Evaluation of the ideal position of the maxillary incisor relative to upper lip thickness (original) (raw)
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American Journal of Orthodontics and Dentofacial Orthopedics, 2007
The purpose of this study was to determine the influence of chin prominence on preferred lip position in profile. Methods: Five "male" and 5 "female" silhouette profiles differing only in the degree of mandibular retrognathism or prognathism (Ϫ25°, Ϫ18°, Ϫ11°, Ϫ4°, and ϩ3°facial contour angles) were created. Using a computer animation program, the evaluators moved the upper and lower lips independently into the positions they deemed to be the most esthetic for each profile. The evaluators included white male and female adolescent orthodontic patients, parents of patients, and orthodontists. Results: In general, no differences in preferred lip position were found between the Ϫ11°and Ϫ4°profiles or between the Ϫ18°and ϩ3°profiles, but preferences for each of the 3 profile groupings (Ϫ11°and Ϫ4°, Ϫ18°and ϩ3°, and Ϫ25°) were different. Fuller lip positions were preferred for the more extreme retrognathic and prognathic profiles, whereas more retrusive lip positions were preferred for the more average profiles. No differences were found among the 3 evaluator groups or between male and female evaluators. Scattered differences were found among lip preferences for male and female profiles. (Am J Orthod Dentofacial Orthop 2007;132:36-42) a Private practice, Charlotte, NC. Estate Planning: The AAO Foundation offers information on estate planning to AAO members and their advisors on a complimentary basis and at no obligation.
Analysis of Select Facial and Dental Esthetic Parameters
The International Journal of Periodontics & Restorative Dentistry, 2014
This clinical study examined objective smile parameters in the natural anterior dentition. Standardized intraoral and extraoral photographs were taken of 106 Caucasian adults (54 women, 52 men) with a healthy dentition. The following parameters were analyzed: correlation of dental and facial midline, upper lip position and curvature, relationship of the maxillary anterior incisal curve with lower lip, number of teeth displayed in a smile, distance between maxillary anterior teeth and lower lip, slope of tooth, and lip arc. The simple frequency distribution of measured variables revealed an average smile with coinciding dental and facial midlines, an average smile line, and a straight upper lip curvature. With an average smile, the maxillary anterior teeth did not touch the lower lip, teeth were displayed up to the second premolar, and the maxillary anterior incisal curve was parallel to the lower lip. Oval was the most prevalent tooth form. A slope of 9 degrees was detected for the mean tooth arc and 13 degrees for the mean lip arc. The outcomes of this clinical study provide a quantifiable frame for esthetic evaluation, treatment planning, and restoration fabrication.
Esthetic preferences of orthodontists, dentists, and plastic surgeons for balanced facial profiles
Journal of Oral Science
The aim of this investigation was to determine whether the facial esthetics of subjects rated as "attractive" can be related to specific cephalometric soft tissue parameters. Methods: The profile silhouettes of 100 subjects (45 males and 55 females) were rated by 60 esthetics specialists (20 orthodontists, 20 dentists, and 20 plastic surgeons) using a Likert scale, and 30 of the subjects were selected as being "attractive". The cephalometric measurements of the attractive group were then compared with norms for the general Caucasian population. Results: The effects of specific measured parameters on profile beauty grades were assessed using the median test, and the following variables were found to show significant correlations between the Caucasian norms and the attractive profile group: the ratio of the upper to lower face height (P = 0.011), the ratio of the subnasale-labrale inferius (Sn-Li) and labrale inferius-menton (Li-Me`) lines (P = 0.011), the distance between the chin and the subnasale perpendicular (P = 0.002), upper lip thickness (P = 0.021), soft tissue chin thickness (P = 0.021), vertical height ratio (P = 0.021), and nasolabial angle (P = 0.021). Conclusion: A straight profile with a fuller and more protruded upper lip, a higher nasal tip, and a smaller lower facial third are considered to be the most attractive facial features, and may be useful for improvement of facial esthetics.
