Effect Of Chlorhexidine Gluconate Research Articles

Effect of Chlorhexidine Gluconate (0.2%), Combination (0.2% Chlorhexidine and 0.05% Sodium Fluoride), and Green Tea Extract (0.5%) Mouth Rinses on Colony Count Changes of Streptococcus mutans and Lactobacillus in Saliva – A Randomized Controlled Trial

Abstract Introduction Streptococcus mutans and Lactobacillus acidophilus are the well-known etiological factors for dental caries. Chlorhexidine (CHX) gluconate is the “gold-standard” antimicrobial agent but having adverse effects such as brown staining of the teeth and altered taste. Thus, there is a need for an alternative herbal product. Objective This study was done to compare the efficacy of CHX gluconate (0.2%) and combination (0.2% CHX and 0.05% sodium fluoride [NaF]) mouth rinses to that of green tea extract (0.5%) mouth rinse in reducing the salivary count of S. mutans and L. acidophilus in dental students. Materials and Methods The sample size of the study was 75 dental students with ≥4 decayed, missing, and filled teeth (DMFT) index. They were divided into three equal groups to test various mouth rinses against S. mutans and Lactobacillus. Unstimulated salivary samples were collected at baseline and postrinse (14 days) and tested for the colony-forming units of S. mutans and Lactobacillus. The Chi-square test was used to ascertain the demographic characteristics of the study population. One-way ANOVA statistics and paired t-test were applied to calculate the inferential statistics between the variables. The statistical constant was fixed at P < 0.05. Results The results of the study indicated that there was a statistically significant reduction in S. mutans and Lactobacilli count in all the three study groups. Conclusion Green tea mouth rinse can be a promising preventive therapy worldwide for the prevention of dental caries but CHX mouthwashes are superior in reduction of S. mutans and Lactobacillus.

Experimental study on the effect of chlorhexidine gluconate (CG)-induced atrial fibrillation on renal water and sodium metabolism

To construct an animal model of atrial fibrillation and observe the effect of acute atrial fibrillation on renal water and sodium metabolism in mice. A total of 20 C57 mice were randomly assigned to 2 groups (n = 10/group): control group (CON) and atrial fibrillation group (AF). The mice model of atrial fibrillation was induced by chlorhexidine gluconate (CG) in combination with transesophageal atrial spacing. The urine of the two groups of mice was collected, and then we calculate the urine volume and urine sodium content. The expression of TGF-β and type III collagen in the atrial myocardium of the two groups was detected by immunohistochemistry and Western Blot. The levels of CRP and IL-6 in blood were observed by ELISA, and the NF-κB, TGF-β, collagen type III, AQP2, AQP3, AQP4, ENaC-β, ENaC-γ, SGK1 and NKCC proteins in the kidneys of the two groups of mice was observed by Western Blot. Compared with CON, the expression of TGF-β and type III collagen in the atrial myocardium of the mice in AF were increased, the levels of CRP and IL-6 in the blood in AF were increased, and the renal NF-κB, TGF-β, type III collagen AQP2, AQP3, ENaC-β, ENaC-γ, SGK1 and NKCC protein expression in AF were up-regulated. The level of urine volume and urine sodium content in AF were significantly reduced. In the acute attack of atrial fibrillation, the formation of renal inflammatory response and fibrosis is activated, and the renal water and sodium metabolism is hindered, which is related to the up-regulated of the expressions of renal NKCC, ENaC and AQPs.

