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Ibrahim Almusi BJ, Al-Kamali RK. Effect of Platelet-Rich Fibrin Combined With Hyaluronic Acid on Bone Formation in Dental Implant Sockets: An In Vivo Study in Sheep. Cureus 2024; 16:e64651. [PMID: 39015217 PMCID: PMC11251443 DOI: 10.7759/cureus.64651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/16/2024] [Indexed: 07/18/2024] Open
Abstract
OBJECTIVES The goal was to evaluate the effect of the combined growth factor of hyaluronic acid (HA) and advanced platelet-rich fibrin (A-PRF) on acceleration and maturation of bone formation around titanium dental implants in the bone-free space (jumping distance) of an over-preparation socket. MATERIALS AND METHODS Thirty-two titanium dental implants were placed in four sheep and distributed into one control group (A) and three experimental groups (B, C, and D) in two different time periods. Each sheep received eight implants. The eight implants in each sheep were distributed into four groups. The first period was one month after the initial placement, 16 implants were used in two sheep. The second period was three months after the initial placement; another 16 implants were used in the other two sheep. All implants were placed in over-prepared implant sockets, resulting in minimal primary stability. In Group A: the space between the dental implant and the bone of the inner wall of the socket was left without a growth substrate material. In Group B: we added HA between the dental implant and the bone of the inner wall of the socket. In Group C: we added A-PRF between the dental implant and the bone of the inner wall of the socket. In Group D: we added a combination of HA and A-PRF between the dental implant and the bone of the inner wall of the socket. Data was collected for each group at one month and three months at the same time. A high-resolution, desktop micro-CT system (Bruker Skyscan 1275, Kontich, Belgium) was used to scan the specimens. The NRecon software (ver. 1.6.10.4, SkyScan) and CTAn (SkyScan) were used for the visualization and quantitative measurement of the samples. One-way analysis of variance (ANOVA) was used to compare the means of the four study groups in the same period. A post hoc test was used after ANOVA to compare the means of two samples at the same time. A p-value of ≤ 0.05 was considered statistically significant. RESULTS After one month and three months of using combined HA and A-PRF on Group D, significant acceleration was observed in bone formation in all tests around dental implants compared with other groups, while no significant acceleration was observed when they were used separately; all three study groups showed significant results when compared with the control group. CONCLUSION Our data showed that using a combination of HA and A-PRF had a significant effect on the acceleration of the bone formation and ossification process when added to bone-free space (jumping distance) around implants while leaving space without any growth substrates might delay the bone ossification process.
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Affiliation(s)
- Blend J Ibrahim Almusi
- Department of Oral Surgery, Khanazad Teaching Center, Erbil Health Care Institute, Ministry of Health, Erbil, IRQ
| | - Reiadh K Al-Kamali
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Hawler Medical University, Erbil, IRQ
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Elkashty AAR, Aboelmaaty WM, Helmy SM, Elewa ME, Mansour A, Ateia IM. Comparison of Sub-epithelial Connective Tissue Graft and Platelet Rich Fibrin in Peri-implant Soft Tissue Augmentation: A Randomized Clinical Split-mouth Study. Open Dent J 2022. [DOI: 10.2174/18742106-v16-e221123-2022-69] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Aims and Background:
Gingival phenotype has a crucial impact on the peri-implant marginal bone stability. The aim of this clinical trial is to assess and compare the efficacy of the sub-epithelial connective tissue graft (SCTG) and platelet-rich fibrin (PRF) in improving the peri-implant soft tissue phenotype and enhancing esthetic outcomes.
Materials and Methods:
The present study was a split-mouth randomized controlled clinical trial. A total of ten patients who had bilateral missing teeth in the maxillary esthetic zone with a thin gingival phenotype were included in this study. For each study participant, one randomly selected site was treated with SCTG, while the other was treated with PRF membrane during dental implant placement. Treatment outcomes included the assessment of the facial gingival thickness using cone-beam computed tomography (CBCT) at the baseline (T0) and 6 months postoperatively (T1), and the Pink esthetic score (PES) at T1 and 3 months later after prosthesis placement (T2).
Results and Discussion:
Both treatment options resulted in a significant increase in gingival tissue thickness at T1 compared with T0, and in PES at T2 compared with T1 (p ˂ 0.05).
Conclusion:
PRF is an effective alternative to SCTG in augmenting peri-implant soft tissue phenotype and improving esthetic outcomes. This would help overcome the complications associated with harvesting the SCTG and increasing patients’ satisfaction.
Clinical Trial Registration ID: ISRCTN11961919.
