- The width of the face should be the width of five “eyes”.
- The distance between the eyebrow and chin should be equal to the width of the face.
Smile Design is a multipurpose conceptual protocol which provides remarkable advantages:
The goal of an esthetic makeover is to develop a peaceful and stable masticatory system, where the teeth, tissues, muscles, skeletal structures and joints all function in harmony (Peter Dawson). It is very important that when planning treatment for esthetics cases, smile design cannot be isolated from a comprehensive approach to patient care. Achieving a successful, healthy and functional result requires an understanding of the interrelationship among all the supporting oral structures, including the muscles, bones, joints, gingival tissues and occlusion.
Facial beauty is based on standard esthetic principles that involve proper alignment, symmetry and proportion of face.
In classical terms, the horizontal and vertical dimensions for an ideal face are as follows:
The basic shape of the face when viewed from the frontal aspect can be one of the following:
The lateral profile of an individual can be any one of the following:
These factors play a role in determining the tooth size, shape and the lateral profile; in short, the tooth morphology is dependent on the facial morphology.
Various guidelines for establishing correct proportions in an esthetically pleasing smile are:
This method compares the tooth width with the facial width using a software. The whole analysis is done in the computer and hence involves more of mathematics rather than artistic analysis.
Dr. Chu’s research supports Levin’s RED concept and refutes the golden proportion. A series of gauges are available to make intraoral analysis easier. The gauges allow for: