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.24.3
T. Asai, Hiroaki Suzuki, Yui Enomoto, Manabu Shigeoka, Kousuke Matsumoto, Junichiro Takeuchi, T. Komori
This research performs clinical evaluation of vascular malformation of the oral region treated by photocoagulation with an Nd:YAG laser. We report on the clinical characteristics of 70 patients who were treated for vascular malformations of the oral region from 2004 to 2012 in our hospital. The patients consisted of 23 males and 47 females, with a median age of 49.7 years. The parts in which a lesion existed were : lips 34 cases, tongue 27 cases, buccal mucosa 7 cases, gum 3 cases, mouth floor 2 cases, and soft palate 1 case. Legion size was classified into two groups : a small size of < 15mm, and a large size of 15mm ≦ , and the necessity for hospitalization, in an operation and postoperative bleeding, swelling, pain, scar formation, nerve paralysis, postoperative infection, and the number of irradiation times were evaluated. Laser irradiation was performed under local anesthesia in all the cases. Critical bleeding did not occur. Postoperative swelling occurred in ten cases(16.7%)among the 60 cases with the size of < 15mm, and occurred in nine cases(64.3%)among the 14 cases with the size of 15mm ≦. Pain occurred in 11 cases but all cases of pain were slight. Scar formation occurred in three cases ; all these cases were 15mm ≦ in size. Nerve paralysis occurred in two cases that occurred in the buccal mucosa fold near mandibular premolars. The good therapeutic result was obtained without any critical complications arising except in external irradiation using an Nd:YAG laser. (J. Jpn. Soc. Laser Dent. 24:3 ~ 9, 2013 Reprint requests to Dr. ASAI) Key words= Nd:YAG laser, Vascular malformation, Photocoagulation キーワード= Nd:YAGレーザー,血管奇形,光凝固療法 〒 650-0017 神戸市中央区楠町 7-5-2 TEL 078-382-6213 FAX 078-382-6229 7-5-2 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan. TEL +81-78-382-6213 FAX +81-78-382-6229 優秀発表賞受賞論文 4 日本レーザー歯学会誌 24:3-9,2013
{"title":"Clinical Evaluation of 74 Vascular Malformations of the Oral Region Treated by Photocoagulation with an Nd:YAG Laser","authors":"T. Asai, Hiroaki Suzuki, Yui Enomoto, Manabu Shigeoka, Kousuke Matsumoto, Junichiro Takeuchi, T. Komori","doi":"10.5984/JJPNSOCLASERDENT.24.3","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.24.3","url":null,"abstract":"This research performs clinical evaluation of vascular malformation of the oral region treated by photocoagulation with an Nd:YAG laser. We report on the clinical characteristics of 70 patients who were treated for vascular malformations of the oral region from 2004 to 2012 in our hospital. The patients consisted of 23 males and 47 females, with a median age of 49.7 years. The parts in which a lesion existed were : lips 34 cases, tongue 27 cases, buccal mucosa 7 cases, gum 3 cases, mouth floor 2 cases, and soft palate 1 case. Legion size was classified into two groups : a small size of < 15mm, and a large size of 15mm ≦ , and the necessity for hospitalization, in an operation and postoperative bleeding, swelling, pain, scar formation, nerve paralysis, postoperative infection, and the number of irradiation times were evaluated. Laser irradiation was performed under local anesthesia in all the cases. Critical bleeding did not occur. Postoperative swelling occurred in ten cases(16.7%)among the 60 cases with the size of < 15mm, and occurred in nine cases(64.3%)among the 14 cases with the size of 15mm ≦. Pain occurred in 11 cases but all cases of pain were slight. Scar formation occurred in three cases ; all these cases were 15mm ≦ in size. Nerve paralysis occurred in two cases that occurred in the buccal mucosa fold near mandibular premolars. The good therapeutic result was obtained without any critical complications arising except in external irradiation using an Nd:YAG laser. (J. Jpn. Soc. Laser Dent. 24:3 ~ 9, 2013 Reprint requests to Dr. ASAI) Key words= Nd:YAG laser, Vascular malformation, Photocoagulation キーワード= Nd:YAGレーザー,血管奇形,光凝固療法 〒 650-0017 神戸市中央区楠町 7-5-2 TEL 078-382-6213 FAX 078-382-6229 7-5-2 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan. TEL +81-78-382-6213 FAX +81-78-382-6229 優秀発表賞受賞論文 4 日本レーザー歯学会誌 24:3-9,2013","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":"124963790","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.4.63
Yukio Nakamura, Takumasa Yoshida, K. Narushima, N. Tsuzuki, H. Wakabayashi, K. Kikuchi, Koukichi Matsumoto