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Benalcázar Jalkh EB, Tovar N, Arbex L, Kurgansky G, Torroni A, Gil LF, Wall B, Kohanbash K, Bonfante EA, Coelho PG, Witek L. Effect of leukocyte-platelet-rich fibrin in bone healing around dental implants placed in conventional and wide osteotomy sites: A pre-clinical study. J Biomed Mater Res B Appl Biomater 2022; 110:2705-2713. [PMID: 35771197 DOI: 10.1002/jbm.b.35122] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 04/20/2022] [Accepted: 06/17/2022] [Indexed: 12/15/2022]
Abstract
Leukocyte-platelet-rich fibrin (L-PRF) has been suggested for gap management for immediate implant placement when the distance is greater than 2 mm. However, there remains a paucity in hierarchically designed research to support this application. The present study aimed to evaluate the effect of L-PRF on the osseointegration parameters of dental implants placed after conventional osteotomy of surgically created bone defects that simulate post extraction sockets in a canine model after 3, 6, and 12 weeks in vivo. Eighty dental implants (Intra-Lock, Boca Raton, FL) were placed in the radius of 13 beagle dogs. The experiment consisted of 4 groups (n = 20 implants/group): 1) Regular osteotomy (Reg n/L-PRF); 2) Regular osteotomy and implant placement with L-PRF membrane (Reg L-PRF); 3) Wide osteotomy with no gap management performed, where an osteotomy/bony defect (6 mm of diameter and ~5 mm deep) was created to simulate immediate implant placement in post-extraction sockets, and the gap was left for spontaneous healing (Wide nL-PRF); and 4) Wide osteotomy with L-PRF gap management (Wide L-PRF). L-PRF membranes were obtained by blood drawn from each subject and centrifuged at 2700 rpm (408 RCF-clot) for 12 min. In the experimental groups where L-PRF was utilized, the membrane was inserted into the osteotomy site prior to implant placement. Six dogs had implants placed in the radius for 3 weeks; and 7 dogs had implants placed in the left radius for 6 weeks and in the right radius for 12 weeks. At the corresponding experimental time points, samples were harvested, and subjected to histological processing for qualitative and quantitative analyses, via bone-to-implant contact (BIC) and bone-area-fraction occupancy (BAFO). Qualitative analysis demonstrated increased amounts of bone formation around the implant and within the healing chambers over time for all groups. While comparable histological features were observed for both Reg groups (L-PRF and nL-PRF), the gap management performed in Wide L-PRF group resulted in effective gap filling with improved bone growth in close proximity to the implant surface. Quantitative analyses of BIC and BAFO yielded higher values for both variables at 3 weeks for Wide L-PRF (~38% and ~56% respectively) compared to Wide nL-PRF (~20% for BIC and BAFO) (p < .03). No statistical differences were detected between Wide groups at 6 and 12 weeks, neither between Reg groups, independent of the association with or without the L-PRF membrane at all healing times. L-PRF placed within wide osteotomies, prior to implant placement, resulted in increased early bone formation compared to unfilled wide osteotomies at the early healing time (3 weeks in vivo).
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Affiliation(s)
- Ernesto B Benalcázar Jalkh
- Biomaterials Division - Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA.,Department of Prosthodontics and Periodontology, University of Sao Paulo, Bauru School of Dentistry, Bauru, Brazil
| | - Nick Tovar
- Biomaterials Division - Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA.,Department of Oral and Maxillofacial Surgery, New York University, Langone Medical Center and Bellevue Hospital Center, New York, New York, USA
| | - Leticia Arbex
- Biomaterials Division - Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Gregory Kurgansky
- Biomaterials Division - Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Andrea Torroni
- Hansjörg Wyss Department of Plastic Surgery, NYU Langone Medical Center, New York, New York, USA
| | - Luiz F Gil
- Department of Morphological Sciences, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Brittany Wall
- Biomaterials Division - Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Kimia Kohanbash
- Biomaterials Division - Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA
| | - Estevam A Bonfante
- Department of Prosthodontics and Periodontology, University of Sao Paulo, Bauru School of Dentistry, Bauru, Brazil
| | - Paulo G Coelho
- Biomaterials Division - Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA.,Hansjörg Wyss Department of Plastic Surgery, NYU Langone Medical Center, New York, New York, USA.,Department of Mechanical and Aerospace Engineering, New York University Tandon School of Engineering, Brooklyn, New York, USA.,University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Lukasz Witek
