Teeth Whitening Patient Assessment & Candidacy 2 — Questions and Answers
Question 1: Which shade guide system is most commonly used in clinical practice to assess tooth color before and after whitening?
- Munsell color system
- VITA Classical shade guide (Correct answer)
- CIE Lab color system
- NBS color reference system
Correct answer: VITA Classical shade guide
The VITA Classical shade guide is the most widely adopted tool in dentistry for documenting and communicating tooth shade before and after whitening treatment.
Question 2: A patient has white spot lesions (hypocalcification) on their teeth. How does whitening typically affect these areas initially?
- Whitening permanently eliminates white spot lesions
- White spots may temporarily appear more pronounced as surrounding enamel lightens (Correct answer)
- Whitening has no effect on hypocalcification lesions
- White spot lesions always darken during whitening treatment
Correct answer: White spots may temporarily appear more pronounced as surrounding enamel lightens
White spot lesions often become more visible immediately after whitening because the surrounding enamel lightens faster, though the contrast may diminish over time.
Question 3: Which patient is the BEST candidate for custom at-home whitening trays?
- A patient with severe tetracycline staining from childhood
- A patient with multiple composite fillings on front teeth
- A patient with mild extrinsic staining and no anterior restorations (Correct answer)
- A patient with active caries on multiple teeth
Correct answer: A patient with mild extrinsic staining and no anterior restorations
A patient with mild extrinsic staining and no anterior restorations presents the simplest case, with good expected results and no color-mismatch concerns.
Question 4: What is the primary purpose of taking pre-treatment clinical photographs during patient assessment?
- They are required by insurance companies for whitening reimbursement
- To document baseline tooth shade and provide before-and-after comparison (Correct answer)
- To identify carious lesions that X-rays may have missed
- To evaluate the degree of gum recession
Correct answer: To document baseline tooth shade and provide before-and-after comparison
Pre-treatment photographs establish a documented baseline shade for tracking progress and provide objective before-and-after evidence for both the patient and clinical records.
Question 5: Which factor in a patient's history most significantly influences the expected whitening outcome?
- The patient's age
- The patient's biological sex
- The etiology (cause) of the tooth discoloration (Correct answer)
- The patient's overall systemic health status
Correct answer: The etiology (cause) of the tooth discoloration
The underlying cause of discoloration is the strongest predictor of whitening success, as intrinsic stains from medications or trauma respond very differently than extrinsic surface stains.
Question 6: A patient reports taking tetracycline antibiotics during childhood. What should the clinician explain about whitening expectations?
- Tetracycline stains respond quickly and completely to standard whitening protocols
- Whitening will have absolutely no effect on tetracycline stains
- Whitening may provide some improvement but results are often limited and require extended treatment (Correct answer)
- Tetracycline-stained teeth must be extracted before whitening can be considered
Correct answer: Whitening may provide some improvement but results are often limited and require extended treatment
Tetracycline staining is intrinsic and deeply incorporated into dentin during tooth development, making it resistant to whitening; modest improvement may occur with prolonged treatment.
Question 7: A comprehensive pre-whitening oral examination must include evaluation of which of the following?
- Only visible surface staining on enamel
- Caries, periodontal disease, exposed root surfaces, and cracked teeth (Correct answer)
- Only the patient's saliva pH levels
- Exclusively the anterior teeth that will be visibly whitened
Correct answer: Caries, periodontal disease, exposed root surfaces, and cracked teeth
A thorough exam must check for caries, gum disease, exposed roots, and cracked teeth, as whitening agents can aggravate all of these conditions.
Teeth Whitening Patient Assessment & Candidacy 2
Which shade guide system is most commonly used in clinical practice to assess tooth color before and after whitening?