Aim and objective: The aim of this study was to compare the cephalometric measurements using Nemoceph software with manual tracings. Materials and methods: The sample consisted of 60 lateral Cephalometric radiographs of patients randomly selected from the existing records of patients of
<strong>Background:</strong>T loops are most commonly used in space closure in Orthodontics hence the comparative force and moments were determined using both the methods Objectives: To determine and compare moments and forces generated by T loop spring using software and manual spring testing method.<p><strong>Materials&Methods:</strong> Using the Loop software program (dHal, orthodontic loop simulator 1.7.0.0) force and moment and their ratios were calculated at various positions and for various activations for a standard design of T loop (.017 × .025 TMA) given by Kuhlberg&Burstone. The values were then compared with the corresponding values determined by manual spring tester method. Statistical analysis was done using Independent t-test and multivariate regression analysis.</p><p><strong>Results:</strong> The results showed that the alpha/beta moment ratio was dependant only on the spring position and independent of spring activation. The force system produced by a spring placed 1 mm closer to alpha attachment with 3.5 mm activation provided for bodily movement of anterior segment with M/F ratio of 9.7. This was lesser than that determined by spring tester by 0.7 for same amount of activation and same position.</p><p><strong>Conclusion:</strong> The comparison of the two methods for designing T loop showed statistically insignificant differences in M/F values. The loop software provided for good simulation of T loop design similar to manual method. The values determined by software and manual methods were highly correlated.</p>
Objectives: This study was undertaken to evaluate the distalization efficacy of four different intraoral assemblies namely: Jones jig, Lokar distalizer, Distal Jet and Samarium Cobalt magnets. Materials and methods: The present study was conducted on maxillary arches of 10 patients of either sex, within the age group of 10 to 14 years, requiring orthodontic therapy. The sample was then divided into two groups: Five subjects (group A) were given Distal Jet on right side and Jones Jig on left side, five subjects (group B) were given Lokar distalizer on right side and Samarium Cobalt magnet on left side. Cephalometric and model analysis were used to measure skeletal and dental changes. Results: In all the patients, a class I or super class I relationship was obtained within a mean time of 14.2 weeks. The overall mean distalization and distal tipping brought about by the Lokar distalizer was the maximum compared to the other systems. The magnets exhibited the least amount of distalization and the Distal jet produced the least amount of tipping. Conclusion: On a comparative basis, the palatally acting Distal Jet proved its supremacy over the buccal assemblies because the force was directed closer to the center of the resistance of the tooth. Further, the NiTi open coil spring-based systems displayed more amount of distalization than the Magnet-based system.
Rotation correction is challenging in lingual orthodontics due to shorter interbracket distance. Smith's rotation tie is one of the means to derotate anterior teeth. Here, we have described a case report of a 22-year-old female, who was undertaking orthodontic treatment with lingual technique, in which canine was derotated using modified Smith's rotation tie.
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