Introduction: Various anthropometric measurements have been used to determine the size of maxillary anterior teeth. However, which anthropometric measurement is the most reliable indicator to determine the width of maxillary anterior teeth remains unclear. Aims and objectives:To evaluate which anthropometric measurement is the most reliable indicator in determining the width of maxillary anterior teeth. Materials and methods:An electronic search was conducted for scholarly articles discussing various anthropometric measurements used for determination of width of maxillary anterior teeth, written in English or translated into English listed with PubMed, Cochrane Library, ScienceDirect, Wiley Online Library, and Google scholar databases. The search strategy yielded 119 articles. Out of them, 70 were excluded following reading of abstract, and 49 were selected for full-text reading. Of these, 21 were excluded based on exclusion criteria. Finally, 28 articles were included for final search. Due to heterogenicity of studies, a meta-analysis was not performed.

Prosthetic rehabilitation is done to regain function, speech and esthetics. This article describes the treatment for an acromegaly patient with bony defect. Two piece magnet retained hollow lip bumper prosthesis was fabricated to reduce the weight of the denture and to attain esthetics.

Herein, we report the electrochemical sensing of H2O2 in milk samples using an activated glassy carbon electrode (GCE). For this purpose, activation of GCE was carried out in 0.1 M H2SO4 by continuous potential sweeping between -0.7 to 1.8 V for 25 cycles. The activated glassy carbon electrode (AGCE) showed a redox peak at 0.1 V in the neutral medium corresponding to the quinone functional groups present on the electrode surface. The AGCE was studied in (pH 7.4) 0.1 M PBS for the electro-catalysis of H2O2. The surface of the activated electrode was analyzed by Raman spectroscopy and contact angle measurements. In addition, for the activated surface, the contact angle was found to be 85º which indicated the hydrophilic nature of the surface. The different optimization parameters such as effect of electrolyte ions, electrooxidation cycles, and oxidation potential windows were studied to improve the activation process. Finally, AGCE was used to detect H2O2 from 0.1 to 10 mM and the limit of detection was found to be 0.053 mM with a linear correlation coefficient of 0.9633. The selectivity of the sensor towards H2O2 was carried out in the presence of other interferents.

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Background: Intraoral scanner (IOS) is a medical device used for capturing direct optical impressions and composed of a handheld camera (hardware), a computer and software. Digital impressions by intraoral scanning have become an increasingly popular alternative to conventional impressions. The aim of this systematic review is to assess the studies regarding the various available technologies for IOS and evaluate the most accurate IOS system for cases with multiple implants and identify the factors that can influence its accuracy. Materials and Methods: A comprehensive electronic search was done in online databases, 'Pubmed', 'Google Scholar' and 'Cochrane' based on pre-determined eligibility criteria. In-vitro studies, In-vivo studies and Randomized controlled trials assessing the accuracy of intra-oral scanner technology were selected after thorough screening. The search strategy covered all studies published until February 2019 and yielded a total of 11 articles out of which 8 studies were determined to fulfil the inclusion criteria and were selected for this review. Data extraction from the included studies was conducted by the primary author and reviewed by the second author. Results: The information collected included sample size and population, study design, intervention, scanning methods, comparisons and outcome measures. 5 out of 8 included studies compared the distance deviation of the acquired scans from the true values while the remaining 3 studies gave trueness and precision values as the outcome variables. A forest plot on scanner precision displayed slightly higher precision levels in the TRIOS scanner compared to the other intraoral scanners. Conclusion: Despite the limitations this study, it can be concluded that active wavefront sampling is more accurate than the other intraoral scanning technology employed by commercial scanners.

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Glucose is one of the most important monosaccharides found in the food, as a part of more complex structures, which is a primary energy source for the brain and body. Thus, the monitoring of glucose concentration is more important in food and biological samples in order to maintain a healthy lifestyle. Herein, an electrochemical glucose biosensor was fabricated by immobilization of glucose oxidase (GOX) onto poly(3,4-ethylenedioxythiophene):4-sulfocalix [4]arene (PEDOT:SCX)/MXene modified electrode. For this purpose, firstly, PEDOT was synthesized in the presence of SCX (counterion) by the chemical oxidative method. Secondly, MXene (a 2D layered material) was synthesized by using a high-temperature furnace under a nitrogen atmosphere. After that, PEDOT:SCX/MXene (1:1) dispersion was prepared by ultrasonication which was later utilized to prepare PEDOT:SCX/MXene hybrid film. A successful formation of PEDOT:SCX/MXene film was confirmed by HR-SEM, Fourier transform infrared (FT-IR), and Raman spectroscopies. Due to the biocompatibility nature, successful immobilization of GOX was carried out onto chitosan modified PEDOT:SCX/MXene/GCE. Moreover, the electrochemical properties of PEDOT:SCX/MXene/GOX/GCE was studied through cyclic voltammetry and amperometry methods. Interestingly, a stable redox peak of FAD-GOX was observed at a formal potential of –0.435 V on PEDOT:SCX/MXene/GOX/GCE which indicated a direct electron transfer between the enzyme and the electrode surface. PEDOT:SCX/MXene/GOX/GCE also exhibited a linear response against glucose concentrations in the linear range from 0.5 to 8 mM. The effect of pH, sensors reproducibility, and repeatability of the PEDOT:SCX/MXene/GOX/GCE sensor were studied. Finally, this new biosensor was successfully applied to detect glucose in commercial fruit juice sample with satisfactory recovery.

To know the effectiveness of a Game-Based Histopathology learning method.  To create a new Image oriented Game Based Histopathology slide reading method. To know the usefulness of the new method. To compare the conventional learning and game-based learning methods. Two groups of undergraduate students were tested with two different learning methods to identify pathology slide sections of four lesions. For each group, sixteen Undergraduate dental students were selected randomly. A game was created by using histopathology images of those four lesions, and circulated among the group one. The conventional method of slide reading was given to the group two. Both the group was tested for diagnosing the four pathology lesions through light microscopy spotter identification. Results were calculated accordingly. A questionnaire survey was done based on the pattern and pathology features oriented diagnostic capacity. Results of the questionnaire survey were also analyzed. Statistically, the results of both the two groups were analyzed. An Independent t-test was done and found out there was no significant difference between the two learning methods. The questionnaire survey revealed that the group learned through game-based pathology slide learning method learned the morphological features better than that of the conventional slide learning method. The image oriented game based pathology slide learning helps the undergraduate students to diagnose the pathology lesions with proper knowledge of morphological features than the conventional slide learning method, which is mainly pattern oriented. Though it is a very complicated procedure, the game based slide learning method is fun, creative and involves a majority of the student’s attention towards morphological features of any pathological lesions.