Effect of chlorhexidine gluconate as hemostatic agent in healing and repair after mineral trioxide aggregate vital pulp therapy in young permanent teeth – A clinical study

Objectives: The aim of the study was to evaluate the clinical success of mineral trioxide aggregate (MTA) partial pulpotomy as a definitive procedure in deeply carious permanent posterior teeth using 0.12% chlorhexidine (CHX) gluconate or normal saline as hemostatic agents. Materials and Methods: A pilot randomized control clinical trial was conducted on subjects with a deep carious lesion on 20 immature posterior teeth of subjects (10.8 ± 2.62 years). Caries and the superficial layer of exposed pulp were removed and then flushed with 0.12% CHX or saline solution. Gray MTA was placed, followed by resin-modified glass ionomer and composite. Results: 12 months follow-up showed 100% clinical and 90% radiographical success in both groups. Dentine Bridge was formed 90% in both the study and control group, which showed MTA partial pulpotomy is an effective procedure (P = 0.000). Conclusion: MTA partial pulpotomy using 0.12% CHX gluconate as a hemostatic agent for the treatment of deeply carious immature permanent posterior teeth appears to increase the radiographic rate of formation of dentin bridge as compared to the normal saline.

Effect of chlorhexidine gluconate on mechanical and anti-microbial properties of thermoplastic cassava starch

Antimicrobial thermoplastic starch (TPS) was developed using cassava starch, glycerol, and chlorhexidine gluconate (CHG) blend. CHG was added at concentrations of 1%, 5%, 10%, and 20% (wt./wt.) as an antimicrobial additive. The tensile strength and hardness of the blended samples increased with the chlorhexidine gluconate content, especially for 1% CHG. wt./wt. (12.6 MPa and 94, respectively). The TPS/CHG20 blend exhibited a large phase of CHG and recrystallization of TPS. The water solubility decreased with the addition of CHG. Nuclear magnetic resonance data confirmed a reaction between the hydroxyl groups of TPS and the amino groups of CHG. The TPS/CHG20% exhibited an inhibition zone for three bacterial types (Staphylococcus aureus, Escherichia coli, and Bacillus cereus) and three fungal types (Rhizopus oligosporus, Aspergillus oryzae, and Candida albicans). CHG acted simultaneously as a chain extender and an antimicrobial additive for TPS, improving its tensile strength, hardness, and anti-microbial properties.

PRE AND POST EXPOSURE ANALYSIS OF CHLORHEXIDINE GLUCONATE’S EFFECTIVENESS AGAINST BACTERIAL CONTAMINATION OF STETHOSCOPES

Objective: The present study is to assess the effectiveness of chlorhexidinegluconate as a disinfectant for the stethoscope diaphragm, to survey the routine practices followed by health care professionals (HCPs) towards stethoscope disinfection and to ascertain their general awareness on the matter.
 Methods: Questionnaire-based study conducted to assess the degree of awareness and attitude of HCPs towards stethoscope disinfection procedures. 200 responses were obtained and analyzed. Randomized, blind trial comparing bacterial load of stethoscope post-exposure to chlorhexidinegluconate vs. ethyl alcohol. The swabs collected from stethoscope diaphragm before and after exposure to disinfectant, were cultured using spread plate technique on nutrient agar. CFU count was compared.
 Results: Out of 200, nearly all HCPs part of this study were aware that stethoscopes could be linked to transmission of healthcare-associated infections (HCAIs) but only 78.5% (157) were accustomed to stethoscope disinfection practices. Although only 13.5% (27/200) of participants believed that chlorhexidinegluconate was effective, this study found it to be highly efficacious against bacterial recontamination.
 Conclusion: We stress upon the importance of regular disinfection of the stethoscope after each use and encourage frequent cleaning of the device with chlorhexidinegluconate, which may reduce bacterial recontamination for a longer period.

