Background and Objectives: According to the modified Williams theory, the shape of the maxillary central incisor corresponds to the shape of the maxillary alveolar ridge (dental arch) and the shape of the face. Moreover, the standards of beauty suggest that the center of the face of an individual with a full set of teeth should match the center of the maxillary and mandibular dental arches. The purpose of this study is to conduct a comparative cross-sectional study on the matching of the shape of the face, maxillary central incisor and maxillary dental arch as well as the matching of the midfacial line and dental arches in subjects with complete dentition. Materials and Methods: The study included 90 subjects of both sexes. The matching of the shape of the face and midfacial line, i.e., dental arches and maxillary incisors, was determined by analysing photographs, whereas the shape of the dental arch was determined by analysing plaster models. Results: No significant gender-related differences were found either in the shape of the maxillary central incisor that matched the shape of the maxillary dental arch (p = 0.349) or in the shape of the dental arch that matched the shape of the face (p = 0.697). However, a significant difference was noted in the shape of the teeth that matched the shape of the face (p = 0.043), which was more significantly impaired in men. In addition, the matching of the mid-face and the mid-dental arch was significantly greater in women (p = 0.016). Conclusions: The modified Williams theory was confirmed in most subjects, thus it can be considered a relevant guideline when determining the shape of teeth after their loss. The highest percentage of matching in both sexes was with the shape of the face and dental arch. There was no positive correlation between the middle of the maxillary and mandibular dental arch in most cases.

UNASSIGNED: Face form is a useful reference in numerous clinical prosthodontic procedures for nearly ten decades since the postulation of Leon Williams typal form theory. Hitherto, face forms has been studied by clinical and photographic assessment methods and classified it as square, tapering, square tapering and ovoid forms. The existing method of classifying face form is subjective as it is derived on visual perception and hence alternative methods have to be studied further.
UNASSIGNED: The aim of the study was to analyze the existing classification of face form and to classify face forms based on geometrical method to eliminate the errors in classifying the face form by visual judgment.
UNASSIGNED: 200 subjects of age group 18 to 25 were investigated with the clinical method using face form indicator and photographic method. Reference points were marked on the face form indicator and the photographs to classify face form. A geometrical method was used to classify face form based on the angle of convergence in the photograph. Based on the angle of convergence between the widest part of the face to the lower, middle and the upper third of the face, face form was classified. This method of classification widens the existing classification of face form with three additional types of face forms.
UNASSIGNED: A Comparison was done between the face forms obtained by clinical and photographic methods. Face forms obtained by clinical and photographic method showed no significant differences (p > .05) between them.
UNASSIGNED: A geometrical method on photograph can be an effective method to analyze the various face forms to overcome the errors in visual judgment in the commonly used clinical method with face form indicator.

OBJECTIVE: To find out the anthropometric relationship of Inter-condylar distance to Inter-canine and Inter-molar distance of maxillary arch and occlusal vertical dimension in dentate individuals of South Indian population.
METHODS: A total number of 120 dentate individuals were randomly equally divided into Group A and Group B. According to the face form, each Group was again subdivided into four subgroups. Subgroup A1 and B1 contained Square face form, Subgroup A2 and B2 Tapered, Subgroup A3 and B3 Square tapered and Subgroup A4 and B4 Ovoid face form. The ratio of ICD to U3, U6 and OVD of Group A individuals were applied to the Group B individuals with similar face forms and the clinical significance of the ratios were evaluated.
RESULTS: No significant difference (p-value=0.841) was observed in the ratio of U6 to ICD (U6/ICD) in all the face forms. A significant difference (p-value = 0.010) in the mean value was observed when the ratio of OVD to ICD (OVD/ICD) was compared between the squared tapered face form of Group A (0.60 ± 0.01) and Group B (0.06±0.03). A significant difference (p value = 0.007) was observed between the measured (62.47 ±2.77) and calculated (64.99±2.61) values of OVD in square taper face form.
CONCLUSIONS: In south Indian population, ICD can be used as a reliable guide line to determine the bucco-palatal position of maxillary first molar irrespective of the face forms.