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Ghane HK, Samiei N, Razavi P, Khaled Y, Fekrazad R. High-Power Laser Application for Immediate Implant Placement in Infected Sites: A Systematic Review. Photobiomodul Photomed Laser Surg 2023; 41:663-673. [PMID: 38085186 DOI: 10.1089/photob.2023.0010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023] Open
Abstract
Objective: The purpose of this study was to review the literatures regarding the treatment outcomes of applying laser to the infected sites in immediate implant placement. The review tended to primarily target a question: does applying high-power laser have any positive effect on infected sites in immediate implant placement? Background: Although immediate placement of dental implants has been referred to as a predictable and successful procedure, it is prone to the presence of infection that interferes with the healing process, and triggers the failure of implants. Materials and methods: A thorough electronic database search was conducted on PubMed/Medline, Embase, Web of Science, Google Scholar, and the Cochrane library in compliance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. Two writers worked separately on screening the eligible studies, assessing whether there was a risk of bias, and extracting the required data. Results: Five out of the 60 studies nominated by the database search matched the inclusion criteria. The studies were carried out on a total of 192 patients with 296 implants in all. Ultimately, the study focused on 245 implants whose infected bed had been already decontaminated and prepared with the help of the high-intensity laser, used either alone or in combination with other approaches before implantation. With only nine failures, the implants inserted in infected and irradiated areas had a 96.3% overall survival rate. Conclusions: Taking the limitations of the review into account, the authors arrived at the conclusion that high-power laser irradiation can be beneficial for immediate implant placement in infected sites.
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Affiliation(s)
- Hadi Kaseb Ghane
- Department of Prosthodontics, Dental Branch, Islamic Azad University of Medical Sciences, Tehran, Iran
| | - Nazanin Samiei
- Department of Periodontics, Dental School, Tehran University of Medical Sciences, Tehran, Iran
| | - Pouyan Razavi
- Student Research Committee, Dental Faculty, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Yasser Khaled
- Department of General Dental Sciences, Marquette University School of Dentistry, Milwaukee, Wisconsin, USA
| | - Reza Fekrazad
- Radiation Sciences Research Center, Laser Research Center in Medical Sciences, AJA University of Medical Sciences, Tehran, Iran
- International Network for Photo Medicine and Photo Dynamic Therapy (INPMPDT), Universal Scientific Education and Research Network (USERN), Tehran, Iran
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Meghana ISS, Bhat AR, Bhandary R, Thomas B. Potential of Lasers in the Realm of Aesthetic Dentistry: A Narrative Review. JOURNAL OF HEALTH AND ALLIED SCIENCES NU 2022. [DOI: 10.1055/s-0042-1758031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
AbstractIn contemporary dental practice, patients' interests are taken into account in terms of function and appearance. The importance in everyday circumstances, current advertising, and the media in general highlight their effect on an attractive appearance. Many academics in the field of dental aesthetics have stated equivocally that when examining the impact of tooth appearance necessitates a multidisciplinary approach. Laser technology in cosmetic dentistry is in its early stages of development and has a lot of potential in the future. Also, with expanding use of lasers in clinical dentistry, treatment planning and prognosis will see a significant improvement in the future. The introduction of this technology has turned dentistry into a painless, bloodless field with increased predictability and instant outcomes. Furthermore, these techniques can help a cosmetic dentist regulate gingiva and osseous outlines with greater creativity in the pursuit of aesthetic dental principles with more efficient use of patient time. Even from the patient standpoint, the reduced requirement for suturing and faster healing times improves case acceptance and enables the increased demand for aesthetic dentistry. The resolution of this paper is to deliver an overview of various laser applications in aesthetic dentistry and its pros and cons over the conventional approaches.
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Affiliation(s)
- Ivaturi Sri Sai Meghana
- Department of Periodontology, A B Shetty Memorial Institute of Dental Sciences, NITTE Deemed to be University, Mangalore, Karnataka, India
| | - Amitha Ramesh Bhat
- Department of Periodontology, A B Shetty Memorial Institute of Dental Sciences, NITTE Deemed to be University, Mangalore, Karnataka, India
| | - Rahul Bhandary
- Department of Periodontology, A B Shetty Memorial Institute of Dental Sciences, NITTE Deemed to be University, Mangalore, Karnataka, India
| | - Biju Thomas
- Department of Periodontology, A B Shetty Memorial Institute of Dental Sciences, NITTE Deemed to be University, Mangalore, Karnataka, India
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Tianmitrapap P, Srisuwantha R, Laosrisin N. Flapless Er,Cr:YSGG laser versus traditional flap in crown lengthening procedure. J Dent Sci 2022; 17:89-95. [PMID: 35028024 PMCID: PMC8739276 DOI: 10.1016/j.jds.2021.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/08/2021] [Indexed: 10/26/2022] Open
Abstract
Background/purpose Laser technology and minimally invasive therapy has gained attention in many dentistry fields. Er,Cr:YSGG laser is the latest laser type that can be applied on both soft tissue and hard tissue. This study presents periodontal outcome of Er,Cr:YSGG laser flapless crown lengthening procedure compared with traditional technique. Materials and methods Twenty-five participants were divided into two groups: 13 patients were treated with the traditional method of crown lengthening and 12 patients were treated using a flapless Er,Cr:YSGG laser. Their periodontal status were measured and compared at baseline, immediately, one month, and three months after surgery. Results The results showed a significant increase in clinical crown length immediately after surgery in both groups. After a three-month follow-up, the gingival margin of the laser group remained at stable height with 0.17 ± 0.31 mm increase after surgery, while the gingival margin of traditional group showed both recession and rebounding by -0.13 ± 0.63 mm (p > 0.05) average. Conclusion The flapless Er,Cr:YSGG laser crown lengthening with its minimally invasive approach without flap reflection may be an alternative treatment for providing an adequate height of tooth for restoration.
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Affiliation(s)
| | - Rungtiwa Srisuwantha
- Department of Conservative Dentistry and Prosthodontics, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
| | - Narongsak Laosrisin
- Department of Conservative Dentistry and Prosthodontics, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
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Gabrić D, Aumiler D, Vuletić M, Gjorgievska E, Blašković M, Mladenov M, Pavlić V. Thermal Evaluation by Infrared Thermography Measurement of Osteotomies Performed with Er:YAG Laser, Piezosurgery and Surgical Drill-An Animal Study. MATERIALS 2021; 14:ma14113051. [PMID: 34205094 PMCID: PMC8199930 DOI: 10.3390/ma14113051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/27/2021] [Accepted: 05/31/2021] [Indexed: 11/16/2022]
Abstract
The bone healing process following osteotomy may vary according to the type of surgical instrumentation. The aim of the present in vivo study was to determine thermal changes of the bone tissue following osteotomies performed by Er:YAG laser ablation in contact and non-contact modes, piezoelectric surgery, and surgical drill using an infrared thermographic camera. For each measurement, the temperature before the osteotomy-baseline (Tbase) and the maximal temperature measured during osteotomy (Tmax) were determined. Mean temperature (ΔT) values were calculated for each osteotomy technique. The significance of the difference of the registered temperature between groups was assessed by the ANOVA test for repeated measures. Mean baseline temperature (Tbase) was 27.9 ± 0.3 °C for contact Er:YAG laser, 29.9 ± 0.3 °C for non-contact Er:YAG laser, 29.4 ± 0.3 °C for piezosurgery, and 28.3 ± 0.3 °C for surgical drill. Mean maximum temperature (Tmax) was 29.9 ± 0.5 °C (ΔT = 1.9 ± 0.3 °C) for contact Er:YAG laser, 79.1 ± 4.6 °C (ΔT = 49.1 ± 4.4 °C) for non-contact Er:YAG laser, 29.1 ± 0.2 °C (ΔT = −0.2 ± 0.3 °C) for piezosurgery, and 27.3 ± 0.4 °C (ΔT = −0.9 ± 0.4 °C) for surgical drill. Statistically significant temperature changes were observed for the non-contact laser. The results of the study showed beneficial effects of the osteotomy performed by the Er:YAG laser used in the contact mode of working as well as for piezosurgery, reducing the potential overheating of the bone tissue as determined by means of infrared thermography.
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Affiliation(s)
- Dragana Gabrić
- Department of Oral Surgery, School of Dental Medicine, University Hospital Center, University of Zagreb, 10000 Zagreb, Croatia;
| | | | - Marko Vuletić
- Department of Oral Surgery, School of Dental Medicine, University Hospital Center, University of Zagreb, 10000 Zagreb, Croatia;
- Correspondence:
| | - Elizabeta Gjorgievska
- Department of Pediatric and Preventive Dentistry, Faculty of Dental Medicine, Ss. Cyril and Methodius University, 1000 Skopje, North Macedonia;
| | - Marko Blašković
- Department of Oral Surgery, Faculty of Dental Medicine, University Hospital Center, University of Rijeka, 51000 Rijeka, Croatia;
| | - Mitko Mladenov
- Faculty of Natural Sciences and Mathematics, Institute of Biology, Ss. Cyril and Methodius University, 1000 Skopje, North Macedonia;
| | - Verica Pavlić
- Department of Periodontology and Oral Medicine, Medical Faculty, University of Banja Luka, 78000 Banja Luka, Bosnia and Herzegovina;
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Mahmoudzadeh M, Poormoradi B, Alijani S, Farhadian M, Kazemisaleh A. Efficacy of Er,Cr Laser incision Corticotomy in Rapid Maxillary Canine Retraction: A Split-Mouth Randomized Clinical Trial. J Lasers Med Sci 2020; 11:442-449. [PMID: 33425295 DOI: 10.34172/jlms.2020.69] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Introduction: This study sought to evaluate the efficacy of lasercision corticotomy for the acceleration of canine movement. Our secondary objectives were assessing the canine rotation, the rate of anchorage control, the level of pain, and the gingival index (GI). Methods: Twelve orthodontic patients (9 females and 3 males) referring to the School of Dentistry and one dental clinic from May 2019 to September 2019 participated in this split-mouth randomized clinical trial. The allocation of the test and control sides was performed by flipping a coin. The mean age of patients was 18.91±3.87 years (range 15-30 years). The treatment plan included maxillary first premolar extraction. Following the initial leveling and alignment phase, an initial impression was made. Corticotomy was carried out with the erbium, chromium-doped yttrium scandium gallium garnet (Er, Cr: YSGG) laser (3.5 W, 30 Hz, 40% air, 80% water) in one maxillary quadrant (the laser side). Canine retraction was immediately initiated following surgery using nickel-titanium closed-coil springs with 150 g force. The impression was repeated 1 month after the onset of retraction. The casts were scanned, and the distance between the canine cusp tip and the rugae line was measured to quantify the amount of anteroposterior canine movement. The molar anchorage control was also evaluated by measuring the distance between the mesial contact of the permanent first molar and the rugae line. Gingival health was evaluated using the GI. The modified McGill pain questionnaire was used to assess the level of patients' pain. Results: Lasercision corticotomy accelerated canine retraction with no adverse effect on gingival health. Anchorage loss in the posterior teeth and pain scores were not significantly different between the control and laser sides. Conclusion: Laser corticotomy can effectively accelerate canine retraction with no complications or discomfort for the patients.
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Affiliation(s)
- Majid Mahmoudzadeh
- Department of Orthodontics, Faculty of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Banafshe Poormoradi
- Assistant Professor, Laser Research Center, Department of Periodontology, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Sara Alijani
- Orthodontic Department, Dental Faculty, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Maryam Farhadian
- Assistant Professor of Biostatistics, Modeling of Noncommunicable Diseases Research Center, Department of Biostatistics, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Azadeh Kazemisaleh
- Postgraduate Student, Department of Orthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
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Chala M, Anagnostaki E, Mylona V, Chalas A, Parker S, Lynch E. Adjunctive Use of Lasers in Peri-Implant Mucositis and Peri-Implantitis Treatment: A Systematic Review. Dent J (Basel) 2020; 8:dj8030068. [PMID: 32635258 PMCID: PMC7560070 DOI: 10.3390/dj8030068] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 06/29/2020] [Accepted: 07/01/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The aim of this systematic review is to compare the effectiveness of lasers in the treatment of implant mucositis and peri-implantitis compared to conventional treatment (non-surgical or surgical: resective or regenerative). METHODS Sources of PubMed, Cochrane and Google Scholar search engines were used on articles published from 1997 to 2020 in English, with selected keyword criteria applied. Nine randomized controlled trials (RCTs) were selected. RESULTS All included studies were considered of "high quality" according to the quality assessment scale. The comparative assessment of the RCTs was done twice for each RCT based on the type of treatment and according to wavelength. There is strong scientific evidence that, regarding non-surgical treatment, adjunct laser application can provide better results only in the short term (three months). Regarding the surgical approach, the method of decontamination plays a subordinate role. All wavelengths/applications presented similar results. CONCLUSION Within the limitations of this study, the adjunctive use of lasers in the treatment of peri-implant inflammation is effective for up to three months; there is no strong evidence regarding the long term benefit compared to conventional treatment.
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Affiliation(s)
- Marianna Chala
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, 16132 Genoa, Italy
- Correspondence:
| | - Eugenia Anagnostaki
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK; (E.A.); (V.M.); (S.P.); (E.L.)
| | - Valina Mylona
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK; (E.A.); (V.M.); (S.P.); (E.L.)
| | | | - Steven Parker
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK; (E.A.); (V.M.); (S.P.); (E.L.)
| | - Edward Lynch
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK; (E.A.); (V.M.); (S.P.); (E.L.)
- School of Dental Medicine, University of Nevada, Las Vegas, NV 89154, USA
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Choi AY, Reddy CM, McGary RT, Hill RB, Swenson DT, Seibel P, Hoag JM, Berridge JP, Johnson TM. Adjunctive Nd:YAG Laser Irradiation for Ridge Preservation and Immediate Implant Procedures: A Consecutive Case Series. Clin Adv Periodontics 2019; 9:125-134. [PMID: 31490043 DOI: 10.1002/cap.10059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 02/16/2019] [Indexed: 11/10/2022]
Abstract
INTRODUCTION Whether or not laser use provides any meaningful benefit at immediate implant and ridge preservation sites remains an open question in periodontics. However, various lasers have been used in conjunction with tooth extraction and immediate implant placement. Evidence supporting adjunctive laser irradiation at immediate implant and ridge preservation sites is mostly limited to preclinical studies and a small number of case reports. CASE SERIES Adjunctive neodymium‒doped: yttrium, aluminum, garnet (Nd:YAG) laser irradiation was used at six immediate implant sites and five ridge preservation sites. Three immediate implants were in maxillary incisor positions and three were in premolar positions, two maxillary and one mandibular. All cases exhibited favorable healing and satisfactory clinical outcomes. CONCLUSIONS Nd:YAG laser energy application with 650-µs pulse duration consistently supported rapid clot formation and graft containment at immediate implant and ridge preservation sites. Histologic analyses and controlled clinical trials comparing ridge preservation and immediate implant procedures with and without laser use are needed. Because cellular responses and clinical outcomes may be exquisitely sensitive to irradiation parameters, studies should report materials and methods in detail.
