Browsing by Author "Andric, Miroslav (20435687400)"

Chronic inflammatory processes in periapical tissues caused by etiological agents of endodontic origin lead to apical periodontitis. Apart from bacteria, two herpesviruses, Epstein-Barr virus (EBV) and Human cytomegalovirus (HCMV) are recognized as putative pathogens in apical periodontitis. Although previous reports suggest the involvement of EBV in the pathogenesis of apical periodontitis, its exact role in periapical bone resorption has not yet been fully elucidated. We hypothesize that EBV infection in apical periodontitis is capable of inducing periapical bone resorption via stimulation of reactive oxygen species (ROS) overproduction. Increased levels of ROS induce expression of receptor activator of nuclear factor kappa B (NF-κB) ligand (RANKL). RANKL binding to receptor activator of nuclear factor κB (RANK) present on the surface of preosteoclasts induces their maturation and activation which consequently leads to bone resorption. The potential benefit of antiviral and antioxidant-based therapies in periapical bone resorption treatment remains to be assessed. © 2016 Elsevier Ltd

Purpose of Review: This review describes the most recent findings on herpesviral infections and offers current concepts of herpesviral role in the pathogenesis of periapical periodontitis. Recent Findings: Thirty articles reported data on herpesviral infection in periapical periodontitis. Epstein-Barr virus and human cytomegalovirus are the most frequently detected herpesviruses in periapical samples. The main hypothesis postulates a bidirectional herpesviral-bacterial relationship in the etiopathogenesis of periapical periodontitis. A high heterogeneity of herpesviruses incidence was registered within the studies, in part, due to various methodological approaches used in laboratory testing, different inclusion criteria, study design, seroprevalence of herpesviruses, and sociodemographic characteristics of investigated populations. Summary: Herpesviruses have been shown to potentially impair local host defense in periapical tissue. Although it has been demonstrated that endodontic pathogenic bacteria are able to reactivate herpesviruses, further, in vitro studies should provide more data on herpesviruses as a factor in the pathogenesis of the periapical pathoses. It is, therefore, necessary to investigate potential benefits of antiviral therapy in well-designed controlled longitudinal studies. © 2018, Springer Nature Switzerland AG.

Purpose of Review: This review describes the most recent findings on herpesviral infections and offers current concepts of herpesviral role in the pathogenesis of periapical periodontitis. Recent Findings: Thirty articles reported data on herpesviral infection in periapical periodontitis. Epstein-Barr virus and human cytomegalovirus are the most frequently detected herpesviruses in periapical samples. The main hypothesis postulates a bidirectional herpesviral-bacterial relationship in the etiopathogenesis of periapical periodontitis. A high heterogeneity of herpesviruses incidence was registered within the studies, in part, due to various methodological approaches used in laboratory testing, different inclusion criteria, study design, seroprevalence of herpesviruses, and sociodemographic characteristics of investigated populations. Summary: Herpesviruses have been shown to potentially impair local host defense in periapical tissue. Although it has been demonstrated that endodontic pathogenic bacteria are able to reactivate herpesviruses, further, in vitro studies should provide more data on herpesviruses as a factor in the pathogenesis of the periapical pathoses. It is, therefore, necessary to investigate potential benefits of antiviral therapy in well-designed controlled longitudinal studies. © 2018, Springer Nature Switzerland AG.

Objective: To analyze radiographic predictors for lower third molar eruption among subjects with different anteroposterior skeletal relations and of different age groups. Materials and Methods: In total, 300 lower third molars were recorded on diagnostic digital orthopantomograms (DPTs) and lateral cephalograms (LCs). The radiographs were grouped according to sagittal intermaxillary angle (ANB), subject age, and level of lower third molar eruption. The DPT was used to analyze retromolar space, mesiodistal crown width, space/width ratio, third and second molar angulation (α, γ), third molar inclination (β), and gonion angle. The LC was used to determine ANB, angles of maxillar and mandibular prognathism (SNA, SNB), mandibular plane angle (SN/MP), and mandibular lengths. A logistic regression model was created using the statistically significant predictors. Results: The logistic regression analysis revealed a statistically significant impact of b angle and distance between gonion and gnathion (Go-Gn) on the level of lower third molar eruption (P < .001 and P < .015, respectively). The retromolar space was significantly increased in the adult subgroup for all skeletal classes. The lower third molar impaction rate was significantly higher in the adult subgroup with the Class II (62.3%) compared with Class III subjects (31.7%; P < .013). Conclusion: The most favorable values of linear and angular predictors of mandibular third molar eruption were measured in Class III subjects. For valid estimation of mandibular third molar eruption, certain linear and angular measures (β angle, Go-Gn), as well as the size of the retromolar space, need to be considered. © 2015 by The EH Angle Education and Research Foundation, Inc.

Background: Polymorphisms in genes encoding tumor necrosis factor-α (TNF-α) and its receptor TNF-R1 have been shown to affect one person's susceptibility to develop certain neoplastic diseases. The aim of the present association study was to investigate whether single nucleotide polymorphisms (SNPs) in TNF-α (−308G>A) and TNF-R1 (36A>G) genes modulate the susceptibility for keratocystic odontogenic tumors (KCOTs) development in Serbian patients. Methods: Genotyping was performed in 60 KCOT patients and 125 healthy individuals, using polymerase chain reaction/restriction fragment length polymorphism analysis. Results: A significant difference in genotype and allele frequencies was found between patients and controls for both SNPs (P < 0.05). Carriers of the TNF-α A variant had an eightfold increase of KCOT risk (OR = 8.12, 95% CI = 3.98–16.56, P < 0.0001), while carriers of the TNF-R1 G variant had approximately a fourfold increase of KCOT risk (OR=3.65, CI: 1.60–8.40, P = 0.001). Conclusions: Our findings suggest that the two polymorphisms are strong risk factors for KCOT development in Serbian population. © 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd

Background: Polymorphisms in genes encoding tumor necrosis factor-α (TNF-α) and its receptor TNF-R1 have been shown to affect one person's susceptibility to develop certain neoplastic diseases. The aim of the present association study was to investigate whether single nucleotide polymorphisms (SNPs) in TNF-α (−308G>A) and TNF-R1 (36A>G) genes modulate the susceptibility for keratocystic odontogenic tumors (KCOTs) development in Serbian patients. Methods: Genotyping was performed in 60 KCOT patients and 125 healthy individuals, using polymerase chain reaction/restriction fragment length polymorphism analysis. Results: A significant difference in genotype and allele frequencies was found between patients and controls for both SNPs (P < 0.05). Carriers of the TNF-α A variant had an eightfold increase of KCOT risk (OR = 8.12, 95% CI = 3.98–16.56, P < 0.0001), while carriers of the TNF-R1 G variant had approximately a fourfold increase of KCOT risk (OR=3.65, CI: 1.60–8.40, P = 0.001). Conclusions: Our findings suggest that the two polymorphisms are strong risk factors for KCOT development in Serbian population. © 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd