Activiteit

Various techniques have been employed to enhance the root canal disinfection rate using sodium hypochlorite (NaOCl) as an irrigant. Photon initiated photo-acoustic streaming using lasers is a newer method of endodontic disinfection.

The aim of this study is to evaluate and compare the efficacy of photo-initiated photoacoustic streaming and conventional irrigation technique using 2.5% NaOCl for root canal disinfection in primary teeth.

Laboratory setting and

design.

Twenty extracted primary teeth were selected in which

incubation was done in the root canals and bacterial counts were obtained before the intervention. The teeth were randomly allocated into two groups. Group I samples were irrigated with conventional syringe method using 2.5% NaOCl and Group II samples were irrigated using photon-initiated photo-acoustic streaming method with erbium-doped yttrium aluminum garnet laser (wavelength – 2940 nm). Postintervention samples were obtained, and bacterial colony count was done. Wilcoxon Signed- Ranks Test and Mann-Whitney test were applied to test the intragroup and intergroup differences in the bacterial counts.

Postintervention results showed no bacterial growth in the canals irrigated using Laser (

= 0.004) whereas, fewer bacterial colonies were observed in NaOCl group (

= 0.005). There was statistically significantly higher reduction in

counts in Laser Activated irrigation (LAI) group compared to NaOCl group (

< 0.05).

Total elimination of

counts was obtained by the use of laser activated NaOCl irrigation in the infected root canals, hence, it can be considered as an effective method for pediatric endodontic disinfection.

Total elimination of E. faecalis counts was obtained by the use of laser activated NaOCl irrigation in the infected root canals, hence, it can be considered as an effective method for pediatric endodontic disinfection.

Oral squamous cell carcinoma is usually preceded by potentially malignant disorders (PMDs), the most common being oral leukoplakia. A conservative management protocol is followed for milder dysplastic cases, while severe dysplastic lesions are surgically excised. Several classification systems have been developed based mainly on histopathological features with a lot of inter-observer variations. check details The present study was done to assess the use of immunohistochemical (IHC) markers in grading leukoplakic lesions in addition to histopathological grading.

To grade leukoplakia using different grading systems and assess if IHC markers can aid in categorizing leukoplakia.

Thirty-five cases of leukoplakia were graded using Ljubljana, 2005 World Health Organization (WHO), and Binary System followed by IHC staining with p63 and CD31.

Variation was noted in 12 cases while using WHO, 11 using Ljubljana, and 7 using Binary System and was significant on Cohen-Kappa statistics, with the least significant variation notedcol.

The aim of this study was to compare the osteogenic potential of conventional glass-ionomer cement (GIC) with chitosan-modified GIC (CH-GIC) and bioactive glass-modified GIC (BAG-GIC) as a function of time in varying proportions.

CH-GIC was prepared by adding 10 v/v% (Group II) and 50 v/v% (Group III) CH to the commercial liquid of GIC. BAG-GIC was prepared by the addition of 10 wt% (Group IV) and 30 wt% (Group V) of BAG to the GIC powder. Conventional GIC was kept as Group I. Nine round-shaped samples measuring 2 mm thick and 5 mm in diameter were prepared for every experimental material. Human osteosarcoma cells were cultured and cell proliferation was assessed at 24, 48, and 72 h using 3-(4,5-dimethylthiazol-2-yl)- 2,5-diphenyltetrazolium bromide (MTT) assay, and cell differentiation was assessed at 7,14, and 21 days using alkaline phosphatase (ALP) assay. All experiments were done in triplicate. The data obtained were analyzed using one-way analysis of variance and Tukey honestly significant difference

multiple comparisons at 0.05 level significance.

Cell culture studies showed a significant increase in proliferative activity and ALP activity in Group II, III, IV, and V than Group I at all-time intervals (

< 0.05). There was no statistically significant difference in osteogenic potential between CH-GIC and BAG-GIC groups.

The osteogenic potential was significantly higher in CH-GIC and BAG-GIC compared to conventional GIC.

The osteogenic potential was significantly higher in CH-GIC and BAG-GIC compared to conventional GIC.

In order to reduce the fear and anxiety of injection during root canal procedures, Madajet injection technique was substituted for the first time among the adult patients to obtain its efficacy and to overcome the painful procedure during the conventional syringe technique.

The aim of this study is to compare the clinical efficacy and level of patient acceptance of jet injections with conventional syringe technique in patients with symptomatic pulpitis.

Seventy patients were randomly divided into needleless pressure injection technique using Madajet XL and conventional syringe technique. The onset of anesthesia was evaluated using the electric pulp tester, and the pain was assessed using the Visual Analog Scale scoring criteria.

The obtained data were tabulated and subjected to the statistical analysis using the Chi-square test.

Needleless pressure injection technique (Madajet XL) proves to be effective in patients with symptomatic irreversible pulpitis during endodontic procedure.

It can be concluded that the needle-less pressure injection technique (Madajet XL) promises to be a viable mode of pain control during endodontic procedures as it converts the solution to a tiny droplet which is then carried by the myelin sheath.

It can be concluded that the needle-less pressure injection technique (Madajet XL) promises to be a viable mode of pain control during endodontic procedures as it converts the solution to a tiny droplet which is then carried by the myelin sheath.

An ideal composite resin should demonstrate smooth surface after polishing and high hardness value to provide long-term success. Thus, this study aimed to compare the surface roughness and microhardness of new experimental zirconia-reinforced rice husk nanohybrid composite (Zr-Hybrid) with commercialized nanofilled (Filtek-Z350-XT) and microhybrid composite (Zmack-Comp) resins before and after artificial ageing.

One hundred and eighty standardized disc samples were prepared, of which ninety samples each were used for surface roughness and microhardness test, respectively. They were divided equally into Group 1 (Filtek-Z350-XT), Group 2 (Zmack-Comp), and Group 3 (Zr-Hybrid). For surface roughness test, all samples were polished with aluminium oxide discs and further subdivided into aged and unaged subgroups, in which composite samples in aged subgroups were subjected to 2500 thermal cycles. Next, all the samples were subjected to surface roughness test using a contact stylus profilometer. As for microhardness test, all the aged and unaged samples were tested using a Vickers hardness machine with a load of 300 kgf for 10 s and viewed under a digital microscope to obtain microhardness value.