CCE Preliminary & Diagnostic Work Up 4 — Questions and Answers
Question 1: What is the purpose of a phonetic evaluation during the preliminary diagnostic work-up for anterior ceramic restorations?
- To assess the patient's psychological readiness for treatment
- To determine proper incisal edge position by observing tooth display during 'F,' 'V,' and 'S' sounds (Correct answer)
- To measure vertical dimension using a phonetic ruler
- To identify patients who need speech therapy before treatment
Correct answer: To determine proper incisal edge position by observing tooth display during 'F,' 'V,' and 'S' sounds
Phonetic analysis helps confirm that the planned incisal edge length and position will allow proper articulation of fricative sounds without interference.
Question 2: During the diagnostic work-up, a ceramist reviews the patient's smile photographs and notes excessive gingival display. This finding primarily influences:
- The number of ceramic units to be fabricated
- Whether crown lengthening or gingival recontouring is needed before restorations are placed (Correct answer)
- The firing temperature of the ceramic
- The choice between zirconia and lithium disilicate
Correct answer: Whether crown lengthening or gingival recontouring is needed before restorations are placed
Excessive gingival display may indicate that surgical or laser crown lengthening is necessary to expose adequate tooth structure and create harmonious gingival contours before ceramics are placed.
Question 3: Which of the following is an important consideration when reviewing periapical radiographs during pre-ceramic diagnostic evaluation?
- The radiograph brand used by the dental office
- Root length, bone levels, and periapical pathology that could compromise restoration longevity (Correct answer)
- Whether the patient has had previous orthodontic treatment
- The kVp settings used during exposure
Correct answer: Root length, bone levels, and periapical pathology that could compromise restoration longevity
Periapical radiographs reveal root length, bone support, and any periapical pathology that must be resolved before investing in ceramic restorations.
Question 4: In a diagnostic work-up, the ceramist receives casts that have been mounted in maximum intercuspation (MIP) rather than centric relation (CR). The primary limitation of this mounting is:
- The casts cannot be used for shade selection
- MIP may not represent the most stable condylar position, potentially leading to occlusal discrepancies in the final restorations (Correct answer)
- The articulator will not accept MIP-mounted casts
- Wax-up material adheres poorly to MIP-mounted casts
Correct answer: MIP may not represent the most stable condylar position, potentially leading to occlusal discrepancies in the final restorations
Mounting in MIP captures the habitual bite position, which may differ from centric relation, potentially masking CR-MIP discrepancies that affect occlusal design.
Question 5: When evaluating a patient for ceramic anterior restorations, what does the 'E' test determine?
- Enamel thickness using transillumination
- The amount of incisal tooth display at rest by asking the patient to say 'E' (Correct answer)
- Erosion depth using an explorer probe
- The electrolyte content of saliva
Correct answer: The amount of incisal tooth display at rest by asking the patient to say 'E'
Asking the patient to say 'E' reveals how much of the upper and lower anterior teeth are exposed at rest, informing incisal length and display decisions.
Question 6: Before beginning a diagnostic wax-up for a patient with a Kennedy Class I removable partial denture, the ceramist should consider:
- Whether the patient prefers acrylic or porcelain denture teeth
- How the planned ceramic restorations will interact with the RPD framework rests and clasps (Correct answer)
- The age of the existing RPD
- Whether the patient's insurance covers ceramic restorations
Correct answer: How the planned ceramic restorations will interact with the RPD framework rests and clasps
Ceramic restorations must be designed with rest seats and clasp paths in mind to ensure the RPD continues to function correctly alongside the new ceramics.
Question 7: A ceramist receives a case with no written prescription or shade map. The best course of action is to:
- Proceed with fabrication using a default shade of A2
- Contact the restorative dentist to obtain complete case documentation before starting any work (Correct answer)
- Use the opposing cast shade as a guide
- Begin wax-up and request shade information later
Correct answer: Contact the restorative dentist to obtain complete case documentation before starting any work
Fabricating restorations without adequate documentation risks errors in shade, contour, and occlusion; the ceramist must request complete information from the dentist before proceeding.
CCE Preliminary & Diagnostic Work Up 4
What is the purpose of a phonetic evaluation during the preliminary diagnostic work-up for anterior ceramic restorations?