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Mojahedi Nasab SM, Frentzen M, Mayr A, Rahmani S, Anbari F, Meister J, Azari-Marhabi S, Mojahedi Nasab D. Comparison of the Diode Laser Wavelengths 445 nm and 810 nm in Gingival Depigmentation - A Clinical Evaluation. J Lasers Med Sci 2023; 14:e63. [PMID: 38318220 PMCID: PMC10843237 DOI: 10.34172/jlms.2023.63] [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: 09/01/2023] [Accepted: 10/24/2023] [Indexed: 02/07/2024]
Abstract
Introduction: Nowadays, esthetic appearance plays an important role in the field of dentistry. Discolorations and pigmentations of the gingiva reduce the appearance of a healthy-looking smile. On this occasion, the use of lasers shows a promising approach for a fast and non-aggressive treatment in this field. Different laser wavelengths are being used for gingival depigmentation this clinical study aimed to investigate the effect of the novel laser wavelength (445 nm) in this field and compare it with an 810 nm diode laser. Methods: Two diode laser wavelengths (445 nm and 810 nm) were used for depigmentation. The laser output power chosen was 1 W. An optical fiber with a diameter of 400 µm was used. 21 patients with pigmented gingiva were selected. Depigmentation was carried out in a split-mouth design for a direct comparison of the clinical effect. Outcomes were documented by photograph after one month and six months of follow-up. Results: For each wavelength, 21 volunteers evaluated 21 clinical cases of depigmentation, which means that 441 comparisons were carried out in total regarding the color change from brownish to pinkish. A 100% clarification was achieved for 445 nm. In the 810 nm group, the color change in 44 of 441 cases (10%) could not be clearly identified. No statistically significant difference in pain experience was reported for both laser treatments. Conclusion: The clinical evaluation showed that within the limitations of this study, most of the clinical outcome parameters were highly acceptable by the patients due to mild pain and discomfort for both laser systems.
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Affiliation(s)
- Seyed Masoud Mojahedi Nasab
- Department of Periodontology, Operative and Preventive Dentistry, 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, Tehran, Iran
| | - Matthias Frentzen
- Department of Periodontology, Operative and Preventive Dentistry, Bonn University, Welschnonnenstrasse 17, 53111 Bonn, Germany
- Center of Applied Medical Laser Research and Biomedical Optics (AMLaReBO), Bonn University, Welschnonnenstrasse 17, 53111 Bonn, Germany
| | - Andreas Mayr
- Institute for Medical Biometry, Informatics and Epidemiology (IMBIE), Bonn University, Venusberg-Campus 1 Bldg. 11, 53127 Bonn, Germany
| | - Somayeh Rahmani
- Department of Oral and Maxillofacial Medicine, Shahid Beheshti Dental School, Tehran, Iran
| | - Fahimeh Anbari
- Department of Oral and Maxillofacial Medicine, Shahid Beheshti Dental School, Tehran, Iran
| | - Jörg Meister
- Department of Periodontology, Operative and Preventive Dentistry, 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, Tehran, Iran
| | - Saranaz Azari-Marhabi
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Jacob O, Kosala M, Panwar M. Evaluation of treatment outcome in gingival hyperpigmentation with scalpel Vis-a-Vis Laser: A split-mouth study. INDIAN JOURNAL OF DENTAL SCIENCES 2021. [DOI: 10.4103/ijds.ijds_161_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Shen YS, Chen XJ, Wuri SN, Yang F, Pang FX, Xu LL, He W, Wei QS. Polydatin improves osteogenic differentiation of human bone mesenchymal stem cells by stimulating TAZ expression via BMP2-Wnt/β-catenin signaling pathway. Stem Cell Res Ther 2020; 11:204. [PMID: 32460844 PMCID: PMC7251742 DOI: 10.1186/s13287-020-01705-8] [Citation(s) in RCA: 16] [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: 12/14/2019] [Revised: 04/21/2020] [Accepted: 05/05/2020] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES Polydatin (PD), extracted from Polygonum cuspidatum, has shown potential therapeutic applications due to its antiosteoporotic and anti-inflammatory activities. Our previous study suggested that PD promotes the osteogenesis of human bone marrow stromal cells (hBMSCs) via the BMP2-Wnt/β-catenin pathway. The aim of our present study was to further explore the role of PD-mediated regulation of Tafazzin (TAZ), a transcriptional coactivator with a PDZ-binding motif, in osteogenesis. MATERIALS AND METHODS hBMSCs were isolated and treated with PD at various concentrations. Alizarin red staining and RT-qPCR were performed to identify calcium complex deposition in hBMSCs as well as the expression of specific osteoblast-related markers, respectively, in each group. Next, TAZ-silenced hBMSCs were generated by lentivirus-produced TAZ shRNA. After treatment with PD, the osteogenic abilities of the TAZ-silenced and control hBMSCs were estimated by ALP activity assay, and expression of the TAZ protein was detected by Western blot analysis and immunofluorescence staining. In vitro, an ovariectomized (OVX) mouse model was established and used to evaluate the effect of PD on bone destruction by micro-CT, immunohistochemistry, and ELISA. RESULTS In vitro, 30 μM PD significantly improved the proliferation and calcium deposition of hBMSCs and markedly stimulated the expression of the mRNAs RUNX2, Osteopontin, DLX5, β-catenin, TAZ, and Osteocalcin (OCN). Osteogenic differentiation induced by PD was blocked by lentivirus-mediated TAZ shRNA. Furthermore, Noggin (a regulator of bone morphogenic protein 2 (BMP2)) and DKK1 (an inhibitor of the Wnt/β-catenin pathway) were found to inhibit the increase in TAZ expression induced by PD. In vivo, PD prevented estrogen deficiency-induced bone loss in the OVX mouse model. CONCLUSION Taken together, our findings suggest that PD improved the osteogenic differentiation of hBMSCs and maintained the bone matrix in the OVX mouse model through the activation of TAZ, a potential target gene of the BMP2-Wnt/β-catenin pathway.
