Pub Date : 1900-01-01DOI: 10.5984/JJPNSOCLASERDENT.3.35
K. Kon
{"title":"In-vivo Study of Low-Power Laser Irradiation on New Bone Formation of Rat Carvaria Defect","authors":"K. Kon","doi":"10.5984/JJPNSOCLASERDENT.3.35","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.3.35","url":null,"abstract":"","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134347016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5984/JJPNSOCLASERDENT.25.148
K. Takamori, Yuko Tanaka, Wakiko Terauchi
: The clinical examination of dental caries is usually conducted by visual inspection and tactile palpation in conjunc-tion with radiographic examination. Last year, a new device for diagnosis, DIAGNOcam received pharmaceutical approval in Japan. In this apparatus, laser diode light（wavelength 780 nm）is transmitted from bone to tooth, and the images are cap-tured by a charged-coupled device. The detection of dental caries is based on the changes in the contrast of the obtained images compared with that of healthy tooth substances. Recent reports have indicated that this new device has an advantage of no radiation exposure and is effective for caries examination of permanent dentition. However, there is little data available on its efficacy for caries examination of primary teeth. The aim of this study was to evaluate the clinical efficiency of the DIAGNOcam in caries examination of primary teeth. We analyzed eight primary teeth from four individuals, and found that the DIAGNOcam was useful for caries examination of primary teeth. However, the initial caries was not clearly identified. This clinical study revealed that the DIAGNOcam is a useful tool for caries detection in primary as well as permanent teeth.
{"title":"The Case of Dental Caries Examination Using DIAGNOcam for Primary Teeth","authors":"K. Takamori, Yuko Tanaka, Wakiko Terauchi","doi":"10.5984/JJPNSOCLASERDENT.25.148","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.25.148","url":null,"abstract":": The clinical examination of dental caries is usually conducted by visual inspection and tactile palpation in conjunc-tion with radiographic examination. Last year, a new device for diagnosis, DIAGNOcam received pharmaceutical approval in Japan. In this apparatus, laser diode light（wavelength 780 nm）is transmitted from bone to tooth, and the images are cap-tured by a charged-coupled device. The detection of dental caries is based on the changes in the contrast of the obtained images compared with that of healthy tooth substances. Recent reports have indicated that this new device has an advantage of no radiation exposure and is effective for caries examination of permanent dentition. However, there is little data available on its efficacy for caries examination of primary teeth. The aim of this study was to evaluate the clinical efficiency of the DIAGNOcam in caries examination of primary teeth. We analyzed eight primary teeth from four individuals, and found that the DIAGNOcam was useful for caries examination of primary teeth. However, the initial caries was not clearly identified. This clinical study revealed that the DIAGNOcam is a useful tool for caries detection in primary as well as permanent teeth.","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133453264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5984/JJPNSOCLASERDENT.9.49
K. Hosoda, Shinsaku Hori, M. Ohmiya, K. Sugihara, Yorisada Khojink, M. Kumazaki, H. Imai
Many studies were achieved on the application of Er: YAG laser to periodontal disease. We irradiated Er: YAG laser with the energies of 30mJ at 10 pulse per second (pps) with enough to water and air into the periodontal pockets and measured the changes of temperature of the laser irradiated tissues and followed up the four chronic periodontitis patients. The temperature of both irradiated and non-irradiated was measured before, on and recovery. The temperature of chronic lesions which was lower than the neighboring sound lesions before the irradiation, raised after the irradiation. After recovery temperature of irradiated lesions was same as sound lesions. It was suggested that the temperature of the periodontal lesions raises as recovery.