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Affiliation(s)
- Alicia Y Choi
- Department of Periodontics, Army Postgraduate Dental School, Uniformed Services University of the Health Sciences, Fort Gordon, GA
| | - Caitlin M Reddy
- Department of Periodontics, United States Army Dental Health Activity, Fort Riley, KS
| | - Ryan T McGary
- Department of Periodontics, Army Postgraduate Dental School, Uniformed Services University of the Health Sciences, Fort Gordon, GA
| | - Richard B Hill
- Department of Periodontics, Army Postgraduate Dental School, Uniformed Services University of the Health Sciences, Fort Gordon, GA
| | - Dane T Swenson
- Department of Periodontics, Army Postgraduate Dental School, Uniformed Services University of the Health Sciences, Fort Gordon, GA
| | - Paul Seibel
- Department of Periodontics, United States Army Dental Health Activity, Yongsan, Korea
| | - Justin M Hoag
- Department of Periodontics, United States Army Dental Health Activity, Fort Drum, NY
| | - Joshua P Berridge
- Department of Periodontics, United States Army Dental Health Activity, Fort Bragg, NC
| | - Thomas M Johnson
- Department of Periodontics, Army Postgraduate Dental School, Uniformed Services University of the Health Sciences, Fort Gordon, GA
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Waasdorp JA. Er,Cr:YSGG Laser Debridement of an Infected Socket for Immediate Implant Placement: A Case Report. Clin Adv Periodontics 2018. [DOI: 10.1002/cap.10023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wang WR, Chang XF, He LL. [Methods of removing failed implants]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2018; 36:212-214. [PMID: 29779286 DOI: 10.7518/hxkq.2018.02.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Implant restoration has become one of the most regular methods of restoring dentition defect or edentulous. Implant placement and osseointegration are partly unreserved (fracture, implant is not in the correct three-dimensional position and cannot be repaired, peri-implantitis-affected nonmobile implants) need to be removed. This article reviews the different methods of removing implants and discusses the limitations of each method, as well as the complications that may occur during the procedure.
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Affiliation(s)
- Wan-Rong Wang
- Dept. of Implant Dentistry, Hospital of Stomatology, Xi'an Jiaotong University, Xi'an 710000, China;State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xiao-Feng Chang
- Dept. of Implant Dentistry, Hospital of Stomatology, Xi'an Jiaotong University, Xi'an 710000, China;Clinical Research Center of Shanxi Province for Dental and Maxillofacial Diseases, Xi'an 710000, China
| | - Long-Long He
- Dept. of Implant Dentistry, Hospital of Stomatology, Xi'an Jiaotong University, Xi'an 710000, China;Clinical Research Center of Shanxi Province for Dental and Maxillofacial Diseases, Xi'an 710000, China
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10
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Cobb CM. Lasers and the treatment of periodontitis: the essence and the noise. Periodontol 2000 2017; 75:205-295. [DOI: 10.1111/prd.12137] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Bowkett A, Laverty D, Patel A, Addy L. Removal techniques for failed implants. Br Dent J 2017; 220:109-14. [PMID: 26868795 DOI: 10.1038/sj.bdj.2016.88] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/08/2016] [Indexed: 11/09/2022]
Abstract
The use of dental implants is an accepted and predictable way of replacing missing or lost teeth. However, implants can and will fail and there are a variety of reasons why this occurs, which the practitioner should understand. In some instances failed implants may require removal and, therefore, practitioners should be aware of techniques that can be used to remove failed implants to potentially enable future rehabilitation of an edentulous region.
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Affiliation(s)
| | | | | | - L Addy
- Cardiff Dental Hospital, Heath Park, Cardiff, CF14 4XY
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12
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Hajji M, Franzen R, Grümer S, Modabber A, Nasher R, Prescher A, Gutknecht N. Removal of Dental Implants Using the Erbium,Chromium:Yttrium-Scandium-Gallium-Garnet Laser and the Conventional Trephine Bur: An in Vitro Comparative Study. Photomed Laser Surg 2017; 34:61-7. [PMID: 26840550 DOI: 10.1089/pho.2015.3981] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVE The purpose of this study was to compare the conventional trephine bur and the Erbium,chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser in removing implants in terms of the volume of removed bone, duration of the procedure, and morphological changes on the bone surface. MATERIALS AND METHODS Three human mandibles were utilized, and four implants were inserted in each mandible using a drilling handpiece and burs. The implants were divided into two groups (n = 6) in which two implants from each mandible were removed using a trephine bur running at 1200 rounds per minute (rpm) with water irrigation. The remaining implants (n = 6) were removed with Er,Cr:YSGG laser (power 6 W, frequency 20 Hz, pulse duration 50 μs, water 60, air 30). The volume of bone loss was calculated by filling the holes with mercury and measuring its volume. The preparation time was measured with a digital stopwatch and the postoperative bone surfaces were examined under a scanning electron microscope (SEM). RESULTS The laser group exhibited a smaller amount of bone loss than the trephine bur group, whereas the latter required a shorter time of preparation. SEM revealed empty trabecular spaces with no signs of carbonization and well-defined edges in the laser group, whereas the trephine group displayed a surface covered with a smear layer and microcracks. CONCLUSIONS The Er,Cr:YSGG laser provides superior results over the trephine bur in terms of bone preservation, thermal damage, and cutting efficiency.
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Affiliation(s)
- Mohammad Hajji
- 1 Department of Conservative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital , Aachen, Germany
| | - Rene Franzen
- 1 Department of Conservative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital , Aachen, Germany
| | - Stefan Grümer
- 1 Department of Conservative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital , Aachen, Germany
| | - Ali Modabber
- 2 Department of Oral and Maxillofacial Surgery, RWTH Aachen University Hospital , Aachen, Germany
| | - Riman Nasher
- 1 Department of Conservative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital , Aachen, Germany
| | - Andreas Prescher
- 3 Department of Molecular and Cellular Anatomy, RWTH Aachrn University Hospital , Aachen, Germany
| | - Norbert Gutknecht
- 1 Department of Conservative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital , Aachen, Germany
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Aoki A, Mizutani K, Schwarz F, Sculean A, Yukna RA, Takasaki AA, Romanos GE, Taniguchi Y, Sasaki KM, Zeredo JL, Koshy G, Coluzzi DJ, White JM, Abiko Y, Ishikawa I, Izumi Y. Periodontal and peri-implant wound healing following laser therapy. Periodontol 2000 2017; 68:217-69. [PMID: 25867988 DOI: 10.1111/prd.12080] [Citation(s) in RCA: 194] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2014] [Indexed: 12/18/2022]
Abstract
Laser irradiation has numerous favorable characteristics, such as ablation or vaporization, hemostasis, biostimulation (photobiomodulation) and microbial inhibition and destruction, which induce various beneficial therapeutic effects and biological responses. Therefore, the use of lasers is considered effective and suitable for treating a variety of inflammatory and infectious oral conditions. The CO2 , neodymium-doped yttrium-aluminium-garnet (Nd:YAG) and diode lasers have mainly been used for periodontal soft-tissue management. With development of the erbium-doped yttrium-aluminium-garnet (Er:YAG) and erbium, chromium-doped yttrium-scandium-gallium-garnet (Er,Cr:YSGG) lasers, which can be applied not only on soft tissues but also on dental hard tissues, the application of lasers dramatically expanded from periodontal soft-tissue management to hard-tissue treatment. Currently, various periodontal tissues (such as gingiva, tooth roots and bone tissue), as well as titanium implant surfaces, can be treated with lasers, and a variety of dental laser systems are being employed for the management of periodontal and peri-implant diseases. In periodontics, mechanical therapy has conventionally been the mainstream of treatment; however, complete bacterial eradication and/or optimal wound healing may not be necessarily achieved with conventional mechanical therapy alone. Consequently, in addition to chemotherapy consisting of antibiotics and anti-inflammatory agents, phototherapy using lasers and light-emitting diodes has been gradually integrated with mechanical therapy to enhance subsequent wound healing by achieving thorough debridement, decontamination and tissue stimulation. With increasing evidence of benefits, therapies with low- and high-level lasers play an important role in wound healing/tissue regeneration in the treatment of periodontal and peri-implant diseases. This article discusses the outcomes of laser therapy in soft-tissue management, periodontal nonsurgical and surgical treatment, osseous surgery and peri-implant treatment, focusing on postoperative wound healing of periodontal and peri-implant tissues, based on scientific evidence from currently available basic and clinical studies, as well as on case reports.