- Biomaterials Division - Department of Molecular Pathobiology, New York University College of Dentistry, New York, New York, USA.,Department of Biomedical Engineering, New York University Tandon School of Engineering, Brooklyn, New York, USA
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Jolic M, Sharma S, Palmquist A, Shah FA. The impact of medication on osseointegration and implant anchorage in bone determined using removal torque-A review. Heliyon 2022; 8:e10844. [PMID: 36276721 PMCID: PMC9582727 DOI: 10.1016/j.heliyon.2022.e10844] [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: 05/09/2022] [Revised: 08/16/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022] Open
Abstract
Permanently anchored metal implants are frequently used in dental, craniomaxillofacial, and orthopaedic rehabilitation. The success of such therapies is owed to the phenomenon of osseointegration-the direct connection between the living bone and the implant. The extent of biomechanical anchorage (i.e., physical interlocking between the implant and bone) can be assessed with removal torque (RTQ) measurement. Implant anchorage is strongly influenced by underlying bone quality, involving physicochemical and biological properties such as composition and structural organisation of extracellular matrix, extent of micro-damage, and bone turnover. In this review, we evaluated the impact of various pharmacological agents on osseointegration, from animal experiments conducting RTQ measurements. In addition to substances whose antiresorptive and/or anti-catabolic effects on bone are well-documented (e.g., alendronate, zoledronate, ibandronate, raloxifene, human parathyroid hormone, odanacatib, and the sclerostin monoclonal antibody), positive effects on RTQ have been reported for substances that do not primarily target bone (e.g., aminoguanidine, insulin, losartan, simvastatin, bone morphogenetic protein, alpha-tocopherol, and the combination of silk fibroin powder and platelet-rich fibrin). On the contrary, several substances (e.g., prednisolone, cyclosporin A, cisplatin, and enamel matrix derivative) tend to adversely impact RTQ. While morphometric parameters such as bone-implant contact appear to influence the biomechanical anchorage, increased or decreased RTQ is not always accompanied by corresponding fluctuations in bone-implant contact. This further confirms that factors such as bone quality underpin biomechanical anchorage of metal implants. Several fundamental questions on drug metabolism and bioavailability, drug dosage, animal-to-human translation, and the consequences of treatment interruption remain yet unanswered.
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Affiliation(s)
- Martina Jolic
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, SE-405 30, Sweden
| | - Sonali Sharma
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, SE-405 30, Sweden
| | - Anders Palmquist
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, SE-405 30, Sweden
| | - Furqan A. Shah
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, SE-405 30, Sweden
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Riaz R, Radhakrishnan M, Perumal J. Comparative Study of the Efficacy of Advanced Platelet-rich Fibrin and Standard Platelet-rich Fibrin in Mandibular Third Molar Surgery. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2022; 14:S781-S787. [PMID: 36110692 PMCID: PMC9469239 DOI: 10.4103/jpbs.jpbs_157_22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 02/25/2022] [Accepted: 02/28/2022] [Indexed: 12/02/2022] Open
Abstract
Background Disimpaction of mandibular of third molar is one of the commonest minor oral surgical procedures. Platelet-rich fibrin (PRF) plays a vital role in both hard and soft tissue healing. There are various subtypes of PRF used for different surgical sites. Objective The purpose of this study is to compare and evaluate the effectiveness of Advanced PRF (A-PRF) and Standard PRF (S-PRF) in the healing process of the surgical sites after the removal of mandibular third molars. Changes in swelling, pain, and mouth opening were evaluated. Materials and Methods 10 patients (3 men, 7 women; 18-35 years old) were selected for the removal of bilateral impacted mandibular third molar teeth. A-PRF and S-PRF were placed in the right-hand side for 5 patients in each group. In both the groups, the left side of the patients was taken as the control group. Postoperative pain was measured using a visual analogue scale (VAS), postoperative swelling was calculated using the distance between multiple facial landmarks (method) and mouth opening measured interincisally on the 1st postoperative day, 3rd day, and the 7th day, respectively. SPSS version 26.0 was used for data analysis. Results Advanced PRF group recorded noteworthy improvement in pain (P = 0.063), swelling (P = 0.001), and mouth opening (P = 0.013) when compared to the standard PRF group. There was statistically substantial variance between the advanced PRF and standard PRF groups. Conclusion Advanced PRF group showed decreased swelling, pain, and increased mouth opening compared to standard PRF group.
