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Samir ER, Hasnae R, Oumkeltoum E. Diode laser surgery for the treatment of denture-induced fibrous hyperplasia: a case report. Pan Afr Med J 2024; 47:105. [PMID: 38766568 PMCID: PMC11101355 DOI: 10.11604/pamj.2024.47.105.26619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 10/02/2021] [Indexed: 05/22/2024] Open
Abstract
Denture-induced fibrous hyperplasia (DIFH) is a persistent lesion caused by low-intensity chronic injury of the tissue in contact with an ill-fitting, over-extended denture. This fibrous connective tissue lesion commonly occurs in oral mucosa in patients showing important alveolar ridge atrophy. Surgical excision is the treatment of choice for DIFH. This article describes a successful laser surgery to remove a DIFH on a lower alveolar ridge of a patient wearing an ill-fitting completely removable denture. The use of a diode laser may result in less surgical time, less bleeding during surgery, more vestibular depth, better re-epithelialization of the wound, and no need for suturing.
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Affiliation(s)
- Er-Raji Samir
- Department of Periodontology, Faculty of Dentistry of Rabat, University Mohamed V, Rabat, Morocco
| | - Rokhssi Hasnae
- Department of Periodontology, Faculty of Dentistry of Rabat, University Mohamed V, Rabat, Morocco
| | - Ennibi Oumkeltoum
- Department of Periodontology, Faculty of Dentistry of Rabat, University Mohamed V, Rabat, Morocco
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Radhika B, Shivaswamy SW, Walvekar A, Dhingra K, Pattanshetty RS, Shashidara R. Comparative evaluation of thermal impact of 980nm diode laser on soft tissue using irrigation and non-irrigation systems: A histomorphometric study. J Indian Soc Periodontol 2024; 28:91-98. [PMID: 38988963 PMCID: PMC11232811 DOI: 10.4103/jisp.jisp_218_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 04/09/2024] [Accepted: 04/10/2024] [Indexed: 07/12/2024] Open
Abstract
Background Diode laser is one of the most captivating technologies in dental practice. In periodontics, when used at appropriate settings, it possesses the best properties for selective surgical and nonsurgical procedures such as subgingival calculus removal without a thermal change of the root surface, and also provides tissue surface sterilization. However, lasers always produce a certain amount of thermal damage to the soft tissues. Therefore, this study aimed to comparatively evaluate the thermal impact of 980-nm diode laser incisions, when used with irrigation versus nonirrigation systems. Materials and Methods The study was conducted on 24 gingival tissue samples obtained from the goat's mandible and maxilla. The samples were divided into two groups of 12 samples each, and laser incisions were given in 4 power settings, using 980-nm diode laser in super short pulse mode, with and without saline irrigation. Martius Scarlet Blue staining technique was used to prepare the histological slides. Then, slides were examined under a research microscope (Olympus CX 21), and the pictures of the slides were taken by mounting the camera onto the microscope mobile mount. The microscopic images hence obtained were analyzed for the depth and width of the incisions, area of carbonization, necrosis, and reversible damage, using the Digimizer image analysis software. Results The results of this study demonstrated that the mean incision depth was higher (592.49 ± 180.97, P < 0.05), with less carbonization (25.52 ± 29.21, P = 0.00) and less necrosis (311.63 ± 156.441, P < 0.05) in the laser incisions with irrigation, as compared to the laser incisions given without irrigation system. Conclusion Within the limitations of this study, it can be concluded that using an irrigation system causes less collateral damage while maintaining the incising efficiency of the diode laser. Further studies with a higher sample size, controlled irrigation systems, and incision techniques are needed to evaluate the efficiency of diode lasers for the clinical explanation of the results.
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Affiliation(s)
- Bharmappa Radhika
- Department of Periodontics and Implantology, Coorg Institute of Dental Sciences, Virajpet, Karnataka, India
| | - Sharath Wodeyar Shivaswamy
- Department of Periodontics and Implantology, Coorg Institute of Dental Sciences, Virajpet, Karnataka, India
| | - Amit Walvekar
- Department of Periodontics and Implantology, Coorg Institute of Dental Sciences, Virajpet, Karnataka, India
| | - Kunaal Dhingra
- Department of Periodontics, All India Institute of Medical Sciences, New Delhi, India
| | | | - Raju Shashidara
- Department of Oral Pathology and Microbiology, Coorg Institute of Dental Sciences, Virajpet, Karnataka, India
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Flórez PB, Maz HHA, Domínguez JA, Tost AJE, Páez JO. Histologic Evaluation of Effect of Three Wavelengths of Diode Laser on Human Gingival Margins. J Lasers Med Sci 2023; 14:e61. [PMID: 38318215 PMCID: PMC10843235 DOI: 10.34172/jlms.2023.61] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/20/2023] [Indexed: 02/07/2024]
Abstract
Introduction: Available evidence suggests that the response of the intervened tissue is directly linked to the effects generated by the cutting instrument used. To determine the histological findings in gingival tissue margins excised through gingivectomies performed using 450 nm, 940 nm, and 980 nm diode lasers. The present study aimed to determine the histological findings in gingival tissue margins excised through gingivectomies performed using 450 nm, 940 nm, and 980 nm diode lasers. Methods: Gingival tissue samples were collected from 30 patients who had undergone gingivectomy procedures. Each study group comprised 10 patients who willingly provided their samples after providing informed consent. The visualization of histological findings was facilitated through Hematoxylin-Eosin staining. Additionally, variables related to pain and hemostasis were assessed during the intraoperative period. Results: The incision quality was categorized as irregular across all three wavelengths. Histological examination of the epithelial tissue revealed the absence of carbonization and the preservation of cell morphology in over 50% of the resection margin in samples obtained with the 450 nm and 940 nm wavelengths. In the connective tissue, observations included carbonization, collagen coagulation, and basophilia, with the 980 nm wavelength demonstrating the highest percentage of samples displaying collagen coagulation in more than 50% of the resection margin. Conversely, the 450 nm wavelength exhibited the highest degree of preservation of the fibroblast structure. Conclusion: Based on a comprehensive analysis of the study results, it can be inferred that the 450nm and 940nm wavelength lasers tend to produce less thermal damage and better cell preservation when compared to the 980nm wavelength.
