ABSTRACT
Objectives: This study compares the precision of cone beam computed tomography (CBCT) and two-dimensional radiography for mini-implant implantation. Materials and Method: For 30 sites (in 15 patients between the ages of 13 and 26 years), the buccal interradicular region among the 2nd premolar and 1st molar was found to be the best location for mini-implants. Next, two groups of the mini-implant implantation process were created. Mini-implants were positioned at the CBCT data-identified sites in the CBCT group. Mini-implants were inserted in the RVG group by using two-dimensional digital radiography and a specially constructed guide. To assess the precision of the mini-implant implantation, post-placement CBCT images were acquired. The obtained data were statistically analyzed. Result: The two groups showed a statistically considerable variation in the mini-implant placement's departure from the optimal height. Due to the smaller interradicular space and decreased convenience in the posterior mandibular area, two out of 15 mini-implants in the RVG group demonstrated root contact in the mandibular jaw. Conclusion: The two-dimensional intraoral radiograph of the interradicular area provides sufficient information for mini-implant placement even though CBCT accurately visualizes the interradicular space in three dimensions.
ABSTRACT
AIM: Determination of skeletal and dental age is very essential for Pediatric dentist and orthodontist to formulate a treatment plan, and it is a source of supplemental information for Pediatrics, Orthopedics, and Forensics. There are no available studies in the literature about the comparison of dental and bone age with chronological age in obese children of south India. Accordingly, the aim of this study was to evaluate and compare dental age, bone age, and chronological age in obese children of south India. MATERIALS AND METHODS: Ethical approval was obtained from the ethical committee of college, and informed consent was obtained from parents of the study participants. A total of 100 obese study participants were selected between 8 to 14 years age group. Date of birth was considered to obtain chronological age. Demirjian's method was used to assess dental age. Bjork, Grave, and Brown's method was followed to detect bone age using hand-wrist radiograph. The comparison of three ages was done using the unpaired Student's t-test and Pearson's correlation coefficient. RESULTS: Dental age and bone age were advanced in comparison to chronological age in both sexes and its statistically significant (P < 0.001). There was a positive correlationship between three ages in both sexes. CONCLUSION: As per our study, dental age and bone age were advanced in obese children, but dental age was more advanced. Dental age and bone age can be considered as variables for diagnosing the impact of growth in obese children. In the future, further studies are required to support our findings.
ABSTRACT
AIMS AND OBJECTIVES: Attainment of ideal occlusion is often restricted by disproportionate sizes of individual teeth, which is otherwise termed as tooth size discrepancy (TSD). While extraction of teeth for orthodontic purposes is not uncommon, there is considerable resistance against this school of thought. The extraction of premolars, in particular, received considerable attention because of the potential TSD that could result following the extraction of premolars. The aim of the present study was to identify the consequence of premolar extractions on Bolton's overall ratios in South Indian population. MATERIALS AND METHODS: One hundred participants were recruited into the study through purposive nonproportionate quota sampling. Pretreatment dental casts of the study participants were measured for mesiodistal tooth widths to determine Bolton's overall ratio before the hypothetical tooth extractions were performed. The hypothetical extractions were executed in four different combinations as follows: (a) Maxillary and mandibular first premolars, (b) maxillary first premolars and mandibular second premolars, (c) maxillary second premolars and mandibular first premolars, and (d) maxillary and mandibular second premolars. Bolton's overall ratios were calculated after the hypothetical tooth extractions were performed. Statistical analysis was done using the Statistical Package for the Social Sciences, version 20 software. RESULTS: It was observed that extractions performed in any of the combinations followed in this study resulted in a decrease of overall Bolton's ratios. However, the discrepancy in tooth size was highest with the extraction of all first premolars, whereas least discrepancy was recorded with all second premolars extraction. It was also found that, based on the combination of teeth chosen for extraction, there was significant difference in Bolton's overall ratios between males and females. CONCLUSION: In formulating a treatment plan involving premolar extraction, significant tooth size discrepancies could change mutually after extraction.