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Xailani KK, Hamad SA. Effect of photobiomodulation therapy of overprepared dental implant bed on torque removal and implant stability quotient: an experimental study in sheep. Minerva Dent Oral Sci 2024; 73:96-101. [PMID: 37326505 DOI: 10.23736/s2724-6329.23.04788-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
BACKGROUND Primary stability of dental implant is an important prerequisite for achieving osseointegration. This study was conducted to evaluate the effects of photobiomodulation therapy on bone formation-around implants by measuring the implant removal torque and implant stability quotient. METHODS This study was conducted in six adult male sheep. Four implants were placed on each side of the lower border of the mandible. The implant beds were prepared to a size of 10 mm in length and 4.8 mm in width, to receive an implant of 8 mm in length and 4 mm in width. Laser application to the socket was performed just before implant placement, and was immediately administered to the surface of the implant and the peri-implant bone before suturing of the wound. The therapy was continued twice daily for the next seven consecutive days. The animals were sacrificed at 4, 8, and 12 weeks, with two animals per time point. The implant-removal torque was determined with an electronic wrench, and the implant stability quotient (ISQ) was assessed with an Ostell device. RESULTS The laser treated sides showed significantly higher removal torque and ISQ, at the three-time points (P<0.05). At 4 weeks, the ISQ was 61.44 (±10.4) in the laser group and 48.2 (±16.7) in the control group. At 8 weeks, the ISQ increased to 62.2 (±5.5) in the laser group and 56.1 (±4.3) in the control group. At 12 weeks, the ISQ was 67 (±4.5) in the laser group and 61.875 (±6.3) in the control group. The removal torque at 4 weeks was 218.6 (±62.6) in the laser group and 147.6 (±40.9) in the control group. At 8 weeks, the removal torque increased to 370.5 (±33.3) in the laser group and 250.2 (±25.0) in the control group. At 12 weeks, the removal torque increased to 912.6 (±177.2) in the laser group and 512.1 (±122.6) in the control group. CONCLUSIONS Photobiomodulation enhances bone formation and improves implant stability in implants with overzealously prepared oversized implant beds.
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Affiliation(s)
| | - Shehab A Hamad
- Kurdistan Higher Council of Medical Specialties, Erbil, Iraq -
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Attia MS, Elewa GM, Abdelgawad N, Ismail RM, Hassan Eid M, Ghoneim MM. The Influence of Low-Level Laser Therapy on CBCT Radiographic and Biochemical Profiles of Type II Controlled Diabetic Patients After Dental Implant Insertion: A Randomized Case-Control Study. Cureus 2023; 15:e36559. [PMID: 37102010 PMCID: PMC10123229 DOI: 10.7759/cureus.36559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/22/2023] [Indexed: 04/28/2023] Open
Abstract
Background Low-level laser treatment (LLLT) was thought to increase bone quality during osseointegration when combined with dental implants. However, there is no sufficient information on its impact on dental implants in diabetics. Osteoprotegerin (OPG) has been described as a marker for bone turnover to determine implant prognosis. The current research aims to evaluate the effect of low-level laser therapy (LLLT) on bone density (BD) and osteoprotegerin levels in peri-implant crevicular fluid (PICF) in type II diabetic patients. Methods This study comprised 40 individuals with type II diabetes mellitus (T2DM). Implants were randomly placed in 20 non-lasered T2DM patients (control) and 20 lasered T2DM patients (LLLT group). At the follow-up stages, BD and OPG levels in the PICF were evaluated in both groups. Results Significant variations were shown among control and LLLT groups concerning OPG level and BD (p≤0.001). OPG was significantly decreasing with follow-up points (p≤0.001). There was a significant decrease in OPG with time in both groups with a higher decrease in the control group. Conclusion LLLT is promising in controlled T2DM patients due to its outstanding influence on BD and estimated crevicular levels of OPG. Regarding its clinical significance, LLLT significantly improved bone quality during osseointegration on dental implants in T2DM. LLLT is considered potentially important for T2DM patients during implant placement. Trial registration The study was registered on ClinicalTrial.gov under registration number NCT05279911 (registration date: March 15, 2022) (https://clinicaltrials.gov/ct2/show/NCT05279911).
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Affiliation(s)
- Mai S Attia
- Department of Oral Medicine, Periodontology, Diagnosis, and Radiology, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, EGY
- Department of Periodontology, Oral Diagnosis, and Oral Radiology, Faculty of Oral and Dental Medicine, Misr International University, Cairo, EGY
| | - Gasser M Elewa
- Department of Oral Medicine, Diagnosis, and Periodontology, Faculty of Oral and Dental Medicine, Delta University of Science and Technology, Gamasa, EGY
| | - Nora Abdelgawad
- Department of Oral Medicine, Periodontology, Diagnosis, and Radiology, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, EGY
| | - Radwa M Ismail
- Department of Oral Medicine, Periodontology, and Oral Diagnosis, Faculty of Dentistry, Misr University for Science and Technology (MUST), Cairo, EGY
| | - Mohamed Hassan Eid
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Suez Canal University, Ismailia, EGY
| | - Mohamed M Ghoneim
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Sinai University, El-Arish, EGY
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An Evaluation of the Effects of Photobiomodulation Therapy on the Peri-Implant Bone Healing of Implants with Different Surfaces: An In Vivo Study. MATERIALS 2022; 15:ma15134371. [PMID: 35806496 PMCID: PMC9267620 DOI: 10.3390/ma15134371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/10/2022] [Accepted: 06/14/2022] [Indexed: 11/21/2022]
Abstract
(1) Background: This study evaluates the effects of photobiomodulation (PBM) therapy on the peri-implant bone healing of implants with a machined surface (MS) and treated surface (TS). (2) Methods: Topographic characterization of the surfaces (scanning electron microscopy [SEM]- energy dispersive X-ray spectroscopy [EDX]) was performed before and after implant removal. Twenty rabbits were randomly divided into four groups: MS and TS groups (without PBM therapy) and LMS and LTS groups (with PBM therapy). After implant placement, the stability coefficient (ISQ) was measured. In the periods of 21 and 42 days, the ISQ was measured again, followed by biomechanical analysis. (3) Results: The surfaces of the TS implants showed topographic differences compared with MS implants. The ISQ values of the LMS were statistically significant when compared with those of the MS at 42 days (p < 0.001). The removal torque values of the LMS were statistically significant when compared with those of the MS at 21 days (p = 0.023) and 42 days (p = 0.023). For SEM, in general, the LMS, TS and LTS presented high bone tissue coverage when compared to MS. (4) Conclusions: The PBM therapy modulated the osseointegration process and was evidenced mainly on the machined surface.
