ABSTRACT
INTRODUCTION: Two aspects of the smile: the Smile Arc (SA) and Buccal Corridors (BC) have been the interest of the orthodontist in recent years. AIM: The present study was undertaken to evaluate the influence of the smile arc and buccal corridors on facial attractiveness as evaluated by orthodontists, general dentists and laymen. MATERIALS AND METHODS: Two subjects (one male & one female) were selected from the regional population fulfilling the criteria of an ideal smile arc and ideal buccal corridors. Frontal smile view photographs of these subjects were taken and modified by using adobe photoshop 7.0 to create combination of three smile arc variance and three buccal corridors variations respectively which were shown to 25 orthodontists, 25 general dentists & 25 laymen, to rate the facial attractiveness of each image on a rating scale. RESULTS: All the three groups (laypersons, dentists and orthodontists) showed significant difference in ratings, indicating that they had different perceptions on the facial attractiveness. CONCLUSION: Orthodontists were more precise in discerning the smile arc and buccal corridors compared to dentists and laypersons.
ABSTRACT
BACKGROUND: The study mentioned was aimed to examine the contribution of the objective measures representing anterior-posterior (AP) and vertical characteristics, dental esthetics, or their combination that are used in daily orthodontic practice in the assessment of the facial esthetics. MATERIALS AND METHODS: A panel of 64 laypersons evaluated the facial esthetics of 32 boys and 32 girls, stratified over four different angle classes, on a visual analog scale. The relationship between the objective parameters and facial esthetics was evaluated by the backward multiple regression analysis. RESULTS: Dental esthetics, expressed by the esthetic component of the index of orthodontic treatment need (AC/IOTN), appeared to be the most vital indicator for facial esthetics. The horizontal sum, a variable for AP characteristics of the patient, could be a better variable when compared with the overjet. CONCLUSION: Addition of this newly defined parameter to the AC/IOTN improved the prognostic value from 25% to 35%.
ABSTRACT
BACKGROUND: Tongue-tie (more formally known as ankyloglossia) is a congenital anomaly characterized by an abnormally short lingual frenulum, which may restrict the mobility of the tongue tip impairing its ability to fulfil its functions. Ankyloglossia is uncommon, but not rare. Incidence figures reported in the literature vary widely, ranging from 0.02% to 4.8%. Incidences of upto 10.7% have been reported. Since the literature provides no uniformity of information with regard to the incidence of tongue tie. The aim of this study was to evaluate the occurrence of tonguetie in general population and mentally challenged population, measure the grades of tongue-tie and also to determine the relations of gender with tongue-tie. MATERIALS AND METHODS: Seven hundred school children in the age group of 9-17 years were examined for the presence of tongue-tie, 350 from regular schools and 350 from special schools. The presence of tongue-tie was evaluated, measured and graded into grades 1 to 5 according to KOTLOW's method and data subjected to statistical analysis. RESULTS: Significantly higher incidence of 16.4% population having tongue-tie was identified, of which 18.57% were from general schools and 13.71% from special schools but the differences were not statistically significant. Males showed greater incidence than females and grades I, II, III were more predominantly seen than grade IV, but the differences were not significant statistically. CONCLUSION: Diagnostic criteria and definitive classifying systems are needed to allow for further comparative studies.
ABSTRACT
OBJECTIVES: To compare the shear bond strength of a nano-ceramic restorative composite Ceram-X Mono(TMâ¦), a restorative resin with the traditional orthodontic composite Transbond XT(TM) and to evaluate the site of bond failure using Adhesive Remnant Index. MATERIALS AND METHODS: Sixty extracted human premolars were divided into two groups of 30 each. Stainless steel brackets were bonded using Transbond XT(TM) (Group I) and Ceram-X Mono(TMâ¦) (Group II) according to manufacturer's protocol. Shear bond strength was measured on Universal testing machine at crosshead speed of 1 mm/minute. Adhesive Remnant Index scores were assigned to debonded brackets of each group. Data was analyzed using unpaired 't' test and Chi square test. RESULTS: The mean shear bond strength of Group I (Transbond XT(TM)) was 12.89 MPa ± 2.19 and that of Group II (Ceram-X Mono(TM)) was 7.29 MPa ± 1.76. Unpaired 't' test revealed statistically significant differences amongst the shear bond strength of the samples measured. Chi-square test revealed statistically insignificant differences amongst the ARI scores of the samples measured. CONCLUSIONS: Ceram-X Mono(TMâ¦) had a lesser mean shear bond strength when compared to Transbond XT(TM) which was statistically significant difference. However, the mean shear bond of Ceram X Mono was within the clinically acceptable range for bonding. Ceram-X Mono(TM) and Transbond XT(TM) showed cohesive fracture of adhesive in 72.6% and 66.6% of the specimens, respectively.
