A study on the plaque removal efficiency of new and worn toothbrushes

새 칫솔과 마모된 칫솔의 치태제거효율에 관한 비교연구

  • Nam, Se-Jin (Department of Periodontology, College of Dentistry and Dental Research Institute, Seoul National University) ;
  • Yang, Byung-Kun (Department of Periodontology, College of Dentistry and Dental Research Institute, Seoul National University) ;
  • Kim, Tae-Il (Department of Periodontology, College of Dentistry and Dental Research Institute, Seoul National University) ;
  • Seol, Yang-Jo (Department of Periodontology, College of Dentistry and Dental Research Institute, Seoul National University) ;
  • Lee, Yong-Moo (Department of Periodontology, College of Dentistry and Dental Research Institute, Seoul National University) ;
  • Ku, Young (Department of Periodontology, College of Dentistry and Dental Research Institute, Seoul National University) ;
  • Rhyu, In-Chul (Department of Periodontology, College of Dentistry and Dental Research Institute, Seoul National University) ;
  • Paik, Dai-Il (Department of Preventive & Public Health Dentistry, College of Dentistry, Seoul National University) ;
  • Chung, Chong-Pyoung (Department of Periodontology, College of Dentistry and Dental Research Institute, Seoul National University) ;
  • Han, Soo-Boo (Department of Periodontology, College of Dentistry and Dental Research Institute, Seoul National University)
  • 남세진 (서울대학교 치과대학 치주과학교실 및 치학연구소) ;
  • 양병근 (서울대학교 치과대학 치주과학교실 및 치학연구소) ;
  • 김태일 (서울대학교 치과대학 치주과학교실 및 치학연구소) ;
  • 설양조 (서울대학교 치과대학 치주과학교실 및 치학연구소) ;
  • 이용무 (서울대학교 치과대학 치주과학교실 및 치학연구소) ;
  • 구영 (서울대학교 치과대학 치주과학교실 및 치학연구소) ;
  • 류인철 (서울대학교 치과대학 치주과학교실 및 치학연구소) ;
  • 백대일 (서울대학교 치과대학 예방치학교실) ;
  • 정종평 (서울대학교 치과대학 치주과학교실 및 치학연구소) ;
  • 한수부 (서울대학교 치과대학 치주과학교실 및 치학연구소)
  • Published : 2005.03.30

Abstract

3개월 동안 사용한 마모된 칫솔의 마모 정도와 양상을 관찰하고, 새 칫솔과 마모된 칫솔의 잇솔질 전 ${\cdot}$ 후 치태제거효율을 single-use design으로 비교 ${\cdot}$ 평가하여 3개월 주기의 칫솔 교체 주기의 근거를 임상적으로 확인 해보고자 하였다. 치주적으로 건강한 치과 대학생 42명을 대상으로 설문지를 통해 잇솔질 습관을 조사하고, 3개월간 동일한 칫솔과 치약을 사용하게 하였다. 3개월 후 피시험자를 무작위로 두 군(I, II)으로 나누고, 치석제거술을 시행한 뒤 2주후에 내원하도록 하였으며 내원 전 48시간동안은 잇솔질을 하지 않도록 지시하였다. 2주후 I군은 새 칫솔을, II군은 마모된 칫솔을 사용하도록 하였으며 잇솔질 전 ${\cdot}$ 후에 각각 구강 내를 erythrosin으로 염색한 후 6개의 Ramfjord 치아의 plaque score를 Patient Hygiene Performance (PHP) index로 측정하였다. 2주간의 washout period 후에 다시 치석제거술을 시행한 뒤, I군이 마모된 칫솔을, II군은 새 칫솔을 사용하게 하여 동일한 방법으로 PHP index를 각각 측정하였다. 마모된 칫솔은 수거하여 brushing surface area의 면적으로 마모도를 평가하였다. 결과는 paired t-test와 Pearson's correlation analysis로 통계처리 하였다. 2명이 탈락하였고 잇솔질 전 ${\cdot}$ 후에 대한 전체 부위, 치간 부위, 변연치은 부위의 plaque score는 두 칫솔 모두 통계학적으로 유의성 있게 감소하였으며 (p<0.0001), 두 칫솔을 비교한 경우에는 새 칫솔이 마모된 칫솔보다 치태 감소량이 통계학적으로 유의성 있게 많았다 (p<0.0001). 칫솔의 마모도는 평균 50.6% 증가하였으며, 마모도 증가에 따른 치태 감소량에는 직선적인 상관관계가 있었으나 통계학적인 유의성은 없었다. (전체 부위 r=-0.58, p=0.72 / 변연치은 부위 r=-0.50, p=0.76). Single-use design에서 3개월 동안 마모된 칫솔은 치태제거 능력에 있어서 새 칫솔보다 덜 효율적이였다. 칫솔의 마모도는 구강 위생 관리에 영향을 미치는 중요한 요인이며, 마모된 칫솔은 정기적인 교체가 요구된다. 또한, 치간 부위를 포함한 변연치은 부위의 치태를 정확하게 평가할 수 있는 치태지수에 대한 연구가 필요하겠다.

Keywords

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