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Kuzu TE, Öztürk K, Gürgan CA, Üşümez A, Yay A, Göktepe Ö. Effect of Photobiomodulation Therapy on Peri-Implant Bone Healing in Extra-Short Implants in a Rabbit Model: A Pilot Study. Photobiomodul Photomed Laser Surg 2022; 40:402-409. [PMID: 35749706 DOI: 10.1089/photob.2021.0098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Objective: To evaluate the effects of photobiomodulation therapy (PBMT) at distinct energy levels on peri-implant bone healing in extra-short implants in a experimental rabbit model. Background: The effect of PBMT on peri-implant bone healing in short implants remains unclear. This explored the effect of PBMT on extra-short implants in terms of bone-implant contact (BIC) length and rate, and implant stability quotient (ISQ). Methods: Fifteen white New Zealand rabbits were randomly divided into five groups. In all groups, extra-short implants (3.5 × 4 mm; Nucleoss T6, İzmir/Turkey) were placed in both tibias of the rabbits. PBMT was performed in four groups (group 1, 5 J/cm2; group 2, 10 J/cm2; group 3, 20 J/cm2; and group 4, 25 J/cm2); no PBMT was performed in the control group. On the 30th day, the rabbits were sacrificed and peri-implant tissue samples were obtained to determine the BIC length and BIC rate. Implant stability levels were measured by resonance frequency analysis using the Osstell penguin device and were determined as ISQ values on the 1st and 30th days of the study. Results: PBMT significantly increased the BIC length and BIC rate in groups 3 and 4 (p < 0.001). For the ISQ values, there were significant differences between the 1st and 30th day (p < 0.001). On the 30th day, the ISQ values were significantly higher in groups 3 and 4 compared with the remaining groups (p < 0.001). Conclusions: In this study, PBMT improved peri-implant bone healing through increase in BIC length, BIC rate, and ISQ parameter values in extra-short implants.
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Affiliation(s)
- Turan Emre Kuzu
- Department of Periodontology, Faculty of Dentistry, Nuh Naci Yazgan University, Kayseri, Turkey
| | - Kübra Öztürk
- Department of Oral and Maxillofacial Surgery, and Faculty of Dentistry, Nuh Naci Yazgan University, Kayseri, Turkey
| | - Cem A Gürgan
- Department of Periodontology, Faculty of Dentistry, Nuh Naci Yazgan University, Kayseri, Turkey
| | - Aslihan Üşümez
- Department of Prosthodontics, Dental Plus Dental Clinic, İstanbul, Turkey
| | - Arzu Yay
- Department of Histology and Embryology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Özge Göktepe
- Department of Histology and Embryology, Erciyes University, Kayseri, Turkey
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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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Zayed S, Noureldin M. Rehabilitation of atrophic mandible with ultrashort implants combined with photobiomodulation therapy: A split-mouth design study. SAUDI JOURNAL OF MEDICINE AND MEDICAL SCIENCES 2022; 10:198-206. [PMID: 36247059 PMCID: PMC9555047 DOI: 10.4103/sjmms.sjmms_635_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 03/07/2022] [Accepted: 06/16/2022] [Indexed: 12/03/2022] Open
Abstract
Background: Atrophic edentulous mandible is a challenging clinical condition. Studies assessing the use of ultrashort implants to support overdentures are scarce; the optimum photobiomodulation (PBM) dose for enhancing osseointegration is yet unknown. Objective: This study aimed to evaluate and compare mandibular overdentures assisted by two versus four ultrashort implants with adjunctive PBM therapy using two doses. Materials and Methods: A total of 36 implants were placed in 12 edentulous male participants and they were randomly allocated to Group I (mandibular overdentures assisted by two ultrashort implants) or Group II (by four ultrashort implants). Fully guided implant placement was performed, and then a split-mouth design was implemented. The participants received PBM by diode laser (660 nm). Dose A (3.75 J/cm2) and Dose B (7.5 J/cm2) were applied to the right and left implant (s), respectively. Implant stability, peri-implant probing depth (PIPD), and modified gingival index (MGI) were evaluated at baseline, and at 6 and 12 months after loading. Results: After 12 months, the implant stability values were significantly higher in Group II compared with Group I (P < 0.001). A significant difference was observed in between the PIPDs of both groups (Group I: 2.35 ± 0.54 mm; Group II: 1.69 ± 0.35 mm;P= 0.001). The mean MGI values were low for both groups (Group I: 0.75 ± 0.58; Group II: 0.51 ± 0.41). Conclusions: Mandibular overdentures supported by four ultrashort implants had a more favorable clinical outcome, while PBM doses A and B were comparable in all evaluated parameters. Trial Registration: ClinicalTrials.gov Identifier: NCT03540316.
