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Ferreira CL, Neves Jardini MA, Moretto Nunes CM, Bernardo DV, Viana Casarin RC, Dos Santos Gedraite E, Mathias MA, Liu F, Mendonça G, Silveira Mendonça DB, Santamaria MP. Electrical stimulation enhances early palatal wound healing in mice. Arch Oral Biol 2020; 122:105028. [PMID: 33360374 DOI: 10.1016/j.archoralbio.2020.105028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 12/07/2020] [Accepted: 12/10/2020] [Indexed: 01/02/2023]
Abstract
BACKGROUND/OBJECTIVE Electrical stimulation (ES) has been used to treat chronic wound and other clinical applications, showing favorable results in wound closure. It was hypothesized that ES can present a positive effect on oral mucosa healing. The aim of this study was to investigate the effects of ES during the palatal mucosa early healing process in Swiss mice. METHODS Ninety animals were divided into two groups: Control (C; n = 45), which received Sham ES applications, and Test (ES; n = 45), which received ES (100 μA; 9 kHz; 660 mVpp) once a day for 3 days. A full thickness wound was performed with a 1.5 mm diameter biopsy punch in the hard palate. Histologically, the following parameters were evaluated: palatal wound closure and epithelial and connective wound edge distance (EED and CED). Furthermore, IL-1β, IL-6, IL-10 TNF-α, and VEGF cytokine levels were evaluated by multiplex assay. The percentage of collagen fibers was assessed using the polarization method and the Smad proteins using the immunofluorescence method. RESULTS Palatal wound closure presented a significant reduction on day 5 in the ES group (p = 0.01). Additionally, both EED and CED were shorter for all time points in the ES group (p < 0.05), and the inflammatory markers IL-6, IL-10, TNF-α, and VEGF were reduced (p < 0.05). There were no differences in collagen fibers and phospho-Smad2 between the groups. CONCLUSION ES had a positive effect on early palatal wound closure outcomes, as well as on inflammatory markers.
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Affiliation(s)
- Camila Lopes Ferreira
- Postgraduate Student, Oral Biopathology Program, Periodontics Area, São Paulo State University (UNESP), College of Dentistry, São José dos Campos, Brazil
| | - Maria Aparecida Neves Jardini
- São Paulo State University (UNESP), Division of Periodontics, Institute of Science and Technology, São José dos Campos, São Paulo, Brazil
| | - Camilla Magnoni Moretto Nunes
- Postgraduate Student, Oral Biopathology Program, Periodontics Area, São Paulo State University (UNESP), College of Dentistry, São José dos Campos, Brazil
| | - Daniella Vicensotto Bernardo
- Postgraduate Student, Oral Biopathology Program, Periodontics Area, São Paulo State University (UNESP), College of Dentistry, São José dos Campos, Brazil
| | - Renato Corrêa Viana Casarin
- University of Campinas (UNICAMP). Department of Prosthodontics and Periodontics, Division of Periodontics, Piracicaba Dental School, Piracicaba, São Paulo, Brazil
| | | | | | - Fei Liu
- University of Michigan, School of Dentistry, Department of Biologic and Materials Sciences & Prosthodontics, Ann Arbor, USA
| | - Gustavo Mendonça
- University of Michigan, School of Dentistry, Department of Biologic and Materials Sciences & Prosthodontics, Ann Arbor, USA
| | | | - Mauro Pedrine Santamaria
- São Paulo State University (UNESP), Division of Periodontics, Institute of Science and Technology, São José dos Campos, São Paulo, Brazil.
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Haghnegahdar A, Khosrovpanah H, Andisheh-Tadbir A, Mortazavi G, Saeedi Moghadam M, Mortazavi SMJ, Zamani A, Haghani M, Shojaei Fard M, Parsaei H, Koohi O. Design and fabrication of helmholtz coils to study the effects of pulsed electromagnetic fields on the healing process in periodontitis: preliminary animal results. J Biomed Phys Eng 2014; 4:83-90. [PMID: 25505775 PMCID: PMC4258865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Indexed: 06/04/2023]
Abstract
BACKGROUND Effects of electromagnetic fields on healing have been investigated for centuries. Substantial data indicate that exposure to electromagnetic field can lead to enhanced healing in both soft and hard tissues. Helmholtz coils are devices that generate pulsed electromagnetic fields (PEMF). Objective : In this work, a pair of Helmholtz coils for enhancing the healing process in periodontitis was designed and fabricated. METHOD An identical pair of square Helmholtz coils generated the 50 Hz magnetic field. This device was made up of two parallel coaxial circular coils (100 turns in each loop, wound in series) which were separated from each other by a distance equal to the radius of one coil (12.5 cm). The windings of our Helmholtz coil was made of standard 0.95mm wire to provide the maximum possible current. The coil was powered by a function generator. RESULTS The Helmholtz Coils generated a uniform magnetic field between its coils. The magnetic field strength at the center of the space between two coils was 97.6 μT. Preliminary biological studies performed on rats show that exposure of laboratory animals to pulsed electromagnetic fields enhanced the healing of periodontitis. CONCLUSION Exposure to PEMFs can lead to stimulatory physiological effects on cells and tissues such as enhanced healing of periodontitis.
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Affiliation(s)
- A Haghnegahdar
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - H Khosrovpanah
- Department of Periodontology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - A Andisheh-Tadbir
- Department of Oral and Maxillofacial Pathology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Gh Mortazavi
- Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Saeedi Moghadam
- Ionizing and Non-ionizing Radiation Protection Research Centre (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - SMJ Mortazavi
- Ionizing and Non-ionizing Radiation Protection Research Centre (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
- Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - A Zamani
- Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Haghani
- Ionizing and Non-ionizing Radiation Protection Research Centre (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Shojaei Fard
- Ionizing and Non-ionizing Radiation Protection Research Centre (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - H Parsaei
- Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - O Koohi
- Animal laboratory, Shiraz University of Medical Sciences, Shiraz, Iran
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