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14
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Effects on Bone Tissue After Osteotomy with Different High-Energy Lasers: AnEx VivoStudy. Photomed Laser Surg 2016; 34:291-6. [DOI: 10.1089/pho.2015.3917] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Panduric DG, Juric IB, Music S, Molčanov K, Sušic M, Anic I. Morphological and ultrastructural comparative analysis of bone tissue after Er:YAG laser and surgical drill osteotomy. Photomed Laser Surg 2016; 32:401-8. [PMID: 24992274 DOI: 10.1089/pho.2014.3711] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVE The purpose of this study was to analyze morphological, chemical, and crystallographic changes of bone tissue after osteotomy performed with an erbium:yttrium-aluminium-garnet (Er:YAG) laser and a low speed pilot drill. MATERIALS AND METHODS Bone blocks were prepared from porcine ribs, and on each block, two tunnel preparations were performed using the Er:YAG laser (pulse energy: 1000 mJ, pulse duration: 300 μs, pulse repetition rate: 20 Hz) or the low-speed surgical pilot drill. The morphological changes of the cortical and the spongious surface of the tunnel preparations were analyzed under the field emission scanning electron microscopy (FE-SEM) at low and high resolution. The distribution and the level of chemical elements in the treated surfaces were evaluated by qualitative and semiquantitative energy dispersive x-ray analysis (SEM-EDX). Diffraction x-ray analysis was used to detect any differences and thermally induced modifications of hydroxyapatite crystals. RESULTS FE-SEM revealed sharp edges of the Er:YAG preparations, with empty intertrabecular spaces and no signs of carbonization. In the drill group, the surface of the preparations was smooth, completely covered with smear layer and microcracks, and with hairy-like irregularities on the edges. SEM-EDX analysis did not reveal any differences in the number of specific chemical elements between the laser and the drill group. There were no thermally induced modifications of hydroxyapatite crystal structure in the bone tissue in either group. CONCLUSIONS The Er:YAG laser ablation did not cause any chemical or crystallographic changes of the bone tissue. Compared with the drill, Er:YAG laser created well-defined edges of the preparations, and cortical bone had no smear layer.
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Affiliation(s)
- Dragana Gabric Panduric
- 1 Department of Oral Surgery, School of Dental Medicine, University of Zagreb , Zagreb, Croatia
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Esteves JC, de Souza Faloni AP, Macedo PD, Nakata PB, Chierici Marcantonio RA, Intini G, Marcantonio E. Effects on Bone Repair of Osteotomy With Drills or With Erbium, Chromium: Yttrium-Scandium-Gallium-Garnet Laser: Histomorphometric and Immunohistochemical Study. J Periodontol 2015; 87:452-60. [PMID: 26693695 DOI: 10.1902/jop.2015.150406] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND The erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser has been widely used in the dental clinic; however, few studies have demonstrated the advantages of the use of this laser for bone osteotomies. The purpose of this study is to evaluate and compare the bone repair process of defects generated by the Er,Cr:YSGG laser or conventional drills. METHODS Ninety-six rats were divided into two groups of 48 animals (drill group and laser group). After surgical exposure of the right tibia, the animals were subjected to a 2-mm-diameter osteotomy created by conventional drills (drill group) or by the Er,Cr:YSGG laser (laser group). The animals were sacrificed 0, 3, 7, 14, 30, and 60 days after the creation of the defect, and histologic sections were obtained and used for histomorphometric and immunohistochemical analyses for the detection of osteocalcin, osteoprotegerin, receptor activator of nuclear factor κ-B ligand, vascular endothelial growth factor, and caspase-3. RESULTS The osteotomy with the drill produced well-delimited and smooth walls, whereas the osteotomies in the laser group were irregular and presented an amorphous basophilic line and bone necrosis that was slowly resorbed during the repair process. Despite these characteristics, bone repair was similar between groups at various time points, and, at 60 days, the defects in both groups were completely repaired by newly formed bone. CONCLUSION The repair process of osteotomies created by the Er,Cr:YSGG laser, despite producing thermal damage to bone tissue, is comparable to that with conventional drills.
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Affiliation(s)
- Jônatas Caldeira Esteves
- Department of Dental Clinic, Dental School, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ana Paula de Souza Faloni
- Department of Health Sciences, Implantology Postgraduation Course, University Center of Araraquara (UNIARA), Araraquara, São Paulo, Brazil
| | - Paula Delello Macedo
- Department of Diagnosis and Surgery, Division of Periodontology, Araraquara Dental School, Univ Estadual Paulista (UNESP), Araraquara, São Paulo, Brazil
| | - Patrícia Borges Nakata
- Department of Diagnosis and Surgery, Division of Periodontology, Araraquara Dental School, Univ Estadual Paulista (UNESP), Araraquara, São Paulo, Brazil
| | - Rosemary Adriana Chierici Marcantonio
- Department of Diagnosis and Surgery, Division of Periodontology, Araraquara Dental School, Univ Estadual Paulista (UNESP), Araraquara, São Paulo, Brazil
| | - Giuseppe Intini
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Harvard University, Boston, MA.,Harvard Stem Cell Institute, Cambridge, MA
| | - Elcio Marcantonio
- Department of Diagnosis and Surgery, Division of Periodontology, Araraquara Dental School, Univ Estadual Paulista (UNESP), Araraquara, São Paulo, Brazil
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Benetti C, Ana PA, Bachmann L, Zezell DM. Mid-Infrared Spectroscopy Analysis of the Effects of Erbium, Chromium:Yattrium-Scandium-Gallium-Garnet (Er,Cr:YSGG) Laser Irradiation on Bone Mineral and Organic Components. APPLIED SPECTROSCOPY 2015; 69:1496-1504. [PMID: 26555304 DOI: 10.1366/14-07726] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The effects of varying the energy density of a high-intensity erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser on the mineral and organic components of bone tissue were evaluated using Fourier transform infrared spectroscopy. Bone samples obtained from the tibias of rabbits were irradiated with five energy densities (3, 6, 8, 12, and 15 J/cm(2)), and the effects on the carbonate to phosphate ratio and in the organic components were compared with those of nonirradiated samples. The increased temperature during the laser irradiation was also measured using infrared thermography to relate the observed spectral changes to the laser thermal effects. The analyses of the infrared spectra suggests that the irradiation with Er,Cr:YSGG promoted changes in bone tissue in both the mineral and organic components that depend on the laser energy density, pointing to the importance of using the proper energy density in clinical procedures.
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Affiliation(s)
- Carolina Benetti
- Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP), Centro de Lasers e Aplicacões, Av. Prof. Lineu Prestes, 2242, Cidade Universitária, CEP 05508-000, São Paulo, SP, Brazil
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Franzen R, Rashidisangsary B, Ozturan S, Vanweersch L, Gutknecht N. Intrapulpal temperature changes during root surface irradiation with dual-wavelength laser (2780 and 940 nm): in vitro study. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:018002. [PMID: 25602781 DOI: 10.1117/1.jbo.20.1.018002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 12/17/2014] [Indexed: 06/04/2023]
Abstract
This work reports that the ablation volume and rate of porcine skin changed significantly with the change of skin water content. Under the same laser irradiation conditions (532 nm Nd:YAG laser, pulse width = 11.5 ns, pulse energy = 1.54 J, beam radius = 0.54 mm), the ablation volume dropped by a factor of 4 as the skin water content decreased from 40 wt. % (native) to 19 wt. % with a change in the ablation rate below and above around 25 wt. %. Based on the ablation characteristics observed by in situ shadowgraph images and the calculated tissue temperatures, it is considered that an explosive rupture by rapid volumetric vaporization of water is responsible for the ablation of the high water content of skin, whereas thermal disintegration of directly irradiated surface layer is responsible for the low water content of skin.
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Affiliation(s)
- Rene Franzen
- RWTH Aachen University Hospital, Department of Conservative Dentistry, Periodontology, and Preventive Dentistry, Pauwelsstrasse 30, 52074 Aachen, Germany
| | - Borna Rashidisangsary
- RWTH Aachen University Hospital, Department of Conservative Dentistry, Periodontology, and Preventive Dentistry, Pauwelsstrasse 30, 52074 Aachen, Germany
| | - Seda Ozturan
- Biruni University, Faculty of Dentistry, Department of Periodontology, Topkapi 34010, Istanbul, Turkey
| | - Leon Vanweersch
- RWTH Aachen University Hospital, Department of Conservative Dentistry, Periodontology, and Preventive Dentistry, Pauwelsstrasse 30, 52074 Aachen, Germany
| | - Norbert Gutknecht
- RWTH Aachen University Hospital, Department of Conservative Dentistry, Periodontology, and Preventive Dentistry, Pauwelsstrasse 30, 52074 Aachen, Germany
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Abstract
Navigation technology is applied successfully in oral and maxillofacial surgery. Laser beams are used for caries removal. With nanodentistry, it is possible to maintain comprehensive oral health care. Nanorobots induce oral analgesia, desensitize teeth, and manipulate the tissue. They can also be used for preventive, restorative, and curative procedures. Strategies to engineer tissue can be categorized into 3 major classes: conductive, inductive, and cell transplantation approaches. Several populations of cells with stem cell properties have been isolated from different parts of the tooth.
