Perception about Importance of Buccal Corridor and its Width in Smile Esthetics

Aim: To assess the perception of dental students and house officers regarding role of buccal corridor in smile esthetics and to determine the most esthetically pleasing buccal corridor width. Methods: A photograph of the patient’s face, smiling with the teeth visible up to the first molar was modified digitally to create smiles with no buccal corridor, increasing buccal corridors widths of 5%, 10%, 15%, 20 % and 25% respectively compared with the width of inner oral commissure. A total of 376 dental students and HOs participated in the study and data was collected in questionnaires. Results: Buccal corridor is considered to affect the smile esthetics of an individual by 72.4% of house officers, 67.6% of second year students, 48.7% of 3rd year students and 52.4% of fourth year students(P value: 0.002). Visibility of around 5-10% of buccal corridor was considered most esthetically pleasing, however, the result was not significant. Conclusion: Buccal corridor is an important component in smile esthetics considered by students and house officers of dental colleges. Buccal corridor width of 5-10 % was considered most esthetically pleasing among participants. Keywords: Buccal corridor, Esthetics, perception

Effect of Buccal Corridors Width on Smile Quality and Esthetics

OBJECTIVE: To assess the perception of buccal corridor width on smile esthetics by Orthodontic residents, General dentists and Laypersons. METHODOLOGY: A smile photograph was taken of an adult female. The image was modified to obtain five different buccal corridor widths and were assessed by different evaluators grouped into general dentist, orthodontic resident and laypersons who rated the attractiveness of each smile by means of a visual analog scale (VAS). Sample size was 97 participants to rate the picture. Non-probability purposive sampling was done The data was analyzed and mean and SD were calculated for the scores of rating. ANOVA and Tukey's post hoc test was applied to compare the different ratings of buccal corridors in three groups. The data of this cross sectional study was collected from general population belonging to different communities, general dentists and orthodontic residents of different dental colleges of Karachi, Pakistan from August 2019 to March 2020. RESULTS: There were 97 participants who responded to the images. Highest scores were obtained for Image 1 having buccal corridor width ratio of 16% followed by image no. 3 having buccal corridor width ratio of 10% and lowest scores were obtained for Image no. 6 having least buccal corridor widths ratio that is 34% followed by image no 5 having 26% buccal corridor widths. Among the groups of participants, the highest scores were given by laypersons for all images. Significant differences were observed between evaluation of groups of Orthodontic resident and layperson in most images. CONCLUSION: There was a remarkable influence of buccal corridor width on smile esthetics, with the 16% ratio group being rated as the most attractive by all three groups. KEYWORDS: Buccal corridors, Smile, esthetics, Attractiveness

Effect of anterior overbite malocclusion on smile esthetics in adult patients

Objective To investigate whether overbite affects smile esthetics. Methods This study involved 106 patients with complete pretreatment records. Lateral cephalometric tracings were used to measure hard tissue variables. Frontal smile and upper occlusal photographs were used to measure nine smile esthetic variables: arc ratio, number of teeth, upper incisor exposure, upper midline, buccal corridor ratio, smile index, archform index, lower teeth exposure, and interlabial gap. The patients were classified into three groups according to their overbites (B1: 0–4 mm, B2: >4 mm, and B3: <0 mm). Analysis of variance was performed to compare 14 cephalometric measurements and the 9 smile esthetic variables. Multiple linear regression analysis was performed to determine the influencing cephalometric factors. Results Only upper incisor exposure was significantly different among the groups. In the multiple linear regression analysis, upper incisor exposure was positively associated with the distance from the upper incisor to the palatal plane in Group B2. No significant correlations were observed between cephalometric measurements and smile variables in Groups B1 and B3. Conclusions Smile variables were not significantly different among patients with various overbite malocclusions with the exception of upper incisor exposure. Overbite malocclusions do not appear to influence smile esthetics in adult patients.

Evaluation of smile esthetics in adults with different overjets

Our aim was to quantitatively assess the relationship of smile esthetics variables with various types of anterior overjet (OJ) malocclusion, and identify the cephalometric factors affecting smile measurements in different types of anterior overjet malocclusion. 90 patients undergoing orthodontic treatment in the Department of Orthodontics were selected for this retrospective study based upon the inclusion criteria. The patients were divided into the following groups according to their OJ: Group 1 (0-4mm), Group 2 (&#62;4mm), Group 3 (&#60;0mm).The upper lip height, and inter-labial gap differed significantly among the groups, whereas arc ratio, tooth number, upper midline, buccal corridor, smile index, arch form index and lower tooth exposure did not significantly among the groups. Some smile variables (upper lip height, inter-labial gap) differed significantly among different types of anterior overjet malocclusion. This study confirmed that the smile pattern varies between different types of malocclusion.