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Affiliation(s)
- Ying-Shan Shen
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Xiao-Jun Chen
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Sha-Na Wuri
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Fan Yang
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Feng-Xiang Pang
- First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Liang-Liang Xu
- Key Laboratory of Orthopaedics & Traumatology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wei He
- Hip Preserving Ward, No. 3 Orthopaedic Region, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
- No. 3 Orthopaedic Region and Institute of the Hip Joint, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Qiu-Shi Wei
- Hip Preserving Ward, No. 3 Orthopaedic Region, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
- No. 3 Orthopaedic Region and Institute of the Hip Joint, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
- Third Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
- The Third Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
- Institute of orthopedics of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
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Gul M, Hameed MH, Nazeer MR, Ghafoor R, Khan FR. Most effective method for the management of physiologic gingival hyperpigmentation: A systematic review and meta-analysis. J Indian Soc Periodontol 2019; 23:203-215. [PMID: 31143000 PMCID: PMC6519100 DOI: 10.4103/jisp.jisp_555_18] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Background and Aim: Gingival hyperpigmentation is an esthetic problem. The aim of the present study was to identify most effective treatment modality for managing generalized physiological gingival pigmentation. Materials and Methods: A systematic review and meta-analysis were done (1919 to October 2018) using PubMed, CINHAL, Dental and Oral Science, and manual searches. Twenty-five articles were finally reviewed. Only human clinical trials were considered with physiological gingival pigmentation treated with different depigmentation methods and compared with surgical stripping. The outcome was the achievement of gingival depigmentation and its recurrence. RevMan software was used for data analysis. Results: Of 26,132 articles, 25 met the inclusion criteria. Seventeen were randomized control trials and 8 were nonrandomized control trials. Most of the studies were on laser. The control group was scalpel surgery. Majority of studies showed no difference in compared treatment modality. A meta-analysis compared laser ablation with surgical stripping revealed a nonsignificance difference regarding recurrence (P = 0.75) and depigmentation (P = 0.23) and a statistically significant difference regarding postoperative pain favoring laser ablation (P ≤ 0.05). Conclusions: Surgical stripping has been the conventional treatment of choice, but our review showed that new techniques are equally effective or even better. Laser especially diode laser was the most frequently used technique and showed better esthetic outcomes, less pain, faster healing, and patients' preference and satisfaction after treatment. However, laser showed more regimentation at 6-month evaluation. More good quality randomized controlled trials with different depigmentation methods are needed to draw strong conclusions.
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Affiliation(s)
- Meisha Gul
- Department of Surgery, Section of Dentistry, JHS Building, Aga Khan University Hospital, Karachi, Pakistan
| | - Muhammad Hasan Hameed
- Department of Surgery, Section of Dentistry, JHS Building, Aga Khan University Hospital, Karachi, Pakistan
| | - Muhammad Rizwan Nazeer
- Department of Operative Dentistry, Bahria University Medical and Dental College, Karachi, Pakistan
| | - Robia Ghafoor
- Department of Surgery, Section of Dentistry, JHS Building, Aga Khan University Hospital, Karachi, Pakistan
| | - Farhan Raza Khan
- Department of Surgery, Section of Dentistry, JHS Building, Aga Khan University Hospital, Karachi, Pakistan
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Chhina S, Gakhar A, Gupta S, ss S, Sharma E, Arora SA. Assessment of Clinical Outcomes and Patient Response to Gingival Depigmentation by Scalpel Surgical Stripping and Diode Laser: A Randomized Split-Mouth Study. JOURNAL OF ADVANCED ORAL RESEARCH 2019. [DOI: 10.1177/2320206818820995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Oral melanin pigmentation is a ubiquitous presentation in the oral cavity. It could be a cause of psychological distress to many subjects due to aesthetic reasons. Aims and Objectives: This study attempts to compare the laser and scalpel depigmentation techniques. It also includes a comparison related to the Visual Analog Scale, patient comfort, healing response and time taken for the procedure and recurrence of pigmentation. Materials and Methods: A total of 10 patients were included in the study. A split-mouth approach comparing the scalpel technique with that of the diode laser technique was planned. Results and Conclusion: The results of the present study revealed that both laser and scalpel techniques are equally effective for depigmentation, yielding aesthetic results.
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Affiliation(s)
- Shivjot Chhina
- Department of Periodontics, ITS Dental College, Hospital & Research Centre, Greater Noida, Uttar Pradesh, India
| | - Abhishek Gakhar
- Department of Periodontics, ITS Dental College, Hospital & Research Centre, Greater Noida, Uttar Pradesh, India
| | - Stuti Gupta
- Department of Periodontics, ITS Dental College, Hospital & Research Centre, Greater Noida, Uttar Pradesh, India
| | - Shradha ss
- Department of Periodontics, ITS Dental College, Hospital & Research Centre, Greater Noida, Uttar Pradesh, India
| | - Ejya Sharma
- Department of Periodontics, ITS Dental College, Hospital & Research Centre, Greater Noida, Uttar Pradesh, India
| | - Sachit Anand Arora
- Department of Periodontics, ITS Dental College, Hospital & Research Centre, Greater Noida, Uttar Pradesh, India
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