Elements of Smile Design Flashcards
what is involved in the esthetic analysis
- facial symmetry
- smile symmetry
- occlusion
- tooth shape and color
what type of data should be collected
- preclinical interview
- intra-oral photography
- diagnostic casts with facebow transfer
- comprehensive dental exam
- esthetic analysis
what is observed in facial symmetry
- inter pupillary line
- midline axis
- commissural line
- occlusal plane line
what are used for the anatomic midline
cupids bow and philtrum
the dental midline refers to:
the vertical contact interface between two maxillary centrals
the dental midline should be coincident with:
the facial midline axis
the dental midline is not noticeable by most people up to ____ as long as it is parallel to the midline axis
4mm
max and mand dental midlines do not coincide in about _____ of cases
75%
canted dental midline is _____ esthetically unpleasant and more noticeable than shifted midline
more
what is observed in smile symmetry
- buccal corridor
- smile line
- tooth reveal
- gingival height and position
smile line influences the final configuration of:
- the incisal edge position
- crown form
- length of the maxillary anterior teeth
acceptable results in smile symmetry occur when:
- the maxillary incisal edges are parallel to the line of the lower lip
- the lateral incisors are 0.5mm to 1.5mm above the lower lip line
- the centrals and cuspids will approximate the lower lip near or at the vermillion border
what is the buccal corridor
the area distal to the canines between the buccal surfaces of the posterior teeth and the buccal mucosa. it enhances or detracts from symmetry
what factors are assessed in the buccal corridor
- negative space
- canine prominence
- value/color of premolars
- position of premolars
- tone of facial muscles
what is evaluated in tooth reveal
evaluation of upper lip line, lip movement (hyper vs hypo) and position (high vs low) and its effect on tooth exposure
- line connecting papillae will ideally follow upper lip contour
- exposed tooth at rest can impact perceived age
youthful smile shows ____ of centrals
2-4mm
adults show ____ of tooth
2mm
which gender shows more tooth at rest
females
what is the lip line
the amount of vertical tooth exposure in smiling
- the height of the upper lip relative to the maxillary central incisors
what is a normal lip line
more than 75% of central incisors - 2mm of gingival display
what is a low lip line
less than 75% of central incisor display during smiling
what is a high lip line
more than or equal to 3mm gingival display during smiling
what does upper lip form refer to
the curvature of the upper lip during smiling
what is the upper lip form assessed by
the position of the philtrum in relation to the commissural ine