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Affiliation(s)
- Roya Zandparsa
- Tufts University School of Dentistry, Postgraduate Prosthodontics Division, 1 Kneeland Street, Boston, MA 02111, USA.
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Plötz C, Schelle F, Bourauel C, Frentzen M, Meister J. Ablation of porcine bone tissue with an ultrashort pulsed laser (USPL) system. Lasers Med Sci 2014; 30:977-83. [PMID: 24458532 DOI: 10.1007/s10103-014-1520-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 01/08/2014] [Indexed: 11/29/2022]
Abstract
Ultrashort pulsed lasers (USPLs) represent a new generation of laser systems in the field of biophotonical applications. In terms of a pilot project, the study was carried out to evaluate the ablation parameters of bone tissue regarding the medical use of such a laser technology in dentistry. Specimens from ribs of freshly slaughtered pigs were assembled and irradiated with an USP Nd:YVO4 laser (pulse duration 8 ps at 1,064 nm with repetition rates between 50 and 500 kHz) using eligible average output powers in the range of 3.5-9 W and fluences between 1 and 2.5 J/cm(2). Square-shaped cavities of 1-mm edge length in the bone compacta were created employing a scanner system. Cavities were analyzed with an optical profilometer to determine the ablated volume. Ablation rate was calculated by the ablated volume and the recorded irradiation time by the scanner software. Additionally, samples were examined histologically to investigate side effects of the surrounding tissue. Formed cavities showed a precise and sharp-edged appearance in bone compacta. Optimized ablation rate of 5.2 mm(3)/min without any accompanying side effects was obtained with an average output power of 9 W, a pulse repetition rate of 500 kHz, and an applied fluence of 2.5 J/cm(2). Provided that the used laser system will be advanced and adjusted for clinical applications, the outcome of this study shows auspicious possibilities for the use of USPL systems in the preparation of bone tissue.
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Affiliation(s)
- Christina Plötz
- Department of Operative and Preventive Dentistry, Dental Faculty, Bonn University, Welschnonnenstrasse 17, 53111, Bonn, Germany
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Öznurhan F, Ölmez A. Nanoleakage in primary teeth prepared by laser irradiation or bur. Lasers Med Sci 2012; 28:1099-105. [PMID: 22968783 DOI: 10.1007/s10103-012-1204-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 09/03/2012] [Indexed: 10/27/2022]
Abstract
The aim of this in vitro study was to analyze hybrid layer and nanoleakage of composite resin restorations in cavities prepared by either Er,Cr:YSGG laser or bur, followed by acid etching in primary teeth. Ten extracted primary molar teeth were randomly allocated into two groups consisting of ten cavities according to surface treatment regimen: Er,Cr:YSGG laser + acid etching(group 1) and bur + acid etching(group 2). Restorations of all samples were completed. Then, teeth were sectioned and immersed to ammoniacal silver nitrate solution. After polishing, hybrid layer thicknesses were examined under scanning electron microscopy (SEM) and ion analysis was carried out with SEM/energy dispersive X-ray spectroscopy preparation in terms of nanoleakage. Hybrid layer thickness and the amount of silver ions were assessed for the acid-etched groups. The collected data were analyzed with independent sample t test and Spearman's rank correlation. In groups 1 and 2, the mean hybrid layer thicknesses were 4.25 ± 1.41 and 5.24 ± 1.07 μm and the silver ion percentages were 10.97 ± 13.81 and 22.79 ± 21.62 %, respectively. Although no significant correlation was observed between the increase of hybrid layer thickness and the amount of silver ions, more silver ions were observed in group 2 (p < 0.05). According to the results of this study, acid-etched cavities prepared with laser promoted better results when compared to the acid-etched cavities prepared with bur.
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Affiliation(s)
- Fatih Öznurhan
- Department of Pediatric Dentistry, Faculty of Dentistry, Cumhuriyet University School of Dentistry, 58140, Kampüs, Sivas, Turkey.
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Adebayo OA, Burrow MF, Tyas MJ, Palamara J. Effect of Tooth Surface Preparation on the Bonding of Self-Etching Primer Adhesives. Oper Dent 2012; 37:137-49. [DOI: 10.2341/11-172-l] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Clinical Relevance
The effectiveness of some self-etching primer adhesive systems is not significantly affected by the mode of rotary instrumentation used in dentin preparation.
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Effects of the Er,Cr:YSGG laser on bone and soft tissue in a rat model. Lasers Med Sci 2011; 27:95-102. [DOI: 10.1007/s10103-011-0920-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Accepted: 03/21/2011] [Indexed: 10/18/2022]
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Stübinger S, Nuss K, Pongratz M, Price J, Sader R, Zeilhofer HF, von Rechenberg B. Comparison of Er:YAG laser and piezoelectric osteotomy: An animal study in sheep. Lasers Surg Med 2011; 42:743-51. [PMID: 20886507 DOI: 10.1002/lsm.20946] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVES It was the aim of this study to compare the feasibility of complete osteotomy of long bones in sheep using a newly designed variable square pulsed Er:YAG laser and piezoelectric surgery. In addition to uneventful bone healing after laser osteotomy, the goal was to assess the possibility to cut thick bony structures with both techniques in a surgically acceptable time frame of 2-3 minutes. MATERIAL AND METHODS A tibia midshaft osteotomy was performed in 24 sheep using either an Er:YAG laser (n = 12) or piezoelectric device (n = 12). Laser and piezoelectric groups were divided in two subgroups (n = 6) with sheep sacrificed after 2 and 3 months, respectively. A complete radiological, histological and histomorphometric analysis was performed to compare the course of bone/fracture healing and remodelling. RESULTS Laser and piezoelectric osteotomies of the sheep tibia up to a depth of 22 mm were possible without any thermal damage. Radiological and histological results after 2 months showed primary gap healing with distinct periosteal callus formation on the transcortex. After 3 months, radiological and histological analysis revealed less callus formation on the transcortex, with almost no visible osteotomy gap and a distinct formation of lamellar bone crossing the original osteotomy gap. CONCLUSION Er:YAG laser osteotomy can successfully be used in long bones with a depth of up to 22 mm, thus challenging the dogma of adverse effects of laser osteotomy due to thermal or other damages.
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Affiliation(s)
- Stefan Stübinger
- Competence Center for Applied Biotechnology and Molecular Medicine, University of Zürich, Winterthurerstr. 190, CH-8057 Zürich, Switzerland.
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Lee SY, Piao C, Heo SJ, Koak JY, Lee JH, Kim TH, Kim MJ, Kwon HB, Kim SK. A comparison of bone bed preparation with laser and conventional drill on the relationship between implant stability quotient (ISQ) values and implant insertion variables. J Adv Prosthodont 2010; 2:148-53. [PMID: 21264194 PMCID: PMC3024505 DOI: 10.4047/jap.2010.2.4.148] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 11/29/2010] [Accepted: 12/13/2010] [Indexed: 11/30/2022] Open
Abstract
PURPOSE The aim of this study was to investigate a comparison of implant bone bed preparation with Er,Cr:YSGG laser and conventional drills on the relationship between implant stability quotient (ISQ) values and implant insertion variables. MATERIALS AND METHODS Forty implants were inserted into two different types of pig rib bone. One group was prepared with conventional drills and a total of 20 implants were inserted into type I and type II bone. The other group was prepared with a Er,Cr:YSGG laser and a total of 20 implants were inserted into type I and type II bone. ISQ, maximum insertion torque, angular momentum, and insertion torque energy values were measured. RESULTS The mean values for variables were significantly higher in type I bone than in type II bone (P < .01). In type I bone, the ISQ values in the drill group were significantly higher than in the laser group (P < .05). In type II bone, the ISQ values in the laser group were significantly higher than in the drill group (P < .01). In both type I and type II bone, the maximum insertion torque, total energy, and total angular momentum values between the drill and laser groups did not differ significantly (P ≥ .05). The ISQ values were correlated with maximum insertion torque (P < .01, r = .731), total energy (P < .01, r = .696), and angular momentum (P < .01, r = .696). CONCLUSION Within the limitations of this study, the effects of bone bed preparation with Er,Cr:YSGG laser on the relationship between implant stability quotient (ISQ) values and implant insertion variables were comparable to those of drilling.