Influence of different restorative materials on the sensitivity of Streptococcus mutans biofilm to different antimicrobial mouthrinses in vitro

Objectives. The aim of this study was to assess the antibacterial effects of chlorhexidine gluconate, sodium fluoride, and sodium fluoride-xylitol combination mouthrinses on S. mutans biofilm, and most significantly, we aimed to compare different restorative materials regarding the sensitivity of S. mutans biofilms formed on their surfaces to the antibacterial effects of the tested mouthrinses. Materials and methods. Ten clinical isolates of S. mutans were used to form biofilms on specimens of four commercial restorative materials (resin composite, glass-inomer cement, amalgam, and stainless steel crowns); enamel specimens were used as controls. The adhesion of each of the ten isolates on the surface of each of the specimens was evaluated using viable count method and it was considered as the base level of adhesion to which the adhesion levels after the application of antibacterial mouthrinses (chlorhexidine gluconate 0.12%, sodium fluoride 0.05%, and sodium fluoride 0.05%- xylitol 25%) was compared. Results. Chlorhexidine gluconate 0.12%, sodium fluoride 0.05%, and sodium fluoride 0.05%-xylitol 25% combination exhibited statistically significant antibacterial effects on S. mutans biofilm. The addition of xylitol 25% to sodium fluoride 0.05% mouthrinse was associated with higher antibacterial effects compared with sodium fluoride alone, prominently for GIC and amalgam specimens. S. mutans biofilms formed on GIC specimens exhibited the highest sensitivity to antibacterial treatments, whereas biofilms formed on stainless steel specimens showed the lowest sensitivity. Conclusion. S. mutans biofilms formed on different restorative materials exhibited different sensitivity levels to antimicrobial mouthrinses.

Effects of a sub-minimum inhibitory concentration of chlorhexidine gluconate on the development of in vitro multi-species biofilms

Following antimicrobial administrations in oral environments, bacteria become exposed to a sub-minimum inhibitory concentration (sub-MIC), which can induce in vitro single-species biofilms. This study explored the effects of chlorhexidine gluconate (CHG) at a sub-MIC on in vitro multi-species biofilms comprising Streptococcus mutans, Streptococcus oralis and Actinomyces naeslundii. CHG at a sub-MIC was found to induce in vitro biofilm growth, although the bacterial growth was not significantly different from that in the control. The gene transcription related to S. mutans multi-species biofilm formation with CHG at a sub-MIC was significantly higher than that of the control, but this was not found in S. mutans single-species biofilms. The bio-volume of extracellular polysaccharides with CHG at a sub-MIC was significantly higher than that of the control. This suggests that CHG at a sub-MIC may promote the development of multi-species biofilms by affecting the gene transcription related to S. mutans biofilm formation.

Comparative Evaluation of the Effect of Chlorhexidine Gluconate, Raw Propolis and Hydrogen Peroxide on Dental Plaque and Gingival Inflammation

Background: Plaque is the soft deposit that forms the biofilm consisting of microorganisms adhering to the tooth surface and is proved beyond doubt to be the initiator of gingival and periodontal disease. Plaque control is the mainstay in periodontal disease.
 Aim: To compare the effect of 0.2% chlorhexidine gluconate, raw propolis and 3% hydrogen peroxide mouthwash on dental plaque and gingival inflammation.
 Materials and Methods: Thirty subjects in the age group of 20-40 years were enrolled in the study. Plaque index and Modified Gingival Index were recorded at baseline and oral prophylaxis was performed. Subjects were then randomly divided into three groups (n=10) and were asked to rinse with 10ml mouthwash twice daily for 15 days. Group I received 0.2% chlorhexidine gluconate mouth wash, Group II raw propolis diluted with distilled water (1:1), and Group III 3% hydrogen peroxide (1:1) mouthwash. Subjects were recalled on 7 day and 28 day for re-evaluation and recording plaque index and modified gingival index. Statistical analysis was done to evaluate the efficacy of all the three mouthwashes.
 Results: The results showed that all the three mouthwashes were effective in reducing plaque and gingival inflammation. Chlorhexidine gluconate 0.2% showed to be the most effective in reduction of dental plaque. Propolis was observed to be the most effective in reducing gingival inflammation over a period of 28 days.
 Conclusion: Propolis can be effectively used as a mouthwash without any potential side effects as an alternative to chlorhexidine mouthwash in reducing gingival inflammation.

Do ozone and boric acid affect microleakage in class V composite restorations?