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Affiliation(s)
- Rahim Riaz
- Department of Oral and Maxillofacial Surgery, Research Scholar, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India
| | - Mensudar Radhakrishnan
- Department of Conservative Dentistry, Sri Balaji Dental College and Hospital, Chennai, Tamil Nadu, India
| | - Jayavelu Perumal
- Department of OMFS, Madha Dental College, Chennai, Tamil Nadu, India
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6
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Shahbaz Alam M, Dhiman A, Jain V, Bhutia O, Pruthi G. Vertical Bone Implant Contact Around Anterior Immediate Implants and Their Stability After Using Either Alloplast or L-PRF or Both in Peri-Implant Gap: A Prospective Randomized Trial. J Maxillofac Oral Surg 2022; 21:533-541. [PMID: 35712396 PMCID: PMC9192842 DOI: 10.1007/s12663-020-01426-8] [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: 03/20/2020] [Accepted: 07/22/2020] [Indexed: 10/23/2022] Open
Abstract
Purpose Various graft materials have been studied for filling peri-implant gap (PIG), but there was no similar randomized clinical trial to evaluate the effect of Platelet-rich fibrin or alloplast or their combination on vertical bone implant contact (BIC) around immediate implants and their stability over a period of 1 year. Methods Immediate implants were placed in maxillary anterior region of 30 subjects (n = 10). Either alloplast (group I) or L-PRF (group II) or both (group III) were used to fill the PIG following randomization chart. Vertical BIC was measured on peri-apical radiographs which were taken immediately after placement, after 3, 6 and 12 months using Image J software. Periotest was used to measure the implant stability at the time of implant placement, at 3, 6 and 12 months after implantation. Results The comparison of distance from implant shoulder to the first visible bone-to-implant contact (IS-BIC) in each group showed statistically significant bone formation on mesial and distal sides over a 1 year period (p < 0.05). There was no significant difference in IS-BIC distance among the three groups at 1 year (p > 0.05). Periotest values showed that there was significant improvement in implant stability in all groups in 1-year period. On intergroup comparison, the mean difference of periotest values was statistically non-significant among three groups (p > 0.05). Conclusions All the graft materials were effective in promoting osseointegration when used as PIG filling materials alone or in combination around immediate implants in maxillary anterior region. CTRI No REF/2015/06/009200.
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Affiliation(s)
- Md Shahbaz Alam
- Center for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, 110029 India
| | - Arjun Dhiman
- Center for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, 110029 India
| | - Veena Jain
- Department of Prosthodontics, CDER, AIIMS, New Delhi, 110029 India
| | - Ongkila Bhutia
- Department of Oral and Maxillofacial Surgery, CDER, AIIMS, New Delhi, 110029 India
| | - Gunjan Pruthi
- Department of Prosthodontics, Oral Health Sciences Center, PGIMER, Chandigarh, India
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7
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Kim SG. Multiple ways for the same destination: bone regeneration. Maxillofac Plast Reconstr Surg 2022; 44:9. [PMID: 35235091 PMCID: PMC8891406 DOI: 10.1186/s40902-022-00340-y] [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: 02/24/2021] [Accepted: 02/22/2022] [Indexed: 11/25/2022] Open
Abstract
The regeneration of the bone is a challenging topic for maxillofacial plastic and reconstructive surgeons. For successful bone regeneration, timely providing of essential components is prerequisite. They are cellular components (osteoblasts, osteoclasts, and immune cells), extracellular matrix, and inorganic components (calcium and phosphate). Any deficient component can be provided from outside as a graft. Accordingly, there are many ways for successful bone regeneration. Selection of appropriate methods in an individualized situation is important.
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Affiliation(s)
- Seong-Gon Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung, 25457, Republic of Korea.
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8
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Egle K, Salma I, Dubnika A. From Blood to Regenerative Tissue: How Autologous Platelet-Rich Fibrin Can Be Combined with Other Materials to Ensure Controlled Drug and Growth Factor Release. Int J Mol Sci 2021; 22:11553. [PMID: 34768984 PMCID: PMC8583771 DOI: 10.3390/ijms222111553] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/18/2021] [Accepted: 10/18/2021] [Indexed: 01/02/2023] Open
Abstract
The purpose of this review is to examine the latest literature on the use of autologous platelet-rich fibrin as a drug and growth factor carrier system in maxillofacial surgery. Autologous platelet-rich fibrin (PRF) is a unique system that combines properties such as biocompatibility and biodegradability, in addition to containing growth factors and peptides that provide tissue regeneration. This opens up new horizons for the use of all beneficial ingredients in the blood sample for biomedical purposes. By itself, PRF has an unstable effect on osteogenesis: therefore, advanced approaches, including the combination of PRF with materials or drugs, are of great interest in clinics. The main advantage of drug delivery systems is that by controlling drug release, high drug concentrations locally and fewer side effects within other tissue can be achieved. This is especially important in tissues with limited blood supply, such as bone tissue compared to soft tissue. The ability of PRF to degrade naturally is considered an advantage for its use as a "warehouse" of controlled drug release systems. We are focusing on this concentrate, as it is easy to use in manipulations and can be delivered directly to the surgical site. The target audience for this review are researchers and medical doctors who are involved in the development and research of PRFs further studies. Likewise, surgeons who use PRF in their work to treat patients and who advice patients to take the medicine orally.
