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Evidence Guide: HLTDT302D - Construct custom impression trays

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

 

HLTDT302D - Construct custom impression trays

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

Prepare model

  1. Read and interpret the prescription
  2. Block out undesirable undercuts
  3. Design the custom tray for the client's dentition and the intended impression material and technique
  4. Apply spacer material as required
Read and interpret the prescription

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Block out undesirable undercuts

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Design the custom tray for the client's dentition and the intended impression material and technique

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply spacer material as required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select and prepare materials

  1. Select custom tray materials in accordance with the prescription
  2. Prepare equipment for processing
  3. Provide appropriate mixing vessels and templates if required
Select custom tray materials in accordance with the prescription

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare equipment for processing

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Provide appropriate mixing vessels and templates if required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Construct custom impression tray

  1. Apply appropriate separating medium in accordance with manufacturer's instructions
  2. Mix or manipulate materials in accordance with the manufacturer's instructions
  3. Adapt tray material to the model to the pre-determined peripheral outline
  4. Construct handle and finger rests and attach according to operator requirements
  5. Process custom tray using the correct method for the correct material
  6. Separate the tray from the cast in a manner that prevents damage and remove spacer material
  7. Trim the outline of the tray to shape
Apply appropriate separating medium in accordance with manufacturer's instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Mix or manipulate materials in accordance with the manufacturer's instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Adapt tray material to the model to the pre-determined peripheral outline

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Construct handle and finger rests and attach according to operator requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Process custom tray using the correct method for the correct material

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Separate the tray from the cast in a manner that prevents damage and remove spacer material

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Trim the outline of the tray to shape

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Finish custom impression tray

  1. Smooth and refine the peripheries, handle and other surfaces of the tray
  2. Decontaminate the custom impression tray according to infection control guidelines
  3. Dry the custom tray and place in a sealed container for dispatch
Smooth and refine the peripheries, handle and other surfaces of the tray

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Decontaminate the custom impression tray according to infection control guidelines

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Dry the custom tray and place in a sealed container for dispatch

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria, Required Skills and Knowledge, the Range Statement and the Assessment Guidelines for this Training Package.

Critical aspects for assessment and evidence required to demonstrate this competency unit:

Consistency of performance should be demonstrated over the required range of workplace situations

The individual being assessed must provide evidence of specified essential knowledge as well as skills

Context of and specific resources for assessment:

Assessment should replicate workplace conditions as far as possible

Where, for reasons of safety, access to equipment and resources and space, assessment takes place away from the workplace, simulations should be used to represent workplace conditions as closely as possible

Method of assessment

Evidence of essential knowledge and understanding may be provided by:

traditional or online (computer-based) assessment

written assignments/projects

Case study and scenario as a basis for discussion of issues and strategies to contribute to best practice

Questioning

Staff and/or client feedback

Supporting statement of supervisor

Authenticated evidence of relevant work experience and/or formal/informal learning

Role play/simulation

Access and equity considerations:

All workers in the health industry should be aware of access and equity issues in relation to their own area of work

All workers should develop their ability to work in a culturally diverse environment

In recognition of particular health issues facing Aboriginal and Torres Strait Islander communities, workers should be aware of cultural, historical and current issues impacting on health of Aboriginal and Torres Strait Islander people

Assessors and trainers must take into account relevant access and equity issues, in particular relating to factors impacting on health of Aboriginal and/or Torres Strait Islander clients and communities

Required Skills and Knowledge

This describes the essential skills and knowledge and their level required for this unit.

Essential knowledge:

The candidate must be able to demonstrate essential knowledge required to effectively do the task outlined in elements and performance criteria of this unit, manage the task and manage contingencies in the context of the identified work role

This includes knowledge of:

Applied oral anatomy:

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

Infection control guidelines for the decontamination of completed laboratory work

Properties of custom tray materials including:

acrylic resins

light-cured composite

shellac

thermoplastic

Rationale for using space filling materials

The 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

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

Essential skills:

It is critical that the candidate demonstrate the ability to

Consistently prepare a range of custom tray materials

Consistently fabricate a range of custom trays that are clean, free of debris and conform to the prescription

Consistently comply with current infection control guidelines, Australian Standards and legislative requirements as they relate to the dental technician's specific job role

Consistently comply with work health and safety (WHS) policies and procedures as they relate to the dental technician's specific job role

In addition, the candidate must be able to effectively do the task outlined in elements and performance criteria of this unit, manage the task and manage contingencies in the context of the identified work role

This includes the ability to:

Consistently follow safe work practices and apply standard precautions during the construction of custom impression trays

Consistently follow work health and safety (WHS) policies and procedures

Consistently read and interpret the prescription card correctly

Consistently follow sequenced written instructions and manufacturer specifications for the preparation of materials

Consistently use visible light cured techniques

Consistently use thermo-forming technology

Critically evaluate all work produced so as to consistently meet both the technical requirements of the laboratory and client requirements

Select procedures to prepare a range of custom trays

Use appropriate practices to ensure efficient use of power and other resources

Use literacy skills to read and follow directions, policies and procedures including:

laboratory policies and procedures

material safety data sheets

Range Statement

The Range Statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance.

Removable prostheses may include but are not limited to:

Complete dentures

Partial dentures

Custom tray materialsmay include:

Shellac

Acrylic resins

Thermoplastic

Light-cured composite