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Lopes-Santos G, Peralta-Mamani M, Oliveira DT. Histological implications of high-power laser use in the oral soft tissue lesions: a systematic review. Lasers Med Sci 2023; 38:263. [PMID: 37952038 DOI: 10.1007/s10103-023-03923-x] [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] [Received: 07/30/2023] [Accepted: 10/26/2023] [Indexed: 11/14/2023]
Abstract
The objective of this study was to describe the histological artifacts caused by high-power laser use compared to cold scalpel surgery in oral soft tissue lesions. Clinical studies that evaluated and compared histological artifacts resulting from the use of high-power lasers and cold scalpels in oral soft tissue lesions biopsies were retrieved from seven databases and four grey literatures, up to July 2022. The risk of bias was investigated using the ROBINS-I tool. The certainty of the evidence was assessed using the Grading of Recommendations, Assessment, Development, and Evaluation approach. Seven studies were eligible for qualitative analysis. Based on the results obtained, those four studies had a low risk of bias, and three studies had an unclear risk of bias. The certainty of the evidence was classified as low. Limited evidence showed that epithelial artifacts such as loss of intraepithelial and subepithelial adhesions, accompanied by pyknotic, fusiform, and/or hyperchromic nuclei, were more common when a high-power laser device was used. Four articles reported that the use of high-power lasers did not interfere with the histopathological diagnosis of oral soft tissue lesions. Due to the heterogeneity of the data, a meta-analysis was not performed. Compared to the use of cold scalpels, histological artifacts, particularly those observed in epithelial tissue, are more common when high-powered lasers are used in oral lesions biopsies. The eligibility criteria and adequate indications of high-power lasers in different oral soft tissue lesion treatments must be respected to avoid tissue artifacts that impair precise histopathological diagnosis.
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Affiliation(s)
- Gabriela Lopes-Santos
- Department of Surgery, Stomatology, Pathology and Radiology, Area of Pathology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Mariela Peralta-Mamani
- Department of Surgery, Stomatology, Pathology and Radiology, Area of Pathology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
- Faculdade do Centro Oeste Paulista - FACOP, Piratininga, São Paulo, Brazil
| | - Denise Tostes Oliveira
- Department of Surgery, Stomatology, Pathology and Radiology, Area of Pathology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil.
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Asnaashari M, Behnam Roudsari M, Shirmardi MS. Evaluation of the Effectiveness of the Carbon Dioxide (CO2) Laser in Minor Oral Surgery: A Systematic Review. J Lasers Med Sci 2023; 14:e44. [PMID: 38028885 PMCID: PMC10658117 DOI: 10.34172/jlms.2023.44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 08/15/2023] [Indexed: 12/01/2023]
Abstract
Introduction: Lasers in oral surgery have been extensively studied in recent years. Laser treatment is now a well-known technology that is frequently employed on oral soft tissues. The carbon dioxide (CO2) laser was one of the first soft tissue removal lasers. Because of the strong affinity of the CO2 laser to water, it is best used for removing, vaporizing, and coagulating these tissues. In minor oral surgery, CO2 laser therapy has shown advantages. Therefore, this study examined the CO2 laser use in minor oral soft tissue surgery. Methods: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) standards were followed in this study. A question for research encompassing the inclusion criteria for the participants, intervention, comparison, outcome, and study design (PICOS) was formulated. The search queries were entered into the PubMed/Medline, Scopus, and Embase databases. Consideration was given to publications published between January 1, 2018 and March 15, 2023. Results: The research included 37 studies after narrowing search results, eliminating duplicate titles, and conducting an eligibility review (three animal studies, seven case reports, three case series, and twenty-four clinical studies). CO2 lasers alone or in combination with other therapies successfully treated oral potentially malignant disorders (OPMDs), oral tumors, oral fibrous-epithelial lesions, gingival melanin hyperpigmentation, pyogenic granuloma, socket preservation, mucocele, high labial frenulum attachment, and so on. CO2 lasers reduced intra- and postoperative complications and adverse effects, improved postoperative functional results, ablated tissues with precision, and minimized disease recurrence and malignant transformation. Conclusion: Our study found that the CO2 laser in oral minor surgeries is successful, but further randomized clinical trials and multicenter studies are recommended to compare CO2 laser surgery to other treatments.
