Pub Date : 1995-03-15DOI: 10.5984/JJPNSOCLASERDENT.2.1
T. Morioka, S. Tagomori, Yuko Inai
The authors have demonstrated that a normal pulsed Nd: YAG laser was the most suitable among the lasers to produce resistance against acid decalcification of human tooth enamel, and a combined treatment of laser irradiation and fluoride application onto the enamel obtained most remarkale acid resistance.It is interest to determine whether the use of laser and fluoride in combination is a more effective procedure for incipient caries prevention.Artificial caries-like lesions were made on human enamel, and the enamel was then treated with laser irradiation and APF (acidulated phosphate fluoride). The laser used in this study was a normal pulsed Nd YAG laser which has 0.3 msec pulses with a pulse energy of 0.2 J/pulse. The tooth enamel was lased at a repitition rate of 20pps and total enegy density of 40J/cm2.The acid resistance of the enamel was determined by the amount of dissolved calcium from the enamel surface in the acidic solution. Fluoride uptake in the enamel was examined by mean of EPM (electron probe microanalyzer). Remineralization of the enamel was measured by microradiographic technique and microhardness test. The following results were obtained.1) An increment in acid resistance of enamel was caused by laser irradiation alone and also fluoride treatment after laser irradiation.2) In the case of fluoride treatment after laser irradiation, the fluoride uptake into the surface and subsurface enamel was higher than in the cases of fluoride treatment alone.3) The remineralization was remarkable in the cases of laser irradiation and fluoride treatment after laser irradiation groups. The extent of remineralization was seen from the surface to the bottom of the lesion area.
{"title":"The Incremental Effect of Acid Resistance and Remineralization on Incipient Caries of Enamel with Laser Irradiation","authors":"T. Morioka, S. Tagomori, Yuko Inai","doi":"10.5984/JJPNSOCLASERDENT.2.1","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.2.1","url":null,"abstract":"The authors have demonstrated that a normal pulsed Nd: YAG laser was the most suitable among the lasers to produce resistance against acid decalcification of human tooth enamel, and a combined treatment of laser irradiation and fluoride application onto the enamel obtained most remarkale acid resistance.It is interest to determine whether the use of laser and fluoride in combination is a more effective procedure for incipient caries prevention.Artificial caries-like lesions were made on human enamel, and the enamel was then treated with laser irradiation and APF (acidulated phosphate fluoride). The laser used in this study was a normal pulsed Nd YAG laser which has 0.3 msec pulses with a pulse energy of 0.2 J/pulse. The tooth enamel was lased at a repitition rate of 20pps and total enegy density of 40J/cm2.The acid resistance of the enamel was determined by the amount of dissolved calcium from the enamel surface in the acidic solution. Fluoride uptake in the enamel was examined by mean of EPM (electron probe microanalyzer). Remineralization of the enamel was measured by microradiographic technique and microhardness test. The following results were obtained.1) An increment in acid resistance of enamel was caused by laser irradiation alone and also fluoride treatment after laser irradiation.2) In the case of fluoride treatment after laser irradiation, the fluoride uptake into the surface and subsurface enamel was higher than in the cases of fluoride treatment alone.3) The remineralization was remarkable in the cases of laser irradiation and fluoride treatment after laser irradiation groups. The extent of remineralization was seen from the surface to the bottom of the lesion area.","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132357188","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 : 1994-06-01DOI: 10.5984/JJPNSOCLASERDENT.5.23
春美 水城, 憲司 河野, 正嗣 清水
We present a case of oral malignant melanoma, which was treated by CO2laser surgery and radiation, and which has been controlled over seven years after the treatment.A 78-year-old female visited our hospital with a complaint of a black tumor in the upper molar region, September 20th, 1985. She noticed a swelling 2 months ago. At the first visit we observed a well defined pigmented mass, 20×30mm in size, in the left upper molar alveolar region, and several pigmented spots in the median part of the hard palate and the left buccal mucosa. We made a diagnosis of malignant melanoma and began a linac X-ray irradiation. When the radiation dose was 26Gy, we excised and vaporized the lesion including the bone of alveolar process and palate, pigmented spots of the palate and buccal mucosa using CO2 laser. Then we continued the radiotherapy and finished it total 60Gy. There is no recurrence or metastases over seven years after the treatment.
