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Evidence Guide: HLTDET009 - Construct crown and bridge structures

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

 

HLTDET009 - Construct crown and bridge structures

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

Elements define the essential outcomes

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare crown and bridge model

  1. Pour or construct model using crown and bridge model system
  2. Prepare crown and bridge model to appropriate height and with level occlusal plane in accordance with crown and bridge model system used
  3. Section crown and bridge model in accordance with work order requirements
  4. Prepare die for construction of restoration in accordance with work order
Pour or construct model using crown and bridge model system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare crown and bridge model to appropriate height and with level occlusal plane in accordance with crown and bridge model system used

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Section crown and bridge model in accordance with work order requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare die for construction of restoration in accordance with work order

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Wax and invest fixed partial dentures and structures

  1. Wax up crown and bridge restorations
  2. Sprue crown and bridge wax pattern and prepare for processing
  3. Select appropriate investment material according to the material to be used
  4. Prepare investment materials according to the manufacturers’ instructions
  5. Invest wax patterns
Wax up crown and bridge restorations

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Sprue crown and bridge wax pattern and prepare for processing

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select appropriate investment material according to the material to be used

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare investment materials according to the manufacturers’ instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Invest wax patterns

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Burnout, process and finish fixed partial dentures and structures

  1. Select burnout techniques appropriate to the investment material and restoration material
  2. Process restoration/substructure in appropriate material
  3. Devest restoration/substructure without damaging it
  4. Check for defects
  5. Trim and finish restoration while maintaining all contact areas and margins
  6. Evaluate the finished restoration
  7. Decontaminate the restoration according to infection control guidelines
  8. Dry the casting, replace on model and place in a sealed container for dispatch
Select burnout techniques appropriate to the investment material and restoration material

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Process restoration/substructure in appropriate material

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Devest restoration/substructure without damaging it

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Check for defects

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Trim and finish restoration while maintaining all contact areas and margins

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Evaluate the finished restoration

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Decontaminate the restoration according to infection control guidelines

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Dry the casting, replace on model and place in a sealed container for dispatch

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. Prepare crown and bridge model

1.1 Pour or construct model using crown and bridge model system

1.2 Prepare crown and bridge model to appropriate height and with level occlusal plane in accordance with crown and bridge model system used

1.3 Section crown and bridge model in accordance with work order requirements

1.4 Prepare die for construction of restoration in accordance with work order

2. Wax and invest fixed partial dentures and structures

2.1 Wax up crown and bridge restorations

2.2 Sprue crown and bridge wax pattern and prepare for processing

2.3 Select appropriate investment material according to the material to be used

2.4 Prepare investment materials according to the manufacturers’ instructions

2.5 Invest wax patterns

3. Burnout, process and finish fixed partial dentures and structures

3.1 Select burnout techniques appropriate to the investment material and restoration material

3.2 Process restoration/substructure in appropriate material

3.3 Devest restoration/substructure without damaging it

3.4 Check for defects

3.5 Trim and finish restoration while maintaining all contact areas and margins

3.6 Evaluate the finished restoration

3.7 Decontaminate the restoration according to infection control guidelines

3.8 Dry the casting, replace on model and place in a sealed container for dispatch

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. Prepare crown and bridge model

1.1 Pour or construct model using crown and bridge model system

1.2 Prepare crown and bridge model to appropriate height and with level occlusal plane in accordance with crown and bridge model system used

1.3 Section crown and bridge model in accordance with work order requirements

1.4 Prepare die for construction of restoration in accordance with work order

2. Wax and invest fixed partial dentures and structures

2.1 Wax up crown and bridge restorations

2.2 Sprue crown and bridge wax pattern and prepare for processing

2.3 Select appropriate investment material according to the material to be used

2.4 Prepare investment materials according to the manufacturers’ instructions

2.5 Invest wax patterns

3. Burnout, process and finish fixed partial dentures and structures

3.1 Select burnout techniques appropriate to the investment material and restoration material

3.2 Process restoration/substructure in appropriate material

3.3 Devest restoration/substructure without damaging it

3.4 Check for defects

3.5 Trim and finish restoration while maintaining all contact areas and margins

3.6 Evaluate the finished restoration

3.7 Decontaminate the restoration according to infection control guidelines

3.8 Dry the casting, replace on model 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:

used standard precautions and safe work practices to design and construct 1 maxillary or mandibular anterior and posterior crown

critically evaluated the 1 maxillary or mandibular anterior and posterior crown produced to meet technical laboratory and patient 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 and State/Territory legislation 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 related to crown and bridge structures

- teeth form and function

- tooth preparation including basic cementation techniques of restorations

- articulation and occlusion

• casting

• dental metallurgy

• factors responsible for casting defects

• finishing and polishing

• fundamentals of crown and bridge impressions including:

- properties

- types

- techniques

- compatibility with crown and bridge model materials

• properties of model and die materials including:

- epoxy and polymer materials

- gypsum materials

- manipulation of crown and bridge model materials

• properties of crown and bridge materials:

- casting and pressing materials

- computer-aided design (CAD) and computer-aided manufacturing (CAM)

- ceramic bonding materials

- other relevant materials

• use of pattern materials including:

- wax and plastic pattern techniques

- emerging technology techniques

• investment and burnout including:

- fundamental knowledge of investment materials

- investing and expansion of the investment

- burnout

- waxing and spruing techniques.