感染根管の一回治療におけるPulsed Nd : YAGレーザーの照射効果に関する病理組織学的および臨床的研究  [in Japanese] Pulsed Nd : YAG Laser application to one-visit treatment of infected root canals : Histopathological and Clinical Examinations  [in Japanese]

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Author(s)

    • 木庭 健次 KOBA Kenji
    • 昭和大学歯学部歯内療法学講座 Department of Endodontics, Showa University School of Dentistry

Abstract

<p><b>Abstract : </b>The purpose of this study was to evaluate the effect of Nd : YAG laser irradiation to accelerate the healling of the periapical lesion of the infected root canal in one-visit treatment, through animal and clinical experiments.</p><p> To find the parameters of effective and safe irradiation, a histopathological examination was performed using 15 dogs with artificially-induced periapical lesion (340 roots). The root canals were instrumented up to #40 file with alternative irrigation of H<sub>2</sub>O<sub>2</sub> and NaOCl. After drying the canal, the fiber tip of Nd : YAG laser was inserted to the apical seat. Then the canal was irradiated with different powers and timds in each laser group, but it was not irradiated in control groups. In the laser groups, Indian ink was applied on the apical canal wall of half of the moots before irradiation. Root canal obturation was immediately performed in both groups with gutta-percha and sealer. After2, 4 and 8weeks, the animals were sacrificed and prepared for histopathological examination. The results were as follows : </p><p> 1. Removal of debris from the root canal was noticed in the laser groups irrespective of the use of Indian ink.</p><p> 2. Transpiration of root canal wall was observed undes the condition of lW・1s with India ink, however, it was not observed under the condition of less than 2W・2s and 3W・1s without India ink.</p><p> 3. Periapical healing was significant after 4 weeks in the laser groups.</p><p> From the above results, laser parameters for clinical application was determined to be 1W・1sec irradiation without India ink.</p><p> For the clinical experiment, 70 cases of 38 volunteers which were diagnosed as asymptomatic pulp necrosis with periapical lesion were chosen. They were randomly divided into the laser group and the control group.</p><p> 1. Postoperative pain was significantly less in the laser group.</p><p> 2. Periapical healing, determined by X-ray analysis after 3 and 6 months, was significantly better and earlier in the laser group.</p><p> It was concluded that Nd : YAG laser irradiation of infected root canals was useful for one-visit treatment of asymptomatic pulp necrosis with periapical lesion.</p>

Journal

  • The Journal of Japan Endodontic Association

    The Journal of Japan Endodontic Association 16(1), 20-37, 1995-06-30

    Japan Endodontic Association

References:  47

Cited by:  3

Codes

  • NII Article ID (NAID)
    10008153242
  • NII NACSIS-CAT ID (NCID)
    AN10443184
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    13406248
  • Data Source
    CJP  CJPref  J-STAGE 
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