Evaluation of Perceptions of Smile Esthetics by Dental Students

Summary Background/Aim: The aim of this study was to investigate in the esthetic perceptions of 2nd grade dental students before and after training. Material and Methods: A total of 16 photographs which contain golden ratio, buccal corridor, midline deviation, incisal embrasure, lip line, midline diastema, dark triangles and smile arc were shown to 78 dental students (33 male, 45 female). Immediately after the training about the smile esthetics, the same photos were shown again. The effect of gender on esthetic perception was also examined, in addition to assessing the effects of education on esthetic perception. Pearson Chi-square, Fisher’s Exact test and McNemar test were used in the analysis of the results. Results: According to the results of the analysis, it was found that the answers of the smile arc before and after the education were statistically significant (p< 0.05). Accordingly, the rate of correct answers of women is statistically higher than that of men. A statistically significant difference was found between the responses to the gingival appearance in the smile before and after the education (p< 0.05). Conclusions: Based on the limited results of this study, professional dental education may affect the esthetic evaluation of smile. There were differences in the esthetic perception of women and men.

PERCEPTION OF ALTERED SMILE ESTHETIC AMONG DENTISTS, STUDENTS AND LAYPERSONS USING DIGITAL PHOTOGRAPHS: A COMPARATIVE STUDY

Objective: To investigate whether there is any difference in the perception of altered smile esthetics among dentist, students and layperson. Study Design: Comparative cross sectional study. Place and Duration of Study: Armed Forces Institutes of Dentistry Rawalpindi, from Jan to Jun 2019. Methodology: A total of 120 individuals were selected among which 40 were dentists, 40 were students and 40 lay persons to evaluate smile on given questioner. An individual was photographed in frontal posed smile using a digital camera at natural head position. The photograph was digitally manipulated with minor changes and only desired area of face was framed using Adobe Photoshop CC 2018 software to generate a control and ideal smile. Series of photographs were generated by doing modifications to evaluate five variables including Smile arc, Gingival display, Buccal corridor, Midline shift and Midline diastema. The each group was also asked to rate attractiveness each picture on 5 points Visual Analog Scale (VAS) from 1- Most attractive to 5- Least attractive. Results: The p-value was for midline diastema and midline shift was <0.01. Most of the study population was females 75 (62.5%) and the mean age of participants was 27.51 ± 5.42. Significant difference was observed at VAS in flat smile arc, nil buccal corridor, mid-line shift and midline diastema by study groups. Conclusion: Perception of midline diastema and midline shift differs significantly among dentists, students and lay persons.

DIFFERENCES AMONG THE PERCEPTIONS OF ORTHODONTISTS, PROSTHODONTISTS AND CONSERVATIVE DENTISTRY SPECIALISTS REGARDING BUCCAL CORRIDOR WIDTHS

ABSTRACT BACKGROUND & OBJECTIVE: To find out the optimal ranges of smile attractiveness on basis of different amounts of buccal corridor widths, as judged by Pakistani orthodontists, prosthodontists and conservative dentistry specialists (CDS). METHODOLOGY: Present cross-sectional study was conducted from June 2016 to June 2017. The anterior smiling image of a female model was edited to be converted to 10 images displaying different amounts of buccal corridor width. After informed consent from the subject, different buccal corridors widths images were created at following widths: 0%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, and 18%. This was followed by measurement of smile attractiveness of these 10 images on a visual analogue scale by 30 evaluators in three groups. Group 1 consisted of 10 CDS, group 2 consisted of 10 prosthodontists and group 3 consisted of 10 orthodontists. The data was collected and scores of smile attractiveness were presented in form of mean and standard deviation for each group. The differences in the three groups regarding perception of smile attractiveness were found out using ANOVA test and Turkey’s post-hoc test was used for multiple comparisons. RESULTS: For group 1, the highest scoring was obtained by image showing 10% buccal corridor width. In group 2, the highest score was by image showing 14% buccal corridor width, whereas in group 3, the highest scoring was showing 12% buccal corridor width. The differences found were statistically insignificant. CONCLUSION: Dental specialty does not affect perception of smile attractiveness. Buccal corridor width greater than 14% should be avoided.

Perception and Characterization of Posed Smile: A Photographic Study

Aims of the Study: The aims of the study are: (a) to compare the perceptions of dental specialists and laypeople regarding smile esthetics; (b) to compare male and female smile parameters; (c) to find influence of smile parameters on esthetics of smile. Materials and Methods: The study was conducted on 60 subjects (30 males and 30 females) of age 18 to 25 years. Frontal posed photographs of all subjects were taken using a digital camera and rated on a visual analog scale by 10 dental specialists and 10 laypersons. Measurements made on photographs were used to analyze various parameters of smile, such as buccal corridor space, smile arc, modified smile index, anterior height of smile, most posterior maxillary tooth visible, and midline relationship of central incisors to philtrum. Results: Visual analog scale values showed that 6 photographs were rated as very good (3 males, 3 females), 29 as good (11 males, 18 females), 21 as average (13 males, 8 females), and 4 photographs were rated as bad (3 males, 1 female). A high correlation was observed between ratings of dental specialists and layperson’s ratings for both male and female smiles. Most of the subjects had non-consonant smile arc, and a high correlation was found between buccal corridor space on right and left sides in both males and females. Most of the male and female smiles had an average anterior height of smile; permanent maxillary first molar was the last tooth visible during smile (73.3% females, 66.7 males); and 55% subjects had coincident midline relationship of central incisors to philtrum. Conclusion: There was no significant difference in perception of dental specialists and laypersons regarding esthetics of smile. Smile arc and anterior height of smile influenced the esthetics of smile. No significant difference was found between male and female smile parameters except modified smile index.