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AlOtaibi NM, Dunne M, Ayoub AF, Naudi KB. A novel surgical model for the preclinical assessment of the osseointegration of dental implants: a surgical protocol and pilot study results. J Transl Med 2021; 19:276. [PMID: 34183031 PMCID: PMC8240288 DOI: 10.1186/s12967-021-02944-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 06/15/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dental implants are considered the gold standard replacement for missing natural teeth. The successful clinical performance of dental implants is due to their ability to osseointegrate with the surrounding bone. Most dental implants are manufactured from Titanium and it alloys. Titanium does however have some shortcomings so alternative materials are frequently being investigated. Effective preclinical studies are essential to transfer the innovations from the benchtop to the patients. Many preclinical studies are carried out in the extra-oral bones of small animal models to assess the osseointegration of the newly developed materials. This does not simulate the oral environment where the dental implants are subjected to several factors that influence osseointegration; therefore, they can have limited clinical value. AIM This study aimed to develop an appropriate in-vivo model for dental implant research that mimic the clinical setting. The study evaluated the applicability of the new model and investigated the impact of the surgical procedure on animal welfare. MATERIALS AND METHODS The model was developed in male New Zealand white rabbits. The implants were inserted in the extraction sockets of the secondary incisors in the maxilla. The model allows a split-mouth comparative analysis. The implants' osseointegration was assessed clinically, radiographically using micro-computed tomography (µ-CT), and histologically. A randomised, controlled split-mouth design was conducted in 6 rabbits. A total of twelve implants were inserted. In each rabbit, two implants; one experimental implant on one side, and one control implant on the other side were applied. Screw-shaped implants were used with a length of 8 mm and a diameter of 2 mm. RESULTS All the rabbits tolerated the surgical procedure well. The osseointegration was confirmed clinically, histologically and radiographically. Quantitative assessment of bone volume and mineral density was measured in the peri-implant bone tissues. The findings suggest that the new preclinical model is excellent, facilitating a comprehensive evaluation of osseointegration of dental implants in translational research pertaining to the human application. CONCLUSION The presented model proved to be safe, reproducible and required basic surgical skills to perform.
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Affiliation(s)
- Noura M AlOtaibi
- Department of Oral and Maxillofacial Surgery, Glasgow University Dental Hospital and School, 378 Sauchiehall Street, Glasgow, G23JZ, UK.,Oral and Maxillofacial Surgery, King Saud University, Riyadh, 11362, Saudi Arabia
| | - Michael Dunne
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Ashraf F Ayoub
- Department of Oral and Maxillofacial Surgery, Glasgow University Dental Hospital and School, 378 Sauchiehall Street, Glasgow, G23JZ, UK
| | - Kurt B Naudi
- Department of Oral and Maxillofacial Surgery, Glasgow University Dental Hospital and School, 378 Sauchiehall Street, Glasgow, G23JZ, UK.
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Kinalski MDA, Agostini BA, Bergoli CD, Dos Santos MBF. Influence of low-level laser therapy on implant stability in implants placed in healed sites: a randomized controlled trial. Int J Implant Dent 2021; 7:49. [PMID: 34059974 PMCID: PMC8166992 DOI: 10.1186/s40729-021-00331-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 03/19/2021] [Indexed: 12/02/2022] Open
Abstract
Background The present study aims to assess the influence of low-level laser therapy (LLLT) on stability in implants placed in healed sites. Material and methods The present study followed the SPIRIT statement and is reported according to CONSORT. Patients were randomly allocated to LLLT or control groups. LLLT consisted in the application of 808-nm GaAlA laser applied before the preparation of the implant bed and after suturing (80 seconds; 11J/cm2). Implant stability quotient (ISQ) and the distance between the implant platform to the alveolar bone crest (millimeters) were assessed at implant placement (T0) and the abutment selection phase (4–6 months, Ta). Results A total of 64 implants were placed in 33 patients. The insertion torque ranged from 10 to 70 N.cm (mean 43.23; SD ±16.82). The T0 ISQ ranged from 18 to 95.5 (mean 61.7; SD ±18.23) and the crestal bone radiographic distance was 2.03 mm (SD±1.27). At Ta, the ISQ ranged from 39 to 90 (mean 64.2; SD±9.84), and the mean crestal bone radiographic loss was 1.70mm (SD±1.65). However, no differences were observed when LLLT and control groups were compared with ISQ difference (Ta–T0; p=0.598) or radiographical peri-implant alterations (p=0.531). Conclusion LLLT did not influence the implant stability in implants placed in healed sites compared to a control group. Trial registration ReBEC, RBR-35TNJ7. Registered May 23, 2018
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Affiliation(s)
| | | | - Cesar Dalmolin Bergoli
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Rio Grande, Brazil
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Abdel Hamid MA, Zaied AA, Zayet MK, Abdelmageed H, Hassan EA, Amaroli A. Efficacy of Flat-Top Hand-Piece Using 980 nm Diode Laser Photobiomodulation on Socket Healing after Extraction: Split-Mouth Experimental Model in Dogs. Photochem Photobiol 2020; 97:627-633. [PMID: 33190304 DOI: 10.1111/php.13356] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 11/09/2020] [Indexed: 12/22/2022]
Abstract
The objective was to evaluate the effect of photobiomodulation (PBM) using 980 nm diode laser therapy (0.60 W, 0.77 W cm-2 , 36 J, 46 J cm-2 , 60 s) irradiated in continuous wave mode by flat-top hand-piece on socket healing in the maxilla and mandible. A split-mouth experimental design was performed on 6 dogs. The 3rd premolar tooth was extracted from the maxilla and mandibles for both sides. The right-sided sockets were irradiated (PBM group), and the left-sided sockets were kept as control. Irradiation was done after extraction and at 48-h interval for 14 days. Both the buccal and lingual sides were irradiated to reach a total irradiation time of 120 s. Bone density was evaluated at 3, 4 and 5 weeks using cone beam computed tomography. We showed that maxillary sockets in the PBM group had higher bone density compared to control one at 3, 4, 5 weeks (P = 0.029, <0.001, <0.001), respectively. Mandibular sockets revealed no significant difference between PBM and control at 3 weeks (P = 0.347), while at 4 and 5 weeks PBM group showed higher bone density (P = 0.004, <0.001). In both groups, there was a significant increase (P < 0.001) in bone density by time which was higher in the PBM group. We concluded that PBM using a flat-top hand-piece of 980-nm improved the bone density of extraction sockets.
