Smile makeover and the oral facial harmony concept in a new era: relationship between tooth shape and face configuration.

The patient's facial characteristics play an essential role in achieving a customized smile restoration with appropriate individualized tooth shapes. By initially studying the patient's face, an approach can be determined to plan new individual tooth shapes to achieve a satisfactory outcome. The dental esthetic rehabilitation taking the facial proportion into account involves a complex planning process. To successfully realize such a project, several factors must be evaluated when designing the restoration, including dental alignment, crown dimension, color, occlusion, and facial proportions. Understanding all the anatomical parameters is essential to creating a harmonious esthetic restoration. The facial type of a patient is not only defined by facial symmetry, asymmetry or anthropology but also by an awareness of things through the physical senses (perception); the way things seem, look or feel (impression); and the perceiver's personal interpretation of esthetic excellence and attractiveness (beauty). Other aspects of the face that can be defined for the purposes of the restoration project include strong, dynamic, delicate, and calm.1,2 Nowadays, many patients seek a more attractive appearance. There are several techniques available to perform esthetically pleasing restorations. Ongoing research is being conducted in this area, for instance, the concept known as oral facial harmony.3,4 Dentists have been conducting orofacial analyses for decades, a process that involves applying mathematical rules and geometry principles to create parallel or perpendicular lines on a patient's face. The aim is to achieve harmony rather than symmetry in the redefinition of the smile, because people's faces are naturally asymmetric. The idea, then, is to create a balanced harmonious smile in relation to the patient's face, which is more important than trying to create a mathematically perfect symmetrical smile.5.