Aesthetics is a science about beauty. Iti is connected with sensual perception. Rules are changing during the time a there are differences in various regions. .
„Penta en arithmo"
(Pythagoras)
1/1,618 = 0,618
Golden cut
Perception of the object
Composition
Single items
Harmony
Symetry
Dominanca
Lines
Dentofacil harmony
• Imaginary lines - stuctures must have harmonious relation to them
• Teeth are in harmony with the face, they can attract our attention and distract it form other structures
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Profile:
E-Plane
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Line of smile
• Connects incisal edges of upper frontal teeth and touches cusos of upper molars. Lower border is lower lip. Line of lower lip is parallel to line of smile.
• Upper central incisors should be in touch with wett part of upper lip.
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Line of smile
Normální Zvětšený
Bilateral negative space
lroubalikova@gmail.com 10
Dental harmony
Inclination of long axis Slight mesial inclination of long axis Slight inclination vestibulary Position of contact points: They become smaller and move apically (50:40:30)
Their elongation can optically widen teeth
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Dental harmony
Interincisal spaces become smaller in distal direction
They become smaller in younger individuals
Relation between width and height
Optical width
Golden cut
Width Height
= 0,618 Height      Width + Height
Decreasing of width 40% in distal direction
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Shape of crown principally corresponds to shape of the face
• Shape of the face: angular, oval a triangular
• Corresponding shapes of teeth
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Front
Zygomatic line Mandibular line
Curvature of labial surface - reflection