Abstract：
OBJECTIVE: Our objective was to determine the efficacy of pre-procedural rinsing with chlorhexidine in reducing bacterial aerosol contamination during use of ultrasonic scaler and comparing the efficacy of water, non-tempered chlorhexidine and tempered chlorhexidine in reducing bacterial count in aerosols when used as a pre-procedural rinse.
METHODS: The study was designed to include 30 systemically healthy patients in different age groups. The patients were divided randomly into 3 groups (I, II, III) of 10 patients each to be administered with sterile water, non tempered chlorhexidine and tempered chlorhexidine, respectively, as a pre-procedural rinse. The aerosol produced by the ultrasonic unit was collected at 3° clock, 6° clock and 12° clock positions on blood agar plates within a range of 4 feet in all the three groups. The blood agar plates were incubated for 48 hours and the total number of colony forming units (CFUs) were counted and statistically analyzed.
RESULTS: The results showed that CFU in group III and group II were significantly reduced when compared to group I with F=1084.92, P<0.001 (ANOVA). Also, CFU in group III was significantly reduced when compared to group II with P<0.001.
CONCLUSIONS: Pre-procedural rinse can significantly reduce the viable microbial content of dental aerosols and tempered chlorhexidine was more effective than non-tempered chlorhexidine.
METHODS: The study was designed to include 30 systemically healthy patients in different age groups. The patients were divided randomly into 3 groups (I, II, III) of 10 patients each to be administered with sterile water, non tempered chlorhexidine and tempered chlorhexidine, respectively, as a pre-procedural rinse. The aerosol produced by the ultrasonic unit was collected at 3° clock, 6° clock and 12° clock positions on blood agar plates within a range of 4 feet in all the three groups. The blood agar plates were incubated for 48 hours and the total number of colony forming units (CFUs) were counted and statistically analyzed.
RESULTS: The results showed that CFU in group III and group II were significantly reduced when compared to group I with F=1084.92, P<0.001 (ANOVA). Also, CFU in group III was significantly reduced when compared to group II with P<0.001.
CONCLUSIONS: Pre-procedural rinse can significantly reduce the viable microbial content of dental aerosols and tempered chlorhexidine was more effective than non-tempered chlorhexidine.
摘要：
目的：我们的目的是确定使用洗必泰进行术前冲洗在减少超声洁治器期间细菌气溶胶污染方面的功效，并比较水的功效，非回火氯己定和回火氯己定用作程序前冲洗时减少气雾剂中的细菌计数。
方法：该研究旨在包括30名不同年龄组的全身健康患者。将患者随机分为3组(I,II,III)10名患者每人给予无菌水，非回火氯己定和回火氯己定，分别,作为程序前冲洗。超声波单元产生的气溶胶以3°时钟收集，在所有三组中,在4英尺范围内的血琼脂板上的6°时钟和12°时钟位置。将血琼脂板孵育48小时,并对菌落形成单位(CFU)的总数进行计数和统计学分析。
结果：结果显示，与I组相比，III组和II组的CFU显着降低，F=1084.92，P<0.001（ANOVA）。此外，与II组相比，III组的CFU显着降低，P<0.001。
结论：术前冲洗可以显着降低牙科气雾剂中的活微生物含量，并且温和的氯己定比非温和的氯己定更有效。
方法：该研究旨在包括30名不同年龄组的全身健康患者。将患者随机分为3组(I,II,III)10名患者每人给予无菌水，非回火氯己定和回火氯己定，分别,作为程序前冲洗。超声波单元产生的气溶胶以3°时钟收集，在所有三组中,在4英尺范围内的血琼脂板上的6°时钟和12°时钟位置。将血琼脂板孵育48小时,并对菌落形成单位(CFU)的总数进行计数和统计学分析。
结果：结果显示，与I组相比，III组和II组的CFU显着降低，F=1084.92，P<0.001（ANOVA）。此外，与II组相比，III组的CFU显着降低，P<0.001。
结论：术前冲洗可以显着降低牙科气雾剂中的活微生物含量，并且温和的氯己定比非温和的氯己定更有效。