International Arab Journal of Dentistry
The aim of this study was to evaluate the impact of the vertical position of the maxillary lateral incisors borders on the perception of smile esthetics of a woman and a man, with respect to the resulting changes of the gingival margin, in order to determine the most esthetics position of the lateral incisors. Pictures of two smiles of different sexes were edited using Adobe Photoshop (Version CS5; Adobe Systems, San Jose, Calif). The vertical position of the lateral incisors was modified, while keeping the same crown length and height/width ratio, thus respecting the resulting changes of the gingival levels. 210 evaluators (70 dentists, 70 orthodontists and 70 laypersons) aged between 18 and 60 years old were asked to grade the pictures with a scale from 0 to 10, with zero as the most unattractive and 10 as the most attractive. 180 evaluators responded to the survey. Orthodontists are the most sensitive to changes in the level of the maxillary lateral incisors. The most attractive vertical relationship between the lateral and the central incisors was the 1.0 mm step. The laypersons were not able to find any statistical difference between the lateral incisors levels for both sexes. Particularly, this group gave a significantly higher score to the 0 mm step in comparison with the scores given by the orthodontists and dentists to the same picture. The perception of smile esthetics was identical between men and women. Flat smiles with central and lateral incisors borders at the same level are more appreciated by laypeople, and more accepted for men.
Assessment of smile esthetics and various types of face profiles
Acta stomatologica Naissi, 2020
Background: Imperfect smile and face profile is one of the main reasons why patients turn to orthodontists. Aim was to investigate if there is a difference in perception of smile and profile esthetics between the examined groups. Subjects and method: In conducted research, smiles of 21 persons (8 male and 13 female), 18 to 30 years old were evaluated by 15 orthodontists, 15 students of dentistry and 15 laypeople. They were to rate esthetics of every smile from 1 to 9 and choose just one main reason that impairs aesthetics. Orthodontists and laypeople should also evaluate male and female normal, bimaxillary prognathic and bimaxillary retrognathic profiles from 1 to 3. The most beautiful profile should be marked with number 3. Results: Although there was no statistically significant difference in the evaluation of smile esthetics among groups, laypeople gave the lowest evaluation. Apart from irregular position of certain teeth, all investigated groups emphasized different factors that...
Indicators and Preferences of Facial Profile and Aesthetics
Journal of Dentistry and Oral Sciences, 2021
For a successful orthodontic treatment, it is crucial to examine the patient in both frontal and lateral views. Evaluation of the skeletal pattern and softs tissues including nasolabial angle, anteroposterior lip position, labiomental angle and Lip-chin-submental plane angle must all be considered. Facial profile greatly affects the aesthetic appearance of the patients, however, not every person has the same aesthetic perception. This review aims to point out the indicators of facial profile and the perception of facial profile attractiveness among the different populations. Many studies have evaluated the preferences of facial profile, some of them agreed as a straight profile with normally positioned lips was the most favored, but some differences were noted between orthodontists and laypeople in the perception of the facial profile. Laypeople found a slightly retruded mandible or protruded mandible was found aesthetically pleasing for some populations. Therefore, it is important to involve the patient in treatment planning and decision-making.
Do different vertical positions of maxillary central incisors influence smile esthetics perception?
Dental Press Journal of Orthodontics
INTRODUCTION: The purpose of this study was to determine the perception of smile esthetics among orthodontists and layperson, with respect to different maxillary central incisors vertical positions in full-face and close-up smile analyses. METHODS: Frontal photographs of the smiles of two adult women were used. Images were altered to create a symmetrical image with the gingival margin levels of the maxillary canines matching the central incisors and a 1.0-mm central-to-lateral incisal step. Later, the images were altered in order to create six different central incisor vertical positions in 0.5-mm increments. The images were randomly assembled in an album, which was given to 114 judges, 57 orthodontists and 57 laypersons, who were asked to evaluate the attractiveness of the images using the visual analog scale. The data collected were statistically analyzed by means of 1-way analysis of variance with the Tukey post-hoc test and the Student t test. RESULTS: The highest rated smiles s...