Endodontically treated teeth may require posts for retaining the core and replacing the coronal structures that have been lost. The objective of this study was to evaluate and compare the push-out bond strength between different types of post cemented with different types of luting cement at different types of root level.

In this

study, a total of 48 single-rooted permanent human teeth were decoronated, and the roots were treated endodontically. Following post space preparation, the sample was divided into four groups (n= 12 each) based on the types of post and cement. Two different types of post [GC everStick

POST (ES) and Parapost

Fiber Lux

(PF)], and two different types of cement [G-CEM

(G), and RelyX

Unicem (R)] were used according to the manufacturer’s instructions. All roots were sectioned at the coronal and middle thirds with a thickness of 3±0.1mm. The Push-out bond strength (PBS) test was performed using a universal testing machine at a cross-head speed of 0.5mm/ min. The bond strengtyX

Unicem and G-CEM

cements.

The type of cement had a significant effect on push-out bond strength with RelyX

Unicem which had higher values than G-CEM

. However, the type of post and root level had no significant effect on PBS, although Parapost® Fiber Lux

and middle root level had higher values than their counterparts.

The type of cement had a significant effect on push-out bond strength with RelyXTM Unicem which had higher values than G-CEMTM. However, the type of post and root level had no significant effect on PBS, although Parapost® Fiber LuxTM and middle root level had higher values than their counterparts.

This study assessed the antibacterial activity of both separate and combined uses of 5.25% sodium hypochlorite (NaOCl), 2% chlorhexidine (CHX), 17% ethylenediaminetetraacetic acid (EDTA), 3% hydrogen peroxide (H

O

), MTAD, SmearClear (SC) and 13.8% chlorine dioxide (ClO

) irrigation solutions against

Two hundred eighty single rooted human premolars were randomly grouped into 26 test and 2 control (negative and positive) groups and were incubated for 24 h with

, except for the negative control group. The tested solutions were as follow NaOCl; CHX; ClO

; MTAD; SC; EDTA; H

O

; NaOCl + CHX; NaOCl + MTAD; SC + NaOCl; EDTA + NaOCl; H

O

+ NaOCl; ClO

+ CHX; CHX + MTAD; SC + CHX; EDTA + CHX; CHX + H

O

; ClO

+ MTAD; SC + ClO

; EDTA + ClO

; ClO

H

O

; SC+MTAD; EDTA+MTAD; MTAD + H

O

; SC + H

O

and EDTA + H

O

Optic density values were recorded at 0, 6, 12, 18, 24, 30, 36, 42 and 48 h and bacterial growth curve created for each solution.

The CHX, MTAD and ClO

showed a high potential for the elimination of

both alone and in all combinations. The EDTA, H

O

, H

O

+ EDTA, H

O

+ NaOCl and SC + NaOCl groups showed less antibacterial activity than the other groups. The SC + CHX group showed the best antibacterial effect against

.

The SC + CHX combination can be recommended as the most effective irrigation regimen against

in persistent endodontic infections.

The SC + CHX combination can be recommended as the most effective irrigation regimen against E. faecalis in persistent endodontic infections.

The aim of this study was to investigate whether genetic susceptibility to chronic periodontitis, conferred by the presence of the IL-6 -572GG genotype or the IL-10 -592A allele, influences the outcomes following a non-surgical periodontal therapy (NSPT)over a long period of time.

Thirty-seven chronic periodontitis patients were divided into two groups according to genotype as susceptible (SCP) and non-susceptible (NSCP). All subjects were clinically evaluated at baseline and 3 years following NSPT. Blood samples were collected at baseline from the individuals who fulfilled the inclusion criteria. All participants received NSPT from a single periodontist who was blind to the genotype status of each patient. A statistical analysis was performed by comparing the variables between groups using the Mann-Whitney U test and between baseline and 3 years for each group using the Wilcoxon test.

The mean age of the population was estimated to be 47.68±8.64 years and it included 51.4% females, 48.6% smokers, and 4nce of the IL-6 -572GG genotype or the IL-10 -592A allele showed similar treatment outcome following NSPT.

The aim was to investigate the efficacy of single injections of two different hyaluronic acid products, Flex Barrier and Revident, in reducing the size of black triangles to treat Nordland-Tarnow Class I and II recessions.

Forty adult patients were recruited with at least two upper and two lower interdental papilla defects in the front region between canine teeth. According to the Nordland-Tarnow classification of papillary defects, both Class I and Class II recessions were included in the investigation. Patients were randomly assigned to experimental groups to receive single injections of two different hyaluronic acid products, either Flex Barrier or Revident. The untreated sites served as controls. Photographs were taken before and immediately after the treatment, and again after one week and one month. To determine the size of the black triangles, Image J software was used. For statistical analysis, a mixed-design ANOVA was applied.

Both Flex Barrier and Revident significantly decreased the size of the treated defects immediately after the treatment and also one week later (p<0.001). The beneficial effect of Revident lasted longer than Flex Barrier as it remained significant even after one month in Revident-treated patients, however, not in the Flex Barrier-treated group. Furthermore, Nordland-Tarnow Class I lesions generally showed a greater improvement than Class II lesions.

In this proof-of-concept, randomized clinical trial we have demonstrated the clinical applicability of both Flex Barrier and Revident, although Revident gave longer-lasting improvements than Flex Barrier. Further trials are needed to optimize multiple-application protocols for treating gingival black triangles.

In this proof-of-concept, randomized clinical trial we have demonstrated the clinical applicability of both Flex Barrier and Revident, although Revident gave longer-lasting improvements than Flex Barrier. 2,3-Butanedione-2-monoxime clinical trial Further trials are needed to optimize multiple-application protocols for treating gingival black triangles.