A biometric comparison of face shape with denture tooth form

Abstract

Dentist and patient preferences are often used to select replacement teeth in prosthodontics. Face shape compared with inverted tooth form classifications based on Leon William's work are currently used. Shapes of teeth and faces have been referred to as square, ovoid or tapered, or some combination of these. Six patients, three male and three female, were selected as being classically square, tapered or ovoid in facial form. Three sets of dentures had been made for each patient with tapering, ovoid and square denture teeth. Using a standardized photographic technique, full face views with profiles and close-ups of the teeth were taken. Then from standardized enlarged tracings, key anatomic and derived points were marked, digitized and computer analysed. The face shapes and inverted tooth forms were digitized in the same manner. A comparison of tooth moulds versus the actual denture teeth shows a highly significant difference (P less than 0.001) between set and unset denture teeth. There is also a significant difference (P less than 0.001) between facial form and denture teeth using temporal zygomatic and gonial widths for faces, compared with incisal, contact, and cervical widths for the teeth.

Study of the morpho-dimensional relationship between the maxillary central incisors and the face

“…The results of this study are in disagreement with the findings of Marunick et al, 24 in which the square and oval shapes generated the largest number of positive results with regard to the pleasant appearance of the smile. The largest number of negative replies was given for the triangular contoured shape, and this was in agreement with the studies of Seluk et al 10 in which there was a certain rejection of the triangular-shaped teeth.…”

“…10 In the present study, it was observed that the association between the shapes of the face and maxillary central incisor was shown to be significant (Table 1). A relationship between the shapes of the tooth and face differing from this were obtained in the studies of Wolfart et al, 22 in which the square shape was the one that generated the greatest similarities.…”

“…A relationship between the shapes of the tooth and face differing from this were obtained in the studies of Wolfart et al, 22 in which the square shape was the one that generated the greatest similarities. In the studies of Seluk et al, 10 Varjão et al, 11 Sellen et al, 14 Mavroskoufis and Ritchie 15 and Sears, 23 no associations were observed between the shapes of the tooth and face.…”

“…7 Moreover, the face can be classified as square-, triangular-or oval-shaped. 10,11 In 1914, Williams 12 suggested that there is a relationship between the shape of the face and the shape of the teeth. 13 However, Sellen et al 14 mentioned that there is not necessarily any relationship between the shapes of the face and teeth, and other aspects that compose an esthetic analysis must be considered in order to establish the final shape of the teeth to be restored.…”

Aesthetic full-mouth oral rehabilitation of a young adult with amelogenesis imperfecta: a clinical report

“…This system of selection was developed in the early 1900s by Williams,34 but later investigations have shown that neither the form nor the size of the tooth correlates significantly with sex or the shape of the face. [35][36][37] Numerous methods have been devised for determining form of artificial teeth. Although no universally method has been found Williams method is the most accepted.…”