Reccuring Esthetic Dental Proportion

Many dental problems tend to have esthetics solutions which have good functionality and nice appearance. The advancement of new dental material gives dentists new options of treatment which increases the chance of having treatment with nice and attractive appearance. Many scientists and researchers have explored the beauty of a smile and how it is related in a fascinated way to the proportions and numbers. When someone wants to express happy and joy emotions he/she simply smiles. This smile is made by the movement of the teeth and lips.

Smiling makes people focus mainly in your mouth and eyes, so the esthetic look of the oral area when we smile is an essential part in the whole process .

Smile Design Parts : The smile design is divided into four parts: 1. Facial esthetics: this part includes lips and soft tissue curvature when someone speaks, laughs, and smiles.. Gingival esthetics: this part includes the health of the gingiva, shape of the interdental papilla and the presence or absence of black triangles.

Micro esthetics: this part includes the anatomy of the anterior teeth, incisal translucency, characterization and lobe development Macro esthetics: this part includes the properties of facial midline, size and shape of the teeth. Standard used proportions: As we mentioned above, the use of mathematics as proportions to estimate the best measures to design a nice smile is the basic concern of many studies. We can classify the proportions into three parts: The Golden Proportion: it takes into consideration mathematics and beauty measures relation.

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It takes into consideration the width of the central incisor and lateral incisor. It considers the best smile by having 62% of the maxillary lateral incisor and the width of the maxillary central incisor.

Also 62% proportion between the width of the maxillary canine and the width of the resulting lateral incisor. The Natural Proportions: this proportion is considering what is common in the nature. Some studies found that the width of the average maxillary lateral incisor was 66% of the width of the average maxillary central incisor and that the average maxillary canine was around 84% of the width of the average maxillary lateral incisor. Recurrent Esthetic Dental (RED) Proportions: it takes into consideration calculations related to the face, teeth and the body (many measures). It depends mathematically on linear coefficient progression; it works on frontal views of the width of each successive tooth. The most common used percentage is the 70%for normal length teeth. In some cases, dentist uses 80%, 75% 70%, 65% or 62%.

As we mentioned above, the selection of suitable RED proportion that fits and goes with the body/tooth height depends on many factors, such as teeth, mouth and body. The figure below clarifies the points. As we can see that each tooth becomes smaller by a fixed percentage as we move back in the mouth. The proportion between each tooth and the following is fixed as we can see below: Many dentists are preferring to use RED proportion especially for cases of very tall teeth and it is considered as guide in designing smiles (6). RED works in harmony with the face dimensions and it allows tooth length to better match in harmony with body length.

We can conclude that generating and crafting an ideal smile needs deep analyses and evaluations of the face, lips, gingival tissues, and teeth which all together shapes the ideal smile. There are many proportions applied to the teeth in order to obtain accurate and suitable measures. One of the famous measures is RED, which is mostly used with many proportions options depending on the shape of face, teeth, and body. Aesthetics not only depend on smile ,(personality,aesthetic,eyes ,clothes,hair ) .Aesthetic subjective &objective ,the fixed rule in aesthetic NO RULE.