{"title":"レーザー外科および放射線照射により治癒した上顎悪性黒色腫の 1 例","authors":"春美 水城, 憲司 河野, 正嗣 清水","doi":"10.5984/JJPNSOCLASERDENT.5.23","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.5.23","url":null,"abstract":"We present a case of oral malignant melanoma, which was treated by CO2laser surgery and radiation, and which has been controlled over seven years after the treatment.A 78-year-old female visited our hospital with a complaint of a black tumor in the upper molar region, September 20th, 1985. She noticed a swelling 2 months ago. At the first visit we observed a well defined pigmented mass, 20×30mm in size, in the left upper molar alveolar region, and several pigmented spots in the median part of the hard palate and the left buccal mucosa. We made a diagnosis of malignant melanoma and began a linac X-ray irradiation. When the radiation dose was 26Gy, we excised and vaporized the lesion including the bone of alveolar process and palate, pigmented spots of the palate and buccal mucosa using CO2 laser. Then we continued the radiotherapy and finished it total 60Gy. There is no recurrence or metastases over seven years after the treatment.","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128726545","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 : 1993-06-01DOI: 10.5984/JJPNSOCLASERDENT.4.33
道生 金子, 秀 松下, 麦夫 加藤, 憲司 吉田, 昌彦 深谷
The authors have tried previously to substitute a conventional stellate ganglionblock use of local regional anesthetic agents with low power output laser irradiation on thestellate ganglion. It is necessary for the clarification of a function mechanism compare bothmethods.However, stellate ganglion blocking could not be carried out because it was difficult to getsubjects. Fortunately we were recently able to get some volunteers to help us. In this papera comparison between the conventional stellate ganglion block that uses local anestheticagents and low power output Nd: YAG laser irradiation on the stellate ganglion is described.Facial cutaneous temperature, blood pressure and the pulse rate were measured. Facialcutaneous temperatures were analyzed from the image. (J. Jpn. Soc. Laser Dent. 4: 33-38, 1993 Reprint requests to Dr. Kaneko)
{"title":"低出力 Nd: YAG レーザー星状神経節照射の効果について","authors":"道生 金子, 秀 松下, 麦夫 加藤, 憲司 吉田, 昌彦 深谷","doi":"10.5984/JJPNSOCLASERDENT.4.33","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.4.33","url":null,"abstract":"The authors have tried previously to substitute a conventional stellate ganglionblock use of local regional anesthetic agents with low power output laser irradiation on thestellate ganglion. It is necessary for the clarification of a function mechanism compare bothmethods.However, stellate ganglion blocking could not be carried out because it was difficult to getsubjects. Fortunately we were recently able to get some volunteers to help us. In this papera comparison between the conventional stellate ganglion block that uses local anestheticagents and low power output Nd: YAG laser irradiation on the stellate ganglion is described.Facial cutaneous temperature, blood pressure and the pulse rate were measured. Facialcutaneous temperatures were analyzed from the image. (J. Jpn. Soc. Laser Dent. 4: 33-38, 1993 Reprint requests to Dr. Kaneko)","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126608646","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 : 1993-06-01DOI: 10.5984/JJPNSOCLASERDENT.4.3
雅博 飯田, 嘉則 安藤, 久 渡辺, 烈 石川
The purpose of this study was to investigate the effect of GaAlAs-semicondutorlaser irradition dentin hypersensitivity of exposed root surface and its influence to microflora in the dento-gingival region.Twenty two teeth from 6 patients with dentin hypersensitivity of exposed root surface weresubjected to this experiment. This irradiation of GaAlAs-semiconductor laser (central wavelength: 900nm, average output: 2.4mW) was applied to an exposed root surface for 2min30s in the experimental group. Effect of laser irradiation was varified by the examination ofsensitivity rate to cold water, air blow and mechanical stimuli of explorer at before, immediately after, 1 week after and 4 weeks after laser irradiation and at the same time samplingof dental plaque from the dento-gingival region and bacterial measurements by dark fieldmicroscopy were performed. Dummy laser device was used in the control group and followed to carry out the same examination.Laser irradiated group showed significant high improvement of hypersensitivity to coldwater, air blow and mechanical stimuli of explorer compared to control group (p<0.05).No remarkable difference was observed in the total bacterial cell counts and the compositionof micro biota between two groups.GaAlAs-semiconductor laser irradiation is indicated to be effective to dentin hypersensitivity of exposed root surface but failed to have its influence upon micro-flora in the dentogingival region. (J. Jpn. Soc. Laser Dent.4: 3-7, 1993Reprint requests to Dr. Iida)
