Effect of Herbal and Chemical Solution in Tissue Dissolution by using Conventional Irrigation and Sonic Irrigation System.

Introduction: An essential part of root canal cleaning is irrigating the system to remove any remaining debris and tissue remains. The purpose of root canal therapy is to shape and clean the endodontic space, reduce the bacterial burden, and remove the pulp tissue. In this research, several irrigation solutions with and without sonic irrigation were evaluated to see how quickly tissue dissolves. Method: A tissue sample was taken from a cow (68 ± 3 mg) with no statistically significant difference between groups. All five test tubes in each group were immersed in irrigant, and each group contained one subgroup with five test tubes. Separate weights were recorded for every irrigant that had been passed through the filter paper. Thus, the quantity of pulp dissolved by different irrigating solutions was quantified using a filtering technique.
Results: It was revealed that there was a substantial difference between the groups. Sonic and non-sonic irrigation of sodium hypochlorite resulted in a substantial difference in tissue disintegration.
Conclusion: This research found that sodium hypochlorite was more effective than EDTA and saline in dissolving pulp. Despite several studies claiming that neem has potent antibacterial activities, tissue dissolution has not been shown in experiments using this herb. Copyright:

INTRODUCTION

In order for endodontic therapy to be effective, chemo-mechanical preparation is a must. By using equipment and efficient irrigating solutions, chemo-mechanical debridement may be accomplished in the root canal system.[1] One of the most important aspects of endodontic therapy is irrigating the root canal. Using a flushing mechanism, the irrigants help remove germs, tissue remnants, and dentin chips from the root canal before and after instrumentation.[2] Many irrigants also have antibacterial properties and actively destroy bacteria and yeasts when they come into contact with them. The optimum irrigant or combination of irrigants eliminates germs, dissolves necrotic tissue, lubricates the canal, removes the smear layer, and does not irritate healthy tissues. In the past, sterile saline, alcohol, hydrogen peroxide, NaOCl, and detergents were some of the solutions utilized (e.g., quaternary ammonium compounds, chlorhexidine, citric acids, and EDTA).

The irrigant should have the ability to dissolve organic dentinal tissues (pulp tissue, collagen, and biofilm), and to dissolve inorganic dentinal tissues.[3] A “preferred sanctuary” for bacterial clusters and their byproducts is created in necrotic pulp.[4] Half the root canal walls are left unprotected by contemporary nickel titanium instrumentation devices and typical stainless steel hand tools. These complications hinder the capacity to properly clean the pulp cavities. Dentinal tubule bacteria, ramifications, deltas, and abnormalities may be unaffected by endodontic cleaning techniques at times. Chemo-mechanical root canal preparation has been shown to be essential in this case.[56]

Different irrigation solutions and sonic irrigation will be compared for tissue dissolution in this investigation.

MATERIALS

Five irrigation solutions were used in this study in which two were herbal; those were neem and wheatgrass solution, and commercially available 5.25% NaOCl (prime dental), EDTA (prime dental), saline were used.

METHOD

Preparation of neem solution

Neem leaves must be picked and rinsed with distilled water to get 25 grams of leaves. The neem leaves were soaked in 50 mL of 100% ethanol for 1–2 minutes, and then the mixture was macerated in a blender. Filter paper was used to remove impurities from the extract. Using the coarse residue, ethanol was added to 25 mL of ethanol, and the mixture was again filtered. When the extract reached a volume of 25 mL, a water bath was used to remove the alcohol from it. Efforts were made to keep the water bath temperature at 50°. The liquid must be kept in an airtight container[7] [Figure 1].

Figure 1

Preparation of neem solution

Preparation of wheatgrass solution

Barley seeds, which were bought from a herbal store, were grown in a sterile place. After a few weeks, the grass had been cut and dried at room temperature, grounded, and sieved. Five grams of wheatgrass was mixed with 50 ml of saline to make the irrigation solution which was then ready for use [Figure 2].

Figure 2

Preparation of wheatgrass solution

RKDF dental college and RC, Bhopal, ethical approval was obtained for this study at the department of conservative dentistry and endodontics.

The experiment employed bovine tissue as a tissue sample. 15°C and 100% humidity kept it frozen. A SS blade was used to chop frozen tissue into pieces. Each sample had the same size since the surface area had a large influence on tissue disintegration. Both groups had samples with an initial weight of 68 ± 3 mg that were indistinguishable at 68 ± 3 mg [Figure 3]. A total of 50 samples were prepared and then divided into 10 parts for each group and subgroups of five each [Tables 1 and 2].

