| Objective:In the form of case report to A mixture of Calcium hydroxide and chlorhexidine paste compared with the clinical curative effect of calcium hydroxide, observed the clinical treatment of efficiency and pain level during the root canal treatment. So that it could provide the experimental basis for a mixture of calcium hydroxide and chlorhexidine paste applicated in clinical practice. Methods:According to the registration orders, 40 cases of refractory periapical periodontitis were randomly divided into experimental group and control group, 20 cases in each group.All patients met the health treatment, no history of drug allergy, clinical examination and X-ray diagnosied of refractory periapical periodontitis. Excluded canal calcification,suffered from periodontal disease or cracked teeth and other diseases affecting the efficacy evaluation. First time: we learned periapical tissue damage of canals and periodontal condition, used the root canal measuring instrument and X-ray to determine the working length. Conventional open pulp teeth, exposed the pulp chamber roof, exploration root canal, pull pulp, determined root canal length with TF machine NiTi files to a 0.08 taper on the 25 th, 3% H202 and 0.9%NaCl alternately root canal irrigation, lap across the wet, dried canal, CP and sealed with zinc oxide eugenol cement temporarily closed. After three or more than three times the original dressing still no improvement in symptoms, percussion pain, or root canal can be seen more purulent discharge, or apical fistula healing and after the pain sealed medicine can not be achieved standard root canal,removed temporarily closed and sealed drugs, 3% H202 and 0.9%NaCl alternately irrigation, dried the canal, the experimental group imported a mixture of calcium hydroxide and chlorhexidine paste into canal,zinc oxide cement temporarily closed it;the control group imported calcium hydroxide into canal,closed it.The experimental group and the control group were one week after the patient is asked referral. A week later,examined the teeth of clinical symptoms and signs. No symptoms of teeth, removed the temporary filling and sealing drug, 3% H202 and 0.9%NaCl thoroughly irrigation,separated from the wet and dried, according to the working length the root canal put into the gutta percha, shooted X-ray to determine the main tip reached the canal working length, 3% H202 and 0.9%NaCl irrigation root canal, dried it, imported into zinc oxide iodoform paste, and filled tightly with gutta percha lateral,bottom, cavity restoration or full crown restoration; symptomatic teeth irrigated after sealed medicine, until it met canal filling conditions, recorded the times of dressing change. Results: In the two groups of sealing after the drug efficacy in the experimental group effective rate was 95%,control group effective rate was 65%, two groups have significant difference(P<0.05). In terms of degree of pain, pain degree at level for â…¡difference between two groups have statistical significance(P<0.05), the experimental group was lower than the control group. There was no statistically significant difference between the two group in pain level 0, â… , and â…¢(P > 0.05). Conclusion: A mixture of calcium hydroxide and chlorhexidine paste in the treatment of refractory periapical periodontitis,in clinical treatment efficiency is higher than calcium hydroxide;The degree of pain for grade II, a mixture of calcium hydroxide and chlorhexidine paste is lower than calcium hydroxide.In the treatment of refractory periapical periodontitis, a mixture of calcium hydroxide and chlorhexidine paste can have a good clinical effect for root canal disinfection. |
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