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Affiliation(s)
- Karina Egle
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre, Institute of General Chemical Engineering, Riga Technical University, LV-1658 Riga, Latvia;
- Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, LV-1658 Riga, Latvia;
| | - Ilze Salma
- Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, LV-1658 Riga, Latvia;
- Institute of Stomatology, Rīga Stradiņš University, LV-1007 Riga, Latvia
| | - Arita Dubnika
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre, Institute of General Chemical Engineering, Riga Technical University, LV-1658 Riga, Latvia;
- Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, LV-1658 Riga, Latvia;
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9
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Girón J, Kerstner E, Medeiros T, Oliveira L, Machado GM, Malfatti CF, Pranke P. Biomaterials for bone regeneration: an orthopedic and dentistry overview. Braz J Med Biol Res 2021; 54:e11055. [PMID: 34133539 PMCID: PMC8208772 DOI: 10.1590/1414-431x2021e11055] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 04/23/2021] [Indexed: 12/14/2022] Open
Abstract
Because bone-associated diseases are increasing, a variety of tissue engineering approaches with bone regeneration purposes have been proposed over the last years. Bone tissue provides a number of important physiological and structural functions in the human body, being essential for hematopoietic maintenance and for providing support and protection of vital organs. Therefore, efforts to develop the ideal scaffold which is able to guide the bone regeneration processes is a relevant target for tissue engineering researchers. Several techniques have been used for scaffolding approaches, such as diverse types of biomaterials. On the other hand, metallic biomaterials are widely used as support devices in dentistry and orthopedics, constituting an important complement for the scaffolds. Hence, the aim of this review is to provide an overview of the degradable biomaterials and metal biomaterials proposed for bone regeneration in the orthopedic and dentistry fields in the last years.
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Affiliation(s)
- J Girón
- Laboratório de Hematologia e Células Tronco, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.,Programa de Pós-graduação em Fisiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | - E Kerstner
- Programa de Pós-graduação em Engenharia de Minas, Metalúrgica e de Materiais, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | - T Medeiros
- Laboratório de Hematologia e Células Tronco, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.,Programa de Pós-graduação em Fisiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | - L Oliveira
- Laboratório de Hematologia e Células Tronco, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | - G M Machado
- Programa de Gradução em Odontologia, Universidade Luterana do Brasil, Canoas, RS, Brasil
| | - C F Malfatti
- Programa de Pós-graduação em Engenharia de Minas, Metalúrgica e de Materiais, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
| | - P Pranke
- Laboratório de Hematologia e Células Tronco, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.,Programa de Pós-graduação em Fisiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.,Instituto de Pesquisa com Células Tronco, Porto Alegre, RS, Brasil
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10
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Farokhi M, Aleemardani M, Solouk A, Mirzadeh H, Teuschl AH, Redl H. Crosslinking strategies for silk fibroin hydrogels: promising biomedical materials. Biomed Mater 2021; 16:022004. [PMID: 33594992 DOI: 10.1088/1748-605x/abb615] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Due to their strong biomimetic potential, silk fibroin (SF) hydrogels are impressive candidates for tissue engineering, due to their tunable mechanical properties, biocompatibility, low immunotoxicity, controllable biodegradability, and a remarkable capacity for biomaterial modification and the realization of a specific molecular structure. The fundamental chemical and physical structure of SF allows its structure to be altered using various crosslinking strategies. The established crosslinking methods enable the formation of three-dimensional (3D) networks under physiological conditions. There are different chemical and physical crosslinking mechanisms available for the generation of SF hydrogels (SFHs). These methods, either chemical or physical, change the structure of SF and improve its mechanical stability, although each method has its advantages and disadvantages. While chemical crosslinking agents guarantee the mechanical strength of SFH through the generation of covalent bonds, they could cause some toxicity, and their usage is not compatible with a cell-friendly technology. On the other hand, physical crosslinking approaches have been implemented in the absence of chemical solvents by the induction of β-sheet conformation in the SF structure. Unfortunately, it is not easy to control the shape and properties of SFHs when using this method. The current review discusses the different crosslinking mechanisms of SFH in detail, in order to support the development of engineered SFHs for biomedical applications.
