Plexiform neurofibroma with nevus of ota-rare presentation.

Plexiform neurofibroma (PNF) is a rare form of neurofibromatosis type 1 which is rarely seen isolated. This generally spreads along the peripheral nerve and may affect some nervous rami. This is a poorly circumscribed and locally invasive tumor. About 21% of patients with NF-I are affected with PNFs. The nevus of Ota also called oculodermal melanocytosis is a macular discoloration of the face. It is most commonly found in the Japanese and very rare in the Indian subcontinent. It is unilateral oculodermal melanosis along the first two branches of the trigeminal nerve. We hereby present a very rare case of occurrence of isolated PNF (not associated with neurofibromatosis type 1) along with nevus of ota of the left side of the face in a 28-year-old female with thorough radiographic work up.

Platform switching technique and crestal bone loss around the dental implants: A systematic review.

Background: The overall success of dental implants depends on the crestal bone support around the implants. During the initial years of dental implant placement, the bone loss around the implants determines the success rate of treatment. Platform switching (PLS) concept preserves the crestal bone loss, and this approach should be applied clinically for the overall success of dental implants. Purpose: The purpose of this study is to discuss the literature dealing with the concept of PLS concept and preservation of marginal bone, the mechanism by which it contributes to maintenance of marginal bone, its clinical applications, advantages, and disadvantages, to assess its survival rates. Materials and Methods: PubMed and Google Scholar search was done to find out the studies involving PLS concept from 2005 to 2017. Data were analyzed using SPSS statistical software. Results: Literature search revealed studies involving concepts of PLS, comparison of platform-switched and nonplatform-switched implants, case reports on PLS, and studies with histological and finite element analyses regarding PLS. Conclusion: PLS helps preserve crestal bone around the implants, and this concept should be followed when clinical situations in implant placement permit.

RésuméContexte: Le succès global des implants dentaires dépend du support osseux crestal autour des implants. Au cours des premières années de la pose des implants dentaires, la perte osseuse autour des implants détermine le taux de réussite du traitement. Concept de commutation de plate-forme (PLS) préserve la perte osseuse crestale, et cette approche devrait être appliquée cliniquement pour le succès global des implants dentaires. But: le Le but de cette étude est de discuter de la littérature traitant du concept de concept PLS et de la préservation de l'os marginal, du mécanisme par lequel il contribue au maintien de l'os marginal, ses applications cliniques, ses avantages et ses inconvénients, pour évaluer ses taux de survie. Matériels et méthodes: La recherche PubMed et Google Scholar a été effectuée pour trouver les études impliquant le concept PLS de 2005 à 2017. Les données ont été analysées à l'aide du logiciel statistique SPSS. Résultats: La recherche documentaire a révélé des études impliquant des concepts de PLS, la comparaison de implants à commutation de plates-formes et à commutation de plates-formes, rapports de cas sur PLS et études avec analyses histologiques et d'éléments finis concernant PLS. Conclusion: PLS aide à préserver l'os crestal autour des implants, et ce concept doit être suivi lorsque des situations cliniques dans l'implant permis de placement.

Influence of Smile Arc and Buccal Corridors on Facial Attractiveness: A Cross-sectional Study.

INTRODUCTION: Two aspects of the smile: the Smile Arc (SA) and Buccal Corridors (BC) have been the interest of the orthodontist in recent years. AIM: The present study was undertaken to evaluate the influence of the smile arc and buccal corridors on facial attractiveness as evaluated by orthodontists, general dentists and laymen. MATERIALS AND METHODS: Two subjects (one male & one female) were selected from the regional population fulfilling the criteria of an ideal smile arc and ideal buccal corridors. Frontal smile view photographs of these subjects were taken and modified by using adobe photoshop 7.0 to create combination of three smile arc variance and three buccal corridors variations respectively which were shown to 25 orthodontists, 25 general dentists & 25 laymen, to rate the facial attractiveness of each image on a rating scale. RESULTS: All the three groups (laypersons, dentists and orthodontists) showed significant difference in ratings, indicating that they had different perceptions on the facial attractiveness. CONCLUSION: Orthodontists were more precise in discerning the smile arc and buccal corridors compared to dentists and laypersons.

Anticariogenic Activity of Black Tea - An Invivo Study.

INTRODUCTION: Teas is known for its anticariogenic properties and various mechanisms have been invoked to explain this effect. One such proposed mechanism is inhibition of salivary alpha amylase activity by endogenous tannins present in tea. AIM: The objective of the present study was to determine whether or not the ingestion of black tea decoction inhibits the enzyme salivary amylase and thus interferes with the release of maltose from intraoral entrapped particles of food. MATERIALS AND METHODS: A total of 30 children in the age group of 12 - 15 years were selected for the study. After two hours of fasting subjects consumed two salted crackers for 60 second following which they rinsed with water (control solution) and then with 1.5% black tea decoction (test solution) next day. Retained food particles were recovered from buccal aspect of left mandibular premolar and salivary amylase activity was noted via chromatography. Paired t-test was applied for statistical analysis. RESULTS: Maltose to Sucrose ratio was used to evaluate the result. The average ratio was 3.27 for control solution and 1.82 for test solution. The results were statistically highly significant (p <0.005). CONCLUSION: Tea inhibited the activity of salivary amylase and this inhibition assumes a special significance when it is considered that the effect of tea could be manifested over a prolonged period of time, as in a real life situation.

Assessment of objective and subjective measures as indicators for facial esthetics.

BACKGROUND: The study mentioned was aimed to examine the contribution of the objective measures representing anterior-posterior (AP) and vertical characteristics, dental esthetics, or their combination that are used in daily orthodontic practice in the assessment of the facial esthetics. MATERIALS AND METHODS: A panel of 64 laypersons evaluated the facial esthetics of 32 boys and 32 girls, stratified over four different angle classes, on a visual analog scale. The relationship between the objective parameters and facial esthetics was evaluated by the backward multiple regression analysis. RESULTS: Dental esthetics, expressed by the esthetic component of the index of orthodontic treatment need (AC/IOTN), appeared to be the most vital indicator for facial esthetics. The horizontal sum, a variable for AP characteristics of the patient, could be a better variable when compared with the overjet. CONCLUSION: Addition of this newly defined parameter to the AC/IOTN improved the prognostic value from 25% to 35%.

Inhibition of salivary amylase by black tea in high-caries and low-caries index children: A comparative in vivo study.

INTRODUCTION: Dental caries is a universal disease. Dietary modification is important in reducing the occurrence of dental caries. Tea which is so frequently consumed with cariogenic starch rich food is proposed to have anticariogenic potential. The various mechanism has been proposed for same and one being inhibition of salivary amylase activity. AIM: To determine the effect of 1.5% black tea decoction on salivary amylase activity in children with high caries and no caries. MATERIALS AND METHODS: A total of 30 children in the age group of 12-15 years were selected for the study. They were further grouped based on their decayed missing filled surface (DMFS) score into high-caries group (DMFS above 10) and no-caries group (DMFS = 0). After 2 h of fasting, subjects consumed two salted crackers for 60 s following which they rinsed with water and then with black tea decoction (1.5%) the very next day. Retained food particles were recovered salivary amylase activity was noted as maltose to sucrose ratio via chromatography. RESULTS: The average ratio of maltose to sucrose ratio percentage reduction in high-caries group was 43.63% and 41.17% in no caries group which was highly significant (P < 0.005) while the intergroup comparison was found statistically insignificant. CONCLUSIONS: Tea decoction has inhibitory effect on salivary amylase activity thus dental caries. The effect was statistically insignificant in children with high- and no-caries index.