ABSTRACTThe aim of this in vitro study was to evaluate the effects of chlorhexidine gluconate (2%), sodium hypochloride (2.5%), ozone gas, and boric acid at different concentrations (1%, 3%, 5%, and 7%) on microleakage from composite restorations.In a total of 80 extracted human canine teeth, a class V cavity was opened on the buccal surface and the samples were separated into eight groups. In the control group, no procedure was applied for cavity disinfection, then composite restoration (Z250, 3M) was made using single-stage, self-etch adhesive (Single Bond 3M). In the other groups, seven different disinfectants were used, then the cavity was restored. The teeth were split into two in the buccolingual direction, parallel to the long axes. Stain penetration was examined under stereomicroscope and scored. Examination with SEM was made on one sample from each group, selected at random. Statistical evaluations were made using Dunnett C Post Hoc Comparison and Kruskal–Wallis H tests.In the occlusal region evaluation, the groups with the lowest level of leakage were the 3% and 5% boric acid groups, and the highest levels of microleakage were determined in the chlorhexidine group and the 1% boric acid group. In the gingival region, the lowest level of microleakage was in the 5% boric acid group and the highest levels were determined in the 1% and 7% boric acid groups.Boric acid disinfectants used at suitable concentrations were not seen to create a risk in respect of microleakage.

PERBEDAAN EFEKTIVITAS CHLORHEXIDINE GLUKONAT 0,2% DENGAN TEH HIJAU (CAMELLIA SINENSIS) TERHADAP JUMLAH PORPHYROMONAS GINGIVALIS

Background: Periodontitis is a periodontal inflammation caused by plaque that contains pathogens, Porphyromonas gingivalis is one of them. Chlorhexidine therapy used to reduce the number of pathogenic bacteria causing periodontitis. Green tea contains polyphenols such as epigallocatechin-3-gallic as antibacterial agent that can kill the bacteria Porphyromonas gingivalis. This study aims to determine differences in the effectiveness of chlorhexidine gluconate 0.2% with green tea (Camellia sinensis) various concentrations to decrease the amount of bacteria Porphyromonas gingivalis.Method: This research was experimental with post test only design. Method used in antibacterial test was a drop plate misra. The experimental group consisted of six groups: chlorhexidine gluconate 0.2% and green tea group with a concentration of 100%, 75%, 50%, 25% and 12.5%. minimum bactericidal concentrations againts Porphyromonas gingivalis was evidenced by counting the number of colonies that formed on agar. Analysis data was using One Way ANOVA continued by Post hoc tests Tamhane.Result: The results showed that chlorhexidine gluconate 0.2% with green tea effective to decrease the amount of bacteria Porphyromonas gingivalis(ANOVA p <0.05). The results between the groups showed green tea 100%, 75% and 25%, have same effect compared to chlorhexidine gluconate 0.2% in reducing Porphyromonas gingivalis.Conclusion: In this experiment showed that chlorhexidine gluconate 0.2% and green tea extract 100%, 75%, 50%, 25% and 12.5% were able to decrease the amount of Porphyromonas gingivalis.

Effect of chlorhexidine gluconate on porosity and compressive strength of a glass ionomer cement

INTRODUCTION:For presenting wide antibacterial activity, chlorhexidine (CHX) has been extensively used in dentistry and can be easily incorporated into the glass ionomer cement (GIC) and consequently released into the oral cavity.AIM: The aim of this study was porosity and compression strength of a GIC, that was added to different concentrations of CHX.MATERIAL AND METHOD: Specimens were prepared with GIC (Ketac Molar Esaymix) and divided into 4 groups according to the concentration of CHX: control, 0.5% and 1% and 2% (n = 10). For analysis of pores specimens were fractured with the aid of hammer and chisel surgical, so that the fracture was performed in the center of the specimens, dividing it in half and images were obtained from a scanning electron microscope (SEM) analyzed in Image J software. The compressive strength test was conducted in a mechanical testing machine (EMIC - Equipment and Testing Systems Ltd., Joseph of the Pines, PR, Brazil). Statistical analysis was performed by ANOVA, Tukey test. Significance level of 5%.RESULT: No statistically significant changes between the study groups was observed both for the number of pores as well as for the compressive strength.CONCLUSION: The use of GIC associated with CHX gluconate 1% and 2% is the best option to be used in dental practice.

