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| Our Stand Practice of Partial Dentures |
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Listing of Standards By Task
1. Disinfect the impression and/or model
2. Evaluate the prescription for completeness
3. Document changes to the prescription
4. Evaluate the impression or model for completeness
5. Create a master model and a duplicate model
6. Fabricate custom trays
7. Set the bite and mount the case on the articulator
8. Survey & design the appliance
9. Block out the undercuts
10. Fabricate a refractory model
11. Transfer the design from the master model to the refractory model and wax-up
12. Sprue the appliance
13. Invest the model into the casting ring
14. Burn-out the wax pattern
15. Cast and de-vest the appliance
16. Trim and fit the appliance to the duplicate model
17. Fabricate saddle(s) for the altered cast
18. Send the appliance to the Health Professional for try- in and/or altered cast and/or bite registration, if needed
19. Fabricate an altered cast model
20. Set-up the teeth and wax- up the tissue
Condition:
Given a shipment of an impression or model from a Health Professional
Task:
Disinfect the impression and/or model
Criteria:
Safety:
...So that gloves are worn at all times until disinfecting is completed
...So that the disinfectant used is compatible with the impression and/or model
...So that manufacturers specifications for the disinfectant used, are followed
...So that the packaging material that was in direct contact with the impression or model, is discarded
...So that the impression and/or model is disinfected according to the UniversalPrecautions -- at the minimum -- low level.
Timing:
...Before proceeding any further
Condition:
Given a prescription from a Health Professional
Task:
Evaluate the prescription for completeness
Criteria:
Technical Quality:
...The prescription must include:
...the patients name or identification number
...the Health Professionals name
...type and/or description of prosthesis or treatment objectives
...materials and teeth to be used
...date sent
...So that if in doubt, the dental technologist will consult the Health Professional before proceeding with the work
Condition:
Given that clarification and/or changes are needed due to an incomplete or unclear prescription from a Health Professional
Task:
Document changes to the prescription
Criteria:
Technical Quality:
...So that any changes or modifications to a prescription or design as a result of discussions with the Health professional, are documented and dated.
...Documentation must include:
...date and time of discussion
...name of contact from the Health Professionals office
...changes and modifications agreed to
...signature of the RDT or that of the person designated by the RDT
Condition:
Given a prescription and impression or model from a Health Professional
Task:
Evaluate the impression or model for completeness
Criteria:
Technical Quality:
...The impression or model must --
...not have any flaws and/or visible distortions that will affect the work to be done
Condition:
Given a complete prescription from a Health Professional, and impressions
Task:
Create a master model and a duplicate model
Criteria:
Technical Quality:
...So that the models displays all anatomical tissue landmarks
...So that the models are clear of voids and have no air bubbles in the technically critical areas
Condition:
Given a complete prescription from a Health Professional, which includes the requirement for a custom tray, and an impression or model
Task:
Fabricate custom trays
Criteria:
Technical Quality:
...So that the custom tray conforms with the anatomical outlines and landmarks provided on the preliminary model
...So that the custom tray provides proper design for the chosen material or impression technique to be used as prescribed
Safety:
...So that materials used are either ADA, CDA, Health Canada or FDA approved
...So that if materials do not have either ADA, CDA, Health Canada or FDA approvals, the RDT must inform the prescribing Health Professional and record the Health Professionals approval and the materials used
Condition:
Given a Health Professionals prescription, a working and opposing model, an articulator, a bite registration and luting material
Task:
Set the bite and mount the case on the articulator
Criteria:
Technical Quality:
...So that the models interdigitate as per patients centric occlusion or as required by the prescription
Condition:
Given an articulated case, a surveyor, hand instruments, and a Health Professionals instructions
Task:
Survey & design the appliance
Criteria:
Technical Quality:
...According to the Health Professionals prescription
...So that the path of insertion of the appliance is manipulated to achieve harmonization with all the abut ment teeth
...So that any potential problems for function, retention or aesthetics are identified
...So that retention is achieved without sacrificing the aesthetics as dictated by the dentist
...So that any potential compromises to the retention and/or aesthetics are approved by the Health Professional
Condition:
