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Odontogenesis is a complex process, which involves the molecular interaction between the epithelium and ectomesenchyme called as epithelium mesenchymal interaction (EMI). Reduced enamel epithelium (REE) after tooth formation protects enamel from coming in contact with adjacent ectomesenchyme. Also, REE acts as a source of origin for odontogenic lesions, during the process of development of a lesion, disruption in REE may occur and lead to formed enamel coming in contact with adjacent ectomesenchyme leading to the formation of cementum like calcifications. https://www.selleckchem.com/products/tertiapin-q.html REE may play a role in pathogenesis of hard tissue formation in odontogenic lesions. Is it possible that the irrigating solutions can have the potential to cause post-operative pain? Unfortunately, the current literature does not provide clear guidance. The purpose of this systematic review and meta-analysis was to comprehensively review two different irrigation solutions (sodium hypochlorite and chlorhexidine) regarding the post-operative pain after endodontic treatment. This study was prepared according to the Cochrane criteria for creating a systematic review and meta-analysis and confirms the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. This search was conducted in the PubMed/MEDLINE, SCOPUS and Cochrane Library databases until February 2018 to answer the In [(Population) what is the effect of (Intervention) on (Outcome), compared with (Comparison) Intervention] (PICO) question could sodium hypochlorite cause more post-operative pain than chlorhexidine in teeth subjected to endodontic treatment? The primary outcome was overall post-operative pain after 24 h. After applying the inclusion and exclusion criteria, three randomized clinical trials fulfilled the eligibility criteria, and two were subjected to the meta-analysis. There was no difference in post-operative pain between the tested irrigating solutions. There are few studies published in the current literature; therefore, additional randomized clinical studies are required to on this topic to help clinicians make the best decision concerning treatment. There are few studies published in the current literature; therefore, additional randomized clinical studies are required to on this topic to help clinicians make the best decision concerning treatment. Gap-free/continuous cement margins have been considered important for the longevity of indirect dental restorations. Bacterial species have demonstrated esterase-like activity that can cause biodegradation of resin composites. The aim of this study was to evaluate the effect of the esterase-like activity of E. faecalis and L. casei on three resin luting cements. In-vitro study materials and three resin luting cements tested were Variolink N, Rely X U200 and Panavia F2.0. E. faecalis and L. casei suspensions and supernatants were assessed for enzymatic activity by bacterial esterase activity assay. Circular samples of resin luting cements were exposed to suspensions of E. faecalis and L. casei for 7 and 28 days followed by testing for solubility, microhardness and bishydroxy propoxy phenyl propane (BisHPPP) release. E. faecalis and L. casei both demonstrated esterase-like activity. Bacterial suspensions had significantly increased enzymatic activity than supernatant solutions (P < 0.05). There was n 7 and 28 days of incubation. The aim of this study was to develop an alternative low-cost membrane for use in guided tissue regeneration (GTR). In vitro study. In this study, a membrane prepared from a 335 mm sized opening nylon substrate, covered in aqueous resin derived from chitosan, was compared with a commercial material, a non-degradable expanded poly (tetrafluoroethylene). Nylon substrate samples 2.0 × 2.0 cm were covered by aqueous resin based on diluted chitosan solution into 105 or 110 by spin coating technique to produce from 06, 10, and 15 layers. The surfaces of these membranes were observed using optical microscopy. The physical properties were measured by hydration superficial energy measurements (ΔG) and a tensile test machine. Statistical analysis was performed using the Student's t test at a significance level of 5%, using the BioEstat 2.0 program. The Δ G values of the nylon membrane covered by the 105 of chitosan with 15 layers were close to the commercial membrane's Δ G values. The tensile strength values of the nylon membrane covered by the 105 of chitosan with 15 layers were higher than the commercial membrane's (115.826 MPa, P < 0.05). Therefore, the membrane developed shows some favorable physical properties that could qualify it as a material candidate for use in guided tissue regeneration. Therefore, the membrane developed shows some favorable physical properties that could qualify it as a material candidate for use in guided tissue regeneration. The wire composite splint as a general rule is placed on the middle third of labial surface of the tooth. This is due to ease of application, better isolation, and fewer chances of contamination. However, these assumptions are opinion-based, with no scientific evidence to support them. In addition, to best of our knowledge no research has been carried out to evaluate the effect of position of wire splints on the mobility of the affected tooth and anchor teeth. The aim of this study was to evaluate the effect of the cervico-incisal position of splinting wire on the mobility of a replanted tooth and anchor teeth in a cadaveric model. Three cadavers (one female, 45 years old and two males, each 40 years old) were included in the study. periotest S was used to assess physiologic-tooth-mobility in three cadavers at baseline and after "extraction-replantation-wire-composite" splinting-protocol. Greatest splint effect for horizontal-mobility was found to be 9.33 ± 0.57 for Cadaver-I (incisal-third), whereas it was highest (3.66 ± 2.51) for vertical-mobility in Cadaver-II (cervical third). Middle third position of wire composite splint have lowest splint effect on both horizontal and vertical mobility of replanted teeth, thus rendering the most favorable position for the establishment of physiologic mobility. Middle third position of wire composite splint have lowest splint effect on both horizontal and vertical mobility of replanted teeth, thus rendering the most favorable position for the establishment of physiologic mobility.
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