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Affiliation(s)
- Mohamed A Abdel Hamid
- Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Amira A Zaied
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Fayoum University, Fayoum, Egypt
| | - Mohamed Khalifa Zayet
- Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University, New Giza University, Giza, Egypt
| | - Hany Abdelmageed
- Laser Therapy Centre, Department of Surgical and Diagnostic Sciences (DISC), University of Genoa, Genoa, Italy
| | - Elham A Hassan
- Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Andrea Amaroli
- Faculty of Dentistry, Department of Orthopaedic Dentistry, First Moscow State Medical University (Sechenov University), Moscow, Russia
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Gulati P, Kumar M, Issar G, Thakral A. Effect of low level laser therapy on crestal bone levels around dental implants—A pilot study. Clin Implant Dent Relat Res 2020; 22:739-746. [DOI: 10.1111/cid.12957] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 08/26/2020] [Accepted: 09/27/2020] [Indexed: 11/28/2022]
Affiliation(s)
- Prachi Gulati
- Department of Prosthodontics I.T.S. Centre for Dental Studies and Research Ghaziabad Uttar Pradesh India
| | - Manoj Kumar
- Department of Prosthodontics I.T.S. Centre for Dental Studies and Research Ghaziabad Uttar Pradesh India
| | - Gaurav Issar
- Department of Prosthodontics I.T.S. Centre for Dental Studies and Research Ghaziabad Uttar Pradesh India
| | - Ankur Thakral
- Oral and Maxillofacial Surgeon Military Dental Centre New Delhi India
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Matys J, Flieger R, Świder K, Gedrange T, Hutchings G, Dyszkiewicz-Konwińska M, Kempisty B, Nammour S, Dominiak M, Grzech-Leśniak K. A Clinical Trial of Photobiomodulation Effect on Orthodontic Microscrews Stability Using a 635 nm Red Laser Light. PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY 2020; 38:607-613. [PMID: 33026974 DOI: 10.1089/photob.2020.4863] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Background: One of the procedures enhancing implants stability can be photobiomodulation. Objective: To assess the effect of a 635 nm wavelength on orthodontic microscrews stability, survival rate, and an individual patient's pain score. Materials and methods: The study was done with 15 subjects, 30 orthodontic microscrews with a length of 10 mm and diameter 1.4 mm. Implants inserted on the right and left side of the maxilla. The implants in the test group (G1) were irradiated with the laser at palatal and buccal part of peri-implant area (two points). The diode laser (SmartM PRO; Lasotronix, Warsaw, Poland) was used with the following settings: power: 100 mW, spot size: 0.5 cm2, mean power density (irradiance): 200 mW/cm2, in continuous wave (CW) mode, energy per point: 4 J, radiant exposure: 8 J/cm2, time per point: 40 sec, the total energy dose (radiant energy) per session: 8 J in contact mode, handpiece diameter: 8 mm. Laser sessions: day of surgery and 3, 6, 9, 12, 15, 30 days later. Cumulative radiant energy was 59 J. Periotest appliance was used to assess the microscrews stability at day of surgery and 3, 6, 9, 12, 15, 30, 60 days later. Each patient received a survey for individual pain assessment (NRS-11) promptly after the implantation. Results: The analysis after 60 days revealed significantly higher secondary stability for the laser-irradiated microscrews group in comparison with control implants (G2 group) (p = 0.0037). We observed significantly higher stability in the experimental group compared with the control after 30 days (p = 0.0218). Moreover, we noted significantly higher microimplants stability for the control group in comparison with the test group, 9 days after implantation (p = 0.0374). Laser application had no effect on pain reduction noted in the first day in comparison with the control sites (p = 0.6690). No microscrews were lost in the study. Conclusions: Application of a 635 nm laser on peri-implant soft tissue increased the microscrews stability after 30 and 60 days.
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Affiliation(s)
- Jacek Matys
- Laser Laboratory, Department of Dental Surgery, Wroclaw Medical University, Wroclaw, Poland
| | - Rafał Flieger
- Department of Orthodontics, Dentimed Outpatient Clinic, Kościan, Poland
| | | | - Tomasz Gedrange
- Department of Dental Surgery, Wroclaw Medical University, Wroclaw, Poland.,Department of Orthodontics, Technische Universität Dresden, Dresden, Germany
| | - Greg Hutchings
- The School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, United Kingdom.,Department of Anatomy, Poznan University of Medical Sciences, Poznan, Poland
| | - Marta Dyszkiewicz-Konwińska
- Department of Biomaterials and Experimental Dentistry and Poznan University of Medical Sciences, Poznan, Poland.,Department of Anatomy, Poznan University of Medical Sciences, Poznan, Poland
| | - Bartosz Kempisty
- Department of Anatomy and Poznan University of Medical Sciences, Poznan, Poland.,Department of Histology and Embryology, Poznan University of Medical Sciences, Poznan, Poland.,Department of Obstetrics and Gynaecology, University Hospital and Masaryk University, Brno, Czech Republic.,Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University, Toruń, Poland
| | - Samir Nammour
- Department of Dental Science, Faculty of Medicine, University of Liege, Liege, Belgium
| | - Marzena Dominiak
- Department of Dental Surgery, Wroclaw Medical University, Wroclaw, Poland
| | - Kinga Grzech-Leśniak
- Laser Laboratory, Department of Dental Surgery, Wroclaw Medical University, Wroclaw, Poland.,Department of Periodontics, Virginia Commonwealth University School of Dentistry, Richmond, Virginia, USA
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Silveira VS, Mayer L, Gerhardt de Oliveira M, de Carvalho ALH, Weber JBB. Systemic Effects of Photobiomodulation on the Morphology of the Thyroid and Sublingual Glands: A Study in Rabbits. PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY 2020; 38:425-430. [PMID: 32667862 DOI: 10.1089/photob.2019.4701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Objective: To investigate whether photobiomodulation (PBM) applied in a clinical situation with the purpose of improving the healing process of implants placed in the rabbit mandible would cause any morphological change in the thyroid and sublingual glands as a systemic effect of laser irradiation. Methods: Thirty-two New Zealand rabbits were randomly divided into four groups of eight animals each, one control group (CI, nonirradiated animals) and three experimental groups (EI, EII, and EIII) that received PBM postoperatively with an aluminum/gallium/arsenide laser diode (Theralase®) at a wavelength of 830 nm (infrared) and 50 mW output power applied to two irradiation fields per session, for a total of seven sessions. All rabbits underwent surgical extraction of the mandibular left incisor, followed by immediate placement of an osseointegrated implant in the fresh socket. The experimental groups EI, EII, and EIII received PBM at an energy density of 5, 2.5, and 10 J/cm2, respectively, per irradiation field. Results: There was no histomorphometric change in any of the groups. Conclusions: PBM, based on the irradiation protocol used in this study, does not cause morphological changes in the thyroid and sublingual glands when used to stimulate peri-implant bone healing in the rabbit mandible.