{"title":"Study of Effect on Er: YAG Laser Irradiation to Surface Temperature on Periodontal Pocket of Periodontitis","authors":"K. Hosoda, Shinsaku Hori, M. Ohmiya, K. Sugihara, Yorisada Khojink, M. Kumazaki, H. Imai","doi":"10.5984/JJPNSOCLASERDENT.9.49","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.9.49","url":null,"abstract":"Many studies were achieved on the application of Er: YAG laser to periodontal disease. We irradiated Er: YAG laser with the energies of 30mJ at 10 pulse per second (pps) with enough to water and air into the periodontal pockets and measured the changes of temperature of the laser irradiated tissues and followed up the four chronic periodontitis patients. The temperature of both irradiated and non-irradiated was measured before, on and recovery. The temperature of chronic lesions which was lower than the neighboring sound lesions before the irradiation, raised after the irradiation. After recovery temperature of irradiated lesions was same as sound lesions. It was suggested that the temperature of the periodontal lesions raises as recovery.","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"60 1 Suppl 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130302779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5984/JJPNSOCLASERDENT.25.75
Y. Daigo, H. Fukuoka, Erina Daigo, K. Kakimoto, Kazuya Takahashi, Y. Komasa
The usefulness of high reactive-level laser therapy (HLLT) and low reactivelevel laser therapy (LLLT) using a carbon dioxide laser for socket preservation in clinical cases has recently been reported. However, the mechanism of the healing-promoting effects of carbon dioxide laser irradiation remains unclear. Therefore, the emergence of osteoclasts and change of new bone formation of rats' extraction sockets by the carbon dioxide-enhanced healing process were investigated. Ninety-nine 5-week-old male Wistar rats were divided into an HLLT irradiation group (group L1), a combination of HLLT+LLLT irradiation group (group L2) and a non-irradiation group (control group) and compared. The upper-left first molar was extracted to prepare an extraction socket model. The laser irradiation groups (groups L1 and L2) underwent HLLT immediately after tooth extraction and then LLLT 1 day post-extraction (group L2). The irradiated tissues including the extraction socket were excised 6 hours and 3, 5, 7, 10 and 21 days after extraction. Then, they were fixed in 4% paraformaldehyde, decalcified in 10% EDTA solution, and paraffin-embedded employing the standard method. Next, serial sagittal sections were prepared, and granulation tissue of the extraction socket was histologically investigated using hematoxylin-eosin staining. On day 3, many osteoclasts appeared and active bone resorption at the socket was noted in the irradiation groups (groups L1 and L2) compared to the control group. On day 7, new bone formation started from the superficial layer to the middle layer of the socket in the irradiation groups. However, new bone formation was observed around the socket in the control group. On day 21, a concavity existed in the alveolar crest region in the control group, whereas the region was flat without concavity in the irradiation groups (groups L1 and L2). On osteomorphometry, the alveolar crest height in group L2 (0.7660 ±0.039) was significantly higher than that in the control group (0.6516±0.079). Carbon dioxide laser irradiation may enhance the rapid bone resorption and new bone formation on the superficial layer over the middle layer. It is suggested that carbon dioxide laser irradiation promotes the healing of tooth extraction sockets. (J. Jpn. Soc. Laser Dent. 25:75 ~ 81, 2014 Reprint requests to Dr. DAIGO) Key words= Carbon dioxide laser, Socket preservation, Enhanced healing process キーワード=炭酸ガスレーザー,ソケットプリザベーション,創傷治癒促進 〒 540-0008 大阪府大阪市中央区大手前 1-5-17 EL:06-6910-1111 FAX:06-6943-8051 1-5-7 Otemae, Chuo-ku, Osaka-city, Osaka 540-0008, Japan. TEL +81-6-6910-1111 FAX +81-6-6943-8051 76 日本レーザー歯学会誌 25:75-81,2014
{"title":"Histological Analysis of Carbon Dioxide Laser-Enhanced Healing Process of Rat Tooth Sockets","authors":"Y. Daigo, H. Fukuoka, Erina Daigo, K. Kakimoto, Kazuya Takahashi, Y. Komasa","doi":"10.5984/JJPNSOCLASERDENT.25.75","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.25.75","url":null,"abstract":"The usefulness of high reactive-level laser therapy (HLLT) and low reactivelevel laser therapy (LLLT) using a carbon dioxide laser for socket preservation in clinical cases has recently been reported. However, the mechanism of the healing-promoting effects of carbon dioxide laser irradiation remains unclear. Therefore, the emergence of osteoclasts and change of new bone formation of rats' extraction sockets by the carbon dioxide-enhanced healing process were investigated. Ninety-nine 5-week-old male Wistar rats were divided into an HLLT irradiation group (group L1), a combination of HLLT+LLLT irradiation group (group L2) and a non-irradiation group (control group) and compared. The upper-left first molar was extracted to prepare an extraction socket model. The laser irradiation groups (groups L1 and L2) underwent HLLT immediately after tooth extraction and then LLLT 1 day post-extraction (group L2). The irradiated tissues including the extraction socket were excised 6 hours and 3, 5, 7, 10 