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Affiliation(s)
- Maryam Farokhi
- Biomedical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran. Maryam Farokhi and Mina Aleemardani contributed equally
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11
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Fang J, Xin XR, Li W, Wang HC, Lv HX, Zhou YM. Immediate implant placement in combination with platelet rich-fibrin into extraction sites with periapical infection in the esthetic zone: A case report and review of literature. World J Clin Cases 2021; 9:960-969. [PMID: 33585645 PMCID: PMC7852644 DOI: 10.12998/wjcc.v9.i4.960] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/02/2020] [Accepted: 12/16/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND In this case, platelet-rich fibrin (PRF) was added to guided tissue regeneration as a biomaterial in proper order for immediate planting in aesthetic area with periapical infection.
CASE SUMMARY With the history of endodontic failure in maxillary central incisor, a 34-year-old female patient required the extraction of maxillary anterior residual root and immediate implantation. Cone beam computed tomography and clinical observation were used to assess the regeneration of soft and bone tissue. Before operation, cone beam computed tomography showed the anterior residual root had serious periapical periodontitis with insufficient labial bone in the aesthetic zone. The patient underwent immediate implant placement and reconstruction of the bone substitution by modified guided bone regeneration. The barrier was a three-layer structure of PRF-collagen membrane-PRF that covered the mixture of PRF and Bio-Oss to promote both osteogenesis and soft tissue healing. At 6 mo postoperatively, the definitive crown was placed after accomplished finial impression. One-year follow-up showed a satisfactory aesthetic effect with no obvious absorption of the labial bone and soft tissue.
CONCLUSION The use of PRF in combination with guided bone regeneration can serve as a reliable and simple adjuvant for immediate implanting in infected socket and result in a stable osteogenic effect with good aesthetic outcome.
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Affiliation(s)
- Jiao Fang
- Department of Dental Implantology, Hospital of Stomatology, Jilin University, Changchun 130021, Jilin Province, China
| | - Xi-Rui Xin
- Department of Dental Implantology, Hospital of Stomatology, Jilin University, Changchun 130021, Jilin Province, China
| | - Wen Li
- Department of Dental Implantology, Hospital of Stomatology, Jilin University, Changchun 130021, Jilin Province, China
| | - Han-Chi Wang
- Department of Dental Implantology, Hospital of Stomatology, Jilin University, Changchun 130021, Jilin Province, China
| | - Hui-Xin Lv
- Department of Dental Implantology, Hospital of Stomatology, Jilin University, Changchun 130021, Jilin Province, China
| | - Yan-Min Zhou
- Department of Dental Implantology, Hospital of Stomatology, Jilin University, Changchun 130021, Jilin Province, China
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Lovati AB, Lopa S, Bottagisio M, Talò G, Canciani E, Dellavia C, Alessandrino A, Biagiotti M, Freddi G, Segatti F, Moretti M. Peptide-Enriched Silk Fibroin Sponge and Trabecular Titanium Composites to Enhance Bone Ingrowth of Prosthetic Implants in an Ovine Model of Bone Gaps. Front Bioeng Biotechnol 2020; 8:563203. [PMID: 33195126 PMCID: PMC7604365 DOI: 10.3389/fbioe.2020.563203] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 09/21/2020] [Indexed: 12/18/2022] Open
Abstract
Osteoarthritis frequently requires arthroplasty. Cementless implants are widely used in clinics to replace damaged cartilage or missing bone tissue. In cementless arthroplasty, the risk of aseptic loosening strictly depends on implant stability and bone–implant interface, which are fundamental to guarantee the long-term success of the implant. Ameliorating the features of prosthetic materials, including their porosity and/or geometry, and identifying osteoconductive and/or osteoinductive coatings of implant surfaces are the main strategies to enhance the bone-implant contact surface area. Herein, the development of a novel composite consisting in the association of macro-porous trabecular titanium with silk fibroin (SF) sponges enriched with anionic fibroin-derived polypeptides is described. This composite is applied to improve early bone ingrowth into the implant mesh in a sheep model of bone defects. The composite enables to nucleate carbonated hydroxyapatite and accelerates the osteoblastic differentiation of resident cells, inducing an outward bone growth, a feature that can be particularly relevant when applying these implants in the case of poor osseointegration. Moreover, the osteoconductive properties of peptide-enriched SF sponges support an inward bone deposition from the native bone towards the implants. This technology can be exploited to improve the biological functionality of various prosthetic materials in terms of early bone fixation and prevention of aseptic loosening in prosthetic surgery.