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Affiliation(s)
- Vinícius Salim Silveira
- Advanced Education Program in Oral and Maxillofacial Surgery, Technological Dental School CEEO (FATEC Dental), Igrejinha, Rio Grande do Sul, Brazil
| | - Luciano Mayer
- Oral and Maxillofacial Surgery Department, Graduate Program in Dentistry, School of Dentistry, Universidade Federal da Bahia (UFB), Salvador, Bahia, Brazil.,Graduate Program in Implant Therapy at Associação Gaúcha de Ortodontia (AGOR), Porto Alegre, Rio Grande do Sul, Brazil
| | - Marília Gerhardt de Oliveira
- Grupo Hospitalar Conceição (GHC), National Council for Scientific and Technological Development (CNPq), Porto Alegre, Rio Grande do Sul, Brazil
| | - Ana Luísa Homem de Carvalho
- School of Health and Life Sciences, Graduate Program in Dentistry, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
| | - João Batista Blessmann Weber
- School of Health and Life Sciences, Graduate Program in Dentistry, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Rio Grande do Sul, Brazil
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Photobiomodulation-Underlying Mechanism and Clinical Applications. J Clin Med 2020; 9:jcm9061724. [PMID: 32503238 PMCID: PMC7356229 DOI: 10.3390/jcm9061724] [Citation(s) in RCA: 207] [Impact Index Per Article: 51.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 05/14/2020] [Accepted: 06/01/2020] [Indexed: 02/07/2023] Open
Abstract
The purpose of this study is to explore the possibilities for the application of laser therapy in medicine and dentistry by analyzing lasers' underlying mechanism of action on different cells, with a special focus on stem cells and mechanisms of repair. The interest in the application of laser therapy in medicine and dentistry has remarkably increased in the last decade. There are different types of lasers available and their usage is well defined by different parameters, such as: wavelength, energy density, power output, and duration of radiation. Laser irradiation can induce a photobiomodulatory (PBM) effect on cells and tissues, contributing to a directed modulation of cell behaviors, enhancing the processes of tissue repair. Photobiomodulation (PBM), also known as low-level laser therapy (LLLT), can induce cell proliferation and enhance stem cell differentiation. Laser therapy is a non-invasive method that contributes to pain relief and reduces inflammation, parallel to the enhanced healing and tissue repair processes. The application of these properties was employed and observed in the treatment of various diseases and conditions, such as diabetes, brain injury, spinal cord damage, dermatological conditions, oral irritation, and in different areas of dentistry.
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Lobato RPB, Kinalski MDA, Martins TM, Agostini BA, Bergoli CD, dos Santos MBF. Influence of low‐level laser therapy on implant stability in implants placed in fresh extraction sockets: A randomized clinical trial. Clin Implant Dent Relat Res 2020; 22:261-269. [DOI: 10.1111/cid.12904] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 03/10/2020] [Accepted: 03/17/2020] [Indexed: 12/14/2022]
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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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Miniaturized Electromagnetic Device Abutment Improves Stability of the Dental Implants. J Craniofac Surg 2019; 30:1055-1057. [PMID: 30059423 DOI: 10.1097/scs.0000000000004763] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND The overall success and predictability of dental implant treatment hinge on the primary stability, direct bone-to implant contact formation, and quantity and/or quality of residual bone. Pulsed electromagnetic field has been reported to increase bone regeneration in various clinical situations. Therefore, it was hypothesized that devices which could locally generate a Pulsed electromagnetic field would stimulate bone healing and increase bone density surrounding implants. OBJECTIVE To retrospectively assess the effects of the miniaturized electromagnetic device (MED) on the implants stability for the first time in human subjects, in a prospective case controlled series. METHODS Twelve consecutive patients (28 implants) were included in the study.Twelve MED healing caps and 16 regular control healing caps were inserted. Resonance frequency analysis (RFA) was performed at implant placement and abutment connection and an implant stability quotient value was given for each implant. RESULTS Twenty-eight dental implants were included in the current study. Maxillary implants stability was significantly higher with MED healing cups compared with controls at 15 days postimplantation (66.2 vs 62.1, P = .0008). Resonance frequency analysis test performed at 30 days postimplantation demonstrated significantly increased stability in MED as compared with the control 73.5 ± 3.2 vs 66.7 ± 4.8 in mandibular implants and 74 ± 1.7 vs 65 ± 2.3 in maxillary implants. At the 50 days postimplantation, RFA tests revealed markedly higher stability of the maxillary implants with MED active healing caps compared with nonactive 75.4 ± 5.1 vs 68.5 ± 8.5, respectively. CONCLUSIONS We conclude that MED-abutment implants demonstrated a superior stability during the early phase of healing as compared with standard implants.
