The importance of width/length ratios of maxillary anterior permanent teeth in esthetic rehabilitation.

The aim of this study was to investigate the importance of the width/length (W/L) ratio of maxillary anterior permanent teeth in anterior esthetic rehabilitation. Digital photographs were taken of the anterior teeth for each participant (approximately 20 years old). A maxillary impression was taken with irreversible hydrocolloid and cast in die stone under vacuum. The widest mesiodistal width and incisogingival length of the tested teeth were measured. The data were submitted to analysis of variance, which showed significant statistical differences within each parameter (P< .05). The width and length measurements varied between maxillary anterior teeth in the following or der: central incisors > canines > lateral incisors. Maxillary central incisors displayed the largest W/L ratio (85%), maxillary lateral incisors (LI) displayed the smallest W/L ratio (79%), and canines displayed the intermediate W/L ratio (83%). These dimensions have a positive effect on the final restoration; therefore, it is suggested that the specific width, length, and W/L ratio should be used in esthetic rehabilitations of maxillary anterior teeth.