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Affiliation(s)
- Arianna B Lovati
- IRCCS Istituto Ortopedico Galeazzi, Cell and Tissue Engineering Laboratory, Milan, Italy
| | - Silvia Lopa
- IRCCS Istituto Ortopedico Galeazzi, Cell and Tissue Engineering Laboratory, Milan, Italy
| | - Marta Bottagisio
- IRCCS Istituto Ortopedico Galeazzi, Laboratory of Clinical Chemistry and Microbiology, Milan, Italy
| | - Giuseppe Talò
- IRCCS Istituto Ortopedico Galeazzi, Cell and Tissue Engineering Laboratory, Milan, Italy
| | - Elena Canciani
- Ground Sections Laboratory, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
| | - Claudia Dellavia
- Ground Sections Laboratory, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
| | | | | | | | | | - Matteo Moretti
- IRCCS Istituto Ortopedico Galeazzi, Cell and Tissue Engineering Laboratory, Milan, Italy.,Regenerative Medicine Technologies Lab, Ente Ospedaliero Cantonale, Lugano, Switzerland
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Tone T, Shimizu Y, Saito H, Sato T, Ito H, Takada Y, Takahashi M, Odashima K, Oikawa M, Takahashi T, Kumamoto H. In vivo behavior of untreated and compressed concentrated growth factors as biomaterials in rabbits. Dent Mater J 2020; 40:8-15. [PMID: 32779604 DOI: 10.4012/dmj.2018-285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To characterize concentrated growth factors (CGFs) in vivo, we examined the degradation of implanted CGF in rabbits. Untreated CGF (U-CGF) and compressed CGF (C-CGF) were subcutaneously implanted into the dorsum. Histological analyses showed that the U-CGF and C-CGF induced very few inflammatory cells and that the U-CGF and C-CGF were subsequently degraded with dendritic invasion of granulation tissue. The C-CGF histopathologically remained for longer term than the U-CGF. Aggregated CD31+ and RAM11+ cells appeared in and around the implanted CGF. The number of macrophages and blood vessels in the CGF-implanted groups was greater than that in the sham group. There were more blood vessels in the U-CGF group than that in the C-CGF and sham group. We showed that CGF was degraded by macrophages in 4 weeks and enhanced angiogenesis with dendritically branching new capillaries. Therefore, the U-CGF and C-CGF can be clinically applied as a biomaterial inducing angiogenesis.
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Affiliation(s)
- Takeshi Tone
- Department of Oral Pathology, Graduate School of Dentistry, Tohoku University.,Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Yoshinaka Shimizu
- Department of Oral Pathology, Graduate School of Dentistry, Tohoku University
| | - Haruka Saito
- Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Takumi Sato
- Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Hidetoshi Ito
- Department of Oral Pathology, Graduate School of Dentistry, Tohoku University
| | - Yukyo Takada
- Department of Dental Biomaterials, Graduate School of Dentistry, Tohoku University
| | - Masatoshi Takahashi
- Department of Dental Biomaterials, Graduate School of Dentistry, Tohoku University
| | - Kenji Odashima
- Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Mariko Oikawa
- Department of Oral Pathology, Graduate School of Dentistry, Tohoku University
| | - Tetsu Takahashi
- Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Hiroyuki Kumamoto
- Department of Oral Pathology, Graduate School of Dentistry, Tohoku University
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Nano-hydroxyapatite mineralized silk fibroin porous scaffold for tooth extraction site preservation. Dent Mater 2019; 35:1397-1407. [DOI: 10.1016/j.dental.2019.07.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 06/12/2019] [Accepted: 07/15/2019] [Indexed: 12/13/2022]
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Goczkowski M, Gobin M, Hindié M, Agniel R, Larreta-Garde V. Properties of interpenetrating polymer networks associating fibrin and silk fibroin networks obtained by a double enzymatic method. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 104:109931. [PMID: 31499978 DOI: 10.1016/j.msec.2019.109931] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 06/17/2019] [Accepted: 06/30/2019] [Indexed: 10/26/2022]
Abstract
Fibrin gels are of interest as biomaterials for regenerative medicine but present poor mechanical properties, undergo fast degradation and strongly contract in presence of cells. To face these drawbacks, a fibrin network can be associated with another polymer network, in an Interpenetrating Polymer Network (IPN) architecture. In this study, we report the properties of an IPN comprising a fibrin (Fb) network and a silk fibroin (SF) network. This IPN is synthesized through the action of 2 enzymes, each one being specific of one protein gelation, i.e. thrombin (Tb) for Fb gelation, and horseradish peroxidase (HRP) for SF gelation. The effective formation of both Fb and SF networks in an IPN architecture was first verified at qualitative and quantitative levels. The resulting IPN was easily manipulable, displayed high viscoelastic properties and showed homogeneous macro- and micro-structure. Then the degradability of the IPN by two proteases, thermolysin (TL) and trypsin (TRY), obeying different mechanisms was presented. Finally, two-dimensional culture of human fibroblasts on the IPN surface induced little material contraction, while fibroblasts showed healthy morphology, displayed high viability and produced mature extracellular matrix (ECM) proteins. Taken together, the results suggest that this new IPN have a strong potential for tissue engineering and regenerative medicine.