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Affiliation(s)
- Mohammad Asnaashari
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Behnam Roudsari
- Dental Research Center, Research Institute of Dental Sciences, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Sadat Shirmardi
- Dental Research Center, Research Institute of Dental Sciences, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Lopes-Santos G, da Silva Santos PS, Oliveira DT. Cytological Artifacts Mimicking Vulgar Pemphigus Caused by Diode Laser Surgery in Oral Lesion. Int J Surg Pathol 2023; 31:1323-1325. [PMID: 36514289 DOI: 10.1177/10668969221143482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Gabriela Lopes-Santos
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Paulo Sérgio da Silva Santos
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Denise Tostes Oliveira
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
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Ou M, Huang X. Histological evaluation of mouse tongue incisions after Er:YAG laser surgery with different pulse energies versus after conventional scalpel surgery. Lasers Med Sci 2023; 38:181. [PMID: 37568046 DOI: 10.1007/s10103-023-03852-9] [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] [Received: 02/25/2023] [Accepted: 08/07/2023] [Indexed: 08/13/2023]
Abstract
PURPOSE To identify the surgical instrument that allows for optimal healing of tongue incisions. METHODS An Er:YAG laser was compared with different pulse energies to a conventional scalpel for the incision of mouse tongue tissues. Mice were sacrificed through cervical dislocation at 24, 48, and 72 h postoperatively, followed by extraction of their tongues for incision experiments. The healing of the incisions and expression of inflammation- and pain-related factors in the tongues were compared between the surgical procedure groups. RESULTS In laser-treated mice, tongue incisions healed the fastest when the laser output energy was 60 MJ per pulse. Macrophage chemotaxis toward the incisional area was triggered on the first postoperative day for the 60-MJ group, while the time for macrophage chemotaxis to the surgical area was later in the 80-MJ group. Tumor necrosis factor-alpha expression increased and then decreased in the 80-MJ group; however, it gradually decreased in the 60-MJ and conventional scalpel groups. Prostaglandin E2 expression increased and then decreased in the 80-MJ and conventional scalpel groups but gradually decreased in the 60-MJ group. The expression of transforming growth factor beta 1 gradually decreased in the 60-MJ and 80-MJ groups but gradually increased in the conventional scalpel group. CONCLUSION Compared with surgical procedures using conventional scalpels, those using an Er:YAG laser with appropriate pulse energies can inhibit inflammation in the incisional area and promote incision healing. The use of an Er:YAG laser with appropriate pulse energies can alleviate intraoperative and postoperative pain in the incisional area.
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Affiliation(s)
- Mingming Ou
- Department of Stomatology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong'an Road, Xicheng District, Beijing, 100050, China
| | - Xiaofeng Huang
- Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, No. 95 Yong'an Road, Xicheng District, Beijing, 100050, China.
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Tănase MI, Bulmaci M, Stan C, Doinel RG, Cosgarea M, Pop SS, Maniu AA. Laser nasal surgery (Review). Exp Ther Med 2023; 25:108. [PMID: 36778045 PMCID: PMC9909775 DOI: 10.3892/etm.2023.11807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 01/05/2023] [Indexed: 01/26/2023] Open
Abstract
Laser nasal surgery has been an elusive subject in the last 10 to 15 years It was considered as a potential surgical staple for nasal surgery in the 1980s; however, it did not become one due to technical difficulties. Laser therapy has reemerged as an alternative to classical endoscopic surgery, and otorhinolaryngology surgeons are considering the benefits that it can offer. The advantages of this procedure are shorter hospitalization time, lack of nasal packing, high procedural precision with tissue sparing, and the unique capability of reducing both bacterial and fungal colonization at the level of the paranasal sinus. Therefore, laser therapy appears to be an invaluable tool for clinical practice. Due to the absence of a guaranteed cure for reoccurring nasal polyposis, laser therapy is worth investigating. For this therapy to evolve, an improved understanding of laser types and the effects that they produce is required. By investing in further developments of the equipment, the technique may become more widely used. With the current accelerated rate of technological evolution and robotic capabilities, laser nasal surgery may become a gold standard in future years. The aim of the present review is to evaluate whether it is worth investing in nasal laser surgery as a future alternative to current treatment standards.
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Affiliation(s)
- Mihai Ionuț Tănase
- Department of Otorhinolaryngology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Mara Bulmaci
- Department of Otorhinolaryngology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Constantin Stan
- Department of Otorhinolaryngology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania,Department of Clinical Surgery, Dunărea de Jos University, Faculty of Medicine and Pharmacy, 800008 Galați, Romania
| | - Rădeanu Gheorghe Doinel
- Department of Otorhinolaryngology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania,Correspondence to: Dr Rădeanu Gheorghe Doinel, Department of Otorhinolaryngology, Iuliu Haţieganu University of Medicine and Pharmacy, 8 Victor Babes Street, 400012 Cluj-Napoca, Romania
| | - Marcel Cosgarea
- Department of Otorhinolaryngology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Septimiu Sever Pop
- Department of Otorhinolaryngology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
| | - Alma Aurelia Maniu
- Department of Otorhinolaryngology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania
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Prado MCO, Nwizu NN, Patel SA, Streckfus CF, Zezell DM, Barros J. Thermal damage and excision time of micro and super pulsed diode lasers: A comparative ex vivo analysis. Clin Exp Dent Res 2022; 8:1655-1663. [PMID: 36218194 PMCID: PMC9760131 DOI: 10.1002/cre2.670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 06/21/2022] [Accepted: 06/24/2022] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVES The primary aim of this ex vivo study was to evaluate thermal damage and cutting efficiency of micro and super pulsed diode lasers. The secondary aim was to suggest a guideline to perform simple surgical excisions adequate for histopathological evaluation. MATERIAL AND METHODS Ten groups of 10 specimens of pig tongues were excised using a blade (G1), a micro pulsed (G2-G9), and a super pulsed diode (G10) lasers. Different output power, pulse duration, pulse interval, and duty cycle were tested. Quantitative measures of thermal damage and excision times were recorded. Statistical analysis was performed at a significance level of 5%. RESULTS The control group (G1) presented no thermal damage. Within the laser groups (G2-G10), no statistically significant differences in depth of thermal damage (µm) were noted. G3 showed significantly less area of thermal damage (mm2 ) when compared with G7 and G9 (p < .05). The median excision time of the control group and super pulsed diode laser group were significantly lower (p < .001) than the micro pulsed diode laser groups. CONCLUSIONS The cutting efficiency of the super pulsed diode laser is comparable to traditional blade, and with appropriate parameters, these lasers can produce predictable surgical outcomes with less collateral damage.
