Buccal corridors and smile esthetics

      Purpose: The purpose of this study was to determine the influence of buccal corridors on smile attractiveness when judged by lay persons. Material: Full-face color slides of 10 randomly selected smiling subjects (5 women, 5 men) were digitized. The maxillary posterior dentitions for all subjects were digitally altered to produce a range of smile fullness: narrow (28% buccal corridor), medium-narrow (22% buccal corridor), medium (15% buccal corridor), medium-broad (10% buccal corridor), and broad (2% buccal corridor). The 5 images of each subject were paired into 11 possible combinations, and the resulting 110 pairings were randomly projected to a panel of 30 adult lay persons who compared the 2 images in each pair for smile attractiveness. Results: Statistical analysis with the Wilcoxon signed-rank and rank-sum tests showed that (1) a broader smile (minimal buccal corridor) was judged by lay persons to be more attractive than a narrow smile (larger buccal corridors), and (2) no significant differences were found in judging between male and female subjects or between male and female judges. Conclusions: Having minimal buccal corridors is a preferred esthetic feature in both men and women, and large buccal corridors should be included in the problem list during orthodontic diagnosis and treatment planning.
      To read this article in full you will need to make a payment


        • Hulsey C.M.
        An esthetic evaluation of lip-teeth relationships present in the smile.
        Am J Orthod. 1970; 57: 132-144
        • Mackley R.J.
        An evaluation of smiles before and after orthodontic treatment.
        Angle Orthod. 1993; 63: 183-189
        • Kokich Jr, V.O.
        • Kiyak H.A.
        • Shapiro P.A.
        Comparing the perception of dentists and lay people to altered dental esthetics.
        J Esthet Dent. 1999; 11: 311-324
        • Sarver D.
        The importance of incisor positioning in the esthetic smile.
        Am J Orthod Dentofacial Orthop. 2001; 120: 98-111
        • Sarver D.
        • Ackerman M.
        Dynamic smile visualization and quantification: part 2. Smile analysis and treatment strategies.
        Am J Orthod Dentofacial Orthop. 2003; 124: 116-127
        • Tjan A.H.
        • Miller G.D.
        • The J.G.
        Some esthetic factors in a smile.
        J Prosthet Dent. 1984; 51: 24-28
        • Dunn W.J.
        • Murchison D.F.
        • Broome J.C.
        J Prosthodont. 1996; 5: 166-171
        • Frush J.P.
        • Fisher R.D.
        The dynesthetic interpretation of the dentogenic concept.
        J Prosthet Dent. 1958; 8: 558-581
        • Johnson D.
        • Smith R.
        Smile esthetics after orthodontic treatment with and without extraction of four first premolars.
        Am J Orthod Dentofacial Orthod. 1995; 108: 162-167
        • Brisman A.S.
        J Am Dent Assoc. 1980; 100: 345-352
        • Burstone C.J.
        Lip posture and its significance in treatment planning.
        Am J Orthod. 1967; 53: 262-284
        • Janzen E.K.
        A balanced smile—a most important treatment objective.
        Am J Orthod. 1977; 72: 359-372