A Comparative In-Vivo Study on Persistent Effects of Chlorhexidine Gluconate in Alcohol Formulations and a Povidone-Iodine Solution as Skin Preparations

A Comparative In-Vivo Study on Persistent Effects of Chlorhexidine Gluconate in Alcohol Formulations and a Povidone-Iodine Solution as Skin Preparations

Chlorhexidine and tooth-brushing as prevention strategies in reducing ventilator-associated pneumonia rates

Ventilator-associated pneumonia (VAP) is a common complication of mechanical ventilation after endotracheal intubation. The role of chlorhexidine and tooth-brushing has been considered as a clinical intervention to reduce infection rates, however, evidence to inform this needs appraising. This paper presents a critical review on the effect of chlorhexidine gluconate (CHX) and tooth-brushing in decreasing rates of VAP in mechanically ventilated adult patients cared for in intensive care settings. A literature search was conducted using a number of bibliographic databases (n = 6). A number of parameters were used to exclude irrelevant papers. A total n = 17 papers were located and accessed, which were directly related to the field. Eight studies that met the criteria and addressed the study aims were reviewed. CHX was successful in reducing the rate of VAP and using a combination of CHX and colistine resulted in better oropharyngeal decontamination which reduced and delayed VAP. Chlorhexidine was also effective in reducing dental plaque in patients cared for in intensive care and had the potential to reduce nosocomial infections. Results of studies investigating the use of tooth-brushing in reducing VAP incidence proved inconsistent, although all recommend tooth-brushing as important in maintaining good oral hygiene. The use of chlorhexidine has been proven to be of some value in reducing VAP, although may be more effective when used with a solution which targets gram-negative bacteria. Tooth-brushing is recommended in providing a higher standard of oral care to mechanically ventilated patients and reducing VAP when used with chlorhexidine. However, limitations in study design and inconsistency in results suggest that further research is required into the effects of tooth-brushing.

Quantitative Estimation of Yeast on Maxillary Denture in Patients with Denture Stomatitis and the Effect of Chlorhexidine Gluconate in Reduction of Yeast

Quantitative Estimation of Yeast on Maxillary Denture in Patients with Denture Stomatitis and the Effect of Chlorhexidine Gluconate in Reduction of Yeast

THE EFFECT OF DISINFECTANT TO THERMOPLASTIC NYLON MATERIAL FLEXURAL STRENGTH

The oral health of denture wearers depends on the cleanliness of their denture. Therefore, it needs proper care and maintenance to prolong the denture wearing, while the mucosa is kept healthy. Maintenance and cleaning the denture by brushing and immersing in disinfectant solution is done to eliminate microorganisms. Thermoplastic nylon is widely used as material of choice in constructing partial or full denture instead of acrylic resin heat-cured material. This material is superior due to good esthetic, thinner denture base compared with acrylic resin denture base, and alternative material for patient allergic to acrylic monomer. Based on the findings, immersion in disinfectant solution for 24 hours can increase the rigidity of nylon denture base material. Refer to those, a research was done to discover the effect of chlorhexidine gluconate 0.2% and sodium hypochlorite 1% disinfectant solution to flexural strength of thermoplastic nylon material, bearing in mind that those solution are available abundantly in less price. In this research, it is concluded that flexural strength of thermoplastic nylon is increased in sodium hypochlorite 1% immersion compared to chlorhexidine gluconate 0.2%, aquades immersion, and control group. Flexural strength of thermoplastic nylon material in chlorhexidine gluconate 0.2% and aquadest immersion are relatively equal (p=1,000). Hereby disinfectant solution could affect to flexural strength of thermoplastic nylon material. Chlorhexidine gluconate 0.2% and aquadest immersion can decrease flexural strength compared to control group (p=0,000). Anticipation on physical, mechanical, and chemical changes of denture made from thermoplastic nylon material can change at immersion in sodium hypochlorite 1% and chlorhexidine gluconate 0.2% solution. To this matter, further research of other disinfectant solutions need to be done.