and 21 days after extraction. Then, they were fixed in 4% paraformaldehyde, decalcified in 10% EDTA solution, and paraffin-embedded employing the standard method. Next, serial sagittal sections were prepared, and granulation tissue of the extraction socket was histologically investigated using hematoxylin-eosin staining. On day 3, many osteoclasts appeared and active bone resorption at the socket was noted in the irradiation groups (groups L1 and L2) compared to the control group. On day 7, new bone formation started from the superficial layer to the middle layer of the socket in the irradiation groups. However, new bone formation was observed around the socket in the control group. On day 21, a concavity existed in the alveolar crest region in the control group, whereas the region was flat without concavity in the irradiation groups (groups L1 and L2). On osteomorphometry, the alveolar crest height in group L2 (0.7660 ±0.039) was significantly higher than that in the control group (0.6516±0.079). Carbon dioxide laser irradiation may enhance the rapid bone resorption and new bone formation on the superficial layer over the middle layer. It is suggested that carbon dioxide laser irradiation promotes the healing of tooth extraction sockets. (J. Jpn. Soc. Laser Dent. 25:75 ~ 81, 2014 Reprint requests to Dr. DAIGO) Key words= Carbon dioxide laser, Socket preservation, Enhanced healing process キーワード=炭酸ガスレーザー,ソケットプリザベーション,創傷治癒促進 〒 540-0008 大阪府大阪市中央区大手前 1-5-17 EL:06-6910-1111 FAX:06-6943-8051 1-5-7 Otemae, Chuo-ku, Osaka-city, Osaka 540-0008, Japan. TEL +81-6-6910-1111 FAX +81-6-6943-8051 76 日本レーザー歯学会誌 25:75-81,2014","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128677383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5984/JJPNSOCLASERDENT.23.78
Hiromi Sato, Y. Yoshimine, Himeka Matsumoto, Atsunobu Sakata, Chikako Hirai, T. Nagase, Masayuki Yanai, Masaharu Nishihara
: The output energy of quartz-fiber tips for an Er:YAG laser reduces with repeated or inappropriate handling dur-ing cavity preparation. The aim of this study was to find the best way to reuse a damaged tip for an Er:YAG laser. An ampu-tated surface of a tip was produced by using the following: group 1 （G1）: diamond disk; group 2 （G2）: carborundum point; group 3 （G3）: waterproof abrasive paper; group 4 （G4）: ceramic scissors. An unused new tip was used as a control. The am-putated tip surface was observed under a scanning microscope. G3 showed a relatively flat surface compared to G1, 2, and 4, which showed a rough and irregular surface. By analysis using a power meter, although G1 and 2 showed a large reduction of the output energy, G3 and 4 showed slightly lower energy than the control. In addition, the ablated cavity of a bovine dentine plate irradiated for 10 s with each tip was evaluated using a laser microscope. G1, 2, and 4 showed significant reduction of the ablation rate, whereas G3 showed no significant difference. These results suggest that among these four methods, waterproof abrasive paper might recover, to some extent, the tip surface morphology, output energy, and ablation rate.
{"title":"An Attempt to Reuse Damaged Quartz-fiber Tips for an Er:YAG Laser","authors":"Hiromi Sato, Y. Yoshimine, Himeka Matsumoto, Atsunobu Sakata, Chikako Hirai, T. Nagase, Masayuki Yanai, Masaharu Nishihara","doi":"10.5984/JJPNSOCLASERDENT.23.78","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.23.78","url":null,"abstract":": The output energy of quartz-fiber tips for an Er:YAG laser reduces with repeated or inappropriate handling dur-ing cavity preparation. The aim of this study was to find the best way to reuse a damaged tip for an Er:YAG laser. An ampu-tated surface of a tip was produced by using the following: group 1 （G1）: diamond disk; group 2 （G2）: carborundum point; group 3 （G3）: waterproof abrasive paper; group 4 （G4）: ceramic scissors. An unused new tip was used as a control. The am-putated tip surface was observed under a scanning microscope. G3 showed a relatively flat surface compared to G1, 2, and 4, which showed a rough and irregular surface. By analysis using a power meter, although G1 and 2 showed a large reduction of the output energy, G3 and 4 showed slightly lower energy than the control. In addition, the ablated cavity of a bovine dentine plate irradiated for 10 s with each tip was evaluated using a laser microscope. G1, 2, and 4 showed significant reduction of the ablation rate, whereas G3 showed no significant difference. These results suggest that among these four methods, waterproof abrasive paper might recover, to some extent, the tip surface morphology, output energy, and ablation rate.","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116121545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5984/jjpnsoclaserdent.31.74
Akira Nakane, Diantong Wei, A. Nakamoto, K. Moriya, N. Hiraishi, M. Otsuki, J. Kato, Y. Shimada
{"title":"Clinical Application of Er:YAG Laser for Removal of Melanin Pigmentation","authors":"Akira Nakane, Diantong Wei, A. Nakamoto, K. Moriya, N. Hiraishi, M. Otsuki, J. Kato, Y. Shimada","doi":"10.5984/jjpnsoclaserdent.31.74","DOIUrl":"https://doi.org/10.5984/jjpnsoclaserdent.31.74","url":null,"abstract":"","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"2019 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114576749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5984/jjpnsoclaserdent.31.78
