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What should be considered when selecting posterior teeth?
Why should the buccolingual dimension of posterior teeth be less than that of natural dentition?
Where should the length of the lower posterior teeth coincide with?
What could happen if teeth are placed improperly on an ascending area?
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What is the critical consideration in the vertical length of lower posterior teeth?
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What is characteristic of the square tapering facial form?
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Which type of tooth profile is appropriate for a flat facial profile?
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For which gender are ovoid or tapered teeth considered appropriate?
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What should the clinician consider when choosing the shade of artificial teeth?
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Where should the actual shade guide tooth be observed?
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What is a common misconception about the selection of tooth shade based on age?
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How should input from relatives factor into the selection of tooth shade?
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What tends to happen to recently extracted teeth when stored improperly?
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What aspects should be considered in the selection of anterior artificial teeth?
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Which method can be used to measure the width of the maxillary anterior teeth?
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What is the relationship between the width of the central incisor and the dimensions of the face?
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How can practitioners estimate the canine-to-canine measurement effectively?
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What is the importance of interpreting the esthetic desires of the patient during tooth selection?
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In terms of size calculations for anterior teeth, what key factor is significant?
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Why is it important for patients to achieve a relaxed position when marking the occlusion rim?
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What role does artistic skill play in the selection of artificial teeth?
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What is the recommended adjustment clinicians should make to the interalar measurement to estimate the width of the six maxillary anterior teeth?
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Which method is used to determine the approximate location of the cuspid eminence?
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What measurement adjustment may be necessary when determining the length of the anterior teeth?
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When pronouncing the letter F, where do the incisal edges of maxillary anterior teeth make contact?
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What relationship exists between the shape of the edentulous upper arch and the shape of the upper incisor teeth?
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How is the classification of face shape determined?
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In which scenario does the face appear tapered?
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Which face shape is indicated by lines that are parallel?
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Study Notes
Anterior Teeth Selection
-
Maxillary Anterior Teeth
-
Size
-
Width:
- Related to bizygomatic width (width of face)
- Measured with caliper or face bow
- Width of 6 anterior teeth estimated using:
- Relaxed corners of mouth (from distal end of one canine to the other)
- Interalar measurement (distance between centers of hamular notches) + 10mm
- Clinicians should add 7mm to interalar measurement for 6 anterior teeth width
- Canine prominences: Locate by drawing lines from ala of nose to corner of mouth, distance between marks represents 6 anterior teeth width
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Length:
- Incisal edges should be 2-3mm below upper lip
- Affected by space between arches
- During speech, incisal edges touch lower lip junction of moist and dry surfaces
- Direct measurement between high lip line and occlusal plane, adding 1-3mm for accuracy
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Width:
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Shape:
- Arch Shape: Direct relationship to shape of upper incisors (ovoid, tapered, or square)
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Facial Shape:
- Two lines running 2.5cm in front of ear tragus towards angle of mandible
- Parallel lines = square face
- Lines converging = tapered face
- Lines diverging = ovoid face
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Sex: Curved features = feminine, square features = masculine
- Female teeth: ovoid or tapered
- Male teeth: square
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Shade (Color):
- Consider:
- Shade of previous dentures
- No specific shade for age groups
- Facial complexion for least conspicuous shade
- Pre-extraction shade determination
- Shade of recently extracted teeth (caution: lightening in shade with drying)
- Patient preferences are crucial
- Multiple shades should be presented for the final decision
- Observe chosen shade in 3 locations: Beside cheek, under upper lip (incisal edge exposed), under upper lip (mouth open, 2/3 exposed)
- Consider:
-
Size
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Mandibular Anterior Teeth:
- Selected to match maxillary anterior teeth in size, shape, and shade
Posterior Teeth Selection
- Selection based on shade, size, number, and form
- Shade should be in harmony with anterior teeth
-
Buccolingual Dimension:
- Should be less than natural dentition to:
- Reduce occluding forces on alveolar ridge during chewing.
- Keep denture in place by favoring cheek and tongue support.
- Reduce buccolingual dimension but not at the expense of cheek support.
- Should be less than natural dentition to:
-
Anteroposterior Dimension:
- Determined by length of edentulous area between distal of mandibular canine and ascending area of mandible (anterior to retromolar pad)
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Vertical Length:
- Length of lower posterior teeth should coincide with the center of the retromolar pad.
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Description
This quiz covers the essential concepts of selecting maxillary anterior teeth, focusing on their size, width, and length. It includes details on measurement techniques, clinical guidelines, and aesthetic considerations. Perfect for dental students and practitioners looking to refine their skills in prosthodontics.