Given the designed appliance on the master model, block-out materials and a heat source
Task:
Block-out the undercuts
Criteria:
Technical Quality:
...So that all undercuts that are not part of the design are eliminated
...So that relief and block-out wax is placed in areas as required by the design
Condition:
Given the blocked-out master model, duplicating system, hand instruments and refractory model system
Task:
Fabricate a refractory model
Criteria:
Technical Quality:
...So that the refractory model reproduces the master model accurately
...So that the manufacturers specifications for the materials used are followed
Condition:
Given the master model, refractory model, hand instruments, patterns and wax
Task:
Transfer the design from the master model to the refractory model and wax-up
Criteria:
Technical Quality:
...So that the pattern is applied without being distorted
...So that the wax-up is an exact duplicate of the approved design
Condition:
Given the waxed appliance on the refractory model
Task:
Sprue the appliance
Criteria:
Technical Quality:
...So as to allow for an accurate reproduction of the wax pattern by casting alloy
Condition:
Given the waxed and sprued pattern on a refractory model and casting ring, an investment system and hand instruments
Task:
Invest the model into the casting ring
Criteria:
Technical Quality:
...According to manufacturers specifications
Condition:
Given mold, furnace and crucible
Task:
Burn-out the wax pattern
Criteria:
Technical Quality:
...So that the temperature used and time allowed for burn-out follows alloy manufacturers specifications
Condition:
Given selected alloy for casting and a casting system
Task:
Cast and de-vest the appliance
Criteria:
Technical Quality:
...So that porosity is not present in the restoration
...So that all details of the wax pattern are present in the ...So that all casting, de- vesting and cleaning procedures are followed according
to the instructions of alloy and equipment manufacturers
Safety:
...So that materials used are either ADA, CDA, Health Canada ...So that if materials do not have either ADA, CDA, Health Canada or FDA approvals, the RDT must inform the prescribing Health Professional and record the Health Professionals approval and the materials used
Condition:
Given the de-vested casting, high speed motor, trimming tools, and a polishing system
Task:
Trim and fit the appliance to the duplicate model
Criteria:
Technical Quality:
...So that the rests are completely seated
...So that the damage to the duplicate model is isolated to the retentive areas of the clasp
...So that the external parts of the metal castings are refined to the original wax contours
...So that the appliance has a clean and shiny appearance
...So that the appliance is passive when fully seated
...So that there are no occlusal interferences
Condition:
Given a request from a Health Professional for saddles for an altered cast procedure, and given the appliance fitted on the master model, and processing materials
Task:
Fabricate saddle(s) for the altered cast
Criteria:
Technical Quality:
...So that the saddle(s) conform with the anatomical outlines and landmarks provided on the preliminary model
...So that the saddle(s) provides proper design for the chosen material or impression technique to be used as prescribed
Safety:
...So that materials used are either ADA, CDA, Health Canada or FDA approved
...So that if materials do not have either ADA, CDA, Health Canada or FDA approvals, the RDT must inform the prescribing Health Professional and record the Health Professionals approval and the materials used
Condition:
Given the appliance fitted on the master model and a request for try- in and/or altered cast and/or bite registration as specified in the prescription
Task:
Send the appliance to the Health Professional for try- in and/or altered cast and/or bite registration, if needed
Criteria:
Technical Quality:
...So that the appliance will be received by the Health Professional without damage or visible distortions
Condition:
Given a disinfected cast partial appliance with altered cast impression, a master model, hand instruments, heat source, luting material, and a mixing system
Task:
Fabricate an altered cast model
Criteria:
Technical Quality:
...So that the cast partial rests are seated on the master model
...So that there is no interference between the impression material and the model
...So that the altered addition interlocks with the original model
Condition:
Given the model, appliance, heat source, teeth, wax, hand instruments, trimming tools, and a hand piece and/or lathe
Task:
Set-up the teeth and wax- up the tissue
Criteria:
Technical Quality:
...Following the Health Professionals prescription and/or instructions
...So that the shade of the teeth matches the prescription
...So that the mold is selected in accordance with the manufacturers suggested
criteria
...So that the teeth are set-up to achieve the required
...So that wax-up is done according to anatomical requirements
...So that the aesthetic requirements specified by the Health Professional are met
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