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Affiliation(s)
- Mariliza C. O. Prado
- Laboratory of Biophotonics, Center for Lasers and ApplicationsIPEN‐CNEN/SPSão PauloSão PauloBrazil
| | - Ngozi N. Nwizu
- Department of Diagnostic and Biomedical Sciences, University of Texas Health Science Center at HoustonSchool of DentistryHoustonTexasUSA
| | - Shalizeh A. Patel
- Department of Restorative Dentistry & Prosthodontics, University of Texas Health Science Center at HoustonSchool of DentistryHoustonTexasUSA
| | - Charles F. Streckfus
- Department of Diagnostic and Biomedical Sciences, University of Texas Health Science Center at HoustonSchool of DentistryHoustonTexasUSA
| | - Denise Maria Zezell
- Laboratory of Biophotonics, Center for Lasers and ApplicationsIPEN‐CNEN/SPSão PauloSão PauloBrazil
| | - Juliana Barros
- Department of Restorative Dentistry & Prosthodontics, University of Texas Health Science Center at HoustonSchool of DentistryHoustonTexasUSA
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Yolcu D, Hondur AM, Akyürek N, Bilgihan K. Histologic and Immunohistochemical Evaluation of Radiosurgery in Strabismus Surgery in a Rabbit Model. Curr Eye Res 2022; 47:1413-1418. [PMID: 35748851 DOI: 10.1080/02713683.2022.2094417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
PURPOSE The aim of this study was to evaluate the use of monopolar radiosurgery (MRS) assisted strabismus surgery and to compare its histologic and immunohistochemical wound healing outcomes with conventional surgery. MATERIALS AND METHODS Superior rectus muscle resection was performed on 30 white rabbits with three different surgical muscle cutting techniques: monopolar radiosurgery (MRS group), conventional scissors preceded by bipolar electrocautery (BEC group), and conventional scissors with no cauterization (control group). Degree of tissue injury, bleeding, inflammation, and fibrosis, as well as wound healing rate (CD68+ cell number), were evaluated. RESULTS In CS group, hemorrhage scores were significantly higher than those in the other groups (MRS group: Z = 5.182; p < 0.001 and BEC group: Z = 4.463; p < 0.001) and MRS group had lower scores than BEC group; however, the difference was not significant (Z = 1.423; p = 0.211). The tissue injury score in BEC group was higher when compared with MRS, and the difference was statistically significant (p = 0.028). Median inflammation scores at days 1 and 21 were lowest in MRS group, but the difference was not statistically significant among groups (day 1; p = 0.115, day 21; p = 0.095). The median fibrosis score was higher in the control group, when compared with MRS, and the difference was statistically significant (muscle-sclera; p = 0.011 and muscle-conjunctiva: p = 0.003). The macrophage score (number of CD68+ cells) was lowest in CS group; however, the difference was not significant (p = 0.657). CONCLUSIONS Monopolar radiosurgery is a novel method for strabismus surgery and provides equivalent hemostasis effects and wound healing properties, compared with conventional methods, and enhances surgeon comfort, as muscle incisions are made in one step with clean surgical area.
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Affiliation(s)
- Demet Yolcu
- Department of Ophthalmology, University of Health Sciences, Abdurrahman Yurtaslan Oncology Training and Research Hospital, Ankara, Turkey
| | - Ahmet Murad Hondur
- Department of Ophthalmology, Gazi University Medical School, Ankara, Turkey
| | - Nalan Akyürek
- Department of Pathology, Gazi University Medical School, Ankara, Turkey
| | - Kamil Bilgihan
- Department of Ophthalmology, Gazi University Medical School, Ankara, Turkey
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Ulmschneider C, Baker J, Vize I, Jiang J. Phonosurgery: A review of current methodologies. World J Otorhinolaryngol Head Neck Surg 2021; 7:344-353. [PMID: 34632350 PMCID: PMC8486699 DOI: 10.1016/j.wjorl.2020.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 08/31/2020] [Accepted: 09/13/2020] [Indexed: 01/11/2023] Open
Abstract
Cold-steel has served as the gold standard modality of phonosurgery for most of its history. Surgical laser technology has revolutionized this field with its wide use of applications. Additional modalities have also been introduced such as coagulative lasers, photodynamic therapy, and cryotherapy. This review will compare the surgical modalities of cold steel, surgical lasers, phototherapy and cryotherapy. The mechanism of action, tissue effects and typical uses will be addressed for each modality.
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Affiliation(s)
| | - Jeffrey Baker
- University of Wisconsin Madison School of Medicine and Public Health, United States
| | - Ian Vize
- University of Wisconsin Madison School of Medicine and Public Health, United States
| | - Jack Jiang
- University of Wisconsin Madison School of Medicine and Public Health, United States
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Li X, He M, He H. Treatment of Wound Healing with Sequential Therapy to Accelerate Recovery and Inhibit Scar Hyperplasia: A Case Report. Clin Cosmet Investig Dermatol 2021; 14:821-825. [PMID: 34262319 PMCID: PMC8275119 DOI: 10.2147/ccid.s319558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 06/25/2021] [Indexed: 02/05/2023]
Abstract
Study Design/Patients and Methods A 19-year-old male was reported to have a postoperative facial trauma suture as a result of being involved in a car accident. Red light-emitting diode (LED) therapy (20 min, 96 J/cm2, 633 nm), Botulinum Toxin Type A 36 IU injection, BroadBand Light and Er:YAG laser at various stages of wound healing were applied as the sequential therapy. Results Since the correction was promptly apparent and acceptable, the treatment proved secure and efficacious for repairing wound healing. Conclusion Clinically sequential therapy has demonstrated marked improvement in our case. Scar sequential therapy may offer a new strategy for wound healing recovery.
