Sushmita Batni Rao

Abstract

A wide range of clinical procedures have been introduced and practiced to correct mesially inclined mandibular molars which is a common situation among young adults, occurring usually due to inadequate space in the arch for its eruption. There are two major treatment options available for the correction of impacted / partially impacted molars and this depends on several factors. The objective was to treat a 15-year-old male patient having a lower right partially impacted 2nd molar using skeletal anchorage system. The lower right 3 molar was surgically excised, and the partially impacted 2 molar was uprighted using an orthodontic miniscrew which was placed between lower right 1 and 2 premolars on the mesial side. The use of skeletal anchorage system has an excellent advantage over conventional methods since there is prevention of unwanted movement of anchor teeth leading to successful correction without any delay in the treatment duration.   Keywords: Partially impacted second molar, Skeletal anchorage system, Molar uprighting, Orthodontic miniscrew

Abstract

Objective: To evaluate the torque expression of right permanent maxillary central incisor with varying bracket positions and to compare the torque expression of the same tooth with different crown-root angulations. Settings and Sample Population: Finite Element Models of Maxillary Central Incisor were used for simulation of torque expression with various crown-root angles. Materials and Methods: Three FEM models of a Maxillary Central Incisor with different crown-root angles (170?,175?,180?, and 165°) were constructed with varying bracket heights and subjected to a 30° labial root torque and the resultant torque expressions were evaluated. Result: The model with the maximum variation in crown-root angle (165?) showed the maximum torque expression at 6mm and minimum at 3mm bracket height while the model with a minimum variation in crown-root angle (180°) showed the minimum torque expression both and 3mm and 6mm bracket height. Conclusion: With increase in the crown-root angles of a tooth, the torque expression away from the incisal edge increases.   Keywords: Maxillary Central Incisor, Crown­ Root Angle, Torque Expression, Finite element model

Abstract

Aim: The aim was to compile information through literature search to systematically review randomized controlled trials done to assess the effectiveness of resin infiltration for white spot lesions post orthodontic treatment. Materials and Methods: Published articles from various databases such as Cochrane, PubMed, Google Scholar and Embase were assessed for randomized clinical trials related to resin infiltration. Young adults and adolescents aged less than 30 years with presence of white spot lesions within 3-4 months after orthodontic treatment were considered for the study. Studies related to the effectiveness of the resin used and esthetics in terms of color masking were a part of this study. Results: A total of 4 studies complying with the inclusion and exclusion criteria were selected for the systematic review. Most studies showed that there was a significant improvement in the clinical appearance of the lesions and a reduction in their size after resin infiltration. The method of resin infiltration can be followed for achieving an aesthetic improvement of post-orthodontic white spot lesions. Conclusion: The ICON (Infiltration CONcept) is a technique which can be used as a form of a minimally invasive procedure for the treatment of early caries in patients of all ages. The advantage of this procedure includes minimum damage to the tooth structure due to the low viscosity of the resin.   Keywords: Resin Infiltration, ICON Concept, Orthodontic Treatment, White Spot Lesions, Systematic Review, Effectiveness

Abstract

Objective: To evaluate and compare the resultant stress on the root and PDL of a Maxillary Central Incisor with various crown-root angles. Settings and Sample Population: Finite Element Models of Maxillary Central Incisor were used for simulation of stress on the root and PDL. Materials and Methods: Three FEM models of a Maxillary Central Incisor with different crown-root angles (170?, 175? and 180?) were constructed and subjected to a force of 2N respectively. The resultant stress generated in the periodontal ligament and root surface were recorded and compared between the models. Result: The model with the maximum change in crown-root angle (180?) showed the maximum stress in both PDL and root surface. The stress recorded on the root surface was more on the cervical 2/3rd in the palatal region of the tooth as compared to the labial region. Maximum stress in the PDL was seen only in the cervical 3rd of the third model. Conclusion: With increase in the crown-root angles of a tooth, the stress in the PDL and on the root surface increases.   Keywords: Maxillary Central Incisor, Crown­ Root Angle, Finite Element

Abstract

Malocclusion is known to be multifactorial affecting a wide range of populations in many ways. It can have pernicious effects on the quality of life of an individual since it is associated with both aesthetic and functional matters. Crossbites, having been considered one of the most common malocclusions, also serves as a route for future problems. The objective was to treat a 22-year-old male patient who presented with a single tooth anterior and lingual crossbite. A non-extraction treatment followed by settling of occlusion which met the treatment plan was performed, delivering a corrected smile both functionally and aesthetically.   Keywords: Crossbite, Malocclusion, Fixed Appliance, NiTi Coil Spring