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Chen Y, Liu C, Chen X, Mo A. Clinical evidence of photobiomodulation therapy (PBMT) on implant stability and success: a systematic review and meta-analysis. BMC Oral Health 2019; 19:77. [PMID: 31064350 PMCID: PMC6505209 DOI: 10.1186/s12903-019-0779-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Accepted: 04/29/2019] [Indexed: 02/05/2023] Open
Abstract
Background Photobiomodulation therapy (PBMT), a type of light therapy that uses the concept of photobiomodulation, is developed to promote bone healing. Clinical studies have been conducted to assess the influence of PBMT on dental implant stability and success rate. This is the first systematic review and meta-analysis to assess the effect of PBMT and methodological quality of these studies on implants in human clinical trials. Methods An electronic search was performed in Pubmed, Embase, and the Cochrane Controlled Register of Trials (CENTRAL). Results Initially, 675 articles were identified, among which only 8 met the inclusion criteria. Four of the 8 studies presented a low risk of bias, whereas the other 4 were of moderate risk. Our review focused on implant success rates and implant stability measured at days 0 and 10, and at 3, 4, 6, and 12 weeks. No significant differences were observed between the PBMT group and the control group regarding implant stability or success rate. Conclusions The existing clinical studies did not provide sufficient evidence to observe positive effects of PBMT on implants in patients. An increased number of high-quality clinical randomized controlled trials (RCTs) are required to verify the data and to draw convincing conclusions.
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Affiliation(s)
- Yuan Chen
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Caojie Liu
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xinlei Chen
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Anchun Mo
- Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
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Photobiomodulation by a 635nm Diode Laser on Peri-Implant Bone: Primary and Secondary Stability and Bone Density Analysis-A Randomized Clinical Trial. BIOMED RESEARCH INTERNATIONAL 2019; 2019:2785302. [PMID: 31143771 PMCID: PMC6501257 DOI: 10.1155/2019/2785302] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 04/03/2019] [Accepted: 04/10/2019] [Indexed: 11/21/2022]
Abstract
Introduction Various procedures in dental implantology are performed to enhance the bone healing process and implant stability. One of these methods can be a low-level laser therapy (LLLT). Objectives The aim of our study was to evaluate the stabilization (primary and secondary) and bone density in peri-implant zone after LLLT protocol using a 635 nm diode laser. Material and Methods The research included 40 implants placed in the posterior region of a mandible in 24 patients (8 women and 16 man; age: 46.7 ± 8.7 years). The patients were randomly divided into 2 groups G1 (n=12, 18 implants) and G2 (n=12, 22 implants) according to the treatment procedure; G1 (test): 635 nm laser, with handpiece diameter: 8mm, output power: 100mW, spot area: 0.5024cm2, average power density: 199.04mW/cm2, continuous mode, dose: 4J per point (8J/cm2), time: 40 sec per point, 2 points (irradiation on a buccal and a lingual side of the alveolus/implant), and total energy per session 8J; G2 (control): no laser irradiation. The G1 (test) group's implants were irradiated according to the following protocol: 1 day before surgery, immediately after the surgery and 2, 4, 7, and 14 days after. The total energy after all therapeutic sessions was 48J. The implants stability was measured employing a Periotest device (Periotest Test Value: PTV) (measured immediately after the surgery, 7 days, 2 weeks, 4 weeks, and 2 and 3 months after the surgery) and the bone density using cone-beam computed tomography (grayscale value) (measured immediately after the surgery, 4 weeks and 12 weeks after the treatment). Results The average implant stability at different time points showed lower PTV value (higher stability) at 2nd and 4th week after 635 nm laser irradiation (G1) compared with a control (G2) group (p<0.01). The secondary stability of the implants after 12 weeks observation was not significantly higher for the laser group in contrast to none-irradiated implants (p>0.05). The mean grayscale value at the apical, middle, and cervical level of the titanium implants showed the reduction of pixel grayscale value after 2 weeks and was lower for the G1 group in contrast to the G2 group (p<0.01). The value of grayscale after 12 weeks was significantly higher at the middle and apical level of the implants in the G1group in contrast to the G2 group (p<0.01). Conclusion The application of the 635 nm diode laser enhanced secondary implant stability and bone density. However, to assess the impact of the LLLT on peri-implant bone with different bone densities, further well-controlled long-term trials on larger study groups are needed.
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Hosseinpour S, Fekrazad R, Arany PR, Ye Q. Molecular impacts of photobiomodulation on bone regeneration: A systematic review. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2019; 149:147-159. [PMID: 31002851 DOI: 10.1016/j.pbiomolbio.2019.04.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 04/16/2019] [Indexed: 12/13/2022]
Abstract
Photobiomodulation (PBM) encompasses a light application aimed to increase healing process, tissue regeneration, and reducing inflammation and pain. PBM is specifically aimed to modify the expression of cellular molecules; however, PBM impacts on cellular and molecular pathways especially in bone regenerative medicine have been investigated in scattered different studies. The purpose of the current study is to systematically review evidence on molecular impact of PBM on bone regeneration. A comprehensive electronic search in Medline, Scopus, EMBASE, EBSCO, Cochrane library, web of science, and google scholar was conducted from January 1975 to October 2018 limited to English language publications on administrations of photobiomodulation for bone regeneration which evaluated biological factors. In addition, hand search of selected journals was done to retrieve all articles. This systematic review was performed based on PRISMA guideline. Among these studies, five articles reported in vitro results, twelve articles were in vivo, and three of them were clinical trials. The data tabulated according to the type of markers (osteogenic markers, angiogenic markers, growth factors, and inflammation mediators). PBM's effects depend on many parameters which energy density is more important than the others. PBM can significantly enhance expression of osteocalcin, collagen, RUNX-2, vascular endothelial growth factor, bone morphogenic proteins, and COX-2. Although since the heterogeneity of the studies and their limitations, an evidence-based decision for definite therapeutic application of PBM is still unattainable, the findings of our review can help other researchers to ameliorate their study design and elect more efficient approach for their investigation.
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Affiliation(s)
- Sepanta Hosseinpour
- School of Dentistry, The University of Queensland, Brisbane, Queensland 4006, Australia; Department of Periodontology, Dental Faculty - Laser Research Center in Medical Sciences, AJA University of Medical Sciences, 19839, Fatemi, Tehran, Iran.
| | - Reza Fekrazad
- Department of Periodontology, Dental Faculty - Laser Research Center in Medical Sciences, AJA University of Medical Sciences, 19839, Fatemi, Tehran, Iran; International Network for Photo Medicine and Photo Dynamic Therapy (INPMPDT), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
| | - Praveen R Arany
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, The State University of New York, NY, 14214, USA.
| | - Qingsong Ye
- School of Dentistry, The University of Queensland, Brisbane, Queensland 4006, Australia.