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Affiliation(s)
- Xiaoqing Li
- Department of Medical Cosmetology, Chengdu Second People's Hospital, Chengdu, 610011, People's Republic of China
| | - Mei He
- Department of Medical Cosmetology, Chengdu Second People's Hospital, Chengdu, 610011, People's Republic of China
| | - Hailun He
- Cosmetics Safety and Efficacy Evaluation Centre, Sichuan University West China Hospital, Chengdu, 610041, People's Republic of China.,Sichuan Engineering Technology Research Centre of Cosmetic, Chengdu, 610041, People's Republic of China.,Department of Dermatology, Sichuan University West China Hospital, Chengdu, 610041, People's Republic of China
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Impellizzeri A, Horodynski M, Serritella E, Palaia G, De Stefano A, Polimeni A, Galluccio G. Uncovering and Autonomous Eruption of Palatally Impacted Canines-A Case Report. Dent J (Basel) 2021; 9:dj9060066. [PMID: 34207531 PMCID: PMC8229895 DOI: 10.3390/dj9060066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 05/31/2021] [Accepted: 06/07/2021] [Indexed: 11/16/2022] Open
Abstract
The impaction of permanent maxillary canine is a common clinical occurrence, and it is observed in 2% of patients who require orthodontic treatment. This case report describes a new orthodontic-surgical approach through the use of CO2 laser, for the exposure of the palatally impacted canines. A 13-year-old female referred to our observation to make an orthodontic examination because of the maxillary primary canines’ persistence in upper arch. Orthopanoramic X-ray showed impaction of both permanent maxillary canines. The family history revealed that the patient’s mother had the same orthodontic problem. Cone Beam Computer Tomography (CBCT) was requested to plan the surgical-orthodontic treatment. Surgical exposure of the impacted canines was performed using a CO2 laser and subsequent periodontal pack application. No orthodontic devices were applied for impacted teeth traction on dental arch. Canines’ movement was monitored at 1, 8 and 16 weeks post-surgery with photo and intraoral scanner CS3500 (CS3500®, Carestream Health, Atlanta, GA, USA). When canine crowns were completely erupted on palatal side, the alignment in the arch with indirect bonding technique was performed. Complete disimpaction of canine crowns was obtained in only four months. As reported in the literature, this case confirms that impacted canines’ exposure to CO2 laser has advantages if compared with traditional surgery: no bleeding during and after the procedure, decontaminant effect on the surgical area, no suture, and a fast spontaneous eruption. Conclusions: The pre-orthodontic uncovering and autonomous eruption of palatally impacted maxillary canines provides simplified, predictable, and more aesthetic outcomes. Furthermore, a significant positive factor is that there is no need to carry out the orthodontic traction of the impacted element, undoubtedly better compliance by the patient during the next alignment phase with the fix orthodontic appliance.
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Palaia G, Renzi F, Pergolini D, Del Vecchio A, Visca P, Tenore G, Romeo U. Histological Ex Vivo Evaluation of the Suitability of a 976 nm Diode Laser in Oral Soft Tissue Biopsies. Int J Dent 2021; 2021:6658268. [PMID: 34007279 PMCID: PMC8100417 DOI: 10.1155/2021/6658268] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 03/24/2021] [Accepted: 04/19/2021] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Laser-induced thermal effects can preclude a safe histological evaluation of biopsy resection margins. The aim of this study was to evaluate the suitability of a 976 nm diode laser in oral soft tissue biopsies in an ex vivo study. MATERIALS AND METHODS A 976 nm diode laser (Solase®, Lazon Medical Laser, China) has been used in the contact mode, using a 400 μm fiber tip, at different parameters from 4 to 6 W in the continuous wave (CW), with a fluence between 3184 and 4777 J/cm2, and pulsed wave (PW) mode, with a fluence between 318,4 and 477,7 J/cm2, to obtain 30 samples from fresh pig cadaver tongues. All specimens were subdivided into 6 groups (from A to F), and each group consisted of 5 samples. Two sections were obtained from each sample. A histological analysis was performed using an optical microscope at magnifications of 5x and 10x. Statistical analysis was carried out using Kruskal-Wallis and Dunn's tests. RESULTS The results showed that histological readability was optimal in all the samples. The thermal damage was negligible in all groups. The average thermal damage was 208.40 ± 133.81 μm in the epithelial tissue and 330.14 ± 147.45 μm in the connective tissue. The statistical analysis showed no differences between the groups (p > 0.05). CONCLUSION A 976 nm diode laser demonstrated good surgical effectiveness that provoked little peripheral damage in the cut edges and allowed a safe histological diagnosis. Clinical Relevance. In oral pathology, many times, there is fear in using the laser to remove some lesions due to its thermal effect on the tissues close to the lesion. This effect is always present in the use of the laser, but the intent is to minimize this effect to have as little alteration as possible on the surrounding tissues.
