ABSTRACT
BACKGROUND@#To test the hypothesis that in profile smiling view, for ideal aesthetics, a tangent to the labial face of the maxillary central incisor crowns should be approximately parallel to the true vertical line and thereby perpendicular to the true horizontal line.@*METHODS@#An idealized female image was created with computer software and manipulated using the same software to construct an “ideal†female profile image with proportions, and linear and angular soft tissue measurements, based on currently accepted criteria for idealized Caucasian profiles. The maxillary incisor labial face tangent was altered in 5° increments from 70 to 120°, creating a range of images, shown in random order to 70 observers (56 lay people and 14 clinicians), who ranked the images from the most to the least attractive. The main outcome was the preference ranks of image attractiveness given by the observers.@*RESULTS@#The most attractive inclination of a tangent to the labial face of the maxillary incisor crowns in profile view in relation to the true horizontal line was 85°, i.e. 5° retroclined from a perpendicular 90° inclination. The most attractive range appears to be between 80 and 90°. Excessive proclination appeared to be less desirable than retroclination. Beyond 105° most observers recommend treatment.@*CONCLUSION@#In natural head position, the ideal inclination of the maxillary incisor crown labial face tangent in profile view will be approximately parallel to the true vertical line and thereby approximately perpendicular to the true horizontal line.
ABSTRACT
BACKGROUND: In the absence of clear guidelines for facial aesthetic surgery, most surgeons rely on expert intuitive judgement when planning aesthetic and reconstructive surgery. One of the most famous theories regarding “ideal” facial proportions is that of the golden proportion. However, there are conflicting opinions as to whether it can be used to assess facial attractiveness. The aim of this investigation was to assess facial ratios of professional black models and to compare the ratios with the golden proportion. METHODS: Forty photographs of male and female professional black models were collected. Observers were asked to assign a score from 1 to 10 (1 = not very attractive, 10 = very attractive). A total of 287 responses were analysed for grading behaviour according to various demographic factors by two groups of observers. The best graded photographs were compared with the least well-graded photographs to identify any differences in their facial ratios. The models’ facial ratios were calculated and compared with the golden proportion. RESULTS: Differences in grading behaviour were observed amongst the two assessment groups. Only one out of the 12 facial ratios was not significantly different from the golden proportion. CONCLUSIONS: Only one facial ratio was observed to be similar to the golden proportion in professional model facial photographs. No correlation was found between facial ratios in professional black models with the golden proportion. It is proposed that an individualistic treatment for each ratio is a rather better method to guide future practice.
Subject(s)
Female , Humans , Male , Beauty , Demography , Methods , SurgeonsABSTRACT
This study aimed to evaluate oral health-related quality of life [OHRQOL] changes following third molar surgery, and investigate demographic and clinical variables' effect on [OHRQOL] in the first postoperative week. 45 subjects had surgical removal of lower third molar/s by one surgeonat Jordan University hospital from March 2011 to November 2011, following a standardized protocol. Patients' demographics and clinical data were recorded. [OHRQOL] was evaluated before surgery using the Oral Health Impact Profile [OHIP]-14. On postoperative days [PD] 1, 3, 5 and 7, patients completed the [OHIP]-14 and the condition-specific [HRQOL] instrument. A significant deterioration in OHRQOL was seen on [PD]1[P=0.000], and [PD]3 [P=0.000], except for psychological discomfort and disability domains. On [PD]5, no difference was found, however, females had significantly lower OHRQOL levels than males on [OHIP]-14 [P=0.008] and the domains: physical [P=0.048], psychological [P=0.016] and social disability[P=0.018]. Third molar surgery was associated with deterioration in patients' OHRQOL on the first three postoperative days. Females had a slower recovery, with no effect of other factors on patients' recovery pattern
ABSTRACT
To compare the accuracy and reproducibility of tooth measurements using newly developed software that gives 2-dimensional scanned images of dental setups with direct measurements using digital calipers. This experimental study was performed at the Dental Laboratories of the Faculty of Dentistry, University of Jordan, Amman, Jordan from September 2010 to December 2010. Ten sets of acrylic teeth [10 upper and 10 lower arches] were used. The mesiodistal width of each individual tooth was measured using a digital caliper [method I], which was considered the gold standard. The teeth were set to create 20 dental setups. The mesiodistal widths of teeth on the created setups were then measured by using a digital caliper [method II]. The dental setups were then scanned using a flatbed computer scanner and tooth width measurements were performed using a special computer program [method III]. Tooth measurements were divided into 6 groups, and the 3 methods were compared. There was a statistical significant difference between the 3 measurement methods in most of the measured tooth groups. Methods I and II exhibited significant differences for most of tooth groups [ranged from 0.02 to 0.22 mm] while no significant difference was found between methods I and III [ranged from 0.03 to 0.11 mm]. Tooth width measurement with onscreen 2-dimensional scanned images of dental casts is comparable to measurements obtained using direct digital caliper