Download - Diastema Closure
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Topics for Today Closing Diastemata Shade Matching with Composite
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Diastema Diastemata (pl) A space between two adjacent
teeth in the same arch 25% of american population have a
midline diastema (McVay 1984)
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Etiologic factors Prominent labial frenum Congenitally missing teeth Undersized or malformed teeth Tooth/arch discrepancies Habits Periodontal disease
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Treatment Options Orthodontics Direct composite Porcelain labial veneers Full crowns
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Advantages of Direct Composite Minimal preparation Good optical match Relative cost low Easily repaired
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Disadvantages of Direct Composite Skill dependent Potential repairs Potential staining Surface finish and abrasion
resistance
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Requirements of Composite Strength (hybrids) Translucency (hybrids) Excellent finish (microfills) Margin integrity (microfills)
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Translucency Composite type
MicrofilledMicro-hybrid
1mMore TranslucentLess Translucent
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Matching the Appearance of Teeth Symmetry and proportionality Shape and form Position and alignment Surface texture Color Translucency
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Criteria
Color Midline centered Facial contours Incisal contours
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Matching the Appearance of Teeth Color Translucency
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Shade Guides
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Shade Guides Vita Lumin
A=red-brown B=red-yellow C=greyish D= red-grey
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3 Dimensions of Color Hue
Value Chroma
A=red-brown B=red-yellow C=grayish D= red-gray
Squint to evaluate
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Why do shade tabs look natural? Layered Color Translucency
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Shade selection and matching Educate patient Remove lipstick Clean teeth Wet teeth Dont stare
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Shade selection and matching Rest eyes (medium blues) Use assistants and patients Look at total tooth then specific
areas Use different light sources
(metamerism)
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Final Resin Shade Color of underlying tooth Thickness of resin Polymerization
Yellow-blue Opaque -translucent
Finish and polish
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Other Alterations of Teethwith Composites Incisal edge wear Embrasure closings Minor tooth rotations Reshaping teeth
Canines in lateral position
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Symmetry and Proportionality
Golden proportions - 62% Width/length - .75-.80%
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Not a perfect world
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Shape and Form Wider or narrower
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Shape and Form
Shorter or taller
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End of Story