New approaches to prevention of staphylococcal infection in surgery

The present review describes the literature about the prevention of Staphylococcus aureus infections in surgery, published from August 2006 to January 2008, and puts it into perspective. To prevent Staphylococcus aureus infections after surgical procedures, three methods were described, that is, isolation precautions after methicillin-resistant Staphylococcus aureus screening, vancomycin as an antibiotic prophylaxis in patients at risk for methicillin-resistant Staphylococcus aureus, and topical decolonization of carriage. Identified methicillin-resistant Staphylococcus aureus carriers can be treated with the appropriate antibiotic prophylaxis to prevent infection with methicillin-resistant Staphylococcus aureus. Topical decolonization with chlorhexidine gluconate resulted in a reduced overall nosocomial infection rate, but no effect was found on the Staphylococcus aureus infection rate. Topical decolonization with mupirocin reduced the overall Staphylococcus aureus infection rate after surgery in Staphylococcus aureus nasal carriers. The treatment of proven carriers of Staphylococcus aureus with mupirocin is an effective method to prevent Staphylococcus aureus nosocomial infections after surgery. Cost-analysis studies show that this screen-and-treat approach is cost saving as long as the prevalence of mupirocin resistance in Staphylococcus aureus is low. The effect of chlorhexidine gluconate on the Staphylococcus aureus infection rate in carriers should be determined in future studies.

Chlorhexidine Gluconate: An Ideal Scolicidal Agent in the Treatment of Intraperitoneal Hydatidosis?

Hydatid disease is a parasitic disease that is treated primarily by surgery. The most important complication of surgical treatment is spillage of the contents of the cyst, leading to secondary dissemination. In this study, the effect of chlorhexidine gluconate (Chx-Glu) was investigated in the treatment of experimental intraperitoneal hydatidosis (IPH). IPH was reproduced in 100 Wistar albino rats by inoculation with 1 ml of a suspension contained approximately 1500 viable protoscolices of Echinococcus granulosus following determination of scolicidal activity of chlorhexidine gluconate in vitro. Five minutes after protoscolex inoculation, 5 ml of the scolicidal solution was instilled into the peritoneal cavity: 0.9% NaCl (control group), 4.0% Chx-Glu, 0.4% Chx-Glu, and 0.04% Chx-Glu. After 6 months of follow-up, the rats were sacrificed, and the number of isolated cysts, peroperative and postoperative deaths, and toxicity were evaluated. Cyst formation did not occur in any of the Chx-Glu groups compared to the control group (p < 0.05), whereas it was detected in all of the control rats. In addition, to 4.0% Chx-Glu was found to be more toxic and to cause a high mortality rate compared to the 0.4% and 0.04% Chx-Glu groups and the control group (p < 0.05). Chx-Glu 0.04% was found to be the most potent, nontoxic agent; it is easily available, inexpensive, and highly potent in a short period of time at the low concentration. Chx-Glu 0.04% can be used safely in the treatment of intraperitoneal hydatidosis and hydatid cyst.