{"title":"第33回日本レーザー歯学会講演抄録","authors":"","doi":"10.5984/jjpnsoclaserdent.31.78","DOIUrl":"https://doi.org/10.5984/jjpnsoclaserdent.31.78","url":null,"abstract":"","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114615884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5984/jjpnsoclaserdent.29.103
{"title":"日本レーザー歯学会 学術大会発表一覧（第21～30回）","authors":"","doi":"10.5984/jjpnsoclaserdent.29.103","DOIUrl":"https://doi.org/10.5984/jjpnsoclaserdent.29.103","url":null,"abstract":"","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127158732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5984/jjpnsoclaserdent.31.69
Eisuke Iso, Yuka Kato, Takahide Yamazaki, Akihiko Hasegawa, S. Yokose
{"title":"Possibility of Laser application in new Bone Regeneration Therapy","authors":"Eisuke Iso, Yuka Kato, Takahide Yamazaki, Akihiko Hasegawa, S. Yokose","doi":"10.5984/jjpnsoclaserdent.31.69","DOIUrl":"https://doi.org/10.5984/jjpnsoclaserdent.31.69","url":null,"abstract":"","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125573208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5984/JJPNSOCLASERDENT.7.12
Y. Sekine, R. Wadachi, A. Ebihara, A. Takeda, H. Suda
The aim of this study was to histopathologically investigate the effects of pulsed Nd: YAG laser irradiation on the periradicular tissues when applied in the root canal of the dog.Six adult mongrel dogs were anesthetized and the tooth pulps of the upper and lower premolars were extirpated. Each root canal was cleaned and shaped to a final apical file size #55. Non-irradiated root canals were served as control.The laser irradiation (100mJl0pps, 100mJ20pps, 100mJ30pps, 200mJ10pps and 200mJ20pps) was performed under an up-and-down motion in the root canal between the apical and cervical portion with an optical fiber (∅=400μm) for 30 sec. After the irradiation, a small cotton pellet soaked with formalin cresol was placed in the pulp chamber and the access cavity was filled with glass ionomer cement. The animals were sacrificed at 7 and 28 days postoperatively.The results were as follows:1. At 7 days postoperatively, no histopathological difference was found between the control and 100mJ10pps group. On the other hand, carbonization and defects of the root canal wall were observed in all laser-treated groups except the 100mJ10pps group.2. At 28 days postoperatively, alveolar bone resorption was often observed again in all laser-treated groups except the 100mJ10pps group. Furthermore, in the 100mJ20pps group, dentoalveolar ankylosis was observed in the periradicular tissues, and severe external root resorption was frequently seen in the 200mJ20pps group. However, in the 100mJ10pps group, the degree of inflammation in the periradicular tissues was similar to the control.3. It was concluded that pulsed Nd: YAG laser with irradiation energy less than 100mJ10pps could be used safely in the root canal of the dog.(J. Jpn. Soc. Laser Dent. 7: 12-21, 1996 Reprint requests to Dr. SEKINE)
{"title":"The Effects of Intracanal Irradiation of Pulsed Nd: YAG Laser on the Periradicular Tissues in the Dog","authors":"Y. Sekine, R. Wadachi, A. Ebihara, A. Takeda, H. Suda","doi":"10.5984/JJPNSOCLASERDENT.7.12","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.7.12","url":null,"abstract":"The aim of this study was to histopathologically investigate the effects of pulsed Nd: YAG laser irradiation on the periradicular tissues when applied in the root canal of the dog.Six adult mongrel dogs were anesthetized and the tooth pulps of the upper and lower premolars were extirpated. Each root canal was cleaned and shaped to a final apical file size #55. Non-irradiated root canals were served as control.The laser irradiation (100mJl0pps, 100mJ20pps, 100mJ30pps, 200mJ10pps and 200mJ20pps) was performed under an up-and-down motion in the root canal between the apical and cervical portion with an optical fiber (∅=400μm) for 30 sec. After the irradiation, a small cotton pellet soaked with formalin cresol was placed in the pulp chamber and the access cavity was filled with glass ionomer cement. The animals were sacrificed at 7 and 28 days postoperatively.The results were as follows:1. At 7 days postoperatively, no histopathological difference was found between the control and 100mJ10pps group. On the other hand, carbonization and defects of the root canal wall were observed in all laser-treated groups except the 100mJ10pps group.2. At 28 days postoperatively, alveolar bone resorption was often observed again in all laser-treated groups except the 100mJ10pps group. Furthermore, in the 100mJ20pps group, dentoalveolar ankylosis was observed in the periradicular tissues, and severe external root resorption was frequently seen in the 200mJ20pps group. However, in the 100mJ10pps group, the degree of inflammation in the periradicular tissues was similar to the control.3. It was concluded that pulsed Nd: YAG laser with irradiation energy less than 100mJ10pps could be used safely in the root canal of the dog.(J. Jpn. Soc. Laser Dent. 7: 12-21, 1996 Reprint requests to Dr. SEKINE)","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126198827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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