Evaluation of the Impact of Digital Dentistry on the Precision of Implant Placement and Prosthesis Fabrication: An In-Vitro Study.

BACKGROUND: Digital dentistry has revolutionized the field of implant dentistry, offering enhanced accuracy and precision in implant placement and prosthesis fabrication. This study aims to evaluate the effect of digital dentistry on the accuracy of implant placement and prosthesis fit through a comprehensive in-vitro assessment. METHODS: In this in-vitro study, a Digital Dentistry Group and a Conventional Group were compared regarding implant placement accuracy and prosthesis fit. Measurements of coronal deviation, apical deviation, global deviation, angulation deviation, and depth deviation were obtained for implant placement accuracy, while marginal fit and internal fit were assessed for prosthesis fit. Statistical analysis was performed to determine significant differences between the two groups. RESULTS: The Digital Dentistry Group demonstrated significantly lower values of coronal deviation, apical deviation, global deviation, angulation deviation, and depth deviation compared to the Conventional Group (p < 0.001). Similarly, the Digital Dentistry Group exhibited superior marginal fit and internal fit (p < 0.001) when compared to the Conventional Group. CONCLUSION: This in-vitro study provides evidence supporting the superior accuracy of implant placement and improved prosthesis fit achieved through digital dentistry techniques. The use of intraoral scanners, computer-aided design/computer-aided manufacturing (CAD/CAM) systems, and three-dimensional (3D) imaging enables precise digital impressions, virtual planning, and custom-made prostheses with superior fit and esthetics. Incorporating digital dentistry into clinical practice can enhance treatment outcomes and patient satisfaction in implant dentistry.

Maxillofacial rehabilitation of orbital rhabdomyosarcoma exenteration: A clinical report.

ABSTRACT: Maxillofacial rehabilitation of an orbital defect plays a crucial role in enhancing the esthetics of the facial defect. The eye is a vital organ, the loss of which requires a customized approach for post-defect rehabilitation. Advanced treatment option such as implant-supported orbital prosthesis has a superior outcome in terms of retention and esthetics, but due to economic factor, it is not affordable for all patients. This case report describes a simplified rehabilitation technique for a patient with an orbital defect where retention is achieved by spectacles and satisfactory esthetics are obtained.

Japanese Encephalitis: A Brief Review on Indian Perspectives.

INTRODUCTION: Japanese encephalitis (JE) is recently declared as a notifiable disease in India due to its expanding geographical distribution. The disease notification facilitates effective implementation of preventive measures and case management. EXPALANTION: JE is a vector-borne disease that can be prevented by vaccine administration. It is caused by Japanese encephalitis virus (JEV), belonging to family Flaviviridae. Amongst the known etiological viral encephalitis agents, it is one of the leading viral agents of acute encephalitis syndrome in many Asian countries where it is identified to cause substantial morbidity and mortality as well as disability. Globally, it is responsible for approximately 68,000 clinical cases every year. CONCLUSION: In the absence of antivirals, patients are given supportive treatment to relieve and stabilize. Amongst available control strategies; vector control is resource intensive while animal and human vaccination are the most effective tool against the disease. This review highlights recent progress focusing challenges with diagnosis and prophylactic interventions.

Multiple keratocysts of the mandible in association with Gorlin-Goltz syndrome: A rare case report.

Nevoid basal cell carcinoma syndrome is a syndrome with wide variety of manifestations ranging from oral lesions to skeletal deformities. It calls for due responsibility of maxillofacial surgeon to diagnose the syndrome because very often they are the first health professionals to see the patient for the treatment of keratocystic odontogenic tumor. Keratocystic odontogenic tumor has been the topic of numerous investigators, is known for its potentially aggressive behavior, significant rate of recurrences. KCOT often occurs as a solitary lesion, in some instances multiple keratocysts may occur in association with a syndrome called Gorlin-Goltz syndrome (nevoid BCC, jaw cyst bifid rib basal cell nevus syndrome). Here, we present a case of multiple keratocysts in the mandible in association with skeletal, ocular, cutaneous anomalies in the given clinical scenario, which has profound relevance in the clinical dental practice.

Evaluation of Japanese encephalitis virus polytope DNA vaccine candidate in BALB/c mice.

