Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

HLTDET002 Mapping and Delivery Guide
Construct custom impression trays

Version 1.0
Issue Date: April 2024


Qualification -
Unit of Competency HLTDET002 - Construct custom impression trays
Description
Employability Skills
Learning Outcomes and Application 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.The skills in this unit must be applied in accordance with Commonwealth and State/Territory legislation, Australian/New Zealand Standards and industry codes of practice.
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.

Skills must have been demonstrated in a dental laboratory workplace or in a simulated dental laboratory environment that reflects workplace laboratory conditions. The following conditions must be met for this unit:

• use of suitable facilities, equipment and resources including:

- access to work order

- Dental Board of Australia guidelines on infection control on which the candidate bases the planning process

- laboratory safety manuals and procedures in line with relevant Commonwealth and State/Territory legislation

- WHS policies on which the candidate bases the planning process.

Assessors must satisfy the Standards for Registered Training Organisations (RTOs) 2015/AQTF mandatory competency requirements for assessors.
Prerequisites/co-requisites
Competency Field
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Elements define the essential outcomes
       
Element: Prepare model
  • Read and interpret the work order
  • Block out undesirable undercuts
  • Design the custom tray for the patient’s dentition and the intended impression material and technique
  • Apply spacer material when required
       
Element: Select and prepare materials
  • Select custom tray materials in accordance with the work order
  • Prepare equipment for processing
  • Provide appropriate mixing vessels and templates when required
       
Element: Construct custom impression tray
  • Apply appropriate separating medium in accordance with manufacturer’s instructions
  • Mix or manipulate materials in accordance with the manufacturers’ instructions
  • Adapt tray material to the model to the pre-determined peripheral outline
  • Construct handle and attach according to operator requirements
  • Process custom tray using the correct method for the correct material
  • Separate the tray from the model in a manner that prevents damage and remove spacer material
  • Trim the outline of the tray to shape
       
Element: Finish custom impression tray
  • Smooth and refine the peripheries, handle and other surfaces of the tray
  • Decontaminate the custom impression tray according to infection control guidelines
  • Dry the custom tray and place in a sealed container for dispatch
       


Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

ELEMENT

PERFORMANCE CRITERIA

Elements define the essential outcomes

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

1. Prepare model

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

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 tray

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 tray

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

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:

• 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.

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, current Dental Board of Australia guidelines on infection control, Commonwealth and State/Territory legislation requirements and organisation policies relating to dental laboratory work

• 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 custom tray materials including:

- acrylic resins

- light-cured composite

• rationale for using space filling materials

• desirable properties and design features of custom impression trays including:

- a design that holds the impression material in the correct position in the mouth

- a design that supports the lips and cheeks so that the functional depth and shape of the sulcus is recorded

- a design that allows for positioning of the handle to avoid the lip during impression taking

- rigidity, strength, dimensional stability and smoothness

- spacing to permit the correct thickness of the impression material to be used.

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

ELEMENT

PERFORMANCE CRITERIA

Elements define the essential outcomes

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

1. Prepare model

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

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 tray

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 tray

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

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
 
Read and interpret the work order 
Block out undesirable undercuts 
Design the custom tray for the patient’s dentition and the intended impression material and technique 
Apply spacer material when required 
Select custom tray materials in accordance with the work order 
Prepare equipment for processing 
Provide appropriate mixing vessels and templates when required 
Apply appropriate separating medium in accordance with manufacturer’s instructions 
Mix or manipulate materials in accordance with the manufacturers’ instructions 
Adapt tray material to the model to the pre-determined peripheral outline 
Construct handle and attach according to operator requirements 
Process custom tray using the correct method for the correct material 
Separate the tray from the model in a manner that prevents damage and remove spacer material 
Trim the outline of the tray to shape 
Smooth and refine the peripheries, handle and other surfaces of the tray 
Decontaminate the custom impression tray according to infection control guidelines 
Dry the custom tray and place in a sealed container for dispatch 

Forms

Assessment Cover Sheet

HLTDET002 - Construct custom impression trays
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:

Assessment Record Sheet

HLTDET002 - Construct custom impression trays

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

Date: