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Chaves IC, de Paula DS, Mota MRL, Sousa FB, de Barros Silva PG, Nunes Alves APN. Is photobiomodulation effective during maxillary expansion? A systematic review and meta-analysis. Orthod Craniofac Res 2023; 26:13-26. [PMID: 35545921 DOI: 10.1111/ocr.12590] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 04/27/2022] [Accepted: 05/05/2022] [Indexed: 01/07/2023]
Abstract
We performed a systematic review on literature associated with meta-analyses to elucidate whether (I) low-level laser therapy (C) compared to placebo accelerates (O) bone neoformation in the region of the midpalatal suture in (P) patients undergoing transverse maxillary expansion. Two reviewers blindly performed targeted searches using the selection criteria (PICOS) in seven major databases and three grey literature databases, employing specific terms and their entrenchments. The RevMan® software (Review Manager, version 5.3, Cochrane Collaboration) was used to adapt the RoB summary illustration to the Cochrane 2.0 tool questions. Meta-analysis was performed using standardized mean difference (SMD) and Cohen's d calculation on random effects, tests for heterogeneity (I2 ) and publication bias (Egger and Begg), and one-of-out sensitivity analysis. GRADE (Grading of Recommendations Assessment, Development and Evaluation) was used for evidence quality analysis. Among the five studies included in the qualitative synthesis, three were included in the meta-analysis. All analysed studies were prospective randomized clinical trials. The risk of bias was such that the Egger (P = .1991) and Begg (P = .024) tests showed no significant risk of publication bias. The meta-analysis showed high heterogeneity (I2 = 81%, P < .00001), and 3 months after the operation, there was no significant difference between the photobiomodulation (PBMT) group and control group (P = .850) or between the subgroups of the periods evaluated after 3 months (P = 0.490). GRADE showed an SMD of 0.62. Photobiomodulation as an adjuvant therapy in patients undergoing transverse maxillary expansion has few benefits and is limited in shape, as it contributes to bone healing in the midpalatal suture region after a period of 3 months.
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Affiliation(s)
- Igor Carvalho Chaves
- Post-Graduate Program in Clinical Dentistry, Federal University of Ceará, Fortaleza, Brazil
| | | | | | - Fabrício Bitu Sousa
- Post-Graduate Program in Clinical Dentistry, Federal University of Ceará, Fortaleza, Brazil.,Post-graduate Program in Dental Sciences, Unichristus, Fortaleza, Brazil
| | - Paulo Goberlânio de Barros Silva
- Post-Graduate Program in Clinical Dentistry, Federal University of Ceará, Fortaleza, Brazil.,Post-graduate Program in Dental Sciences, Unichristus, Fortaleza, Brazil
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Photobiomodulation stimulates surrounding bone formation and increases stability of titanium alloy miniscrews in ovariectomized rats. Lasers Med Sci 2022; 37:2917-2924. [PMID: 35420398 DOI: 10.1007/s10103-022-03560-w] [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: 03/29/2021] [Accepted: 04/04/2022] [Indexed: 10/18/2022]
Abstract
The number of older individuals (> 60 years) treated in orthodontic dental practice is constantly growing, and osteoporosis is a common disease within this age range. Orthodontic treatment for this group tends to be challenging, often requiring the use of mini-implants. Mini-implants are important accessories in orthodontic treatment that provide solutions to complex cases. Despite the high level of success, these devices are prone to failure if insufficient bone stability is achieved. This study aimed to evaluate the effects of photobiomodulation on bone neoformation around mini-implants using fluorescence analysis in ovariectomized rats. A total of 12 female rats (Wistar) were ovariectomized and divided into three groups: two groups of low-level laser therapy irradiation in two different protocols, as follows: in the PBM1 group, applications were performed using 2 J, for 20 s each for 48 h, 6 irradiations in total, and in the PBM2 group, a single application of 4 J was performed for 40 s, and the third group represented the control group, and no laser therapy was applied. Each rat received two mini-implants placed immediately behind the upper incisors, and 0 g of force was applied using a NiTi spring. All rats received two bone markers, tetracycline (days 0-4) and alizarin (days 7-10), for 5 days each. Both markers were bound to calcium, allowing visualization of bone neoformation through fluorescence microscopy. After 12 days, euthanasia was performed; the results revealed that both irradiated groups showed significantly greater bone neoformation compared to the control group (p < 0.05). Mini-implant stability was measured in all animals using the Periotest device on day 0 and on the day of euthanasia. A significant increase in stability was observed in the group that received more laser application (p < 0.05). Photobiomodulation had a positive effect on bone neoformation around mini-implants in ovariectomized rats, with an increase in stability when more irradiation was performed.
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da Fonseca GAMD, Cavalcanti MFXB, de Souza Maior JD, da Silva Pereira J, Pinto LA, Matias M, Frigo L. Laser-photobiomodulation on titanium implant bone healing in rat model: comparison between 660- and 808-nm wavelength. Lasers Med Sci 2022; 37:2179-2184. [PMID: 35028766 DOI: 10.1007/s10103-021-03481-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 11/26/2021] [Indexed: 10/19/2022]
Abstract
Laser-photobiomodulation (L-PBM) has been widely studied and its biomodulatory effects have been established on irradiated cells, increasing viability and proliferation and on damaged tissues. In addition, L-PBM may reduce and modulate the inflammatory process. The effect of 660-nm and 808-nm laser-photobiomodulation on bone repair around titanium dental implants placed in rat's femur was evaluated by histomorphometry. Twenty-seven Wistar rats were divided into 3 groups of nine animals: group C - non-irradiated control; group R - λ=660nm irradiated; and group IR - λ=808nm irradiated. Each group was further divided in 3 subgroups of three animals each, according to histomorphometry analysis in 3 days, 7 days, and 14 days after irradiation. Histological H.E.-stained slides were photographed, and bone matrix measured in new-formed bone area. Bone matrix histomorphometry analysis indicates that at 7 days in the irradiated groups (R and IR), a bigger area matrix was observed in relation to control group (C) (p=0.04 and p=0.048 respectively). On the other hand, at 14 days, control group (C) presented a bigger area than infrared irradiated (IR) (p=0.001) and red irradiated group (R) also showed a bigger area than infrared irradiated group (IR) (p=0.019). Histological analysis indicates that irradiated groups (R and IR) exhibited a faster bone tissue matrix production than control group.
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Affiliation(s)
| | | | - José Daniel de Souza Maior
- Experimental Surgery Department of Pernambuco Federal University, Av. Prof. Moraes Rego, 1235 - Cidade Universitária, Recife, PE, Cep 50670-901, Brazil
| | - Juliana da Silva Pereira
- Periodontology Program of Guarulhos University, praça Teresa Cristina 01, Guarulhos, São Paulo, SP, Cep 07023-070, Brazil
| | - Leandro Augusto Pinto
- Periodontology Program of Guarulhos University, praça Teresa Cristina 01, Guarulhos, São Paulo, SP, Cep 07023-070, Brazil
| | - Murilo Matias
- Implantology Program of Guarulhos University, praça Teresa Cristina 01, Guarulhos, São Paulo, Cep 07023-070, Brazil
| | - Lucio Frigo
- Implantology Program of Guarulhos University, praça Teresa Cristina 01, Guarulhos, São Paulo, Cep 07023-070, Brazil.
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de Souza Rastelli AN. Antimicrobial Photodynamic Therapy (aPDT) as a Disinfection and Biomodulation Approach in Implant Dentistry. Photochem Photobiol 2021; 97:1155-1160. [PMID: 34420213 DOI: 10.1111/php.13509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 08/20/2021] [Indexed: 01/03/2023]
Abstract
This article is a highlight of the paper by Choe et al. in this issue of Photochemistry and Photobiology. In that review paper, the disinfection and biomodulation outcomes promoted by antimicrobial photodynamic therapy (aPDT) on peri-implantitis infection were stated and discussed. The killing of the oral pathogens by aPDT is based on the generation of reactive oxygen species (ROS). Besides that, biomodulation can also be provided by aPDT and improve the healing and modulate the inflammatory process. Although aPDT has shown positive effects on the treatment of peri-implantitis disease mainly as a complimentary technique, the authors suggested that more and standardize clinical studies are needed to support the clinical application of aPDT for that purpose. Also, the standardization of parameters related to the light source and photosensitizers is required. In addition, nano-based materials may improve aPDT performance against oral biofilms and could increase the hopes of overcoming dental implant failures.
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Shoushrah SH, Transfeld JL, Tonk CH, Büchner D, Witzleben S, Sieber MA, Schulze M, Tobiasch E. Sinking Our Teeth in Getting Dental Stem Cells to Clinics for Bone Regeneration. Int J Mol Sci 2021; 22:6387. [PMID: 34203719 PMCID: PMC8232184 DOI: 10.3390/ijms22126387] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/27/2021] [Accepted: 06/02/2021] [Indexed: 12/12/2022] Open
Abstract
Dental stem cells have been isolated from the medical waste of various dental tissues. They have been characterized by numerous markers, which are evaluated herein and differentiated into multiple cell types. They can also be used to generate cell lines and iPSCs for long-term in vitro research. Methods for utilizing these stem cells including cellular systems such as organoids or cell sheets, cell-free systems such as exosomes, and scaffold-based approaches with and without drug release concepts are reported in this review and presented with new pictures for clarification. These in vitro applications can be deployed in disease modeling and subsequent pharmaceutical research and also pave the way for tissue regeneration. The main focus herein is on the potential of dental stem cells for hard tissue regeneration, especially bone, by evaluating their potential for osteogenesis and angiogenesis, and the regulation of these two processes by growth factors and environmental stimulators. Current in vitro and in vivo publications show numerous benefits of using dental stem cells for research purposes and hard tissue regeneration. However, only a few clinical trials currently exist. The goal of this review is to pinpoint this imbalance and encourage scientists to pick up this research and proceed one step further to translation.
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Affiliation(s)
| | | | | | | | | | | | | | - Edda Tobiasch
- Department of Natural Sciences, Bonn-Rhein-Sieg University of Applied Sciences, von-Liebig- Strasse. 20, 53359 Rheinbach, Germany; (S.H.S.); (J.L.T.); (C.H.T.); (D.B.); (S.W.); (M.A.S.); (M.S.)
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Oliveira GJPLD, Pinotti FE, Aroni MAT, Marcantonio E, Marcantonio RAC. Effect of different low-level intensity laser therapy (LLLT) irradiation protocols on the osseointegration of implants placed in grafted areas. J Appl Oral Sci 2021; 29:e20200647. [PMID: 33886940 PMCID: PMC8054649 DOI: 10.1590/1678-7757-2020-0647] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 12/14/2020] [Accepted: 01/15/2021] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE To evaluate the effect of different protocols of low-level intensity laser therapy (LLLT) irradiation on the osseointegration of implants placed in grafted areas. METHODOLOGY 84 rats were randomly allocated into six groups: DBB: defect filled with deproteinized bovine bone; HA/TCP: defect filled with biphasic ceramic of hydroxyapatite/β-tricalcium phosphate ; DBB-LI: defect filled with DBB and treated with LLLT after implant placement; HA/TCP-LI: defect filled with HA/TCP and treated with LLLT after implant placement; DBB-LIB: defect filled with DBB and treated with LLLT after graft procedure and implant placement; and HA/TCP-LIB: defect filled HA/TCP and treated with LLLT after graft procedure and implant placement. The bone defects were made in the tibia and they were grafted. After 60 days, the implants were placed. The rats were subsequently subjected to euthanasia 15 and 45 days after implant placement. The pattern of osseointegration and bone repair in the grafted area was evaluated by biomechanical, microtomographic, and histometric analyses. Furthermore, the expression of bone biomarker proteins was assessed. RESULTS The LLLT groups presented higher removal torque, mineralized tissue volume, and a greater degree of osseointegration, especially when LLLT was performed only after implant placement, and these findings were associated with higher expression of BMP2 and alkaline phosphatase. CONCLUSION LLLT performed on implants placed in grafted areas enhances the osseointegration process.
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Affiliation(s)
| | - Felipe Eduardo Pinotti
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araraquara, Departmento de Diagnóstico e Cirurgia, Araraquara, SP, Brasil
| | | | - Elcio Marcantonio
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araraquara, Departmento de Diagnóstico e Cirurgia, Araraquara, SP, Brasil
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Vasconcellos LMR, Santana-Melo GF, Silva E, Pereira VF, Araújo JCR, Silva ADR, Furtado ASA, Elias CDMV, Viana BC, Marciano FR, Lobo AO. Electrospun Poly(butylene-adipate-co-terephthalate)/Nano-hyDroxyapatite/Graphene Nanoribbon Scaffolds Improved the In Vivo Osteogenesis of the Neoformed Bone. J Funct Biomater 2021; 12:11. [PMID: 33562592 PMCID: PMC7931057 DOI: 10.3390/jfb12010011] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 02/07/2023] Open
Abstract
Electrospun ultrathin fibrous scaffold filed with synthetic nanohydroxyapatite (nHAp) and graphene nanoribbons (GNR) has bioactive and osteoconductive properties and is a plausible strategy to improve bone regeneration. Poly(butylene-adipate-co-terephthalate) (PBAT) has been studied as fibrous scaffolds due to its low crystallinity, faster biodegradability, and good mechanical properties; however, its potential for in vivo applications remains underexplored. We proposed the application of electrospun PBAT with high contents of incorporated nHAp and nHAp/GNR nanoparticles as bone grafts. Ultrathin PBAT, PBAT/nHAp, and PBAT/nHAp/GNR fibers were produced using an electrospinning apparatus. The produced fibers were characterized morphologically and structurally using scanning electron (SEM) and high-resolution transmission electron (TEM) microscopies, respectively. Mechanical properties were analyzed using a texturometer. All scaffolds were implanted into critical tibia defects in rats and analyzed after two weeks using radiography, microcomputed tomography, histological, histomorphometric, and biomechanical analyses. The results showed through SEM and high-resolution TEM characterized the average diameters of the fibers (ranged from 0.208 µm ± 0.035 to 0.388 µm ± 0.087) and nHAp (crystallite around 0.28, 0.34, and 0.69 nm) and nHAp/GNR (200-300 nm) nanoparticles distribution into PBAT matrices. Ultrathin fibers were obtained, and the incorporated nHAp and nHAp/GNR nanoparticles were well distributed into PBAT matrices. The addition of nHAp and nHAp/GNR nanoparticles improved the elastic modulus of the ultrathin fibers compared to neat PBAT. High loads of nHAp/GNR (PBATnH5G group) improved the in vivo lamellar bone formation promoting greater radiographic density, trabecular number and stiffness in the defect area 2 weeks after implantation than control and PBAT groups.
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Affiliation(s)
- Luana Marotta Reis Vasconcellos
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Sao Paulo State University, Sao Paulo 12450-000, Brazil; (G.F.S.-M.); (E.S.); (V.F.P.); (J.C.R.A.)
| | - Gabriela F. Santana-Melo
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Sao Paulo State University, Sao Paulo 12450-000, Brazil; (G.F.S.-M.); (E.S.); (V.F.P.); (J.C.R.A.)
| | - Edmundo Silva
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Sao Paulo State University, Sao Paulo 12450-000, Brazil; (G.F.S.-M.); (E.S.); (V.F.P.); (J.C.R.A.)
| | - Vanessa Fernandes Pereira
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Sao Paulo State University, Sao Paulo 12450-000, Brazil; (G.F.S.-M.); (E.S.); (V.F.P.); (J.C.R.A.)
| | - Juliani Caroline Ribeiro Araújo
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Sao Paulo State University, Sao Paulo 12450-000, Brazil; (G.F.S.-M.); (E.S.); (V.F.P.); (J.C.R.A.)
| | | | - André S. A. Furtado
- LIMAV—Interdisciplinary Laboratory for Advanced Materials, UFPI-Federal University of Piaui, Teresina 64049-550, Brazil;
| | | | - Bartolomeu Cruz Viana
- Department of Physics, Federal University of Piaui, Teresina 64049-550, Brazil; (B.C.V.); (F.R.M.)
| | | | - Anderson Oliveira Lobo
- LIMAV—Interdisciplinary Laboratory for Advanced Materials, UFPI-Federal University of Piaui, Teresina 64049-550, Brazil;
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Zhang R, Yang M, Li Y, Liu H, Ren M, Tao ZS. Effect of alendronate on the femoral metaphyseal defect under carbamazepine in ovariectomized rats. J Orthop Surg Res 2021; 16:14. [PMID: 33407695 PMCID: PMC7788868 DOI: 10.1186/s13018-020-02151-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 12/09/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The use of antiepileptic drugs and estrogen deficiency put forward higher requirements for bone defect regeneration. The present study investigated the effects of alendronate (ALN) on femoral bone defect in ovariectomized (OVX) rats under the influence of carbamazepine (CBZ). METHODS One hundred female SD rats at 3 months of age were either sham-operated or OVX and divided into four groups: sham control (CON); OVX control (OVX); ovariectomized rats treated with CBZ via gavage (75 mg/kg/day; CBZ); ovariectomized rats treated with CBZ plus ALN (2 mg/kg/day; CBZ-ALN). A critical-sized femoral metaphyseal bone defect was established in all female SD rats. Animals from the CBZ and CBZ-ALN groups received drugs by gavage the day after bone defect surgery was performed. After the rats were sacrificed, the defected area located in the distal femur was harvested for evaluation by microcomputed tomography (micro-CT), hematoxylin and eosin (HE) staining, and Masson's trichrome staining. The samples were also analyzed by biomechanics and immunohistochemical evaluation (IHC). Besides, biochemical analysis evaluates all serum samples. RESULTS The present study showed that ovariectomy changed the microstructural parameters of bone. The use of CBZ further decreased femur bone mass while treatment with ALN prevented bone loss. Compared to OVX and CBZ groups, CBZ-ALN group promoted bone neoformation and enhanced the ultimate load of the femur bone. However, the group of CBZ-ALN did not return to normal levels compared with the CON group. Besides, we noticed that CBZ-ALN group reduced tartrate-resistant acid phosphatase-5b (Tracp-5b) expression and had no significant effect on the expression of osteocalcin (OCN) and type I collagen (Col-I) in IHC compared with CBZ group. Biochemical analysis results presented that systemic delivery of CBZ showed pernicious effects on bone formation and resorption in ovariectomized rats, with the worse effects on C-terminal crosslinked telopeptide of type I collagen (CTX-1). Besides, a significant decrease in CTX-1 levels was observed in CBZ-ALN group as compared to the group of CBZ. CONCLUSION These results demonstrated that ALN can effectively reverse the effects of CBZ on the microarchitectural properties of bone, and thus can have a positive effect on local bone neoformation in rats with osteoporosis. CLINICAL RELEVANCE The dose of 2 mg/kg ALN improves the negative effect of prescription of CBZ at 75 mg/kg and promotes bone neoformation of femoral bony deficits.
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Affiliation(s)
- Ruotian Zhang
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College,Yijishan Hospital, No. 2, Zhe shan Xi Road, Anhui, 241001, Wuhu, People's Republic of China
| | - Min Yang
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College,Yijishan Hospital, No. 2, Zhe shan Xi Road, Anhui, 241001, Wuhu, People's Republic of China.
| | - Yang Li
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College,Yijishan Hospital, No. 2, Zhe shan Xi Road, Anhui, 241001, Wuhu, People's Republic of China
| | - Hedong Liu
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College,Yijishan Hospital, No. 2, Zhe shan Xi Road, Anhui, 241001, Wuhu, People's Republic of China
| | - Maoxian Ren
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College,Yijishan Hospital, No. 2, Zhe shan Xi Road, Anhui, 241001, Wuhu, People's Republic of China
| | - Zhou-Shan Tao
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College,Yijishan Hospital, No. 2, Zhe shan Xi Road, Anhui, 241001, Wuhu, People's Republic of China
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Karakaya M, Demirbaş AE. Effect of low-level laser therapy on osseointegration of titanium dental implants in ovariectomized rabbits: biomechanics and micro-CT analysis. Int J Implant Dent 2020; 6:61. [PMID: 33043397 PMCID: PMC7548265 DOI: 10.1186/s40729-020-00257-z] [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: 01/27/2020] [Accepted: 08/31/2020] [Indexed: 11/10/2022] Open
Abstract
PURPOSE The primary aim of this study is to assess, in an animal model, whether biostimulation of osteoporotic bone with low-level laser therapy improves the osseointegration of dental implants. MATERIAL AND METHODS Twenty-two female rabbits were randomly divided into two groups: sham-ovariectomy and bilateral-ovariectomy. Laser therapy was applied to the implants placed in the right tibial bones and was not applied to implants placed in the left tibial bones. The periotest device was used for the stability test. Periotest values were recorded after the implantation (T0) and when the animals were euthanized (T1). The removal torque test and micro-computed tomography examination were evaluated. RESULTS As a result of removal torque, the mean of ovariectomy-laser group (56.1 ± 5.1 Ncm) was higher than sham-ovariectomy group (55.4 ± 18.5 Ncm) (p = 0.9). In periotest analysis, a significant difference was found between the values of T1 and T0 in all groups, except sham-ovariectomy group (p < 0.05); and the highest difference was found in the ovariectomy-laser group. Micro-CT examination demonstrated that ovariectomy-laser group showed an increase of implant-bone contact when compared with ovariectomy (p < 0.05). CONCLUSIONS The values obtained from biomechanical tests and micro-CT in the ovariectomy-laser group were significantly higher than the ovariectomy group and achieved the values in the healthy bone.
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Affiliation(s)
- Mustafa Karakaya
- Sancaktepe Oral and Dental Health Hospital, Department of Oral and Maxillofacial Surgery, Ministry of Health, İstanbul, Turkey.
| | - Ahmet Emin Demirbaş
- Department of Oral and Maxillofacial Surgery, Erciyes University Faculty of Dentistry, Melikgazi, Kayseri, Turkey
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Low-level laser therapy (LLLT) in sites grafted with osteoconductive bone substitutes improves osseointegration. Lasers Med Sci 2020; 35:1519-1529. [DOI: 10.1007/s10103-019-02943-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 12/22/2019] [Indexed: 10/25/2022]
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de Vasconcellos LMR, Camporês KL, de Alcântara Abdala JM, Vieira MN, de Oliveira IR. Biological and microbiological behavior of calcium aluminate cement-based blend for filling of bone defects. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 31:10. [PMID: 31873807 DOI: 10.1007/s10856-019-6348-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 12/11/2019] [Indexed: 06/10/2023]
Abstract
Calcium aluminate cement (CAC) as a biomaterial has been evaluated for its physical, mechanical and biocompatibility properties. Furthermore, the application of CAC for bone repair is due to its composition and coefficient of thermal expansion, which is similar to that of human bone. Thus, the aim of this study was to evaluate compositions of CAC-based blends as substitutes for bone defects. Five compositions of blends (alumina, zirconia, hydroxyapatite, tricalcium phosphate, chitosan), in addition to the base cement consisting of homogeneous CAC were evaluated as a substitute for bone repair. Additionally, the monotypic biofilm formation was assessed. Creation of a monocortical bone defect was performed on the femurs of rats, which were randomly filled with the different materials. The polymethylmethacrylate (PMMA) group was used as a control. All the animals were euthanized 04 weeks after the surgery procedure. Subsequently, computerized microtomography, histological and histomorphometric analyses were performed to verify the bone repair. To evaluate the formation of biofilms, reference strains of Staphylococcus aureus, Streptococcus mutans and Pseudomonas aeruginosa were cultured on the samples, and the biofilm formed was quantified by the MTT method. In the microtomography and histomorphometry results, it was observed that the blends exhibited better results than the control group, with statistically significant differences (p < 0.05) for alumina and zirconia blends. In the biofilm formation, a statistical difference (p < 0.05) in general was observed between the alumina blends and the control group (p < 0.05). It was concluded that CAC-based blends with alumina and zirconia are promising for use in fillings for bone repair.
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Affiliation(s)
- Luana Marotta Reis de Vasconcellos
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology of São José dos Campos, University Estadual Paulista-UNESP, Sao Jose dos Campos, SP, Brazil.
| | - Kaíke Lessa Camporês
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology of São José dos Campos, University Estadual Paulista-UNESP, Sao Jose dos Campos, SP, Brazil
| | | | - Marilia Nanni Vieira
- Graduated student of Institute of Science and Technology of São José dos Campos, University Estadual Paulista-UNESP, Sao Jose dos Campos, SP, Brazil
| | - Ivone Regina de Oliveira
- Institute for Research and Development, University of Vale do Paraíba, São José dos Campos, SP, Brazil
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Gholami L, Asefi S, Hooshyarfard A, Sculean A, Romanos GE, Aoki A, Fekrazad R. Photobiomodulation in Periodontology and Implant Dentistry: Part 2. PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY 2019; 37:766-783. [PMID: 31765274 DOI: 10.1089/photob.2019.4731] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
(Part 1 of this article can be located at www.liebertpub.com/doi/10.1089/photob.2019.4710.) Objective: Finding evidence-based treatment strategies for low-level light therapy and the correct incorporation of these treatment methods in the clinical practice of periodontics. Background: Photobiomodulation has been shown to have biostimulatory, anti-inflammatory, and analgesic effects that can be beneficial in periodontal and dental implant treatment procedures. Methods: In this review, we have addressed some clinical questions regarding the potential clinical application of low-level light irradiation and its photobobiomodulatory effects in periodontology and implantology. The literature was searched for in vivo (animal or clinical) articles written in English in four electronic databases of PubMed, Scopus, Google Scholar, and Cochrane Library until April 2019. Only studies with low irradiation doses without any thermal effects used only for their photobiomodulatory purposes were included. Results: We were able to find relevant studies for all of our questions, and positive effects for the application of light therapy were reported in most of the studies. However, there is still a great deal of heterogeneity in terms of study designs and most importantly in light irradiation devices and the parameters used. Due to this issue, it was not possible to reach specific evidence-based irradiation protocols for the questions addressed in this review. Conclusions: Based on our search results, an obvious positive effect of low-level light therapy on stimulation of healing of periodontal soft and hard tissues and reduction of inflammation can be seen. Future well-designed randomized control studies with the same irradiation settings and systematic reviews evaluating the studies found on the questions mentioned are necessary to reach evidence-based recommendations.
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Affiliation(s)
- Leila Gholami
- Dental Implants Research Center, Department of Periodontology, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Sohrab Asefi
- Department of Orthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Amirarsalan Hooshyarfard
- Dental Implants Research Center, Department of Periodontology, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Anton Sculean
- Department of Periodontology, School of Dentistry, University of Bern, Bern, Switzerland
| | - Georgios E Romanos
- Department of Periodontology, School of Dental Medicine, Stony Brook University, Stony Brook, New York
| | - Akira Aoki
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - 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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Escudero JSB, Perez MGB, de Oliveira Rosso MP, Buchaim DV, Pomini KT, Campos LMG, Audi M, Buchaim RL. Photobiomodulation therapy (PBMT) in bone repair: A systematic review. Injury 2019; 50:1853-1867. [PMID: 31585673 DOI: 10.1016/j.injury.2019.09.031] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 01/16/2019] [Accepted: 09/20/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND Photobiomodulation therapy (PBMT) using low-level laser influences the release of several growth factors involved in the formation of epithelial cells, fibroblasts, collagen and vascular proliferation, besides accelerating the synthesis of bone matrix due to the increased vascularization and lower inflammatory response, with significant increase of osteocytes in the irradiated bone. Considering its properties, beneficial effects and clinical relevance, the aim of this review was to analyze the scientific literature regarding the use of PBMT in the process of bone defect repair. METHODS Electronic search was carried out in PubMed/MEDLINEⓇ and Web of Science databases with combination of the descriptors low-level laser therapy AND bone repair, considering the period of publication until the year 2018. RESULTS The literature search identified 254 references in PubMed/MEDLINE and 204 in Web of Science, of which 33 and 4 were selected, respectively, in accordance with the eligibility requirements. The analysis of researches showed articles using PBMT in several places of experimentation in the subjects, different types of associated biomaterials, stimulatory effects on cell proliferation, besides variations in the parameters of use of laser therapy, mainly in relation to the wavelength and density of energy. Only four articles reported that the laser did not improve the osteogenic properties of a biomaterial. CONCLUSIONS Many studies have shown that PBMT has positive photobiostimulatory effects on bone regeneration, accelerating its process regardless of parameters and the use of biomaterials. However, standardization of its use is still imperfect and should be better studied to allow correct application concerning the utilization protocols.
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Affiliation(s)
- Jose Stalin Bayas Escudero
- Department of Biological Sciences (Anatomy), Bauru School of Dentistry, University of São Paulo (USP), Bauru, SP, Brazil
| | - Maria Gabriela Benitez Perez
- Department of Biological Sciences (Anatomy), Bauru School of Dentistry, University of São Paulo (USP), Bauru, SP, Brazil
| | | | - Daniela Vieira Buchaim
- Department of Biological Sciences (Anatomy), Bauru School of Dentistry, University of São Paulo (USP), Bauru, SP, Brazil; Medical School, Discipline of Human Morphophysiology, University of Marilia (UNIMAR), Marília, SP, Brazil; Medical School, Discipline of Neuroanatomy, University Center of Adamantina (UNIFAI), Adamantina, SP, Brazil
| | - Karina Torres Pomini
- Department of Biological Sciences (Anatomy), Bauru School of Dentistry, University of São Paulo (USP), Bauru, SP, Brazil
| | | | - Mauro Audi
- Physiotherapy School, University of Marilia (UNIMAR), Marília-SP, Brazil
| | - Rogério Leone Buchaim
- Department of Biological Sciences (Anatomy), Bauru School of Dentistry, University of São Paulo (USP), Bauru, SP, Brazil; Medical School, Discipline of Human Morphophysiology, University of Marilia (UNIMAR), Marília, SP, Brazil.
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Arakeeb MAA, Zaky AA, Harhash TAH, Salem WS, El-Mofty M. Effect of Combined Application of Growth Factors and Diode Laser Bio-Stimulation on the Osseo Integration of Dental Implants. Open Access Maced J Med Sci 2019; 7:2520-2527. [PMID: 31666858 PMCID: PMC6814472 DOI: 10.3889/oamjms.2019.672] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/07/2019] [Accepted: 07/09/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND: The success of implants is associated first with their osseointegration, and later on with their survival rate. In recent years, many efforts have been exerted to develop implant design, geometry, materials and techniques to enhance the osseointegration process and also to increase the success rate of implant procedures. New techniques, like leukocyte and platelet-rich fibrin (L-PRF) and low-level laser treatment (LLLT), have been developed to enhance the osseointegration around dental implants. AIM: This study aims at accelerating bone osseointegration process around dental implant using new techniques to increase the success rate, to allow immediate or early loading of a dental implant, and to make a comparison between the various new techniques in dental implant procedures to figure out which technique will achieve the best results. METHODS: The study was conducted on a random sample of 40 male patients. Dental implants were placed in the posterior areas of the lower jaw. Patients were divided randomly into 4 groups; control group, LLLT group, L-PRF group and L-PRF plus LLLT group. They were assessed using cone-beam computed tomography (CBCT). RESULTS: The results showed significant differences between all groups over different measured times. All the groups showed improvement in comparison with Normal group, where L-PRF group showed the best result followed by (L-PRF+LLLT) group, while the LLLT group showed the least improvement in comparison with bothL-PRF group and (L-PRF+LLLT) group. CONCLUSION: The study demonstrates that L-PRF gives a better performance in the osseointegration around dental implants than LLLT.
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Affiliation(s)
| | - Ahmed Abbas Zaky
- Department of Medical Applications of Laser, NILES, Cairo University, Cairo, Egypt
| | | | - Walid S Salem
- Oral and Maxillofacial Radiology Department, College of Dentistry, Beni Suef University, Egypt, Beni Suef, Egypt
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Systemic and local effects of radiotherapy: an experimental study on implants placed in rats. Clin Oral Investig 2019; 24:785-797. [PMID: 31154539 DOI: 10.1007/s00784-019-02946-5] [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: 12/15/2018] [Accepted: 05/03/2019] [Indexed: 12/28/2022]
Abstract
OBJECTIVES Evaluate the modulating effect of ionizing radiation, blood cytokine levels, and bone remodeling of the interface around the implant to understand the radiation mechanisms which can impair the implants receptor site. MATERIAL AND METHODS Sixty rats were submitted to grade V titanium implants in the femurs and were divided into the following groups: no-irradiation (N-Ir): control group with implant only; early-irradiation (E-Ir): implant + irradiation after 24 h; late-irradiation (L-Ir): implant + irradiation after 4 weeks; and previous-irradiation (P-Ir): irradiation + implant after 4 weeks. The animals in the E-Ir, L-Ir, and P-Ir groups were irradiated in two fractional stages of 15 Gy. At 3 days, 2 weeks, and 7 weeks after the final procedure, five animals were randomly euthanized per group. Serum levels of TNF-ɑ, IL-1β, TGF-β, IL-6, M-CSF, and IL-10 were measured from blood collected prior to euthanasia using the ELISA test. The pieces containing the implants were subjected to immunohistochemical labeling using the tartrate acid resistant to phosphatase, osteocalcin, and caspase-3 markers and mCT. The ANOVA test was used for statistical analysis, and the Tukey multiple comparison test (p < 0.05) was applied. RESULTS The results indicated that ionizing radiation modifies the production of pro- and anti-inflammatory serum cytokines, the expression of proteins involved in bone remodeling and cellular apoptosis, as well as changes in bone formation. CONCLUSIONS The results suggests that a longer period between radiotherapy and implant placement surgery when irradiation occurs prior to implant installation would allow the recovery and renewal of bone cells and avoid future failures in osseointegration. CLINICAL RELEVANCE The search for modifications caused by ionizing irradiation in bone tissue can indicate the ideal period for implant placement without affecting the osseointegration process.
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Scalize PH, de Sousa LG, Gonçalves LMN, Pitol DL, Palinkas M, Coppi AA, Righeti MA, Ricardo V, Bombonato‐Prado KF, Regalo SCH, Siessere S. Low-level laser therapy enhances the number of osteocytes in calvaria bone defects of ovariectomized rats. Animal Model Exp Med 2019; 2:51-57. [PMID: 31016287 PMCID: PMC6431244 DOI: 10.1002/ame2.12056] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/18/2018] [Accepted: 01/09/2019] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Osteoporosis can make bone repair difficult. Low-level laser therapy (LLLT) has been shown to be a promising tool for bone neoformation. This study aimed to analyze the effect of LLLT on calvaria bone defects of ovariectomized rats using stereology. METHODS Fifty-four Wistar rats were subjected to bilateral ovariectomy, and bone defects were created in calvaria after 150 days. The animals were divided into nine groups (n = 6 per group), and 24 hours after the bone defects were created they received 3, 6 or 12 sessions of LLLT at 0, 20 or 30 J/cm2, using a 780-nm low-intensity GaAlAs laser. One-way ANOVA followed by Tukey's post hoc test was used for data processing. A difference of P < 0.05 was considered statistically significant. The parameters evaluated were osteocyte density (Nv ost), total osteocyte number (Nto ost), trabecular surface density (Sv t), and trabecular surface area (Sa t). RESULTS Data obtained showed that Nto ost, Sv t, and Sa t in group G2 rats were significantly different from G1 (0 J/cm2) (P < 0.05). Compared to group G4, G5 presented higher values for the parameters Sv t and Sa t, and G6 presented significantly higher values for almost all the analyzed parameters (Nv ost, Nto ost, Sv t, and Sa t) (P < 0.05). Compared to group G7, G8 showed a higher value only for the parameter Sa t, and G9 showed significantly higher values for parameters Nv ost, Nto ost, Sv t, and Sa t. CONCLUSION We conclude that LLLT stimulated bone neoformation and contributed to an increase in the total number of osteocytes, especially with a laser energy density of 30 J/cm2 given for 6 and 12 sessions.
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Affiliation(s)
- Priscilla Hakime Scalize
- Department of Morphology, Physiology and Basic PathologySchool of Dentistry of Ribeirão PretoUSP ‐ University of São PauloRibeirão PretoSPBrazil
| | - Luiz Gustavo de Sousa
- Department of Morphology, Physiology and Basic PathologySchool of Dentistry of Ribeirão PretoUSP ‐ University of São PauloRibeirão PretoSPBrazil
| | - Lígia Maria Napolitano Gonçalves
- Department of Morphology, Physiology and Basic PathologySchool of Dentistry of Ribeirão PretoUSP ‐ University of São PauloRibeirão PretoSPBrazil
| | - Dimitrius Leonardo Pitol
- Department of Morphology, Physiology and Basic PathologySchool of Dentistry of Ribeirão PretoUSP ‐ University of São PauloRibeirão PretoSPBrazil
| | - Marcelo Palinkas
- Department of Morphology, Physiology and Basic PathologySchool of Dentistry of Ribeirão PretoUSP ‐ University of São PauloRibeirão PretoSPBrazil
| | - Antônio Augusto Coppi
- Faculty of Health and Medical SciencesSchool of Veterinary MedicineUniversity of SurreyGuildfordSurreyUK
| | - Mariah Acioli Righeti
- Department of Morphology, Physiology and Basic PathologySchool of Dentistry of Ribeirão PretoUSP ‐ University of São PauloRibeirão PretoSPBrazil
| | - Vitória Ricardo
- Department of Morphology, Physiology and Basic PathologySchool of Dentistry of Ribeirão PretoUSP ‐ University of São PauloRibeirão PretoSPBrazil
| | - Karina Fittipaldi Bombonato‐Prado
- Department of Morphology, Physiology and Basic PathologySchool of Dentistry of Ribeirão PretoUSP ‐ University of São PauloRibeirão PretoSPBrazil
| | - Simone Cecílio Hallak Regalo
- Department of Morphology, Physiology and Basic PathologySchool of Dentistry of Ribeirão PretoUSP ‐ University of São PauloRibeirão PretoSPBrazil
| | - Selma Siessere
- Department of Morphology, Physiology and Basic PathologySchool of Dentistry of Ribeirão PretoUSP ‐ University of São PauloRibeirão PretoSPBrazil
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CaP Coating and Low-Level Laser Therapy to Stimulate Early Bone Formation and Improve Fixation of Rough Threaded Implants. IMPLANT DENT 2018; 27:660-666. [DOI: 10.1097/id.0000000000000824] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Mikhail FF, El-Din M, Ibrahim T, Zekry K, Nemat A, Nasry S. Effect of Laser Therapy on the Osseointegration of Immediately Loaded Dental Implants in Patients under Vitamin C, Omega-3 and Calcium Therapy. Open Access Maced J Med Sci 2018; 6:1468-1474. [PMID: 30159079 PMCID: PMC6108810 DOI: 10.3889/oamjms.2018.291] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/24/2018] [Accepted: 07/03/2018] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND: The use of laser therapy in the biostimulation of bone repair has been growing steadily. AIM: This study aimed to evaluate the radio-densitometric effect of low-intensity laser therapy on the osseointegration of immediately loaded dental implants in patients under vitamin C, omega-3 and calcium therapy. PATIENTS AND METHODS: A single implant was placed in the mandibular first molar region of twenty patients which were equally divided into two groups. In the non-laser group, the healing phase was left to progress spontaneously without any intervention, while in the laser group it was augmented with low-level laser therapy of wavelength 904 nm in contact mode, continuous wave, 20 mW output power and exposure time 30 sec with a dose 4.7 J/cm2. Patients in both groups were given vitamin C, calcium and omega-3 starting one month preoperatively. Postoperative digital panoramas were taken immediately after surgery, 1.5 months and 6 months postoperatively. Changes in bone density along the bone-implant interface at the mesial, distal and apical sides were assessed using the Digora software. RESULTS: Independent student t-test was used to compare means of variables between the laser and the non-laser group while repeated measures ANOVA was used to compare bone densities at different times for the same group. Significant increased differences were observed at the mesial, distal and apical sides surrounding the implants of both groups per time. However, the rate of increase was significantly higher in the laser group. The mean difference at the mesial side after 6 months was 21.99 ± 5.48 in the laser group and 14.21 ± 4.95 in the non-laser group, while it read 21.74 ± 3.56 in the laser group and 10.78 ± 3.90 in non-laser group at the distal side and was 18.90 ± 5.91 in the laser group and 10.39 ± 3.49 in non-laser group at the apical side. Significance was recorded at P = 0.004, P = 0.0001, and 0.001 at the mesial, distal and apical sides respectively. CONCLUSION: The low-intensity laser irradiation significantly promoted bone healing and speeded up the osseointegration process emphasising the laser’s biostimulatory effect.
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Affiliation(s)
- Faten Fawzy Mikhail
- Department of Surgery and Oral Medicine, National Research Centre, Cairo, Egypt
| | - Mouchira El-Din
- Periodontology and Oral Radiology, Department of Oral Medicine, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
| | - Tarek Ibrahim
- Department of Medical Laser Application, National Institute of Laser Enhanced Sciences, Cairo University, Cairo, Egypt
| | - Khaled Zekry
- Periodontology and Oral Radiology, Department of Oral Medicine, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
| | - Amany Nemat
- Department of Surgery and Oral Medicine, National Research Centre, Cairo, Egypt
| | - Sherine Nasry
- Department of Surgery and Oral Medicine, National Research Centre, Cairo, Egypt
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Abohabib AM, Fayed MM, Labib AH. Effects of low-intensity laser therapy on the stability of orthodontic mini-implants: a randomised controlled clinical trial. J Orthod 2018; 45:149-156. [PMID: 29874972 DOI: 10.1080/14653125.2018.1481710] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
OBJECTIVE To investigate the effect of low-intensity laser therapy on mini-implant stability using resonance frequency analysis during canine retraction with fixed appliances. DESIGN A split-mouth randomised clinical trial. SETTING Subjects were recruited and treated in the outpatient clinic, Department of Orthodontics, Faculty of Dentistry, Cairo University. PARTICIPANTS Fifteen subjects with mean age 20.9 (±3.4) years who required extraction of maxillary first premolar teeth and mini-implant-supported canine retraction. METHODS Thirty orthodontic mini-implants were inserted bilaterally in the maxillary arches of recruited subjects following alignment and levelling. Mini-implants were immediately loaded with a force of 150 g using nickel titanium coil springs with split-mouth randomisation to a low-intensity laser-treated side and control side. The experimental sides were exposed to low-intensity laser therapy from a diode laser with a wavelength of 940 nm at (0, 7, 14, 21 days) after mini-implant placement. Mini-implant stability was measured using resonance frequency analysis at (0, 1, 2, 3, 4, 6, 8, 10 weeks) after implant placement. RESULTS A total sample of 28 mini-implants were investigated with 14 in each group. Clinically, both mini-implant groups had the same overall success rate of 78.5%. There were no significant differences in resonance frequency scores between low-intensity laser and control sides from baseline to week 2. However, from week 3 to 10, the low-intensity laser sides showed significantly increased mean resonance frequency values compared to control (P > 0.05). CONCLUSIONS Despite evidence of some significant differences in resonance frequency between mini-implants exposed to low-intensity laser light over a 10 weeks period there were no differences in mini-implant stability. Low-intensity laser light cannot be recommended as a clinically useful adjunct to promoting mini-implant stability during canine retraction.
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Affiliation(s)
| | - Mona Mohamed Fayed
- b Department of Orthodontics, Faculty of Dentistry , Cairo University , Cairo , Egypt.,c Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry , University of Malaya , Kuala Lumpur , Malaysia
| | - Amr H Labib
- b Department of Orthodontics, Faculty of Dentistry , Cairo University , Cairo , Egypt
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Atasoy KT, Korkmaz YT, Odaci E, Hanci H. The efficacy of low-level 940 nm laser therapy with different energy intensities on bone healing. Braz Oral Res 2017; 31:e7. [PMID: 28076498 DOI: 10.1590/1807-3107bor-2017.vol31.0007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 11/01/2016] [Indexed: 12/14/2022] Open
Abstract
The aim of this study was to evaluate the efficacy of low-level 940 nm laser therapy with energy intensities of 5, 10 and 20 J/cm2 on bone healing in an animal model. A total of 48 female adult Wistar rats underwent surgery to create bone defects in the right tibias. Low-level laser therapy (LLLT) was applied immediately after surgery and on post-operative days 2, 4, 6, 8, 10 and 12 in three study groups with energy intensities of 5 J/cm2, 10 J/cm2 and 20 J/cm2 using a 940 nm Gallium-Aluminium-Arsenide (Ga-Al-As) laser, while one control group underwent only the tibia defect surgery. All animals were sacrificed 4 or 8 weeks post-surgery. Fibroblasts, osteoblasts, osteocytes, osteoclasts and newly formed vessels were evaluated by a histological examination. No significant change was observed in the number of osteocytes, osteoblasts, osteoclasts and newly formed vessels at either time period across all laser groups. Although LLLT with the 10 J/cm2 energy density increased fibroblast activity at the 4th week in comparison with the 5 and 20 J/cm2 groups, no significant change was observed between the laser groups and the control group. These results indicate that low-level 940 nm laser with different energy intensities may not have marked effects on the bone healing process in both phases of bone formation.
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Affiliation(s)
- Kerem Turgut Atasoy
- Karadeniz Technical University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Trabzon, Turkey
| | - Yavuz Tolga Korkmaz
- Karadeniz Technical University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Trabzon, Turkey
| | - Ersan Odaci
- Karadeniz Technical University, Faculty of Medicine, Department of Histology and Embriology, Trabzon, Turkey
| | - Hatice Hanci
- Karadeniz Technical University, Faculty of Medicine, Department of Histology and Embriology, Trabzon, Turkey
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Borzabadi-Farahani A. Effect of low-level laser irradiation on proliferation of human dental mesenchymal stem cells; a systemic review. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2016; 162:577-582. [PMID: 27475781 DOI: 10.1016/j.jphotobiol.2016.07.022] [Citation(s) in RCA: 297] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 07/18/2016] [Indexed: 10/21/2022]
Abstract
CONTEXT Identification of factors that enhance the proliferation of human dental mesenchymal stem cells (DMSCs) is vital to facilitate tissue regeneration. The role of low-level laser irradiation (LLLI) on proliferation of human DMSCs has not been well established. OBJECTIVE To assess the effect of LLLI on proliferation of human DMSCs when applied in-vitro. DATA SOURCES Electronic search of literature was conducted (2000-2016) on PubMed, Web of Science, and Scopus databases. Search terms included low-level light therapy, low-level laser irradiation, low-level light irradiation, LLLT, humans, adolescent, adult, cells, cultured, periodontal ligament, dental pulp, stem cells, dental pulp stem cells, mesenchymal stem cells, periodontal ligament stem cell, deciduous teeth, cell proliferation, adult stem cells, radiation, and proliferation. RESULTS The literature search identified 165 studies with 6 being eligible for inclusion; all used diode lasers; 5 studies used InGaAIP diode lasers; 4 used 660nm, and the other two applied 810nm or 980nm wavelength LLLI. The distance between the DMSCs and the laser spot ranged between 0.5mm to 2mm. The time intervals of cell proliferation analysis ranged from 0h to 7days after LLLI. After 660nm LLLI, an increase in the DMSC's proliferation was reported [DMSCs extracted from dental pulp of deciduous teeth (two irradiations, 3J/cm(2), 20mW was more effective than 40mW), adult teeth (two irradiations, 0.5 and 1.0J/cm(2), 30mW), and from adult periodontal ligament (two irradiations, 1.0J/cm(2) was more effective than 0.5J/cm(2), 30mW)]. Similarly, an increase in the proliferation of DMSCs extracted from dental pulp of adult teeth was reported after 810nm LLLI (7 irradiations in 7days, 0.1 and 0.2J/cm(2), 60mW) or 980nm LLLI (single irradiation, 3J/cm(2), 100mW). However, 660nm LLLI in one study did not increase the proliferation of DMSCs (single irradiation, energy densities of 0.05, 0.30, 7, and 42J/cm(2), 28mW). CONCLUSION There is limited evidence that in-vitro LLLI (660/810/980nm, with energy densities of 0.1-3J/cm(2)) increases the proliferation of DMSCs. Considering the limited evidence and their method heterogeneity it is difficult to reach a firm conclusion. Further research is necessary to identify the optimal characteristics of the LLLI setting (wave length, energy density, power output, frequency/duration of irradiations, distance between the cells and the laser spot/probe) to increase proliferation of DMSCs, and assess its impact on replicative senescence, as well as determine feasibility of the use in the clinical setting.
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Affiliation(s)
- Ali Borzabadi-Farahani
- Orthodontics, Department of Clinical Sciences and Translational Medicine, Univeristy of Rome Tor Vergata, Rome, Italy; Warwick Medical School, University of Warwick, Coventry, and Specialist Orthodontic Practice, London, United Kingdom.
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Peri-implant osseointegration after low-level laser therapy: micro-computed tomography and resonance frequency analysis in an animal model. Lasers Med Sci 2016; 31:1789-1795. [PMID: 27534769 DOI: 10.1007/s10103-016-2051-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 08/09/2016] [Indexed: 10/21/2022]
Abstract
The purpose of the present study is to evaluate the effects of low-level laser therapy on the osseointegration process by comparing resonance frequency analysis measurements performed at implant placement and after 30 days and micro-computed tomography images in irradiated vs nonirradiated rabbits. Fourteen male New Zealand rabbits were randomly divided into two groups of seven animals each, one control group (nonirradiated animals) and one experimental group that received low-level laser therapy (Thera Lase®, aluminum-gallium-arsenide laser diode, 10 J per spot, two spots per session, seven sessions, 830 nm, 50 mW, CW, Ø 0.0028 cm2). The mandibular left incisor was surgically extracted in all animals, and one osseointegrated implant was placed immediately afterward (3.25ø × 11.5 mm; NanoTite, BIOMET 3i). Resonance frequency analysis was performed with the Osstell® device at implant placement and at 30 days (immediately before euthanasia). Micro-computed tomography analyses were then conducted using a high-resolution scanner (SkyScan 1172 X-ray Micro-CT) to evaluate the amount of newly formed bone around the implants. Irradiated animals showed significantly higher implant stability quotients at 30 days (64.286 ± 1.596; 95 % confidence interval (CI) 60.808-67.764) than controls (56.357 ± 1.596; 95 %CI 52.879-59.835) (P = .000). The percentage of newly formed bone around the implants was also significantly higher in irradiated animals (75.523 ± 8.510; 95 %CI 61.893-89.155) than in controls (55.012 ± 19.840; 95 %CI 41.380-68.643) (P = .027). Laser therapy, based on the irradiation protocol used in this study, was able to provide greater implant stability and increase the volume of peri-implant newly formed bone, indicating that laser irradiation effected an improvement in the osseointegration process.
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de Vasconcellos LMR, Barbara MAM, Rovai EDS, de Oliveira França M, Ebrahim ZF, de Vasconcellos LGO, Porto CD, Cairo CAA. Titanium scaffold osteogenesis in healthy and osteoporotic rats is improved by the use of low-level laser therapy (GaAlAs). Lasers Med Sci 2016; 31:899-905. [PMID: 27056701 DOI: 10.1007/s10103-016-1930-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 03/23/2016] [Indexed: 11/25/2022]
Abstract
The present study aimed to assess the effects of low-level laser therapy (GaAlAs) on the bone repair process within titanium scaffolds in the femurs of healthy and osteoporotic rats. Fifty-six rats were divided into four groups: group Sh: SHAM animals that received scaffolds; group LSh: SHAM animals that received scaffolds and were subjected to laser therapy; group OV: ovarietomized (OVX) animals that received scaffolds; and group LOV: OVX animals that received scaffolds and were subjected to laser therapy. Thirty days following ovariectomy or sham surgery, scaffolds were implanted in the left femurs of all animals in the study. Immediately after opening the surgical site, the inner part of the surgical cavity was stimulated with low-level laser (GaAlAs). In addition to this procedure, the laser group was also subjected to sessions of low-level laser therapy (LLLT) at 48-h intervals, with the first session performed immediately after surgery. The rats were sacrificed at 2 and 6 weeks, time in which femur fragments were submitted for histological and histomorphometric examination, and skin tissue above the scaffold was submitted to histological analysis. At the end of the study, greater bone formation was observed in the animals submitted to LLLT. At 2 and 6 weeks, statistically significant differences were observed between LSh and Sh groups (p = 0.009 and 0.0001) and LOV and OV (p = 0.0001 and 0.0001), respectively. No statistical difference was observed when assessing the estrogen variable. On the basis of our methodology and results, we conclude that LLLT improves and accelerates bone repair within titanium scaffolds in both ovariectomized and healthy rats, when compared to animals not subjected to radiation.
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Affiliation(s)
- Luana Marotta Reis de Vasconcellos
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Univ Estadual Paulista (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos, SP, Brazil, CEP 12245-000.
| | - Mary Anne Moreira Barbara
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Univ Estadual Paulista (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos, SP, Brazil, CEP 12245-000
| | - Emanuel da Silva Rovai
- Department of Stomatology, Division of Periodontics, School of Dentistry, University of São Paulo, USP, Av. Lineu Prestes, 2227, São Paulo, SP, Brazil, CEP 05508-000
| | - Mariana de Oliveira França
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Univ Estadual Paulista (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos, SP, Brazil, CEP 12245-000
| | - Zahra Fernandes Ebrahim
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Univ Estadual Paulista (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos, SP, Brazil, CEP 12245-000
| | - Luis Gustavo Oliveira de Vasconcellos
- Department of Prosthodontics and Dental Materials, Institute of Science and Technology, Univ Estadual Paulista (UNESP), Av. Eng. Francisco José Longo, 777, São José dos Campos, SP, Brazil, CEP 12245-000
| | - Camila Deco Porto
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, Univ Estadual Paulista (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos, SP, Brazil, CEP 12245-000
| | - Carlos Alberto Alves Cairo
- Division of Materials, Air and Space Institute, CTA, Praça Mal. do Ar Eduardo Gomes 14, São José dos Campos, 12904-000, SP, Brazil
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Micro-computed tomography and histomorphometric analysis of human alveolar bone repair induced by laser phototherapy: a pilot study. Int J Oral Maxillofac Surg 2015; 44:1521-8. [DOI: 10.1016/j.ijom.2015.08.989] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 06/30/2015] [Accepted: 08/24/2015] [Indexed: 12/14/2022]
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do Prado RF, Rabêlo SB, de Andrade DP, Nascimento RD, Henriques VAR, Carvalho YR, Cairo CAA, de Vasconcellos LMR. Porous titanium and Ti-35Nb alloy: effects on gene expression of osteoblastic cells derived from human alveolar bone. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:259. [PMID: 26449449 DOI: 10.1007/s10856-015-5594-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 09/26/2015] [Indexed: 06/05/2023]
Abstract
Tests on titanium alloys that possess low elastic modulus, corrosion resistance and minimal potential toxicity are ongoing. This study aimed to evaluate the behavior of human osteoblastic cells cultured on dense and porous Titanium (Ti) samples comparing to dense and porous Ti-35 Niobium (Ti-35Nb) samples, using gene expression analysis. Scanning electronic microscopy confirmed surface porosity and pore interconnectivity and X-ray diffraction showed titanium beta-phase stabilization in Ti-35Nb alloy. There were no differences in expression of transforming growth factor-β, integrin-β1, alkaline phosphatase, osteopontin, macrophage colony stimulating factor, prostaglandin E synthase, and apolipoprotein E regarding the type of alloy, porosity and experimental period. The experimental period was a significant factor for the markers: bone sialoprotein II and interleukin 6, with expression increasing over time. Porosity diminished Runt-related transcription factor-2 (Runx-2) expression. Cells adhering to the Ti-35Nb alloy showed statistically similar expression to those adhering to commercially pure Ti grade II, for all the markers tested. In conclusion, the molecular mechanisms of interaction between human osteoblasts and the Ti-35Nb alloy follow the principal routes of osseointegration of commercially pure Ti grade II. Porosity impaired the route of transcription factor Runx-2.
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Affiliation(s)
- Renata Falchete do Prado
- Institute of Science and Technology, São Paulo State University, Av. Engenheiro Francisco José Longo, 777, São José dos Campos, São Paulo, 12245-000, Brazil.
| | - Sylvia Bicalho Rabêlo
- Institute of Science and Technology, São Paulo State University, Av. Engenheiro Francisco José Longo, 777, São José dos Campos, São Paulo, 12245-000, Brazil
| | - Dennia Perez de Andrade
- Institute of Science and Technology, São Paulo State University, Av. Engenheiro Francisco José Longo, 777, São José dos Campos, São Paulo, 12245-000, Brazil
| | - Rodrigo Dias Nascimento
- Institute of Science and Technology, São Paulo State University, Av. Engenheiro Francisco José Longo, 777, São José dos Campos, São Paulo, 12245-000, Brazil
| | - Vinicius André Rodrigues Henriques
- Material Division, Air and Space Institute, General Command of Aerospace Technology, São José dos Campos, Praça Mal. do Ar Eduardo Gomes, 14, São José dos Campos, São Paulo, 12904-000, Brazil
| | - Yasmin Rodarte Carvalho
- Institute of Science and Technology, São Paulo State University, Av. Engenheiro Francisco José Longo, 777, São José dos Campos, São Paulo, 12245-000, Brazil
| | - Carlos Alberto Alves Cairo
- Material Division, Air and Space Institute, General Command of Aerospace Technology, São José dos Campos, Praça Mal. do Ar Eduardo Gomes, 14, São José dos Campos, São Paulo, 12904-000, Brazil
| | - Luana Marotta Reis de Vasconcellos
- Institute of Science and Technology, São Paulo State University, Av. Engenheiro Francisco José Longo, 777, São José dos Campos, São Paulo, 12245-000, Brazil
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26
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de Andrade DP, de Vasconcellos LMR, Carvalho ICS, Forte LFDBP, de Souza Santos EL, Prado RFD, Santos DRD, Cairo CAA, Carvalho YR. Titanium-35niobium alloy as a potential material for biomedical implants: In vitro study. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:538-44. [PMID: 26249625 DOI: 10.1016/j.msec.2015.07.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 07/03/2015] [Accepted: 07/11/2015] [Indexed: 01/17/2023]
Abstract
Research on new titanium alloys and different surface topographies aims to improve osseointegration. The objective of this study is to analyze the behavior of osteogenic cells cultivated on porous and dense samples of titanium-niobium alloys, and to compare them with the behavior of such type of cells on commercial pure titanium. Samples prepared using powder metallurgy were characterized using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and metallographic and profilometer analyses. Osteogenic cells from newborn rat calvaria were plated over different groups: dense or porous samples composed of Ti or Ti-35niobium (Nb). Cell adhesion, cell proliferation, MTT assay, cell morphology, protein total content, alkaline phosphatase activity, and mineralization nodules were assessed. Results from XRD and EDS analysis confirmed the presence of Ti and Nb in the test alloy. Metallographic analysis revealed interconnected pores, with pore size ranging from 138 to 150μm. The profilometer analysis detected the greatest rugosity within the dense alloy samples. In vitro tests revealed similar biocompatibility between Ti-35Nb and Ti; furthermore, it was possible to verify that the association of porous surface topography and the Ti-35Nb alloy positively influenced mineralized matrix formation. We propose that the Ti-35Nb alloy with porous topography constitutes a biocompatible material with great potential for use in biomedical implants.
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Affiliation(s)
- Dennia Perez de Andrade
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, UNESP - Univ Estadual Paulista, State University of São Paulo (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos 12245-000, SP, Brazil
| | - Luana Marotta Reis de Vasconcellos
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, UNESP - Univ Estadual Paulista, State University of São Paulo (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos 12245-000, SP, Brazil
| | - Isabel Chaves Silva Carvalho
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, UNESP - Univ Estadual Paulista, State University of São Paulo (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos 12245-000, SP, Brazil
| | - Lilibeth Ferraz de Brito Penna Forte
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, UNESP - Univ Estadual Paulista, State University of São Paulo (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos 12245-000, SP, Brazil
| | - Evelyn Luzia de Souza Santos
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, UNESP - Univ Estadual Paulista, State University of São Paulo (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos 12245-000, SP, Brazil
| | - Renata Falchete do Prado
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, UNESP - Univ Estadual Paulista, State University of São Paulo (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos 12245-000, SP, Brazil.
| | - Dalcy Roberto Dos Santos
- Division of Materials, Air and Space Institute, CTA, Praça Mal. do Ar Eduardo Gomes, 14, São José dos Campos 12904-000, SP, Brazil
| | - Carlos Alberto Alves Cairo
- Division of Materials, Air and Space Institute, CTA, Praça Mal. do Ar Eduardo Gomes, 14, São José dos Campos 12904-000, SP, Brazil
| | - Yasmin Rodarte Carvalho
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, UNESP - Univ Estadual Paulista, State University of São Paulo (UNESP), Av. Engenheiro Francisco José Longo, 777, São José dos Campos 12245-000, SP, Brazil
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