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Affiliation(s)
- Gaspare Palaia
- “Sapienza” University of Rome, Department of Oral and Maxillofacial Sciences, Via Caserta 6, Rome 00161, Italy
| | - Federico Renzi
- “Sapienza” University of Rome, Department of Oral and Maxillofacial Sciences, Via Caserta 6, Rome 00161, Italy
| | - Daniele Pergolini
- “Sapienza” University of Rome, Department of Oral and Maxillofacial Sciences, Via Caserta 6, Rome 00161, Italy
| | - Alessandro Del Vecchio
- “Sapienza” University of Rome, Department of Oral and Maxillofacial Sciences, Via Caserta 6, Rome 00161, Italy
| | - Paolo Visca
- Department of Cytology and Cellular Diagnostics, Regina Elena Institute, Via Elio Chianesi 53, Rome 00144, Italy
| | - Gianluca Tenore
- “Sapienza” University of Rome, Department of Oral and Maxillofacial Sciences, Via Caserta 6, Rome 00161, Italy
| | - Umberto Romeo
- “Sapienza” University of Rome, Department of Oral and Maxillofacial Sciences, Via Caserta 6, Rome 00161, Italy
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Alshammari FD, Alharbi SA, Bealy MAB, Idris KAEAE, Alqahtani AA, Ahmed HG. Clinicopathological Features of Patients Nominated for Head and Neck Biopsies: A One-Year Series. Cureus 2021; 13:e13666. [PMID: 33824817 PMCID: PMC8017897 DOI: 10.7759/cureus.13666] [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] [Indexed: 11/05/2022] Open
Abstract
Background Head and neck lesions, which are predominantly benign, were widely reported. Some of these tumors are potentially neoplastic and others are non-neoplastic. Therefore, this study aimed to assess the clinicopathological features of patients nominated for head and neck biopsies. Methodology In this study, data regarding head and neck biopsies were retrieved from the Department of Pathology at King Khalid Hospital, Hai'l, Northern Saudi Arabia. Data referring to head and neck biopsies of patients who were diagnosed during the period from January 2018 to December 2018 were included. Results The initial clinical presentations were stated for 50/64 (78.1%) head and neck lesions, 12/64 (18.8%) head and neck cysts, 1/64 (1.6%) keloid, and 1/64 (1.6%) ischemia. With regard to the biopsy's site, most were taken from the nose followed by oral cavity, scalp, ear, face, and eye, constituting 19/64 (29.7%), 15/64 (23.4%), 9/64 (14.1%), 5/65 (7.8%), 4/64 (6.2%), and 3/64 (4.7%), respectively. Conclusion Head and neck benign lesions, predominantly inflammatory lesions, are common in Northern Saudi Arabia. Accurate identification of these lesions is important during histopathological diagnosis, as some have pathological features that mimic some potentially neoplastic lesions.
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Affiliation(s)
- Fawaz D Alshammari
- Department of Clinical Laboratory, College of Applied Medical Science, University of Hail, Hail, SAU
| | - Samir Abdulkarim Alharbi
- Department of Clinical Laboratory, College of Applied Medical Science, Shaqra University, Shaqra, SAU
| | | | | | | | - Hussain G Ahmed
- Department of Histopathology and Cytology, Faculty of Medical Laboratory Sciences, University of Khartoum, Khartoum, SDN.,Department of Pathology, University of Hail, Hail, SAU
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Lin Z, Strauss FJ, Lang NP, Sculean A, Salvi GE, Stähli A. Efficacy of laser monotherapy or non-surgical mechanical instrumentation in the management of untreated periodontitis patients. A systematic review and meta-analysis. Clin Oral Investig 2021; 25:375-391. [PMID: 33170372 PMCID: PMC7819921 DOI: 10.1007/s00784-020-03584-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 09/11/2020] [Indexed: 01/16/2023]
Abstract
OBJECTIVE To evaluate and compare the effects of laser monotherapy with non-surgical mechanical instrumentation alone in untreated periodontitis patients. MATERIALS AND METHODS A focused question was formulated based on the Population, Intervention, Comparison, Outcome, and Study design criteria (PICOS): in patients with untreated periodontitis, does laser mono-therapy provide adjunctive effects on pocket probing depth (PPD) changes compared with non-surgical instrumentation alone? Both randomized controlled clinical trials (RCTs) and controlled clinical trials (CCTs) were included. The results of the meta-analyses are expressed as weighted mean differences (WMD) and reported according to the PRISMA guidelines. RESULTS The search yielded 1268 records, out of which 8 articles could be included. With respect to PPD changes, a meta-analysis including 5 articles (n = 148) failed to identify statistically significant differences in favor of laser monotherapy for PPD change (WMD = 0.14 mm; 95% CI: - 0.04/0.32; z = 1.51; p = 0.132) nor for clinical attachment level (CAL) (WMD = 0.04 mm; 95% CI: - 0.35/0.42; z = 0.19; p = 0.850). Data on cost-effectiveness are lacking. One study reported patient-related outcome measures (PROMS). CONCLUSIONS In untreated periodontitis patients, laser monotherapy does not yield superior clinical benefits compared with non-surgical mechanical instrumentation alone. CLINICAL RELEVANCE In untreated periodontitis patients, mechanical instrumentation with hand and/or ultrasonic instruments remains the standard of care.
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Affiliation(s)
- Zhikai Lin
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
- Department of Periodontology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Franz J Strauss
- Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
- Department of Conservative Dentistry Faculty of Dentistry , University of Chile , Santiago, Chile
| | - Niklaus P Lang
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
| | - Anton Sculean
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
| | - Giovanni E Salvi
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
| | - Alexandra Stähli
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland.
