Smile Design
Transcript: What is DSD? What is digital smile design? -It's a concept which simulates the final outcome of dental treatment by means of computer technology. -Smile design means analysis, design of proper treatment plan, proper communication with patient, lab then we start treating. To do a proper smile design we need to collect all the data needed like: chief complain, medical history, ect. Smile design is divided to Static Dynamic Static Data Static Designing : Static data are: -complain “present” -medical history -radiograph -photograph -impressions -Casts Dynamic Data The dynamic data consists of capturing the patient's true expressions and smile to create a smile that fits the patient's personality and character. First step of DSD First: There are some vertical and horrizontal lines that we need to put, and use it as a guidline. vertical lines: -Facial midline -Canine line -dental midline Horizontal lines: -Interpupillary line -Incisal plane -smile curve -commisural line -gingival curve measurements Teeth proportions: Usually men are 80% women usually are 75% -The golden proportion is a mathematically constant ratio between the larger and smaller length. The ratio is approximately 1.618:1 • -esthetic dental proportion (RED) as the proportion of the successive width of the teeth being constant when progressing distally from the midline 4. templates Ideal range 80% Range 75-85% Limit 70-90% Too short and/or wide Too long and/or narrower Teeth Form The Visagism concept helped clinicians and dentists to choose the proper teeth form based on the patient's personality . Classification of appearance and esthetics Macroesthetics: When individual teeth are considered as a single unit and contribute to esthetics as a group then it is regarded as macroesthetics. Macroesthetics attempt to evaluate the relationships of anterior teeth to each other as well as with their surrounding soft tissues. Macroesthetic Elements Connectors Symmetry Midline Incisal embrasures Tooth shape and harmony Axial Inclination of Teeth Teeth shown in a smile Shade Progression Teeth reveal M-position Upper lip position Upper lip curvature Lower lip position Vestibular space 1- Midline The goal of treatment is to achieve coincident upper and lower dental midlines which are in coincidence with facial midline for better esthetics as well as functional purpose.7-11 The midline between centrals should not be angulated to the facial midline. 2-Incisal embrasures It holds important role in smile esthetics. The dimensions of these spaces which includes volume and size is least in the midline and tends to increase on going away from the midline. 3- Connectors It is a large, broad area where two adjacent teeth seem to touch. For better esthetics, connecting area between anterior should follow the rule of 50-40-30. 4- Symmetry There are two types of symmetry: horizontal and radiating. Dentition follows radiating symmetry where the design starts from the centre point and both the sides are mirror images. 5- Axial Inclination of Teeth The long axis of the tooth inclines towards the midline and this tipping towards the midline increases as the distance from the centre point increases. 6- Shade Progression The shade and color patterns of upper teeth follow a progressive pattern with maxillary centrals being the lightest and canines having the greater saturation than other anteriors. 7- Tooth shape and harmony The tooth form of maxillary central incisor should be identical to the individuals facial outline upside down. 8- Teeth shown in a smile The teeth display during smile consists of anterior six teeth along with first and second premolars. 9- Teeth reveal It refers to the amount of tooth material that’s shown in different views and lip position. 10- M-position By asking the patient to utter letter “M” the minimum teeth reveal is assessed. The maxillary incisor display decreases as the patient ages. 11- Upper lip position: An average smile involves 75 % to 100 % of maxillary teeth display. A high smile shows total length of upper anterior as opposed to low smile display which involves less than 75% of teeth display. 12- Upper lip curvature Upward lip curvature means that the corner of the mouth is higher than the midpoint of the lower margin of the upper lip. 13- Lower lip position The relationship between upper anterior teeth and lower lip is of three types. 14- Smile line or smile arc Smile lines are of three types, straight, parallel and reverse. 15- Vestibular space In patients with narrow dental arch from have dark spaces between teeth and corner of mouth, referred as deficient vestibular reveal and have negative effect on esthetics. Microesthetics: Microesthetics involves the individual tooth characteristics like tooth anatomy, location, translucency patterns, lobe development and incisal haloing. Microesthetics - The micro-esthetic features are specific for each tooth. - The dentist and the laboratory technician should replicate these micro-esthetics in 3-
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