Objectives: 1. To formulate a normative data/Research data of maxillary arch dimension and cleft width in UCLP patients. 2. To formulate a Posterior cleft width prediction equation using anterior cleft width, which will help in organising the future treatment plan in the required sequence. Materials and Methods: A Sample of 20 unilateral CLP patients were selected from a patient pool who had reported to CMCH, for treatment. This study was approved by ethical committee at CMCH, Vellore. Inclusion criteria: 1. Models of patients with unilateral CLP were selected. 2. Models were taken before any Presurgical manipulation of hard or soft tissues was done. 3. Age of the patient was 3 to 4 months without any treatment began. Methods: The landmarks anterior, mid, posterior arch width was marked on the Study Model measurements were made using the digital Vernier caliper Figure and documented on excel worksheets. Data were summarized using mean and standard deviation. We used a linear regression model to identify the prediction equation of posterior having posterior as an outcome and anterior as predictor. The scatterplot with the linear fit was used to visualize the prediction. All the data were analyzed using STATA IC/16.0. Results: 1. Normative data was tabulated. 2. Prediction equation of posterior from anterior width Posterior= 39.25-0.21*(anterior). The equation explains that when anterior increase posterior decrease and this can quantify as for one-unit increase in anterior there will be 0.21 decrease in posterior width, but this change is not statistically significant (p=0.447). Conclusion: 1. A normative data of maxillary arch dimension and cleft width in UCLP patients was developed and tabulated which will be also be useful as Research data. 2. The Posterior cleft width prediction equation using anterior cleft width, will help in formulating the future treatment plan in required sequence and ease the method of impression making in unilateral Cleft lip and palate patients.
Objectives: To produce odontometric data and formulate a new regression equation for prediction of unerupted canine and premolars in Chennai population.
Materials and methods:The present study comprised of 400 study models (200 males and 200 females) obtained from Postgraduate Students of Department of Orthodontics, Saveetha Dental College, Chennai. The mesiodistal width of teeth from molar to molar in the maxillary and mandibular arches was measured using digital Vernier caliper and used to formulate the odontometric data and regression equation (to predict the width of unerupted canine and premolars).
Results:The following are equations derived for prediction of unerupted canine and premolars in Chennai population:Males-Maxilla: y = 7.071 + 0.77x, Mandible: y = 6.430 + 0.650x; Females-Maxilla: y = 1.276 + 0.769x, Mandible: y = 7.388 + 0.605x Where, x = summed mesiodistal widths of the four mandibular incisors in millimeters, and y = estimated sum of mesiodistal widths of canine and two premolars in one arch quadrant, in millimeters.
Conclusion:The observations obtained from our study would not only pave the way in predicting the mesiodistal width of unerupted canine and premolar in Chennai population but also give normative odontometric data which can be used for anthropological use and for diagnosis and treatment planning.
Objectives: 1) To Formulate a normative data of variables affecting the eruption of third molar. 2) To help format a research data to compare variable changes occurring during formative and eruption stage (11-16 years)of third molar. Materials and Methods: The sample comprised of Orthodontic patients at CMCH from 2012-2019, within an age group of 11years -16 years, which was approved by the ethical committee. 40 Male and 40 Female Patient's Orthopentogram with complete set of teeth were considered in the study. The measurements analysed were: 1) Retromolar space:is distal contact of PMM2(Permanent mandibular second molar) and junction of occlusal plane to the anterior border of the mandible. 2) Gonial Angle: angle between the tangent from inferior border of the mandible and posterior border of the mandible. 3) Mesiodistal width of second molar : greatest distance between mesial and distal portion of the crown. 4) Mesiodistal width of third molar: greatest distance between mesial and distal extension of the crown. 5) Angulation of first and second Molar : the angle formed between the long axis of PMM1 (Permanent mandibular first molar) and PMM2 (Angulation m1m2). 6) Angulation of second molar to base of Mandible: the angle formed between the long long axis of PMM2 and the tangent drawn to the inferior border of the mandible (Angulation m2bm). 7) Nolla's classification of third Molar. Trophy Dicom; carestream LS 8000c machine programmed with Kodak software was used to record the digital OPG with standard protocol and head position. The 7 Variables were analysed with the Kodak software and the measurements were recorded on excel worksheet. Results: The Data was used for comparison of all variables to explore gender specific differences, only the mesiodistal width was significantly different between the gender. A descriptive table was formulated with a range of measurements for all variables. A correlation between Retromolar space and all other variables was analysed ,there is a positive correlation with formation of third molar(Nolla's grading) and retromolar space in females and it is statistically significant. Though a weak ,correlation exists between other variable and retromolar space ,it was not statistically significant. Conclusion: 1) A normative data and Data for future research, of variables affecting the eruption of third molar in their formative and eruptive stage was Formulated. 2) Though a weak correlation exists between other variable and retromolar space during the formative and eruption stage of third molars.
Introduction:
The novel COVID-19 which spread's primarily through oral and nasal passage poses a major threat of spread during dental treatments. It is important for dental practitioners to use minimal aerosol techniques. The aim of this study is to compare the time taken, efficiency and aerosol generated between modified and conventional technique (CT) of bracket bonding.
Methods:
This study includes 40 patients who required complete orthodontic treatment. In all 40 patients, one of the arches was bonded with modified technique (MT) and the opposing with CT. The time taken to prepare tooth in both the techniques were accessed. The efficiency of bond was seen over a period of 6 months. The amount of aerosol particulate matter generated during CT and MT was observed using a laser air quality monitor
Conclusion:
There is no significant difference in the bond failure and time taken between both the techniques. The aerosol generated in MT was minimal or almost negligible when compared to the use of CT.
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