Comparative evaluation and applicability of three different regression equation-based mixed dentition analysis in Northern Uttar Pradesh population.

AIMS: This study aims to examine the accuracy and comparative correlation of three regression equation-based mixed dentition analysis in children of Moradabad city, North Uttar Pradesh. SETTINGS AND DESIGN: Tanaka-Johnston, Bernabe-Flores-Mir, and Ling-Wong regression equations were developed from a sample of North European, Peru, and Southern Chinese children population, respectively. Hence, it becomes questionable when applied to children of Moradabad city situated in North Uttar Pradesh, India. SUBJECTS AND METHODS: The study was conducted on a sample of 100 school going children, age range is 11-14 years with complete permanent teeth except third molars. The mesiodistal crown dimensions of all erupted incisors, canines, premolars, and molars were measured with digital calipers with a calibration accuracy of 0.01 mm. The actual tooth measurements were then compared with predicted values using Tanaka-Johnston, Bernabe-Flores-Mir, and Ling-Wong regression equations, respectively using paired t-test. RESULTS: The mean difference between the actual and estimated values of canines and premolars using Tanaka-Johnston, Bernabe-Flores-Mir, and Ling-Wong were clinically and statistically significant (P< 0.001). CONCLUSIONS: Mesiodistal dimensions of male samples are larger than female samples. All the three regression equations are not accurately applicable to this population.

Effect of Qmix and Other Irrigants on Dentin Adhesives in Pulp Chambers of Primary Teeth: SEM Study.

OBJECTIVE: To compare the effect of different endodontic irrigants on microleakage of adhesives used within pulp chamber of primary molars. STUDY DESIGN: 72 Primary molars were divided into 6 groups, according to 3 irrigants and 2 adhesives used. After de-roofing the pulp chamber, pulp was extirpated. In 36 samples, pulp chambers were bonded with Xeno V+ after irrigation with either QMix (Group1); 17%EDTA+5%NaOCl (Group2) or normal saline (Group3) and in other half samples, pulp chambers were bonded with SinglebondUniversal after irrigation with either QMix (Group 4); 17%EDTA+5% NaOCl (Group5) or normal saline (Group 6). All the samples were restored with Filtek Z350. Ten teeth from each group were assessed for dye penetration. Two samples in each group were viewed under scanning electron microscope. Data was statistically analyzed using Mann-Whitney and Kruskal Wallis tests at a significance level of P < 0.05. RESULTS: Mean microleakage scores were: Group 1-1.5±0.70, Group 2-1.6±.51, Group 3-2.4±0.96, Group 4-1.2±0.42, Group 5-1.2±0.42, Group 6-1.1±0.32. CONCLUSIONS: Irrigation with QMix significantly reduced the microleakage of XenoV+ but had no significant effect on microleakage of SinglebondUniversal. Irrigation with EDTA/NaOCl or QMix had no detrimental effect on the sealing ability of either of the adhesive tested.

Evaluation of Three Different Regression Equations Based Mixed Dentition Analysis in Children of Moradabad City, India

Objective: To assess the accuracy and applicability of three regression equations based mixed dentition analysis in children of Moradabad city, India. Material and Methods: Actual mesiodistal width of maxillary and madibular incisors, canines and premolars of 100 children (50 male and 50 female) aged 11-14 years were measured on dental cast with electronic digital vernier caliper. The analysis of Tanaka- Johnston, Ling-Wong and Jaroontham-Godfrey regression equations were tested on the dental casts. All analyses were performed on SPSS software. Data were summarized as Mean ± standard deviation (SD) paired observations were compared by paired t-test (two-tailed test) while independent groups were compared by independent Student's t-test. The level of significance was at P < 0.001. Results: The analysis of Tanaka-Johnston, Ling-Wong, Jaroontham-Godfrey regression equations tended to overestimate the mesiodistal width of the canines and premolars with the actual measured values. Conclusion: All the three regression equations based mixed dentition overestimated the mesiodistal width of canines and premolars in Moradabad population.

Endodontic Management of Maxillary First Molar with Five Root Canals, Including Two Distobuccal Root Canals: A Case Report.

Multiple canals in the root are part of the normal morphology of the tooth. A canal may sometimes be overlooked, however, and this may lead to failure of treatment. The first step in successful endodontic treatment, therefore, is gaining access to the pulp chamber and locating all the canals. In order to achieve this goal, practitioners need to be familiar with all possible variations in root canal morphology, and should thoroughly explore roots to ensure that all canals are identified, debrided, and obturated. Here, we report the diagnosis, treatment planning, and endodontic management of a maxillary first molar with five root canals, including two distobuccal root canals, in a 22-year-old woman.

Endodontic management of four rooted mandibular first premolar.

Mandibular premolars have earned the reputation for having aberrant anatomy. The literature is replete with reports of extra canals in mandibular first premolars, but reports about the incidence of extra roots in these teeth are quite rare. This paper attempts at explaining a rare case of successful endodontic management of a four-rooted mandibular first premolar with diagnostic, interoperative and postoperative radiographic records along with a substantial data on the incidence of extra roots in these teeth. The standard method of radiographic appraisal was maintained as the criteria for determining the presence of extra roots.