The Effects of Chlorhexidine Gluconate (0.12%) on the Antimicrobial Properties of Tooth-Colored ProRoot Mineral Trioxide Aggregate

The purpose of this in vitro study was to determine whether the substitution of 0.12% chlorhexidine gluconate for sterile water as a mixing agent would enhance the antimicrobial activity of tooth-colored ProRoot mineral trioxide aggregate (MTA) against Actinomyces odontolyticus (ATCC17982), Fusobacterium nucleatum (ATCC2586), Streptococcus sanguis (ATCC10556), Enterococcus faecalis (ER3/2S), Escherichia coli (SM10lambdapir), Staphylococcus aureus (ATCC6538), Pseudomonas aeruginosa (UME), and Candida albicans (ATCC10261). Two wells of 5-mm diameter were made in triplicate agar plates inoculated with standardized suspensions of each microorganism. MTA (33 mg) mixed with chlorhexidine (12 microl) or sterile water (12 microl) was placed to fill each well. Plates were incubated at 37 degrees C as required for microbial growth. A blinded, independent observer measured zones of inhibition. All MTA samples inhibited microbial growth regardless of mixing agent. MTA/chlorhexidine showed significantly larger zones of inhibition (p < 0.0002, paired t test). In conclusion, substituting 0.12% chlorhexidine gluconate for water enhanced the antimicrobial activity of tooth-colored ProRoot MTA.

Effects of chlorhexidine, minocycline, and metronidazole on Porphyromonas gingivalis strain 381 in biofilms.

Porphyromonas gingivalis is found in subgingival biofilm and is associated with periodontal disease. Bacteria in biofilms are able to resist higher antimicrobial concentrations than in suspension. Little is known about the susceptibility of P. gingivalis in biofilms to antimicrobial agents. The effects of chlorhexidine gluconate, minocycline hydrochloride, and metronidazole on P. gingivalis biofilms were examined in vitro. P. gingivalis strain 381 biofilms were prepared on 32 hydroxyapatite disks. At 0, 24, 72, and 144 hours after perfusion of the three antimicrobial agents, two disks from each device were used to assess the antimicrobial effects by adenosine triphosphate (ATP) bioluminescence, and for morphological investigation by scanning electron microscopy (SEM). Close relationships were found between the results of the ATP analyses and the SEM observations in all groups examined. A significant decrease (P < 0.001) in ATP content was found between the chlorhexidine-treated and control groups. The extracellular matrix structure and P. gingivalis cells were altered in the presence of chlorhexidine. Minocycline hydrochloride also caused a decrease (P < 0.05) in the ATP content and morphological change on P. gingivalis biofilms. Metronidazole showed no significant efficacy against P. gingivalis biofilms. Chlorhexidine gluconate was effective at reducing the viability of P. gingivalis 381 cells in biofilms, while minocycline hydrochloride and metronidazole exhibited weaker effects.

The Effect of Chlorhexidine Gluconate as an Endodontic Irrigant on the Apical Seal: Long-term Results

The purpose of this study was to determine whether chlorhexidine gluconate (0.12%), used as an endodontic irrigating solution, would affect the apical seal of three root canal cements. One hundred, extracted, human, single-canal teeth were divided into 9 experimental groups of 10 teeth each, in addition to a positive and negative control group of 5 teeth each. The teeth were decoronated at the level of the CEJ, accessed, instrumented to a Master apical file #50, irrigated with either sterile saline, 5.25% NaOCl, or 0.12% chlorhexidine gluconate, and dried using paper points. Obturation was accomplished using lateral condensation and one of three endodontic sealers: Roth's 811, AH 26, or Sealapex. Postobturation apical leakage was measured at 270- and 360-day observation periods using the fluid filtration method. Using the mixed-model repeated-measures ANOVA test with Tukey's honest significance difference multiple comparison procedure, the results showed the saline-Sealapex combination had significantly more leakage (p < 0.05) than either the Peridex-Sealapex or saline-Roth's combinations at 270 days. No other significant differences were noted between any sealer-irrigant combination at 270 days. The saline-Sealapex combination had significantly more leakage than the saline-Roth's combination at 360 days. No other significant differences were noted at 360 days. Under the conditions of this study, chlorhexidine gluconate irrigant did not adversely affect the apical seal of three root canal cements at 270 and 360 days.