Figure 3

Amount of tissue before and after filtration

Table 1

Inter-group comparisons

Groups	After filtration weight Mean±SD	Amount of the tissue dissolved Mean±SD
Group I	1.13±0.08	0.09±0.08
Group II	0.96±0.05	0.30±0.05
Group III	1.14±0.06	0.18±0.06
Group IV	1.50±0.01	0.02±0.01
Group V	1.43±0.01	0.01±0.01
ANOVA test, P	P=0.000 S	P=0.000 S
Group I Vs Group II: Mean differene, P	0.17, P=0.000 S	0.21, P=0.000 S
Group I Vs Group III: Mean difference, P	0.01, P=0.998 NS	0.09, P=0.084 NS
Group I Vs Group IV: Mean difference, P	0.37, P=0.000 S	0.07, P=0.247 NS
Group I Vs Group V: Mean difference, P	0.30, P=0.000 S	0.08, P=0.203 NS
Group II Vs Group III: Mean difference, P	0.18, P=0.000 S	0.12, P=0.008 S
Group II Vs Group IV: Mean difference, P	0.54, P=0.000 S	0.28, P=0.000 S
Group II Vs Group V: Mean difference, P	0.47, P=0.000 S	0.29, P=0.000 S
Group III Vs Group IV: Mean difference, P	0.36, P=0.000 S	0.16, P=0.001 S
Group III Vs Group V: Mean difference, P	0.29, P=0.000 S	0.17, P=0.001 S
Group IV Vs Group V: Mean difference, P	0.07, P=0.183 NS	0.01, P=1.000 NS

Statistical Analysis: ANOVA one way test and Tukey post hoc test. S: The mean difference is significant at the 0.05 level. NS: Mean difference is not significant

Table 2

Inter-group comparisons

Groups	After filtration weight Mean±SD	Amount of the tissue dissolved Mean±SD
Subgroup I	1.11±0.07	0.11±0.07
Subgroup II	0.87±0.04	0.39±0.04
Subgroup III	1.10±0.07	0.22±0.07
Subgroup IV	1.50±0.01	0.02±0.01
Subgroup V	1.42±0.02	0.02±0.02
ANOVA test, P	P=0.000 S	P=0.000 S
Subgroup I Vs Subgroup II: Mean differene, P	0.24, P=0.000 S	0.28, P=0.000 S
Subgroup I Vs Subgroup III: Mean difference, P	0.01, P=1.000 NS	0.11, P=0.017 S
Subgroup I Vs Subgroup IV: Mean difference, P	0.39, P=0.000 S	0.09, P=0.052 NS
Subgroup I Vs Subgroup V: Mean difference, P	0.31, P=0.000 S	0.09, P=0.030 S
Subgroup II Vs Subgroup III: Mean difference, P	0.23, P=0.000 S	0.17, P=0.000 S
Subgroup II Vs Subgroup IV: Mean difference, P	0.63, P=0.000 S	0.37, P=0.000 S
Subgroup II Vs Subgroup V: Mean difference, P	0.55, P=0.000 S	0.37, P=0.000 S
Subgroup III Vs Subgroup IV: Mean difference, P	0.40, P=0.000 S	0.20, P=0.000 S
Subgroup III Vs Subgroup IV: Mean difference, P	0.32, P=0.000 S	0.2, P=0.000 S
Subgroup IV Vs Subgroup V: Mean difference, P	0.08, P=0.162 NS	0.00, P=0.999 NS

Statistical Analysis: ANOVA one way test and Tukey post hoc test. S: The mean difference is significant at the 0.05 level. NS: Mean difference is not significant

The irrigant was poured into five separate test tubes, each containing a sample of 0.68 ± 0.3 grammes, cut into pieces, and immersed for the same duration of time. Each test tube was filled with tissue. Filter paper was used to remove the fluid from each test tube after a certain amount of time had passed. Analytical balances were used to measure the dry filter paper after it had been dried out. Each irrigant was filtered through the filter paper, and dried and weighed separately. The amount of tissue plus the dried filter paper was calculated (X). After the specific period of irrigation, the filter paper weighed with remaining tissue (Y). Thus X − Y = R.

To determine how much pulp dissolved by different irrigation solutions, we used filtration to assess the quantity of pulp dissolved quantitatively in each group and in each subgroup using the API sonic irrigator for 3 minutes for each irrigation solution.

As a result, the quantity of pulp dissolved by different irrigating solutions was quantified using a filtering technique.

RESULTS

Groups and subgroups showed an increase in the mean dissolution of bovine tissue. It was revealed that there was a substantial difference between the groups [Figures 4 and 5]. With sonic irrigation and without sonic irrigation, sodium hypochlorite demonstrated the greatest difference from any other group in pulp dissolving, followed by EDTA and saline. The pulp in the neem and wheatgrass solution was not much dissolved.