CO2 and Nd: YAG lasers are usually used in the clinical field. Since it is generally known that infrared lasers has thermal side effect, which cause damage to the soft and hard tissues. With infrared lasers, thermal energy densities high enough to remove the soft and hard tissues lead to structural changes, which can be seen as cracks, necrotic zone and carbonization. Recently, it has been demonstrated that the soft and hard tissue can be removed without thermal damage by excimer laser irradiation. However, there are a few studies about the effects of the ArF excimer laser on the bone tissue. The purpose of this study was to investigate the changes of the bone structure by ArF excimer laser irradiation.ArF excimer laser was irradiated on the surface of the rat's mandibula under the follow ing irradiation conditions; wave length; 193nm, output; 0.12W, pulse repetition rate;10HZ, spot size; 1.0×3.3mm, irradiation time; 60 and 120 seconds. By using the extirpated mandibula, we examined the thermal change on the surface of the non-vital mandibula dur ing laser irradiation by thermography system. The temperature rise was 34°C after 60 sec onds and 45°C after 120 scconds. Histological and scanning electron microscopical studies were perfomed immediately after the irradiation. The ArF excimer laser beam produced de fect with clean-cut margins in both non-vital and vital mandibula. There was very minimal evidence of thermal damage on the surrounding tissue. The bottom of the defect revealed sawtooth appearance on histological sections and cone or clavate appearance when examined with a scanning electron microscope. These findings suggested that it is possible to remove the bone tissue without thermal changes by ArF excimer laser irradiation. The effectiveness of this laser can be attributed to the photoablation of the bone tissue. The mechanism of the ArF excimer laser in this study has not been clarified yet. Therefore more research is necessary before this newtype of ultraviolet laser may be used in the clinical field in the future.
{"title":"The Effect of the Rat's Mandibula by ArF Excimer Laser Irradiation","authors":"Yukio Nakamura, Takumasa Yoshida, K. Narushima, N. Tsuzuki, H. Wakabayashi, K. Kikuchi, Koukichi Matsumoto","doi":"10.5984/JJPNSOCLASERDENT.4.63","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.4.63","url":null,"abstract":"CO2 and Nd: YAG lasers are usually used in the clinical field. Since it is generally known that infrared lasers has thermal side effect, which cause damage to the soft and hard tissues. With infrared lasers, thermal energy densities high enough to remove the soft and hard tissues lead to structural changes, which can be seen as cracks, necrotic zone and carbonization. Recently, it has been demonstrated that the soft and hard tissue can be removed without thermal damage by excimer laser irradiation. However, there are a few studies about the effects of the ArF excimer laser on the bone tissue. The purpose of this study was to investigate the changes of the bone structure by ArF excimer laser irradiation.ArF excimer laser was irradiated on the surface of the rat's mandibula under the follow ing irradiation conditions; wave length; 193nm, output; 0.12W, pulse repetition rate;10HZ, spot size; 1.0×3.3mm, irradiation time; 60 and 120 seconds. By using the extirpated mandibula, we examined the thermal change on the surface of the non-vital mandibula dur ing laser irradiation by thermography system. The temperature rise was 34°C after 60 sec onds and 45°C after 120 scconds. Histological and scanning electron microscopical studies were perfomed immediately after the irradiation. The ArF excimer laser beam produced de fect with clean-cut margins in both non-vital and vital mandibula. There was very minimal evidence of thermal damage on the surrounding tissue. The bottom of the defect revealed sawtooth appearance on histological sections and cone or clavate appearance when examined with a scanning electron microscope. These findings suggested that it is possible to remove the bone tissue without thermal changes by ArF excimer laser irradiation. The effectiveness of this laser can be attributed to the photoablation of the bone tissue. The mechanism of the ArF excimer laser in this study has not been clarified yet. Therefore more research is necessary before this newtype of ultraviolet laser may be used in the clinical field in the future.","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"20 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":"114410868","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)
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