Journal of the Korean Academy of Pediatric Dentistry 2009;36(2):237-244.
Published online May 31, 2009.
THE ANTIMICROBIAL EFFECT OF HORSERADISH (ARMORACIA RUSTICANA) ROOT EXTRACTS AGAINST OBLIGATE ANAEROBES IN ROOT CANAL
1강릉대학교 치과대학 소아치과학교실, 구강과학연구소
2강릉대학교 해양생명공학부 식품미생물학교실 
치근관 내 편성 혐기성 세균에 대한 서양산 고추냉이 뿌리 추출물의 항균효과
이원주1, 박호원1, 신일식2, 이주현1, 서현우1
1강릉대학교 치과대학 소아치과학교실, 구강과학연구소
2강릉대학교 해양생명공학부 식품미생물학교실
Correspondence:  , 
Received: 10 November 2008   • Accepted: 6 March 2009
Abstract
When the symptom of periapical infection is not released by mechanical instrumentation. anti-microbial agents including antibiosis become necessary in order to remove microorganisms from the root canal. Since anti-microbial agents of natural origins are currently popular, more natural remedies are being sought out. As it turns out, it is well known isothiocyanates (ITCs) in horseradish root extract have anti-microbial activity from many studies. In this research, anti-microbial effects of horseradish root extract and chlorhexidine, a typical anti-microbial agent, were investigated and compared against two kinds of obligate anaerobes. Fusobacterium nucleatum and Prevotella nigrescens, that are often discovered in infected root canal, and Clostridium perfringens, which is resistant to antibiotics and frequently used as a control strain for antibacterial studies 1. The MIC and MBC of horseradish root extract were ranged from 87 to 470 ppm and from 156 to 625 ppm against three kinds of obligate anaerobes, respectively. Horseradish root extract showed the strongest anti-bacterial activity (MBC, 156 ppm) against F. nucleatum and also showed anti-bacterial activity against antibiotic resistant obligate anaerobes. C. perfringens. 2. The MIC and MBC of chlorhexidine were ranged from 3.12 to 6.25 ppm and 10.94 ppm against three kinds of obligate anaerobes, respectively. 3. The MIC with 87-470 ppm of horseradish root exact has the same growth inhibiting effect as the one of 3.12-6.25 ppm of chlorhexidine. Likewise, the MBC with 156-625 ppm of horseradish has the similar bactericidal effect as 10.94 ppm of chlorhexidine.
Key Words: Horseradish(Armoracia rustkana), Natural extract, Allyl iosthiocyanate(AIT), Obligate anaerobes, Chlorhexidine, Antibacterial effect


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