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17
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Hanke A, Fimmers R, Frentzen M, Meister J. Quantitative determination of cut efficiency during soft tissue surgery using diode lasers in the wavelength range between 400 and 1500 nm. Lasers Med Sci 2021; 36:1633-1647. [PMID: 33496905 PMCID: PMC8433103 DOI: 10.1007/s10103-020-03243-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 12/29/2020] [Indexed: 01/19/2023]
Abstract
Within the scope of this ex vivo study, the cut efficiency was investigated with eight diode laser wavelengths in the range from 400 to 1500 nm. Incisions on porcine gingiva samples were generated in CW-mode at a power range of 0.5–4 W using a bare fiber (∅ = 320 μm) in contact and non-contact mode at a cut speed of 2 mm/s. Cut depths, cut widths, and thermal damages were recorded based on histological sections and were evaluated via measurement masks. Moreover, with respect to the controllability of a therapeutic measure, an efficiency factor was defined. At powers above 2 W, for 445 nm, the maximum cut depth was 820 μm and 344 μm for 810 nm, respectively. At all wavelength and power ranges, the cut width averaged 125 μm. At minimum output power (0.5 W), the spatial expansion of the thermal damage in the tissue surface layer corresponds in the blue/green wavelength range from the very beginning of the laser impact to the fiber core diameter. It could be shown that increases in the diode laser power output do not correlate to the same extent with the incision depth nor with thermal damage to tissue.
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Affiliation(s)
- Amelie Hanke
- Department of Operative and Preventive Dentistry, Bonn University, Welschnonnenstrasse 17, 53111, Bonn, Germany
| | - Rolf Fimmers
- Institute for Medical Biometry, Informatics and Epidemiology (IMBIE), Bonn University, Sigmund-Freud-Strasse 25, 53105, Bonn, Germany
| | - Matthias Frentzen
- Department of Operative and Preventive Dentistry, Bonn University, Welschnonnenstrasse 17, 53111, Bonn, Germany
- Center of Dento-Maxillo-Facial Medicine, Bonn University, Welschnonnenstrasse 17, 53111, Bonn, Germany
| | - Jörg Meister
- Center of Dento-Maxillo-Facial Medicine, Bonn University, Welschnonnenstrasse 17, 53111, Bonn, Germany.
- Center of Applied Medical Laser Research and Biomedical Optics (AMLaReBO), Bonn University, Welschnonnenstrasse 17, 53111, Bonn, Germany.
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Velenjak Street, 19857-17443, Tehran, Iran.
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Jurczyszyn K, Trzeciakowski W, Woźniak Z, Ziółkowski P, Trafalski M. Assessment of Effects of Laser Light Combining Three Wavelengths (450, 520 and 640 nm) on Temperature Increase and Depth of Tissue Lesions in an Ex Vivo Study. MATERIALS 2020; 13:ma13235340. [PMID: 33255836 PMCID: PMC7728334 DOI: 10.3390/ma13235340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 12/30/2022]
Abstract
Background: Lasers are widely used in medicine in soft and hard tissue surgeries and biostimulation. Studies found in literature typically compare the effects of single-wavelength lasers on tissues or cell cultures. In our study, we used a diode laser capable of emitting three components of visible light (640 nm, red; 520 nm, green; 450 nm, blue) and combining them in a single beam. The aim of the study was to assess the effects of laser radiation in the visible spectrum on tissue in vitro, depending on the wavelength and pulse width. Methods: All irradiations were performed using the same output power (1.5 W). We used various duty cycles: 10, 50, 80 and 100% with 100 Hz frequency. Maximum superficial temperature, rate of temperature increase and lesion depth were investigated. Results: Maximum superficial temperature was observed for 450 + 520 nm irradiation (100% duty cycle). The highest rate of increase of temperature was noted for 450 + 520 nm (100% duty cycle). Maximum lesion depth was observed in case of three-wavelength irradiation (450 + 520 + 640 nm) for 100, 80 and 50% duty cycles. Conclusions: The synergistic effect of two-wavelength (450 + 520 nm) irradiation was observed in case of maximum temperature measurement. The deepest depth of lesion was noted after three-wavelength irradiation (450 + 520 + 640 nm).
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Affiliation(s)
- Kamil Jurczyszyn
- Department of Dental Surgery, Wroclaw Medical University, 50-425 Wroclaw, Poland;
- Correspondence:
| | - Witold Trzeciakowski
- Institute of High Pressure Physics, Polish Academy of Sciences, 01-142 Warsaw, Poland;
| | - Zdzisław Woźniak
- Department of Pathology, Wroclaw Medical University, 50-368 Wroclaw, Poland; (Z.W.); (P.Z.)
| | - Piotr Ziółkowski
- Department of Pathology, Wroclaw Medical University, 50-368 Wroclaw, Poland; (Z.W.); (P.Z.)
| | - Mateusz Trafalski
- Department of Dental Surgery, Wroclaw Medical University, 50-425 Wroclaw, Poland;
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Viani MV, Corcione L, Di Blasio C, Bologna-Molina R, Vescovi P, Meleti M. A Single Case Report of Granular Cell Tumor of the Tongue Successfully Treated through 445 nm Diode Laser. Healthcare (Basel) 2020; 8:healthcare8030267. [PMID: 32823546 PMCID: PMC7551446 DOI: 10.3390/healthcare8030267] [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: 06/10/2020] [Revised: 07/21/2020] [Accepted: 08/11/2020] [Indexed: 02/07/2023] Open
Abstract
Oral granular cell tumor (GCT) is a relatively rare, benign lesion that can easily be misdiagnosed. Particularly, the presence of pseudoepitheliomatous hyperplasia might, in some cases, lead to the hypothesis of squamous cell carcinoma. Surgical excision is the treatment of choice. Recurrence has been reported in up to 15% of cases treated with conventional surgery. Here, we reported a case of GCT of the tongue in a young female patient, which was successfully treated through 445 nm diode laser excision. Laser surgery might reduce bleeding and postoperative pain and may be associated with more rapid healing. Particularly, the vaporization effect on remnant tissues could eliminate GCT cells on the surgical bed, thus hypothetically leading to a lower rate of recurrence. In the present case, complete healing occurred in 1 week, and no recurrence was observed after 6 months. Laser surgery also allows the possibility to obtain second intention healing. Possible laser-induced histopathological artifacts should be carefully considered.
