Journal of Periodontal and Implant Science

Korean Academy of Periodontology (대한치주과학회)
권호 표지

Effect of NaF iontophoresis and Nd:YAG laser irradiation on the abrasion-resistance of root surface

불화나트륨 이온도포와 Nd:YAG laser 조사가 치근면 내마모성에 미치는 영향

  • Kim, Chin-Dok (Department of Periodontology, College of Dentistry, Chosun University) ;
  • Yum, Chang-Yup (Department of Periodontology, College of Dentistry, Chosun University) ;
  • Kim, Song-Uk (Department of Periodontology, College of Dentistry, Chosun University) ;
  • Kim, Byung-Ock (Department of Periodontology, College of Dentistry, Chosun University) ;
  • Han, Kyung-Yoon (Department of Periodontology, College of Dentistry, Chosun University)
  • 김진덕 (조선대학교 치과대학 치주과학교실) ;
  • 염창엽 (조선대학교 치과대학 치주과학교실) ;
  • 김송욱 (조선대학교 치과대학 치주과학교실) ;
  • 김병옥 (조선대학교 치과대학 치주과학교실) ;
  • 한경윤 (조선대학교 치과대학 치주과학교실)
  • Published : 1997.12.31
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Abstract

The purpose of this study was to evaluate the abrasion-resistance of root surface after NaF iontophoresis, Nd:YAG laser irradiation and combined treatment 50 anterior teeth with flat interproximal root surface that had been extracted due to periodontal destruction were selected. All teeth were treated by the same procedure as conventional periodontal root treatment, such as scaling and root planing, root conditioning with tetracycline HCI(lOOmg/ml, 5min). The pre-treatment weight of each tooth was measured by a dial scale(SHIMADEU Co, LIBROR EB-220HU, capacity 220.000 g, Japan). All teeth were divided into 5 groups as follows: Nd:YAG laser irradiation(group 1, 1 W, 100 mJ, 10Hz, fiberoptic-root surface distance=5mm, $10\;sec.{\times}6times$, EL.EN.EN060, Italy): NaF iontophoresis(group 2, $150{\mu}A$, 4 min}: Nd:YAG laser irradiation following NaF iontophoresis(group 3): NaF iontophoresis following Nd:YAG laser irradiation(group 4): No treatment(control group). Electric toothbrushing (Oral-B, Brown Co, Germany) was conducted during 1 hour($lO\;min.{\times}6\;times$). Subsequently post-treatment weight was remeasured by the same method as pre-treatment weight measurement. The difference of abrasion rate among all groups was statistically analyzed by ANOVA(SAS program). Following results were obtained: 1. The abrasion rate was significantly lower in Nd:YAG laser irradiation group than NaF iontophoresis group(p < 0.001). 2. The abrasion rate was significantly lower in combined groups of Nd:YAG laser irradiation and NaF iontophoresis than either Nd:YAG laser irradiation group or NaF iontophoresis group(p < 0.001). 3. There was no significant difference in abrasion rate according to application order in the combined groups(p > 0.05). 4. The abrasion rate was significantly lower in all experimental groups than control group(p < 0.001). The results suggest that combined treatment of Nd:YAG laser irradiation and NaF iontophoresis on exposed root surface after periodontal therapy can enhance the abrasion-resistance of root surface and may inhibit the root caries development.

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