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RISS 인기검색어
- 검색키워드
- 저자 : Mahmoud Helmy Belal (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Belal, Mahmoud Helmy,Yassin, Abdulaziz Korean Academy of Periodontology 2014 Journal of Periodontal & Implant Science Vol.44 No.5
Purpose: Dentin hypersensitivity is a potential threat to oral health. Laser irradiation may provide reliable and reproducible treatment but remains controversial. The present study aimed to evaluate the effects of $CO_2$ or erbium-doped yttrium aluminium garnet (Er:YAG) laser therapy, and to assess mineral content. Methods: Eighteen human single-rooted teeth affected with advanced periodontitis were obtained. Buccal and lingual surfaces were planed to form 36 specimens. Ethylenediaminetetraacetic acid gel (24%) was applied to remove the smear layer and simulate hypersensitive teeth. The experimental groups were: group 1, control (no irradiation); group 2, $CO_2$ laser (repetitive pulsed mode, 2 W, $2.7J/cm^2$); and group 3, Er:YAG laser (slight contact mode, 40 mJ/pulse and 10 Hz). To evaluate dentinal tubule occlusion, six specimens per group (2-mm thickness) were prepared and observed using scanning electron microscopy (SEM) for calculation of the occlusion percentage. To evaluate the mineral content, six specimens per group (0.6-mm thickness) were used, and then the levels of Ca, K, Mg, Na, and P were measured by inductively coupled plasma-atomic emission spectrometry. In addition, the surface temperature of the specimens during laser irradiation was analyzed by a thermograph. Results: The SEM photomicrographs indicated melted areas around exposed dentinal tubules and a significantly greater percentage of tubular occlusion in the $CO_2$ and Er:YAG laser groups than the control, and in the Er:YAG group than the $CO_2$ laser group. In addition, no significant differences were noted among the experimental groups for the mineral elements analyzed. The $CO_2$ laser group showed an evident thermal effect compared to the Er:YAG group. Conclusions: $CO_2$ and Er:YAG laser are effective in treating dentin hypersensitivity and reducing its symptoms. However, the Er:YAG laser has a more significant effect; thus, it may constitute a useful conditioning item. Furthermore, neither $CO_2$ nor Er:YAG lasers affected the compositional structure of the mineral content.
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Mahmoud Helmy Belal,Abdulaziz Yassin 대한치주과학회 2014 Journal of Periodontal & Implant Science Vol.44 No.5
Purpose: Dentin hypersensitivity is a potential threat to oral health. Laser irradiation mayprovide reliable and reproducible treatment but remains controversial. The present studyaimed to evaluate the effects of CO2 or erbium-doped yttrium aluminium garnet (Er:YAG)laser therapy, and to assess mineral content. Methods: Eighteen human single-rooted teeth affected with advanced periodontitis wereobtained. Buccal and lingual surfaces were planed to form 36 specimens. Ethylenediaminetetraaceticacid gel (24%) was applied to remove the smear layer and simulate hypersensitiveteeth. The experimental groups were: group 1, control (no irradiation); group 2, CO2 laser(repetitive pulsed mode, 2 W, 2.7 J/cm²); and group 3, Er:YAG laser (slight contact mode,40 mJ/pulse and 10 Hz). To evaluate dentinal tubule occlusion, six specimens per group (2-mm thickness) were prepared and observed using scanning electron microscopy (SEM) forcalculation of the occlusion percentage. To evaluate the mineral content, six specimens pergroup (0.6-mm thickness) were used, and then the levels of Ca, K, Mg, Na, and P were measuredby inductively coupled plasma-atomic emission spectrometry. In addition, the surfacetemperature of the specimens during laser irradiation was analyzed by a thermograph. Results: The SEM photomicrographs indicated melted areas around exposed dentinal tubulesand a significantly greater percentage of tubular occlusion in the CO2 and Er:YAG lasergroups than the control, and in the Er:YAG group than the CO2 laser group. In addition,no significant differences were noted among the experimental groups for the mineral elementsanalyzed. The CO2 laser group showed an evident thermal effect compared to theEr:YAG group. Conclusions: CO2 and Er:YAG laser are effective in treating dentin hypersensitivity and reducingits symptoms. However, the Er:YAG laser has a more significant effect; thus, it mayconstitute a useful conditioning item. Furthermore, neither CO2 nor Er:YAG lasers affectedthe compositional structure of the mineral content.
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