Figure 4

A graph showing weight of the tissue after filtration

Figure 5

A graph showing the amount of tissue dissolved

DISCUSSION

It is impossible to perform root canal instrumentation without biomechanical preparation of the tooth. Therefore, irrigation is required to remove tissue from inaccessible parts.[8]

Root canal pulp tissue and microorganisms, cannot be totally removed.[9]

The weight of the irrigant residue was determined and deducted from the total weight of the pulp combined with the solution's residue in order to calculate the accurate dissolution of pulp tissue in the current investigation using filtering technique. The irrigants saline, NaOCl, EDTA, neem solution, and wheatgrass solution were tested side by side in this investigation.

During treatment, it is crucial to perform both cleaning and debridement of the root canals. When root canal instrumentation is employed, the quality of debridement might be altered by the chemicals used for the procedure.[10]

Porcine muscle tissue, rabbit liver, rat connective tissue, and porcine oral mucosa have all been examined as irrigant dissolving models. Except for human dental pulp, the primary motivation for use non-human tissues was the ease with which the surface area of each sample could be measured and standardized.

HOCL and hydroxyl ions are liberated by ionizing NaOCl. As saponification and amino acid neutralization processes reduce the hydroxyl ion levels, the pH also drops, allowing for the production of HOCl molecules. Hydrolysis and degradation of amino acids occur as a consequence of the chloramination process.[11]

An efficient human pulp tissue solvent,[12] was 5 percent NaOCl. This finding supports Rosenfeld's research that, after 30 minutes, 2.5 percent NaOCl was less effective than 5 percent NaOCl. Saturation of tissues with sodium hypochlorite solution has been demonstrated to reduce in previous research.

Several studies have looked at the effects of NaOCl on pulp tissue, and it has been shown that it is capable of dissolving pulp tissue in the lab. Ionization of NaOCl in water results in the release of HOCl, as well as hydroxyl ions.[1314]

NaOCl at 5.25% was shown to be the most effective pulp tissue solvent when used with and without sonic irrigation, according to the results of this investigation. Once the chloramination process begins, amino acids degrade and hydrolyze in the stomach. NaOCl is utilized at concentrations ranging from 0.5% to 7%. A very efficient antibacterial, it destroys pulpal remains as well as dentin's organic constituents. 5% NaOCl is an efficient solvent for human pulp tissue.[15] Alokkumar's investigation found that at room temperature, the 3% NaOCl solution presented maximum tissue dissolution, whereas at 37°C, 13.8% ClO2solution was most effective in dissolving the tissue. At 60 minutes, a study found no difference in pulp dissolving between NaOCl concentrations of 2.5% and 5%.

Dentin calcium ions react with the solution, resulting in the formation of calcium chelates that may be dissolved in water. Because there is no quick-acting chelator, the decalcification process is self-limiting and will ultimately come to an end.[16] Smear layer was successfully removed from the canal wall after one minute of watering with 10% EDTA. It was shown that dentin demineralization increased with the contact duration, the concentration of EDTA, and the pH (from 7.5 to 9).[17] To remove the smear layer, ultrasonic application of 17% EDTA for one minute is very successful and the ongoing use of liquid EDTA throughout root canal therapy is suggested.[18]

Using the ethanolic neem leaf extract as an irritant in the root canal was found to be effective, as shown by our results. For effective tissue disintegration and antibacterial effectiveness, Sodium hypochlorite is necessary. To better understand the healing process around the radicle, researchers may use this combination in future clinical studies.[19]

As an endodontic irrigant, neem may be beneficial since it is a great antioxidant with a high biocompatibility, and so there is no danger of tissue toxicity. Biocompatibility with the human periodontal ligament fibroblasts of neem was previously shown, and this is a major aspect supporting its use in endodontics practice.[7]

Antimicrobial effectiveness of 2.5% NaOCl and 0.2% chlorhexidine gluconate, and an experimental irrigant made from neem were studied in 2014.[19] Colony forming units were counted after irrigation with irrigants in the preoperative and postoperative samples. Using neem for endodontic treatment was shown to have high antimicrobial activity, according to the study.

In this study, the mean dissolution of tissue was found to increase in groups and subgroups. Statistically significant difference was found between all the groups. Sodium hypochlorite with sonic irrigation and even without sonic irrigation showed more significant difference in dissolution of pulp than any other group followed by EDTA and saline. Neem and wheatgrass solutions showed no significant dissolution of the pulp.

CONCLUSION

With and without sonic irrigation, NaOCl was the most successful in dissolving pulp tissue. Next, the patient received EDTA and saline solution. Wheatgrass and neem were ineffective.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.