Vaccination is the most important measure available to control the spread of Japanese encephalitis virus. We have previously described the in silico design, in vitro and primary in vivo analyses of polytope construct (P-JEV). Present study indicates that, P-JEV induces significant specific humoral and cellular immune responses in BALB/c mice. Mice were immunized intra-dermally with 1µg plasmid DNA using gene gun and boosted twice. After the second booster, all the mice seroconverted and developed JEV neutralizing antibodies. Enhancement of post-challenge neutralizing antibody titres indicates the dominant role of anamnestic antibody-mediated protection in the mice JEV challenge model. Our study provides an insight demonstrating, intra-dermal DNA administration led to higher seroconversion rates and potentiated T(H)2 type of immune responses. The P-JEV construct is thus capable of generating protective neutralizing antibodies in mice and prime the immune system effectively against subsequent exposure to the virus.

Design and characterization of polytope construct with multiple B and TH epitopes of Japanese encephalitis virus.

Japanese encephalitis (JE) remains a major public health threat with vaccination as the only measure for its prevention. Epitope-based vaccination is a promising approach for achieving protective immunity and avoid immunopathology in Japanese encephalitis virus (JEV) infection due to flavivirus cross-reactivity. We have mapped B-cell epitopes from JEV envelope protein, responsible for elicitation of neutralizing antibodies. Incorporation of T helper (T(H)) epitopes, along with these, imparted protective immunity to the host. In the present study, based on in silico epitope selection we optimized and proposed a polytope DNA construct (P-JEV) consisting B-cell and T(H) epitopes from the JEV envelope (E) protein as well as non-structural protein-1 (NS1). The immunogenicity and protective efficacy of P-JEV was assessed by in vitro and in vivo experiments. The expressed P-JEV showed reactivity in in vitro assays with JEV monoclonal antibodies. Protective efficacy of P-JEV was assessed in BALB/c mice. Our findings indicate that P-JEV may be a candidate vaccine for the prevention of JEV infection.

Effect of Helicobacter pylori's vacuolating cytotoxin on the autophagy pathway in gastric epithelial cells.

Host cell responses to Helicobacter pylori infection are complex and incompletely understood. Here, we report that autophagy is induced within human-derived gastric epithelial cells (AGS) in response to H. pylori infection. These autophagosomes were distinct and different from the large vacuoles induced during H. pylori infection. Autophagosomes were detected by transmission electron microscopy, conversion of LC3-I to LC3-II, GFP-LC3 recruitment to autophagosomes, and depended on Atg5 and Atg12. The induction of autophagy depended on the vacuolating cytotoxin (VacA) and, moreover, VacA was sufficient to induce autophagosome formation. The channel-forming activity of VacA was necessary for inducing autophagy. Intracellular VacA partially co-localized with GFP-LC3, indicating that the toxin associates with autophagosomes. The inhibition of autophagy increased the stability of intracellular VacA, which in turn resulted in enhanced toxin-mediated cellular vacuolation. These findings suggest that the induction of autophagy by VacA may represent a host mechanism to limit toxin-induced cellular damage.

A study on reproducing silicone shade guide for maxillofacial prostheses matching Indian skin color.

AIM: The value and success of a well-fitting and anatomically correct prosthesis are compromised if the color does not match the adjoining tissues. The use of powder colors to help develop a simplified silicone shade guide to aid in the fabrication of silicone facial prostheses for Indian patients has been described here. MATERIALS AND METHODS: Ten powder pigments were used to fabricate the silicone samples for three different subjects having light, medium and dark complexions who were separated into three groups depending on the value of their shades. Four-step wedge silicone samples with thickness variations of 1, 2, 4 and 6mm were fabricated. Visual assessment of the samples was done by four evaluators to check the agreement of color match. Data was statistically analyzed using kappa coefficients. RESULTS: The kappa values were found to be 0.09-0.44 for a light skin tone, -0.11 to 0.77 for medium skin and 0.44 to 0.85 for dark skin tones. This study showed that the samples of dark skin tone matched the skin tone well and showed a statistically good agreement. To further test the validity of these shade guides, facial silicone veneers were fabricated for three patients having light, medium and dark complexion. The color matching showed satisfactory results. CONCLUSION: The silicone veneers matched the skin color of all three patients. Hence, this shade guide will help clinicians to obtain a good intrinsic shade and minimize extrinsic coloration.