R.A. Al-Aslami1, Bandar M.A. AL-Makramani1, Ibrahim Z. AL-Shami1, Fuad A.A. AL-Sanabani,2
1 Assistant Professor, Department of Conservative Dentistry, Faculty of Dentistry, Sana’a University, Sana’a, Yemen.
2 Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Sana’a University, Sana’a, Yemen.
The pleasant appearance of any restorative treatment of upper anterior teeth is an important objective which must be ensured by the dentist to satisfy the patient. The harmony between the width of central incisor, lateral incisor and canine will result in esthetic smile.
Many studies have published different postulated geometrical and mathematical ratios of upper anterior teeth to achieve the esthetic appearance. The golden proportion between two parts is 1.62:1 which means that the smaller part is 62% of the larger part. The uniqueness of this ratio is that the ratio of the smaller part to the larger part is the same as the ratio of the larger part to the whole . This proportion was introduced in dentistry by Lombardi in 1973 as a guideline to achieve the esthetic
appearance of maxillary anterior teeth when they viewed from the anterior .
Based on that, the width of lateral incisor is 62% of the width of the central incisor and the width of the canine is 62% of the width of lateral incisor. The golden proportion of anterior teeth is used in dentistry as an esthetic guideline. However, many investigators found that the golden proportion is not common in natural teeth in samples of esthetic smile [3,4].
In 1999 the golden percentage was proposed by Snow as an alternative guideline that could be used to distribute the width of maxillary anterior teeth . The author stated that, the percentage of the width of each upper anterior tooth on each side should be as follows: central 25%,