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Affiliation(s)
- Su-Young Lee
- Department of Prosthodontics and Dental Research Institute, Seoul National University Dental Hospital, School of Dentistry, Seoul National University, Seoul, Korea
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Hakki SS, Korkusuz P, Berk G, Dundar N, Saglam M, Bozkurt B, Purali N. Comparison of Er,Cr:YSGG laser and hand instrumentation on the attachment of periodontal ligament fibroblasts to periodontally diseased root surfaces: an in vitro study. J Periodontol 2010; 81:1216-25. [PMID: 20476883 DOI: 10.1902/jop.2010.090715] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND This study investigates the effects of erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser irradiation and hand instrumentation on the attachment of periodontal ligament (PDL) fibroblasts to periodontally involved root surfaces. METHODS Twenty-four single-rooted periodontally involved human teeth (test groups), and six healthy premolar teeth extracted for orthodontic reasons (control group) were included in this study. A total of 45 root slices were obtained from all selected teeth and assigned to the following five groups: 1) untreated healthy group (+control); 2) untreated periodontally diseased group (-control); 3) hand instrumentation group (scaled Gracey); 4) laser I, Er,Cr:YSGG laser irradiation setting-I (short pulse); and 5) laser II, Er,Cr:YSGG laser irradiation setting-II (long pulse). All of the root slices were autoclaved in phosphate buffered saline and slices were placed onto cell culture inserts. PDL fibroblasts were placed at the density of 80,000 cells on the root plate (5 x 6 mm) and incubated for 48 hours and transferred to 24-well plates. The attachment PDL fibroblasts on the root plates were observed using confocal microscopy (at 12 hours and on days 3 and 7) and scanning electron microscopy (at 12 hours and day 3). 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyl-tetrazolium bromide assay was performed on day 5 for PDL fibroblast survival. RESULTS 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyl-tetrazolium bromide assay shows that whereas laser-treated specimens showed a significantly higher cell density, the Gracey-treated group showed a lower cell density compared to the positive control group (P <0.05). Based on confocal microscopy, apparent reduction was observed in the attachment of PDL cells to the periodontally diseased root surfaces. In the laser and Gracey groups, cells looked well-oriented to the root surfaces. Laser-treated groups provided suitable environment for cell adhesion and growth. Laser I treatment was more favorable for the attachment of PDL compared to scaled Gracey, laser II, and even healthy root surfaces. CONCLUSION The results of the study indicate that short-pulse laser setup (laser I) looks more promising regarding the attachment, spreading, and orientation of PDL cells.
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Affiliation(s)
- Sema S Hakki
- Department of Periodontology, Faculty of Dentistry, Selçuk University, Konya, Turkey.
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Jepsen S, Deschner J, Braun A, Schwarz F, Eberhard J. Calculus removal and the prevention of its formation. Periodontol 2000 2010; 55:167-88. [DOI: 10.1111/j.1600-0757.2010.00382.x] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Schwarz F, Aoki A, Sculean A, Becker J. The impact of laser application on periodontal and peri-implant wound healing. Periodontol 2000 2010; 51:79-108. [PMID: 19878471 DOI: 10.1111/j.1600-0757.2009.00301.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Romeo U, Del Vecchio A, Palaia G, Tenore G, Visca P, Maggiore C. Bone damage induced by different cutting instruments--an in vitro study. Braz Dent J 2009; 20:162-8. [PMID: 19738951 DOI: 10.1590/s0103-64402009000200013] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2009] [Accepted: 02/13/2009] [Indexed: 11/21/2022] Open
Abstract
The aim of this study was to compare the peripheral bone damage induced by different cutting systems. Four devices were tested: Er:YAG laser (2.94 mm), Piezosurgery, high-speed drill and low-speed drill. Forty-five bone sections, divided into 9 groups according to different parameters, were taken from pig mandibles within 1 h post mortem. Specimens were fixed in 10% buffered formalin, decalcified and cut in thin sections. Four different parameters were analyzed: cut precision, depth of incision, peripheral carbonization and presence of bone fragments. For statistical analysis, the Kruskal-Wallis test was applied to assess equality of sample medians among groups. All sections obtained with the Er:YAG laser showed poor peripheral carbonization. The edges of the incisions were always well-shaped and regular, no melting was observed. Piezosurgery specimens revealed superficial incisions without thermal damage but with irregular edges. The sections obtained by traditional drilling showed poor peripheral carbonization, especially if obtained at lower speed. There was statistically significant differences (p<0.01) among the cutting systems for all analyzed parameters. Er:YAG laser, gave poor peripheral carbonization, and may be considered an effective method in oral bone biopsies and permits to obtain clear and readable tissue specimens.
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Affiliation(s)
- Umberto Romeo
- Department of Odontostomatological Science, Sapienza University of Rome, Rome, Italy.
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Kilinc E, Roshkind DM, Antonson SA, Antonson DE, Hardigan PC, Siegel SC, Thomas JW. Thermal Safety of Er:YAG and Er,Cr:YSGG Lasers in Hard Tissue Removal. Photomed Laser Surg 2009; 27:565-70. [DOI: 10.1089/pho.2008.2335] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Evren Kilinc
- Nova Southeastern University College of Dental Medicine, Department of Cariology and Restorative Dentistry, Fort Lauderdale, Florida
| | | | - Sibel A. Antonson
- University at Buffalo State University of New York School of Dental Medicine, Department of Restorative Dentistry, Buffalo, New York
| | - Donald E. Antonson
- University at Buffalo State University of New York School of Dental Medicine, Department of Restorative Dentistry, Buffalo, New York
| | - Patrick C. Hardigan
- Nova Southeastern University Heath Professions Division, Fort Lauderdale, Florida
| | - Sharon C. Siegel
- Nova Southeastern University College of Dental Medicine, Department of Prosthodontics, Fort Lauderdale, Florida
| | - James W. Thomas
- University of Colorado, Department of Orthodontics, Aurora, Colorado
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Romanos GE, Gutknecht N, Dieter S, Schwarz F, Crespi R, Sculean A. Laser wavelengths and oral implantology. Lasers Med Sci 2009; 24:961-70. [DOI: 10.1007/s10103-009-0676-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2009] [Accepted: 04/10/2009] [Indexed: 10/20/2022]
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Kusek ER. The use of laser technology (Er;Cr:YSGG) and stereolithography to aid in the placement of a subperiosteal implant: case study. J ORAL IMPLANTOL 2009; 35:5-11. [PMID: 19288882 DOI: 10.1563/1548-1336-35.1.5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The use of laser technology has helped this clinician to provide treatment with less postoperative pain and increased healing. The subperiosteal implant is a modality that has been used for several decades, although its popularity has declined in favor of endosseous dental implants. In some instances, however, it remains the treatment of choice, specifically in the atrophic mandible (where placement of endosseous implants is not possible) or when placement would increase the chances of jaw fracture. This article reports the case of a patient rehabilitated using a simplified surgical protocol involving laser surgery and stereolithography.
