Impact of periodontal phenotype on the outcome of subgingival instrumentation in Stage II and III, Grade A and B periodontitis.

Background: The influence of periodontal phenotype (PP) has been documented in the outcomes of various surgical periodontal interventions such as crown lengthening, mucogingival surgery, implant restoration, and open flap debridement. Previous studies with smaller sample sizes have assessed the role of PP on the outcome of nonsurgical periodontal therapy with inconsistent results. Aim: The aim of the current interventional study is to estimate the influence of PP on the outcome of subgingival instrumentation in Stage II and III, Grade A and B periodontitis. Materials and Methods: Fifty-two patients (n = 27 thick PP and n = 25 thin PP) underwent subgingival instrumentation using ultrasonic scalers and curettes under local anesthesia in a single sitting, and periodontal parameters were recorded at baseline, 2, 4, and 6 months. The McNemar and Chi-square tests were applied for categorical data, whereas the Wilcoxon signed-rank test and Mann-Whitney U-test were applied for continuous data in intra- and intergroup comparisons, respectively. Results: Significantly better improvements in deeper pockets (>5 mm) with thick PP were observed. Loss of attachment was found in thin, bleeding on probing (BOP)-negative sites with an initial probing depth of ≤3 mm. However, BOP-positive sites belonging to both groups exhibited higher improvements in terms of clinical parameters. Conclusion: Probing depth, PP, and periodontal inflammation recorded in terms of BOP influence the gain in clinical attachment following subgingival instrumentation.

Reactive Gingival Hyperplasia Mimicking Pyogenic Granuloma: A Nonsurgical Management in Cerebral Palsy Patient.

Among the vast categorization of gingival lesions and overgrowths, the term "reactive hyperplastic lesions" is used to describe certain pathologies reactionary to underlying systemic conditions, local irritants, or trauma. It is emphasized in the literature that treatment planning for all such pathologies includes surgical excision by one means or another. However, an exception is to be made in cases where adhering to the conventional method can be very difficult but at the same time prove favorable for the patient. The present case report aims to showcase an unusual case of localized inflammatory gingival hyperplasia mimicking a reactive pyogenic granuloma in an 11-year-old boy with cerebral palsy. The management and the outcome miraculously favored the nonsurgical approach in dealing with such a gingival lesion. How to cite this article: Negi S, Singhal R, Kant K, et al. Reactive Gingival Hyperplasia Mimicking Pyogenic Granuloma: A Nonsurgical Management in Cerebral Palsy Patient. Int J Clin Pediatr Dent 2024;17(7):812-814.

Extracorporeal Blood Pump driven by a Novel Bearingless Split-Tooth Flux-Reversal Motor.

This paper describes a novel bearingless split tooth flux reversal motor with integrated centrifugal blood pump. This motor has a magnet-free rotor, and is capable of operating at up to 3000 rpm with up to 100 mNm torque. The motor also has 50 N radial force capability for centering the rotor. The motor rotor is 50 mm diameter, housed in a 170mm wide stator. The motor has a novel magnetic configuration wherein the force generation is independent of the rotor angle. This allows simple radial force generation using stator-fixed currents. The motor torque is generated using commutated two-phase currents. Finite element simulations are used to optimize the design in order to achieve sufficient radial force and motor torque, while minimizing cogging torque. The design also achieves an axial passive magnetic stiffness of 5.4 N/mm, which is the constraint on axial motions of the rotor. This paper includes mechanical design and fabrication details, as well as experimental closed loop levitation and speed control performance. With an integrated impeller, the rotor and the centrifugal pump are tested by pumping fluid in a closed circuit to obtain experimental pressure-flow curves with impeller-limited performance.

Polyamines: Rising stars against metal and metalloid toxicity.

Globally, metal/metalloid(s) soil contamination is a persistent issue that affects the atmosphere, soil, water and plant health in today's industrialised world. However, an overabundance of these transition ions promotes the excessive buildup of reactive oxygen species (ROS) and ion imbalance, which harms agricultural productivity. Plants employ several strategies to overcome their negative effects, including hyperaccumulation, tolerance, exclusion, and chelation with organic molecules. Polyamines (PAs) are the organic compounds that act as chelating agents and modulate various physiological, biochemical, and molecular processes under metal/metalloid(s) stress. Their catabolic products, including H2O2 and gamma amino butyric acid (GABA), are also crucial signalling molecules in abiotic stress situations, particularly under metal/metalloid(s) stress. In this review, we explained how PAs regulate genes and enzymes, particularly under metal/metalloid(s) stress with a specific focus on arsenic (As), boron (B), cadmium (Cd), chromium (Cr), and zinc (Zn). The PAs regulate various plant stress responses by crosstalking with other plant hormones, upregulating phytochelatin, and metallothionein synthesis, modulating stomatal closure and antioxidant capacity. This review presents valuable insights into how PAs use a variety of tactics to reduce the harmful effects of metal/metalloid(s) through multifaceted strategies.

A 6-DoF position sensor for bearingless slice motors.

This paper describes a position sensor with six degrees of freedom (DoF) measurement capability. This sensor is designed for the position sensing of the rotor in a bearingless slice motor to enable active control. The sensor is designed to fit entirely under the rotor and operates by accessing the rotor bottom surface only, enabling packaging of the pump on the top of the rotor. The sensor has two parts; both operate using eddy currents. One of these parts measures the two radial DoF of the rotor. The other part measures the axial, angular rotation and tip/tilt DoF. The sensor utilizes a conductive target fixed to the underside of the rotor. Motion of this target varies the magnetic fields which can then be measured by the sensor as variation in either induced voltage or inductance value. The design and fabrication of the sensor along with the signal processing methods are presented in detail. The radial position measurements are the most critical for active levitation due to the small working gaps in these DoF, hence a resolution of < 1.2 ​ µ m and bandwidth of 1 kHz is achieved. This paper also describes the closed-loop behavior of a bearingless motor using this sensor.

DISTRIBUTION OF RADON AND URANIUM LEVELS IN GROUNDWATER OF DISTRICT PALWAL, SOUTHERN HARYANA, INDIA.

Scintillation-detector-based SMART RnDuo (AQTEK System, India) and LED fluorimeter (Quantalase Instrument, India) were used for measurements of radon and uranium concentration in 54 groundwater samples collected from different locations in the Palwal district of Haryana (India). Radon in 26% and uranium in 54% of samples were found to be at higher levels than the maximum contamination limit (11 Bq l-1) for drinking water recommended by US Environmental Protection Agency and provisional guideline level (30 µg l-1) stated by World Health Organization.