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Affiliation(s)
- Maria Vittoria Viani
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy; (L.C.); (P.V.); (M.M.)
- Correspondence:
| | - Luigi Corcione
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy; (L.C.); (P.V.); (M.M.)
| | | | | | - Paolo Vescovi
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy; (L.C.); (P.V.); (M.M.)
| | - Marco Meleti
- Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy; (L.C.); (P.V.); (M.M.)
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Histological Effects of an Innovative 445 Nm Blue Laser During Oral Soft Tissue Biopsy. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17082651. [PMID: 32294912 PMCID: PMC7215754 DOI: 10.3390/ijerph17082651] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/08/2020] [Accepted: 04/09/2020] [Indexed: 12/26/2022]
Abstract
Continuously evolving laser devices can be used in various fields; they are an alternative to the traditional cold blade surgery to perform biopsies of oral soft tissues. The aspect focused on in this paper is the possibility to use the 445 nm diode laser (Eltech K-Laser srl, Treviso, Italy) in complete safety, by evaluating its thermal effects during microscopy. A histological evaluation of the alteration of the peri-incisional edges on 10 samples was realized. All excisional biopsies were related to clinically unsuspected lesions and performed by the same expert operator. The surgical procedure was performed with the same laser parameters and the same pathologist evaluated the thermal effect on the samples. An average value of the detected tissue alteration was calculated; the average damage of the epithelium was 650.93 μm, while in the connective tissue it was 468.07 μm. In all the cases a clear diagnosis was possible, and no clinical complications were observed; so, the 445 nm diode laser proved to be a device that can be safely used for biopsies of clinically unsuspicious lesions. Due to the small number of cases, this in vivo preliminary experience needs to be extended.
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Namour M, El Mobadder M, Magnin D, Peremans A, Verspecht T, Teughels W, Lamard L, Nammour S, Rompen E. Q-Switch Nd:YAG Laser-Assisted Decontamination of Implant Surface. Dent J (Basel) 2019; 7:dj7040099. [PMID: 31581536 PMCID: PMC6960958 DOI: 10.3390/dj7040099] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 09/19/2019] [Accepted: 09/24/2019] [Indexed: 01/04/2023] Open
Abstract
Peri-implantitis (PI) is an inflammatory disease of peri-implant tissues, it represents the most frequent complication of dental implants. Evidence revealed that microorganisms play the chief role in causing PI. The purpose of our study is to evaluate the cleaning of contaminated dental implant surfaces by means of the Q-switch Nd:YAG (Neodymium-doped Yttrium Aluminum Garnet) laser and an increase in temperature at lased implant surfaces during the cleaning process. Seventy-eight implants (titanium grade 4) were used (Euroteknika, Sallanches, France). Thirty-six sterile implants and forty-two contaminated implants were collected from failed clinical implants for different reasons, independent from the study. Thirty-six contaminated implants were partially irradiated by Q-switch Nd:YAG laser (1064 nm). Six other contaminated implants were used for temperature rise evaluation. All laser irradiations were calibrated by means of a powermetter in order to evaluate the effective delivered energy. The irradiation conditions delivered per pulse on the target were effectively: energy density per pulse of 0.597 J/cm2, pick powers density of 56 mW/cm2, 270 mW per pulse with a spot diameter of 2.4 mm, and with repetition rate of 10 Hz for pulse duration of 6 ns. Irradiation was performed during a total time of 2 s in a non-contact mode at a distance of 0.5 mm from implant surfaces. The parameters were chosen according to the results of a theoretical modeling calculation of the Nd:YAG laser fluency on implant surface. Evaluation of contaminants removal showed that the cleaning of the irradiated implant surfaces was statistically similar to those of sterile implants (p-value ≤ 0.05). SEM analysis confirmed that our parameters did not alter the lased surfaces. The increase in temperature generated at lased implant surfaces during cleaning was below 1 °C. According to our findings, Q-switch Nd:YAG laser with short pulse duration in nanoseconds is able to significantly clean contaminated implant surfaces. Irradiation parameters used in our study can be considered safe for periodontal tissue.
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Affiliation(s)
- Melanie Namour
- Department of Dental Science, Faculty of Medicine, University of Liege, 4000 Liege, Belgium.
| | - Marwan El Mobadder
- Department of Dental Science, Faculty of Medicine, University of Liege, 4000 Liege, Belgium.
| | - Delphine Magnin
- Bio- and Soft Matter Division, Institute of Condensed and Nanosciences, Université Catholique de Louvain (UCL), 1348-Louvain-la-Neuve, Belgium.
| | - André Peremans
- Laboratoire Physique de la Matière et du Rayonnement (P.M.R.), Université de Namur, 5000 Namur, Belgium.
| | - Tim Verspecht
- Department of Oral Health Sciences, University of Leuven (K.U. Leuven), 3000 Leuven, Belgium.
| | - Wim Teughels
- Department of Oral Health Sciences, University of Leuven (K.U. Leuven) and Dentistry, University Hospitals Leuven, 3000 Leuven, Belgium.
| | | | - Samir Nammour
- Department of Dental Science, Faculty of Medicine, University of Liege, 4000 Liege, Belgium.
| | - Eric Rompen
- Department of Dental Science, Faculty of Medicine, University of Liege, 4000 Liege, Belgium.
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