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Sohn DS, Lee JS, An KM, Romanos GE. Erbium, chromium:yttrium-scandium-gallium-garnet laser-assisted sinus graft procedure. Lasers Med Sci 2009; 24:673-7. [PMID: 19219483 DOI: 10.1007/s10103-009-0645-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Accepted: 01/11/2009] [Indexed: 11/26/2022]
Abstract
The possibility of using lasers in the field of dentistry has been a subject of investigation. There are few reports that any laser systems have been used for bony window osteotomy by direct sinus grafting. In this study, erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser of various laser systems was used for 12 sinus bone grafts in ten patients, and the efficiency of the laser was evaluated according to the osteotomy time and the rate of sinus membrane perforation in the clinical results; the mechanism is described. Eight of the 12 procedures were performed by direct sinus grafting with the Er,Cr:YSGG laser without membrane perforation (perforation ratio 33.3%). Operating time for bony window osteotomy with laser alone was 2-7 minutes [3 min 24 s on average; 3.4 +/- 1.4 min (mean +/- standard deviation)], and all the implants placed immediately were successful.
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Affiliation(s)
- Dong-Seok Sohn
- Department of Dentistry & Oral and Maxillofacial Surgery, Daegu Catholic University Hospital, Namgu, Daegu, Republic of Korea.
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Effects of root planing procedures with hand instrument or erbium, chromium:yttrium–scandium–gallium–garnet laser irradiation on the root surfaces: a comparative scanning electron microscopy study. Lasers Med Sci 2009; 25:345-53. [DOI: 10.1007/s10103-009-0643-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Accepted: 01/07/2009] [Indexed: 11/26/2022]
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Rode AV, Gamaly EG, Luther-Davies B, Taylor BT, Graessel M, Dawes JM, Chan A, Lowe RM, Hannaford P. Precision ablation of dental enamel using a subpicosecond pulsed laser. Aust Dent J 2008; 48:233-9. [PMID: 14738125 DOI: 10.1111/j.1834-7819.2003.tb00036.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In this study we report the use of ultra-short-pulsed near-infrared lasers for precision laser ablation of freshly extracted human teeth. The laser wavelength was approximately 800nm, with pulsewidths of 95 and 150fs, and pulse repetition rates of 1kHz. The laser beam was focused to an approximate diameter of 50microm and was scanned over the tooth surface. The rise in the intrapulpal temperature was monitored by embedded thermocouples, and was shown to remain below 5 degrees C when the tooth was air-cooled during laser treatment. The surface preparation of the ablated teeth, observed by optical and electron microscopy, showed no apparent cracking or heat effects, and the hardness and Raman spectra of the laser-treated enamel were not distinguishable from those of native enamel. This study indicates the potential for ultra-short-pulsed lasers to effect precision ablation of dental enamel.
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Affiliation(s)
- A V Rode
- Research School of Physical Science and Engineering, Australian National University, Canberra, Australian Capital Territory
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38
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Stübinger S, Landes C, Seitz O, Sader R. Er:YAG Laser Osteotomy for Intraoral Bone Grafting Procedures: A Case Series With a Fiber-Optic Delivery System. J Periodontol 2007; 78:2389-94. [DOI: 10.1902/jop.2007.070162] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Franzen R, Esteves-Oliveira M, Meister J, Wallerang A, Vanweersch L, Lampert F, Gutknecht N. Decontamination of deep dentin by means of erbium, chromium:yttrium-scandium-gallium-garnet laser irradiation. Lasers Med Sci 2007; 24:75-80. [DOI: 10.1007/s10103-007-0522-2] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2007] [Accepted: 10/22/2007] [Indexed: 11/28/2022]
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Schwarz F, Nuesry E, Bieling K, Herten M, Becker J. Influence of an Erbium, Chromium-Doped Yttrium, Scandium, Gallium, and Garnet (Er,Cr:YSGG) Laser on the Reestablishment of the Biocompatibility of Contaminated Titanium Implant Surfaces. J Periodontol 2006; 77:1820-7. [PMID: 17076606 DOI: 10.1902/jop.2006.050456] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The aim of the present study was to evaluate the influence of an erbium, chromium-doped yttrium, scandium, gallium, and garnet (Er,Cr:YSGG laser [ERCL]) on 1) the surface structure and biocompatibility of titanium implants and 2) the removal of plaque biofilms and reestablishment of the biocompatibility of contaminated titanium surfaces. METHODS Intraoral splints were used to collect an in vivo supragingival biofilm on sand-blasted and acid-etched titanium disks for 24 hours. ERCL was used at an energy output of 0.5, 1.0, 1.5, 2.0, and 2.5 W for the irradiation of 1) non-contaminated (20 and 25 Hz) and 2) plaque-contaminated (25 Hz) titanium disks. Unworn and untreated non-irradiated, sterile titanium disks served as untreated controls (UC). Specimens were incubated with SaOs-2 osteoblasts for 6 days. Treatment time, residual plaque biofilm (RPB) areas (%), mitochondrial cell activity (MA) (counts per second), and cell morphology/surface changes (scanning electron microscopy [SEM]) were assessed. RESULTS 1) ERCL using either 0.5, 1.0, 1.5, 2.0, or 2.5 W at both 20 and 25 Hz resulted in comparable mean MA values as measured in the UC group. A monolayer of flattened SaOs-2 cells showing complete cytoplasmatic extensions and lamellopodia was observed in both ERCL and UC groups. 2) Mean RPB areas decreased significantly with increasing energy settings (53.8 +/- 2.2 at 0.5 W to 9.8 +/- 6.2 at 2.5 W). However, mean MA values were significantly higher in the UC group. CONCLUSION Within the limits of the present study, it was concluded that even though ERCL exhibited a high efficiency to remove plaque biofilms in an energy-dependent manner, it failed to reestablish the biocompatibility of contaminated titanium surfaces.
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Affiliation(s)
- Frank Schwarz
- Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany.
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41
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Abstract
BACKGROUND Despite the large number of publications, there is still controversy among clinicians regarding the application of dental lasers to the treatment of chronic periodontitis. The purpose of this review is to analyze the peer-reviewed research literature to determine the state of the science concerning the application of lasers to common oral soft tissue problems, root surface detoxification, and the treatment of chronic periodontitis. METHODS A comprehensive computer-based search combined the following databases into one search: Medline, Current Contents, and the Cumulated Index of Nursing and Allied Health. This search also used key words. In addition, hand searches were done for several journals not cataloged in the databases, and the reference lists from published articles were checked. All articles were considered individually to eliminate non-peer-reviewed articles, those dealing with commercial laser technology, and those considered by the author to be purely opinion articles, leaving 278 possible articles. RESULTS There is a considerable conflict in results for both laboratory studies and clinical trials, even when using the same laser wavelength. A meaningful comparison between various clinical studies or between laser and conventional therapy is difficult at best and likely impossible at the present. Reasons for this dilemma are several, such as different laser wavelengths; wide variations in laser parameters; insufficient reporting of parameters that, in turn, does not allow calculation of energy density; differences in experimental design, lack of proper controls, and differences in severity of disease and treatment protocols; and measurement of different clinical endpoints. CONCLUSIONS Based on this review of the literature, there is a great need to develop an evidence-based approach to the use of lasers for the treatment of chronic periodontitis. Simply put, there is insufficient evidence to suggest that any specific wavelength of laser is superior to the traditional modalities of therapy. Current evidence does suggest that use of the Nd:YAG or Er:YAG wavelengths for treatment of chronic periodontitis may be equivalent to scaling and root planing (SRP) with respect to reduction in probing depth and subgingival bacterial populations. However, if gain in clinical attachment level is considered the gold standard for non-surgical periodontal therapy, then the evidence supporting laser-mediated periodontal treatment over traditional therapy is minimal at best. Lastly, there is limited evidence suggesting that lasers used in an adjunctive capacity to SRP may provide some additional benefit.
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Affiliation(s)
- Charles M Cobb
- Department of Periodontics, School of Dentistry, University of Missouri, Kansas City, MO 64113, USA.
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Chang J, Platt JA, Yi K, Cochran MA. Quantitative Comparison of the Water Permeable Zone Among Four Types of Dental Adhesives Used with a Dual-cured Composite. Oper Dent 2006; 31:346-53. [PMID: 16802643 DOI: 10.2341/05-40] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Clinical Relevance
When placing a dual-cured composite, variation in the permeability of adhesive interfaces may affect bonding quality and longevity.