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Mohajerani H, Salehi AM, Tabeie F, Shafiei S, Tabrizi R. Can Low-Level Laser and Light-Emitting Diode Enhance the Stability of Dental Implants? J Maxillofac Oral Surg 2019; 19:302-306. [PMID: 32346244 DOI: 10.1007/s12663-019-01210-3] [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: 05/06/2018] [Accepted: 03/13/2019] [Indexed: 11/29/2022] Open
Abstract
Purpose Stability of dental implants is an important factor for evaluation of osseointegration. The aim of this study was to evaluate the effect of combined use of low-level laser (LLL) and light-emitting diode (LED) therapy on the stability of dental implants during the healing phase. Materials and Methods This was a randomized clinical trial. Patients were assigned to two groups: In group 1, patients received LLL and LED 20 min/day for 10 days after implant insertion. Patients in group 2 (controls) did not undergo LLL and LED. The implant stability quotient (ISQ) was measured at 0 (time 0), 10 (time 1), 21 (time 2), 42 (time 3) and 63 days (time 4) after implant placement. Independent t test was used to compare the ISQs between the two groups. Results Fifty-eight patients were studied in two groups (n = 28). The mean ISQ did not differ immediately after insertion (P > 0.05). The mean ISQ differed significantly between the two groups on days 10, 21, 42 and 63 (P < 0.05). Results demonstrated an increase in the amount of ISQ in group 1 (intervention) at times 1, 2, 3 and 4. In the control group, the amount of ISQ decreased on days 10 and 21 following implant insertion, but increased afterward on days 42 and 63. Conclusion The results of this study showed that simultaneous use of LLL and LED increased the stability of the implants after 9 weeks of follow-up.
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Affiliation(s)
- Hassan Mohajerani
- 1OMFS Department, Shahid Beheshti Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Faraj Tabeie
- 3Department of Basic Sciences, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shervin Shafiei
- 1OMFS Department, Shahid Beheshti Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Tabrizi
- 1OMFS Department, Shahid Beheshti Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Zein R, Selting W, Benedicenti S. Effect of Low-Level Laser Therapy on Bone Regeneration During Osseointegration and Bone Graft. Photomed Laser Surg 2017; 35:649-658. [DOI: 10.1089/pho.2017.4275] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Randa Zein
- Department of Surgical Sciences and Integrated Diagnostic, University of Genoa, Genoa, Italy
| | - Wayne Selting
- Department of Surgical Sciences and Integrated Diagnostic, University of Genoa, Genoa, Italy
| | - Stefano Benedicenti
- Department of Surgical Sciences and Integrated Diagnostic, University of Genoa, Genoa, Italy
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Torkzaban P, Kasraei S, Torabi S, Farhadian M. Low-level laser therapy with 940 nm diode laser on stability of dental implants: a randomized controlled clinical trial. Lasers Med Sci 2017; 33:287-293. [PMID: 29082462 DOI: 10.1007/s10103-017-2365-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 10/17/2017] [Indexed: 11/29/2022]
Abstract
Low-level laser therapy (LLLT) is a non-invasive modality to promote osteoblastic activity and tissue healing. The aim of this study was to evaluate the efficacy of LLLT for improvement of dental implant stability. This randomized controlled clinical trial was performed on 80 dental implants placed in 19 patients. Implants were randomly divided into two groups (n = 40). Seven sessions of LLLT (940 nm diode laser) were scheduled for the test group implants during 2 weeks. Laser was irradiated to the buccal and palatal sides. The same procedure was performed for the control group implants with laser hand piece in "off" mode. Implant stability was measured by Osstell Mentor device in implant stability quotient (ISQ) value immediately after surgery and 10 days and 3, 6, and 12 weeks later. Repeated measures ANOVA was used to compare the mean ISQ values (implant stability) in the test and control groups. Statistical test revealed no significant difference in the mean values of implant stability between the test and control groups over time (P = 0.557). Although the mean values of implant stability changed significantly in both groups over time (P < 0.05). Although the trend of reduction in stability was slower in the laser group in the first weeks and increased from the 6th to 12th week, LLLT had no significant effect on dental implant stability.
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Affiliation(s)
- Parviz Torkzaban
- Dental Research Center, Department of Periodontics, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Shahin Kasraei
- Department of Restorative Dentistry, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Sara Torabi
- Department of Periodontics, Dental School, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Maryam Farhadian
- Modeling of Noncommunicable Disease Research Center, Department of Biostatistics, Hamadan University of Medical Sciences, Hamadan, Iran
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Does laser phototherapy influence the proliferation of myoepithelial cells in the salivary gland of hypothyroid rats? JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 173:681-685. [PMID: 28732334 DOI: 10.1016/j.jphotobiol.2017.07.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 07/06/2017] [Accepted: 07/10/2017] [Indexed: 12/28/2022]
Abstract
Thyroid hormones influence both development and growth of organs and tissues and guarantee metabolic demands that interfere with the quality of digestive secretions, including those of the salivary glands. Laser phototherapy - LPT can modulate various biological phenomena and its diverse effects permit the action on different cell types. The aim of this study was to evaluate the influence of laser phototherapy on myoepithelial cells of salivary glands of hypothyroid rats. Forty-two albino Wistar rats were divided into two main groups: euthyroid (EU) and hypothyroid (HYPO). Hypothyroidism was induced using propylthiouracil (PTU) for 4weeks. Each group was divided into subgroups: control (without laser) and laser groups (Red/infrared - IR). LPT was used on the submandibular gland and was carried out using a diode laser (λ660 or λ780nm, 40mW, spot size 0.04cm2, irradiation area 1cm2, 300s, 6J/cm2 per gland, 12J/cm2 per session) and started two weeks after PTU treatment. LPT was repeated every other day for two weeks. After animal death, the glands were removed, dissected and processed for immunohistochemical analysis. It was observed an increase in the number of myoepithelial cells of hypothyroid control rats in comparison to euthyroid controls (p=0.001). Visible LPT (λ660nm) caused significant higher proliferation of myoepithelial cells in EU rats when compared to IR LPT (λ 780nm)(p≤0.001).It is concluded that, despite the LPT protocol used did not influence myoepithelial proliferation on hypothyroid rats it significantly increased the proliferation on euthyroid animals.
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de Almeida JM, de Moraes RO, Gusman DJR, Faleiros PL, Nagata MJH, Garcia VG, Theodoro LH, Bosco AF. Influence of low-level laser therapy on the healing process of autogenous bone block grafts in the jaws of systemically nicotine-modified rats: A histomorphometric study. Arch Oral Biol 2017; 75:21-30. [DOI: 10.1016/j.archoralbio.2016.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 10/21/2016] [Accepted: 12/01/2016] [Indexed: 10/20/2022]
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The Comparison of the Efficacy of Blue Light-Emitting Diode Light and 980-nm Low-Level Laser Light on Bone Regeneration. J Craniofac Surg 2016; 27:2185-2189. [DOI: 10.1097/scs.0000000000003068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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Robijns J, Censabella S, Bulens P, Maes A, Mebis J. The use of low-level light therapy in supportive care for patients with breast cancer: review of the literature. Lasers Med Sci 2016; 32:229-242. [DOI: 10.1007/s10103-016-2056-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 08/12/2016] [Indexed: 12/11/2022]
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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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Guo J, Wang Q, Wai D, Zhang QZ, Shi SH, Le AD, Shi ST, Yen SLK. Visible red and infrared light alters gene expression in human marrow stromal fibroblast cells. Orthod Craniofac Res 2016; 18 Suppl 1:50-61. [PMID: 25865533 DOI: 10.1111/ocr.12081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/16/2014] [Indexed: 12/29/2022]
Abstract
OBJECTIVES This study tested whether or not gene expression in human marrow stromal fibroblast (MSF) cells depends on light wavelength and energy density. MATERIALS AND METHODS Primary cultures of isolated human bone marrow stem cells (hBMSC) were exposed to visible red (VR, 633 nm) and infrared (IR, 830 nm) radiation wavelengths from a light emitting diode (LED) over a range of energy densities (0.5, 1.0, 1.5, and 2.0 Joules/cm2) Cultured cells were assayed for cell proliferation, osteogenic potential, adipogenesis, mRNA and protein content. mRNA was analyzed by microarray and compared among different wavelengths and energy densities. Mesenchymal and epithelial cell responses were compared to determine whether responses were cell type specific. Protein array analysis was used to further analyze key pathways identified by microarrays. RESULT Different wavelengths and energy densities produced unique sets of genes identified by microarray analysis. Pathway analysis pointed to TGF-beta 1 in the visible red and Akt 1 in the infrared wavelengths as key pathways to study. TGF-beta protein arrays suggested switching from canonical to non-canonical TGF-beta pathways with increases to longer IR wavelengths. Microarrays suggest RANKL and MMP 10 followed IR energy density dose-response curves. Epithelial and mesenchymal cells respond differently to stimulation by light suggesting cell type-specific response is possible. CONCLUSIONS These studies demonstrate differential gene expression with different wavelengths, energy densities and cell types. These differences in gene expression have the potential to be exploited for therapeutic purposes and can help explain contradictory results in the literature when wavelengths, energy densities and cell types differ.
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Affiliation(s)
- J Guo
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA, USA; Department of Orthodontics, School of Stomatology, Shandong University, Jinan, China
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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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Prados-Frutos JC, Rodríguez-Molinero J, Prados-Privado M, Torres JH, Rojo R. Lack of clinical evidence on low-level laser therapy (LLLT) on dental titanium implant: a systematic review. Lasers Med Sci 2016; 31:383-92. [PMID: 26754180 DOI: 10.1007/s10103-015-1860-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 12/28/2015] [Indexed: 11/28/2022]
Abstract
Low-level laser therapy (LLLT) has proved to have biostimulating effects on tissues over which they are applied, therefore accelerating the healing process. Most studies in implantology were focused on a reduction of the duration of osseointegration. There exist few articles analyzing the potential effects of these therapies on the osseointegration of titanium dental implants. The aim of this study was to assess the effect of LLLT on the interaction between the bone and the titanium dental implant and the methodological quality of the studies. We conducted an electronic search in PubMed, ISI Web, and Cochrane Library. From 37 references obtained, only 14 articles met the inclusion criteria. The analysis of the studies shows that most of the experiments were performed in animals, which have a high risk of bias from the methodological point of view. Only two studies were conducted in human bone under different conditions. Several protocols for the use of low-power laser and different types of laser for all studies analyzed were used. Although animal studies have shown a positive effect on osseointegration of titanium implants, it can be concluded that it is necessary to improve and define a unique protocol to offer a more conclusive result by meta-analysis.
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Affiliation(s)
- J C Prados-Frutos
- Department of Stomatology, Rey Juan Carlos University, Avenida de Atenas, s/n, 28922, Alcorcón, Madrid, Spain
| | - J Rodríguez-Molinero
- Department of Stomatology, Rey Juan Carlos University, Avenida de Atenas, s/n, 28922, Alcorcón, Madrid, Spain
| | - M Prados-Privado
- Department of Stomatology, Rey Juan Carlos University, Avenida de Atenas, s/n, 28922, Alcorcón, Madrid, Spain
| | - J H Torres
- Department of Oral Surgery, Faculty of Odontology, University of Montpellier 1, Montpellier, France
| | - R Rojo
- Department of Stomatology, Rey Juan Carlos University, Avenida de Atenas, s/n, 28922, Alcorcón, Madrid, Spain.
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