Unit 308 Provide Support During The Stages of Prosthetic Treatments Assessment Brief 2026

City & Guilds Level 3 Extended Diploma in Dental Nursing

Unit 308 Assignment Brief

Learning Outcome

The learner will:

1. Know the purpose of fixed prostheses used in dentistry and the equipment, instruments and materials used in their construction.

Assessment Criteria

The learner can:

1.1 Explain the difference between fixed and removable prostheses, and why they are used in dentistry.

1.2 Describe fixed prosthetic treatments available to replace missing teeth.

1.3 Describe why a clinician may choose to carry out a preparation for a permanent restorative fixed prostheses.

1.4 Explain the use of equipment, instruments, burs and materials during the preparation of a permanent restorative fixed prostheses.

1.5 Explain the purpose of a gingival retraction cord.

1.6 Describe the different types and purposes of temporary fixed prostheses.

1.7 Explain the equipment and materials used in the construction of a temporary fixed prostheses.

1.8 Explain the purpose of a temporary luting cement.

1.9 Outline the advice which should be given to a patient with a temporary fixed prostheses.

1.10 Explain the different types of permanent luting cements for cementation of permanent fixed prostheses.

1.11 Describe the equipment, instruments and materials used in the fitting of a permanent fixed prostheses.

1.12 Outline the CAD/CAM process used to produce a fixed prosthesis, including capturing the data and production of the prosthesis.

Range

(AC1.2) Treatments available to replace missing teeth

a) Implants

b) Bridges

i. Conventional retainer / pontic

ii. Adhesive (maryland)

(AC1.3) Permanent restorative fixed prostheses

a) Jacket crown (anterior and posterior)

b) Post crown

c) Veneer

d) Inlay / onlay

(AC1.6, AC1.7) Temporary fixed prostheses

a) Pre-formed temporary crown

b) Chairside-constructed temporary crown

c) Veneer

d) Inlay / onlay

(AC1.10) Permanent fixed prosthesis

a) Crown

b) Veneer

c) Inlay/onlay

d) Bridge

i. Conventional

ii. Adhesive

Learning Outcome

The learner will:

2. Be able to select and prepare equipment, instruments and materials for fixed prostheses.

Assessment Criteria

The learner can:

2.1 Provide the clinician with the patient’s records for the planned treatment.

2.2 Prepare equipment, instruments and materials for preparation of a permanent fixed prosthesis to include fitting and adjustment of the temporary fixed prosthesis.

2.3 Maintain a clear field of operation by applying moisture control and protect soft tissues during the clinical procedure.

2.4 Monitor the patient and provide support to the patient and clinician during the clinical procedure.

Range

(AC2.1) Patient’s records

a) Clinical notes and dental charts

b) Radiographic images

c) Medical history

d) Valid consent

(AC2.2) Equipment

a) Aspirator

b) Hand instruments

c) Shade guide

d) Handpieces

(AC2.2) Materials

e) Temporary crown material

f) Temporary luting cement

g) Permanent adhesive / luting cement

h) Articulating paper

Learning Outcome

The learner will:

3. Know the purpose of removable prostheses used in dentistry and the equipment, instruments and materials used in their construction.

Assessment Criteria

The learner can:

3.1 Describe the types of removable prostheses available:

a) Partial

i. Acrylic

ii. Cobalt-chrome

b) Full

c) Immediate

3.2 Explain the stages and the use of equipment, instruments and materials required when constructing a full acrylic denture.

3.3 Explain how the stages would differ when constructing a partial cobalt-chrome or immediate prosthesis.

3.4 Describe the benefits of a cobalt-chrome partial denture when compared with an acrylic partial denture.

3.5 Explain the additional information the patient will require when an immediate denture is fitted.

Range

(AC3.2) Stages

a) primary impressions

b) secondary impressions

c) bite (occlusal) registration

d) try in

e) retry

f) fit

g) review

(AC3.2) Equipment, instruments and materials

a) Stock impression trays

b) Alginate impression material

c) Shade guide

d) Special trays

e) Elastomer impression material

f) Wax knife

g) Willis bite gauge

h) Le Cron carver

i) Patient mirror

j) Articulating paper

k) Fox’s occlusal plane guide

l) Heat source

m) Wax

n) Acrylic trimming burs

o) Straight handpiece

Learning Outcome

The learner will:

4. Be able to select and prepare the equipment, instruments and materials for removable prostheses.

Assessment Criteria

The learner can:

4.1 Provide the clinician with the patient’s records for the planned treatment.

4.2 Prepare equipment, instruments and materials for a stage in the construction of a removable prosthesis.

4.3 Monitor the patient and provide support to the patient and clinician during the clinical procedure.

Range

(AC4.1) Patient’s records

a) clinical notes and dental charts

b) radiographic images

c) medical history

d) consent

Learning Outcome

The learner will:

5. Understand the materials and equipment used for fixed and removable prostheses.

Assessment Criteria

The learner can:

5.1 Define the terms ‘working arch’ and ‘opposing arch’.

5.2 Explain why different impression materials are used in the fabrication of prostheses.

5.3 Summarise the use of an articulator.

5.4 Explain the purpose of the laboratory prescription for a prosthesis.

5.5 Explain the relevance of the term ‘custom made device’.

5.6 Explain the importance and the process of taking an accurate shade for prostheses.

5.7 Explain the disinfection and storage requirements for impression materials.

Range

(AC5.2, AC5.7) Impression materials

a) Alginate

b) Elastomer

Learning Outcome

The learner will:

6. Be able to select, prepare and mix materials for fixed and removable prostheses.

Assessment Criteria

The learner can:

6.1 Prepare impression materials to the correct ratio, consistency and quantity, within handling and setting times relative to the material.

6.2 Load impression materials on the impression tray.

6.3 Disinfect impressions upon removal from the patient’s mouth and prepare for transportation to the laboratory, in line with current legal guidelines and practice policy.

6.4 Record appropriate and sufficient information on laboratory prescription.

6.5 Hand mix a powder/liquid permanent luting cement to the required consistency expected when fitting a crown.

Range

(AC6.1, AC6.2) Impression materials

a) Alginate

b) Elastomer

Unit 308 Provide support during the stages of prosthetic treatments Supporting Information

Evidence Requirements

Learning Outcomes 1, 3 and 5 – Centres may use professional discussion, assessor devised questions, expert witness testimonies, outcomes of research-based activities, assignments and reflective accounts.

Learning Outcomes 2 and 4 – must be observed as separate procedures.

LO2: one observation* carried out by the assessor to cover one of the below preparations:

One of:

• Crown
• Conventional bridge
• Veneer

LO4: one observation* by the assessor or expert witness to cover one of the removable prosthesis stages below:

One of:

• Primary / secondary impressions
• Bite
• Fit

*The primary method of assessment must be observation. Assessment criteria not sufficiently covered during the observation can be assessed by an appropriate secondary method.

Learning Outcome 6 – Assessment criteria 6.1 – 6.4 may be observed during assessment of outcomes 2 and 4. Any assessment criteria not observed can be assessed by simulation. Assessment criteria 6.5 may be assessed during observations in the workplace by an assessor or expert witness, where this is not possible, then it may be assessed using a simulated activity.

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