model from the impression.
  2. Inspect the model for defects
  3. Trim the model in accordance with requirements
  4. Duplicate the master model to create a working model where required by work order
Separate intact model from the impression.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Inspect the model for defects

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Trim the model in accordance with requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Duplicate the master model to create a working model where required by work order

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

ELEMENT

PERFORMANCE CRITERIA

Elements define the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element.

1. Verify integrity of impressions

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 required

1.7 Prepare a range of impressions for pouring

2. Select and prepare model materials

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 manufacturers’ instructions

3. Pour impressions

3.1 Pour model materials into impressions in accordance with accepted techniques

3.2 Allow required setting time

4. Finish model

4.1 Separate 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 model to create a working model where required by work order

Required Skills and Knowledge

ELEMENT

PERFORMANCE CRITERIA

Elements define the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element.

1. Verify integrity of impressions

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 required

1.7 Prepare a range of impressions for pouring

2. Select and prepare model materials

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 manufacturers’ instructions

3. Pour impressions

3.1 Pour model materials into impressions in accordance with accepted techniques

3.2 Allow required setting time

4. Finish model

4.1 Separate 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 model to create a working model where required by work order

The candidate 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 the candidate has:

• used standard precautions and safe work practices to prepare models, using a range of materials specifically prepared against written instructions and manufacturers’ instructions, for at least 4 different types of impressions (must be a combination of maxillary and mandibular arches):

- dentate

- partially dentate

- edentulous

• critically evaluated the 4 different types of models produced to meet technical laboratory and clinician requirements.

The candidate must be able to demonstrate essential knowledge required to effectively complete tasks outlined in elements and performance criteria of this unit, manage tasks and manage contingencies in the context of the work role. This includes knowledge of:

• Australian/New Zealand Standards, workplace health and safety (WHS) policies, Dental Board of Australia guidelines on infection control, Commonwealth legislation and State/Territory legislation, and organisation policies relating to dental laboratory work

• requirements and organisation policies relating to dental laboratory work including:

- use of standard precautions to minimise risk

- use of personal protective equipment (PPE) including disposable gloves, laboratory coat and eye protection

- decontamination of impressions

- minimising hazardous manual tasks

- requirements for storage of model material

- safe disposal of packaging materials

• fundamental oral anatomy, including:

- dentition – arrangement of the teeth, naming and coding of teeth

- structures of the oral cavity – hard and soft palate, lateral and posterior borders of the oral cavity, tongue and floor of the mouth

- teeth form and function

• properties of elastic impression materials including:

- alginate impression material

- polyether impression material

- polysulphide impression material

- polyvinyl siloxane impression material

• properties of rigid impression materials including:

- impression compound

- zinc oxide-eugenol impression pastes

• desirable properties of model materials including:

- accurate reproduction of all details of the impression

- colour contrast with other materials used on them

- ease of manipulation

- sufficient strength and hardness

- suitability for use with all types of impression materials

• significance of study models for:

- dentate and partially dentate mouths

- edentulous mouths.