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In Vivo comparison of Reduction in Bacterial Count after Caries Excavation with 3 Different techniques

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Purpose: The purpose of this in vivo study was to evaluate and compare the reduction in bacterial count in dentin after caries excavation with a spoon excavator, carbide bur, and polymer bur.

Methods: Forty-five primary molar teeth from 36 children with occlusal dentinal carious lesions without pulpal involvement were chosen and divided into 3 groups: (1) caries was excavated using a brand new round bur with a slow-speed handpiece at 800 rpm from the occlusal aspect; (2) new polymer burs were used with slow-speed handpiece at 800 rpm, according to the lesion's size; (3) caries was excavated using a sterile spoon excavator.

Results: The mean difference in colony forming units of Streptococcus mutans and lactobacilli before and after caries excavation was found to be significant (P<.01) in all 3 groups. Further intergroup comparison of percentage reduction in bacterial counts between different groups was statistically significant, except when the percentage reduction in S mutans of group 2 was compared to that of group 3 (P=.26). Reduction in S mutans count was highly significant (P<.001) for group 1 vs group 3.

Conclusions: Caries removal with a carbide bur, polymer bur, and spoon excavator produced significant reduction in viable count of both Streptococcus mutans and lactobacilli. Carbide burs, however, produced greater reduction in the viable count of bacteria followed by polymer bur and spoon excavator.
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Document Type: Research Article

Affiliations: 1: Postgraduate Student, Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Karnataka, India 2: Professor, Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Karnataka, India. [email protected] 3: Professor and Head, Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Karnataka, India

Publication date: 01 January 2011

More about this publication?
  • Acquired after the merger between the American Society of Dentistry for Children and the American Academy of Pediatric Dentistry in 2002, the Journal of Dentistry for Children (JDC) is an internationally renowned journal whose publishing dates back to 1934. Published three times a year, JDC promotes the practice, education and research specifically related to the specialty of pediatric dentistry. It covers a wide range of topics related to the clinical care of children, from clinical techniques of daily importance to the practitioner, to studies on child behavior and growth and development. JDC also provides information on the physical, psychological and emotional conditions of children as they relate to and affect their dental health.
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