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Affiliation(s)
- Juhea Chang
- Juhea Chang, DDS, MSD, Graduate Operative Department, Indiana University School of Dentistry, Indianapolis, IN, USA
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Affiliation(s)
- Akira Aoki
- Department of Hard Tissue Engineering, Tokyo Medical and Dental University Graduate School, JapanDepartment of Hard Tissue Engineering, Tokyo Medical and Dental University Graduate School, Japan
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44
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Abstract
The successful construction of removable full and partial dentures depends mainly on the preoperative evaluation of the supporting hard and soft tissue structures and their proper preparation. Stability, retention, function, and esthetics of removable prostheses may be enhanced by proper laser manipulation of the soft tissues and underlying osseous structure. Compared with conventional techniques, laser treatment has many advantages. More predictable postoperative healing results and shortened treatment time may be achieved when lasers are integrated into the treatment plan for construction of removable prosthetic devices.
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Affiliation(s)
- Gabi Kesler
- Dental Laser Center, Post Office Box 8121, Petah Tikva, 49651, Israel.
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45
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Abstract
Erbium hard tissue lasers have the capability to prepare enamel, dentin, caries, cementum, and bone in addition to cutting soft tissue. The ability of hard tissue lasers to reduce or eliminate vibrations, the audible whine of drills, microfractures, and some of the discomfort that many patients fear and commonly associate with high-speed handpieces is impressive. In addition, these lasers can be used with a reduced amount of local anesthetic for many procedures. Today, these instruments have evolved from their initial use for all classes of cavity preparations to their ability for removing soft tissue, their usefulness in the disinfection of bacteria within endodontic canals, and most recently, as an alternative to the high speed handpiece for the removal of bone in oral and maxillofacial surgery. In addition, recent research has centered on the value of the erbium family of laser wavelengths in periodontics, including the removal of calculus.
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Affiliation(s)
- Glenn van As
- Canyon Dental Clinic, 3167 Mountain Highway, North Vancouver, BC V7K 2H4, Canada.
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46
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Coluzzi DJ. LASERS IN DENTISTRY. J Am Dent Assoc 2004; 135:698, 700, 702; author reply 702, 704, 706. [PMID: 15270145 DOI: 10.14219/jada.archive.2004.0266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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47
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Abstract
BACKGROUND During the last two decades, much has been written in both the scientific literature and the popular press about lasers and their use in the dental office. Both soft- and hard-tissue applications have been discussed, including frenectomy, gingival contouring, caries removal and bleaching. OVERVIEW Almost one-third of patients surveyed by the American Dental Association in the late 1990s thought it was very important that their dentists have lasers, which could put pressure on dentists to invest in this tool to attract patients. The authors describe the different types of dental lasers and examine the science behind their applications in dentistry. CONCLUSION AND CLINICAL IMPLICATIONS Although lasers do have legitimate uses in dentistry, they do not take the place of any of the more conventional tools in the dentist's armamentarium. Before investing in a laser, dentists should fully understand the differences between the various types, including what the scientific literature says about their applications.
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Affiliation(s)
- Douglas N Dederich
- Department of Periodontics, Louisiana State University School of Dentistry, New Orleans 70119-2799, USA.
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Rupprecht S, Tangermann K, Kessler P, Neukam FW, Wiltfang J. Er:YAG laser osteotomy directed by sensor controlled systems. J Craniomaxillofac Surg 2003; 31:337-42. [PMID: 14637061 DOI: 10.1016/j.jcms.2003.07.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
BACKGROUND Great efforts have been taken in the past to develop laser systems suitable for bone cutting. Laser systems emitting light in the infrared spectrum (2.9, 3.0 microm) have been found to be ideal for efficient bone ablation with very little carbonization. AIM To evaluate a new laser bone cutting system enabling the automatic detection of different tissue qualities by an integrated sensor to avoid damage to sensitive structures such as blood vessels or nerves. MATERIAL An Erbium:YAG laser containing an integrated closed-loop control system, was constructed and tested on dissected bone. Process emissions such as resonance changes caused by the interaction of laser light and various tissue structures can be used for a controlled system. Sensor signals from a photodiode and a piezo-electric accelerometer were received and processed to guide the laser osteotomy. METHODS Tests were performed on dissected bone specimens from rabbit femur (14) and minipig jaw (6). After laser application, the bone specimens were evaluated macroscopically and histologically. RESULTS The specimens were evaluated histomorphometrically for the depth of cortical bone ablation when the closed-loop control system switched off the laser. Mean courses of 97.45% (pig) and 97.83% (rabbit) showed that the systems work with precision. CONCLUSION After penetrating the cortical bone layer, the laser beam was promptly interrupted due to extreme changes of the signal character received by the sensor system. The in vitro tests of this new laser closed-loop control system were successful.
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Affiliation(s)
- Stephan Rupprecht
- Department of Oral and Cranio-Maxillofacial Surgery, Erlangen-Nuremberg University, Erlangen-Nuremberg, Germany.
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Kinoshita JI, Kimura Y, Matsumoto K. Comparative Study of Carious Dentin Removal by Er,Cr:YSGG Laser and Carisolv. ACTA ACUST UNITED AC 2003; 21:307-15. [PMID: 14651800 DOI: 10.1089/104454703322564532] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The present study aimed to compare carious dentin removal by air turbine, Carisolv and erbium,chromium:yttrium,scandium,gallium,garnet (Er,Cr:YSGG) laser, and examine morphological changes before and after these caries removal techniques under light microscopy and scanning electron microscopy (SEM). BACKGROUND DATA Although there have been numerous studies on removing caries by Er,Cr:YSGG laser, none has compared Er,Cr:YSGG laser and Carisolv, or reported on the usage of DIAGNOdent as a diagnostic tool particularly for advanced caries in in vitro experiments. MATERIALS AND METHODS Sixty extracted human teeth diagnosed as advanced caries were divided into three groups based on the treatment received, namely air turbine, Carisolv, and Er,Cr:YSGG laser groups. Each group was sub-divided into two in order to examine the results with or without finishing using nylon brush, 15% ethylene diamine tetraacetic acid (EDTA) or low-power laser, respectively. After evaluation by DIAGNOdent, specimens were observed under light microscopy or SEM. RESULTS Light microscopic observations varied considerably in the three treatment groups. SEM revealed that the surfaces treated by air turbine were very smooth, but with substantial debris. The Carisolv group exhibited a very rough surface with a thick smear layer, while the Er,Cr:YSGG group demonstrated smooth undulations with little smear layer and debris. Among the finishing techniques, the laser group demonstrated the best efficiency. DIAGNOdent scores supported the results of light microscopy. CONCLUSION These results suggest that caries removal by Er,Cr:YSGG laser is very effective even without finishing and DIAGNOdent is useful for diagnosing advanced caries in in vitro experiments.
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Sasaki KM, Aoki A, Ichinose S, Ishikawa I. Ultrastructural analysis of bone tissue irradiated by Er:YAG Laser. Lasers Surg Med 2003; 31:322-32. [PMID: 12430149 DOI: 10.1002/lsm.10110] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND OBJECTIVES The use of erbium:yttrium aluminum garnet (Er:YAG) laser has been suggested for bone ablation, however, little is known about the nature of the tissue after irradiation. This study was aimed to analyze the ultrastructure of bone tissue treated with Er:YAG laser, as compared to those treated with CO(2) laser and bur drilling. STUDY DESIGN/MATERIALS AND METHODS Parietal bones of Wistar rats were treated and analyzed by light microscopy, transmission electron microscopy (TEM), electron diffraction analysis and energy dispersive X-ray spectroscopy (SEM-EDX). RESULTS This study demonstrated that Er:YAG laser irradiation resulted in a very thin changed layer of approximately 30 microm thickness, which consisted of two distinct sub-layers: a superficial, greatly altered layer and a deep, less affected layer. CONCLUSIONS The major changes found on bone surface after Er:YAG laser irradiation consisted of micro-cracking, disorganization, and slight recrystallization of the original apatites and reduction of surrounding organic matrix.
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Affiliation(s)
- Katia M Sasaki
- Periodontology, Department of Hard Tissue Engineering, Graduate School, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8549, Japan.
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