{"title":"半導体 (GaAlAs) レーザーの露出根面の知覚過敏症に対する効果および歯肉溝領域の細菌叢に及ぼす影響","authors":"雅博 飯田, 嘉則 安藤, 久 渡辺, 烈 石川","doi":"10.5984/JJPNSOCLASERDENT.4.3","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.4.3","url":null,"abstract":"The purpose of this study was to investigate the effect of GaAlAs-semicondutorlaser irradition dentin hypersensitivity of exposed root surface and its influence to microflora in the dento-gingival region.Twenty two teeth from 6 patients with dentin hypersensitivity of exposed root surface weresubjected to this experiment. This irradiation of GaAlAs-semiconductor laser (central wavelength: 900nm, average output: 2.4mW) was applied to an exposed root surface for 2min30s in the experimental group. Effect of laser irradiation was varified by the examination ofsensitivity rate to cold water, air blow and mechanical stimuli of explorer at before, immediately after, 1 week after and 4 weeks after laser irradiation and at the same time samplingof dental plaque from the dento-gingival region and bacterial measurements by dark fieldmicroscopy were performed. Dummy laser device was used in the control group and followed to carry out the same examination.Laser irradiated group showed significant high improvement of hypersensitivity to coldwater, air blow and mechanical stimuli of explorer compared to control group (p<0.05).No remarkable difference was observed in the total bacterial cell counts and the compositionof micro biota between two groups.GaAlAs-semiconductor laser irradiation is indicated to be effective to dentin hypersensitivity of exposed root surface but failed to have its influence upon micro-flora in the dentogingival region. (J. Jpn. Soc. Laser Dent.4: 3-7, 1993Reprint requests to Dr. Iida)","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127898817","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 : 1993-06-01DOI: 10.5984/JJPNSOCLASERDENT.4.75
睦彦 村井, 賢二 橋本, 一郎 山田, 万枝 山口, 善政 北川, 聡 落合, 勝彦 佐藤
This study investigated the long-term biological effects of the Excimer Laser. The surface of the skin and buccal mucosa in the rat were irradiated with a KrF Excimer Laser at a wave length of 248nm (skin for 15 seconds; buccal mucosa for 2 seconds) at a pulse repetition rate of 20Hz and a pulse width of 15nsec. The peak power was 6MW and average power was 1.8W; spot size was 4.0×1.0mm.The irradiated skin tissue and buccal mucosa, heart, lung, kidney, liver, and spleen were removed two years after irradiation and stained with H-E stain for pathological examina tion.KrF Excimer Laser irradiation at 248nm did not cause carcinogenesis and there were noremarkable observations in the skin, buccal mucosa, or other organs (heart, lung, kidney, liver, and spleen), except for two benign tumors one arising from the alar part and the other from the axillary region.
{"title":"KrF Excimer Laserの生体作用第2報","authors":"睦彦 村井, 賢二 橋本, 一郎 山田, 万枝 山口, 善政 北川, 聡 落合, 勝彦 佐藤","doi":"10.5984/JJPNSOCLASERDENT.4.75","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.4.75","url":null,"abstract":"This study investigated the long-term biological effects of the Excimer Laser. The surface of the skin and buccal mucosa in the rat were irradiated with a KrF Excimer Laser at a wave length of 248nm (skin for 15 seconds; buccal mucosa for 2 seconds) at a pulse repetition rate of 20Hz and a pulse width of 15nsec. The peak power was 6MW and average power was 1.8W; spot size was 4.0×1.0mm.The irradiated skin tissue and buccal mucosa, heart, lung, kidney, liver, and spleen were removed two years after irradiation and stained with H-E stain for pathological examina tion.KrF Excimer Laser irradiation at 248nm did not cause carcinogenesis and there were noremarkable observations in the skin, buccal mucosa, or other organs (heart, lung, kidney, liver, and spleen), except for two benign tumors one arising from the alar part and the other from the axillary region.","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115304449","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 : 1992-06-01DOI: 10.5984/JJPNSOCLASERDENT.3.57
中山 哲夫
{"title":"Pulsed Nd: YAG Laser (D-Lase 300) 照射時のエナメル質と象牙質の形態学的研究","authors":"中山 哲夫","doi":"10.5984/JJPNSOCLASERDENT.3.57","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.3.57","url":null,"abstract":"","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126216063","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 : 1992-06-01DOI: 10.5984/JJPNSOCLASERDENT.3.23
M. Kumazaki, H. Fujiwara, Takahiro Matsuda, Kunio Zennyu, M. Kumazaki, Koich Toyoda, B. Fujii
progressed to the point that many new uses of lasers for dental treatment will soon be possible. More than 20 years ago attempts were made to remove dentinal caries with a ruby laser, but clinical application of this technique was dou btful due to the resulting damage to the pulp and periodontal tissue and the cracking of teeth. Many researchers were stimulated by Stern et. al.'s report that application of a laser could make the enamel more acid resistant, and the
{"title":"Excision of Dental Caries","authors":"M. Kumazaki, H. Fujiwara, Takahiro Matsuda, Kunio Zennyu, M. Kumazaki, Koich Toyoda, B. Fujii","doi":"10.5984/JJPNSOCLASERDENT.3.23","DOIUrl":"https://doi.org/10.5984/JJPNSOCLASERDENT.3.23","url":null,"abstract":"progressed to the point that many new uses of lasers for dental treatment will soon be possible. More than 20 years ago attempts were made to remove dentinal caries with a ruby laser, but clinical application of this technique was dou btful due to the resulting damage to the pulp and periodontal tissue and the cracking of teeth. Many researchers were stimulated by Stern et. al.'s report that application of a laser could make the enamel more acid resistant, and the","PeriodicalId":187459,"journal":{"name":"Journal of Japanese Society for Laser Dentistry","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121393833","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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