Solid Oxide Cell Electrode Nanocomposites Fabricated by Inkjet Printing Infiltration of Ceria Scaffolds

The enhancement of solid oxide cell (SOC) oxygen electrode performance through the generation of nanocomposite electrodes via infiltration using wet-chemistry processes has been widely studied in recent years. An efficient oxygen electrode consists of a porous backbone and an active catalyst, which should provide ionic conductivity, high catalytic activity and electronic conductivity. Inkjet printing is a versatile additive manufacturing technique, which can be used for reliable and homogeneous functionalization of SOC electrodes via infiltration for either small- or large-area devices. In this study, we implemented the utilization of an inkjet printer for the automatic functionalization of different gadolinium-doped ceria scaffolds, via infiltration with ethanol:water-based La1−xSrxCo1−yFeyO3−δ (LSCF) ink. Scaffolds based on commercial and mesoporous Gd-doped ceria (CGO) powders were used to demonstrate the versatility of inkjet printing as an infiltration technique. Using yttrium-stabilized zirconia (YSZ) commercial electrolytes, symmetrical LSCF/LSCF–CGO/YSZ/LSCF–CGO/LSCF cells were fabricated via infiltration and characterized by SEM-EDX, XRD and EIS. Microstructural analysis demonstrated the feasibility and reproducibility of the process. Electrochemical characterization lead to an ASR value of ≈1.2 Ω cm2 at 750 °C, in the case of nanosized rare earth-doped ceria scaffolds, with the electrode contributing ≈0.18 Ω cm2. These results demonstrate the feasibility of inkjet printing as an infiltration technique for SOC fabrication.

Systematic Review on White Spot Lesions Treatments

The difference in refractive index between the healthy enamel and the demineralized area generates a lesion with a milky white opaque appearance, clearly distinguishable from the surrounding healthy enamel. The aim of this systematic review is to evaluate if the infiltration technique is the most efficient treatment to resolve a white spot lesion when compared with remineralization and microabrasion techniques. The Population/Intervention/Comparison/Outcome question investigated: “in enamel WS lesion, the infiltration treatment compared to remineralization or microabrasion treatments is more or less effective in the camouflage effect?” The research was performed on electronic databases, including Ovid MEDLINE, PubMed, and web of science. The search was conducted up to April 1, 2020. The scientific search engines produced 324 results. Only 14 were screened after screening. Based on the articles analyzed in this systematic review, the resin infiltration technique seems to be the most effective and predictable treatment for the aesthetic resolution of WSLs.

EVALUATION OF SUCCESS OF RESIN INFILTRATION TECHNIQUE IN SUPERFICIAL PROXIMAL CARIOUS LESIONS OF POSTERIOR TEETH

Objective: To determine the effectiveness of resin infiltration technique in arresting superficial proximal carious lesions of posterior teeth. Study Design: Quasi experimental study. Place and Duration of Study: Operative dentistry department, de’ Montmorency College of Dentistry Lahore, from Oct 2018 to Mar 2019. Methodology: Meeting inclusion criteria were selected. Informed consent was obtained. After application of rubber dam; etchant gel was applied to superficial proximal carious lesions in these patients; water-rinsed and air-dried for 30 sec; resin was then infiltrated into each lesion. Patients were recalled after 6 months for follow up. Results: Total patients were 30 out of which 18 (60%) were males and 12 (40%) were females. Mean age of patients was 25.77 years ranging from 16-35 years. Success of resin infiltration technique in superficial proximal carious lesions in posterior teeth was 86.7% measured by bitewing radiograph taken on follow up after 6 months to see any progression of carious lesion. Conclusion: Resin infiltration was effective in 86.7% patients in arresting progress of superficial proximal carious lesions with no significant difference for age and gender. Hence it is suggested that resin infiltration being promising micro invasive approach should be considered in addition to non-operative and operative treatment approaches.

Comparison of the Effects of Articaine and Lidocaine Anesthetics on Blood Pressure after Maxillary Infiltration Technique: A Triple-Blind Randomized Clinical Trial

Background. Many dental procedures begin with local anesthesia. Subsequent increase in blood pressure in healthy individuals commonly occurs and may be affected by several factors such as mental and physical stress, painful stimuli, and action of catecholamines present in local anesthetic solutions. The aim of the present study is to compare the effects of 4% articaine with 1 : 100000 epinephrine and 2% lidocaine with 1 : 80000 epinephrine on blood pressure after maxillary infiltration technique. Materials and Methods. In this randomized clinical trial, 102 patients were randomly assigned into two groups. One group received 4% articaine with 1 : 100000 epinephrine and the other group received 2% lidocaine with 1 : 80000 epinephrine for local maxillary infiltration. Systolic and diastolic blood pressure of both groups was determined twice: once before anesthetic injection and once 10 minutes after injection. The data were statistically analyzed using descriptive statistics, Shapiro–Wilks test, Levene test, chi-square test, independent t-test, and paired t-test. Results. The mean systolic blood pressure after anesthetic injection in the articaine and lidocaine groups was 125.00 ± 5.67 and 123.16 ± 6.417 mmHg, respectively, showing no statistically significant difference ( p = 0.127 ). The mean diastolic blood pressure after injection was 85.02 ± 7.331 in the articaine group and 81.35 ± 12.815 mmHg in the lidocaine group. These values show no statistically significant difference ( p = 0.080 ). In both groups, the mean systolic and diastolic blood pressures have increased significantly ( p < 0.001 ). Conclusion. Articaine can be regarded as a suitable alternative for lidocaine for maxillary local infiltration, as no significant difference was observed between the effects of the two anesthetic solutions on blood pressure.

Efficacy of Anaesthesia Techniques in Periapical Diseased Tooth

Almost all minor oral surgical procedures can be performed effectively if patient is relaxed and comfortable. One of the contributing factor for patient comfort is effective pain control. This can be achieved pre and per-operatively by various local anaesthetic techniques. Infiltration techniques are commonly employed in all maxillary and mandibular teeth whereas mandibular posterior teeth requires a nerve block. In certain cases, these techniques fails or provide inadequate anaesthesia, for example, teeth associated with periapical pathology. Therefore, we conducted a study to determine effectiveness of infiltration and block techniques as well as when supplemented by intra-ligament injection for anaesthesia in periapical infected teeth. Keywords: anaesthesia, infiltration technique, block technique, intraligamental technique, periapical pathology.

Resin Infiltration Technique as Minimal Invasive Approach Towards Mild to Moderate Dental Fluorosis in an Adolescent: a Case Report

Dental fluorosis can be defined as a developmental condition that affects dental hard tissue, mainly enamel characterised with white or yellowish lesions due to excessive fluoride exposure. Fluorosis can have a major impact on the appearance, structure and shape of the tooth which posed a significant aesthetic concern to individuals having this condition. There are several treatments recommended in treating dental fluorosis depending on the severity of the disease itself ranging from tooth bleaching to prosthetic crowns in severe cases. This case report describes the use of resin infiltration technique on a patient with mild to moderate severity of dental fluorosis of the upper anterior teeth which produce an acceptable improvement of the appearance of the affected tooth. Resin infiltration technique in this case provided a conservative and inexpensive approach in treating mild to moderate dental fluorosis for the patient, improving the aesthetic without significant loss of tooth structure.