BackgroundThe study aimed to evaluate and compare the stress distribution and 3-dimensional displacements along the craniofacial sutures in between the Rapid maxillary Expansion (RME) and Implant supported RME (I-RME).MethodsFinite element model of the skull and the implants were created using ANSYS software. The finite element model thus built composed of 537692 elements and 115694 nodes in RME model & 543078 elements and 117948 nodes with implants model. The forces were applied on the palatal surface of the posterior teeth to cause 5mm of transverse displacement on either side of the palatal halves, making it a total of 10mm. The stresses and the displacement values were obtained and interpreted.ResultsVarying pattern of stress and the displacements with both positive and negative values were seen. The maximum displacement was seen in the case of plain RME model and that too at Pterygomaxillary suture and Mid-palatal suture in descending order. In the case of I-RME maximum displacement was seen at Zygomaticomaxillary suture followed by Pterygomaxillary suture. The displacements produced in all the three planes of space for the plain RME model were greater in comparison to the Implant Supported RME model. And the stresses remained high for all the sutures in case of an I-RME.ConclusionsThere is a definite difference in the stress and the displacement pattern produced by RME and I-RME model and each can be used according to the need of the patient. The stresses generated in case of conventional RME were considerably less than that of the I-RME for all the sutures.

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A bstract Aims and objectives This research aimed to determine the predictability and variability of the Yen angle and Mount Vernon Index (MVI) in relation to the other four sagittal discrepancy parameters, as well as to evaluate and explain any correlations that exist. The Lateral Cephalograms of 100 Class I Indian participants aged 17–24 years were recorded. The lateral cephalograms were traced for six distinct AP characteristics, including ANB, Wits appraisal, facial convexity, and beta angle, Yen angle, and MVI. The gathered data were evaluated statistically using S.P.S.S. version 10. To determine the difference between males and females, an independent “ t ” test was used. The coefficient of variability and correlation methods were used to determine the correctness of the Yen angle and MVI, as well as the association between the variables. Results The results of this study indicate that the most predictable and highly dependable parameter was the Yen angle (CV = 5.63), followed by the beta angle (5.63), the MVI (CV = 13.6), the ANB, Rickett's analysis, and Wit's analysis. Throughout all five analyses, the most statistically significant positive association between the MVI and the BETA angle was determined. Conclusion The derived inferences from the study included the high reliability of the yen angle for assessing the AP skeletal patterns of a patient, followed by the beta angle and MVI. How to cite this article Doshi JR, Jain P, Jain M, et al. Mount Vernon Index vs Yen Angle for Assessment of Anteroposterior Apical Jaw Base Relationship. Int J Clin Pediatr Dent 2021;14(S-1):S35–S38.

Introduction: Crowding is one of the popular complaints for undergoing treatment so far. The individual who has crowded teeth not only suffers from the unaesthetic appearance, but also with the functional deficiencies in form improper cleaning and gum related problems. Orthodontics is a boon for such people and with the advent of technological break through the correction of crowding is possible within no time with less pain and more comfort. Case Presentation: A 13-year-old male patient presented himself with the chief compliant of irregularly placed in the upper and lower front teeth. On examination, he had a convex profile with retrognathic mandible, posterior divergence. The intra oral examination revealed angle's class I malocclusion with 4mm overjet and 5 mm of over bite. The upper anteriors were moderately crowded and the lower anteriors were severely crowded with an in-standing left lateral incisor. Lower dental midline was shifted to the left by 3mm. Discussion: The article shows the effective non extraction management of crowding case using self-ligating bracket system which otherwise with conventional bracket system would have been difficult to treat with the non-extraction treatment modality

For many years, orthodontists have ligated brackets with wire or elastomeric ties. Much of our treatment planning and mechanics have been dictated by a mechanical system incorporating significant amounts of friction. This article will present a nearly friction free system using high-tech brackets and wires, which is claimed to reduce the need for auxiliary expanders significantly. Clinical Relevance: Self-ligation systems have the advantage of low friction mechanics; this may produce significant expansion in the premolar and molar regions. In addition, very low forces for orthodontic tooth movement are applied when compared to conventional brackets.

Skeletal class II malocclusion is best treated by growth modification using the myofunctional appliances or the orthopedic appliances or the combination of the both depending upon the type of malocclusion encountered during the growth period of an individual. Though all myofunctional appliances work on the same principle with few basic differences; the orthodontist has to make a choice among the plethora of the appliances at his disposal. The present article is a case report of class II malocclusion treatment using the Bass appliance for the growth modification, which was followed by fixed appliance for the occlusal detailing.

AimsTo determine the hard tissue surgical cephalometric norms statistically and geometrically in well-balanced faces having clinically acceptable facial profile in the Rajasthan population. To compare the cephalometric analyses of Rajasthanis males and females and to compare the craniofacial pattern of Rajasthani population with Caucasian norms.Materials and Methods:Lateral cephalograms of 200 subjects (100 males and 100 females) in the age group of 18–25 years, class I malocclusion and acceptable facial profile were obtained. Cephalometric analysis was performed and studied.Results:The study revealed that parameters, such as all horizontal skeletal parameters, PNS-N, PNS-ANS, Ar-Go, Go-Pg and upper OP to HP angle show no statistical significant difference between Rajasthani males and females. When comparing Rajasthani males and Caucasian males, the study suggested statistically significant difference in the mean values of parameters, such as PTM-N, L1-MP, 6-MP, Go-Pog, B-Pog, Ar-Go-Gn, U1 to NF and L1 to MP. When comparing Rajasthani females and Caucasian females, the study revealed no statistically significant difference between the mean values of parameters, such as N-A-Pg, N-A, N-B, L1-MP, Ar-Go-Gn, upper OP to HP angle and AB-OP and rest of the parameters showed highly significant difference between Caucasian females and Rajasthani females.Conclusion:This study indicates that Rajasthani population has a bimaxillary protrusion with predominant tendency toward horizontal growth pattern of the mandible and this tendency is further exaggerated in females. Rajasthani females also showed an increased length of the anterior cranial base, maxilla and mandible and in dental parameters they showed increased maxillary dental height and both Males and females showed decreased mandibular dental height.