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Affiliation(s)
- Mathieu Goczkowski
- Equipe de Recherche sur les Relations Matrice Extracellulaire Cellules (ERRMECe), Institut des Matériaux, Cergy-Pontoise University, Cergy-Pontoise, France; Celogos, Paris, France
| | - Maxime Gobin
- Equipe de Recherche sur les Relations Matrice Extracellulaire Cellules (ERRMECe), Institut des Matériaux, Cergy-Pontoise University, Cergy-Pontoise, France
| | - Mathilde Hindié
- Equipe de Recherche sur les Relations Matrice Extracellulaire Cellules (ERRMECe), Institut des Matériaux, Cergy-Pontoise University, Cergy-Pontoise, France
| | - Rémy Agniel
- Equipe de Recherche sur les Relations Matrice Extracellulaire Cellules (ERRMECe), Institut des Matériaux, Cergy-Pontoise University, Cergy-Pontoise, France
| | - Véronique Larreta-Garde
- Equipe de Recherche sur les Relations Matrice Extracellulaire Cellules (ERRMECe), Institut des Matériaux, Cergy-Pontoise University, Cergy-Pontoise, France.
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Sleem SSMEB, Zayet MK, El-Ghareeb TI, Saleh HAK. Evaluation of The Bio-Stimulatory Effect of Platelet Rich Fibrin Augmented by Diode LASER Compared to Platelet Rich Fibrin Alone on Dental Implant Replacing Posterior Mandibular Teeth. Randomised Clinical Trial: Split Mouth Study. Open Access Maced J Med Sci 2019; 7:869-875. [PMID: 30962853 PMCID: PMC6447333 DOI: 10.3889/oamjms.2019.183] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 02/23/2019] [Accepted: 02/24/2019] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Restoring masticatory function and replacing missing teeth with minimal pain and discomfort are the most important issues for the patient and clinician. Nowadays dental implants became the most popular line of treatment to replace missing teeth; offering a comfortable long lasting prosthesis. Osseo-integration reflects the long term success of a dental implant. Many bio-modulators are used aiming to improve the osseointegration and healing around dental implants such as Low-Level Laser treatment (LLLT) and Platelet Rich Fibrin (PRF). PRF has been proven to improve bone repair process around the dental implant. LLLT is considered a noninvasive, safe technique that stimulates osteogenesis and alleviates post-operative pain. AIM Evaluation of the bio-stimulatory effect of LLLT on a dental implant with PRF compared to PRF alone clinically and radiographically. METHODS A randomised clinical trial with the split-mouth design was conducted on nine patients with bilaterally missing lower posterior tooth. All patients received one dental implant on each side with PRF. LASER application was performed to one side twice weekly for one month starting on the day of insertion. Post-operative pain was assessed daily through the first week using numerical rating pain scale (NRS) as the primary outcome. Relative peri-implant bone density was measured using direct digital intraoral radiography immediately after insertion, one, four and nine months postoperatively. Implants stability were measured using radio frequency assessment immediately after insertion, four and nine months post-operative as secondary outcomes. RESULTS The NRS for pain was significantly decreased by the end of the first-week postoperatively in the intervention and control group with a mean of (2.22 ± 1.56) (2.11 ± 1.83) respectively. However, there was no statistically significant difference between the test groups at P-Value (0.892). The relative bone density values were decreased by the end of the ninth month of follow-up in the intervention and control group with a mean of (134.42 ± 16.13) (128.77 ± 33.54) respectively. No statistically significant difference was observed between the two test groups at P-value (0.863). The radiofrequency values for implant stability showed no statically significant difference after nine months of follow up when compared to the initial stability values at the day of insertion in the intervention and control group. The mean radiofrequency values were (67.24 ± 1.79) and (66.9 ± 2.57) respectively, and no statistically significant difference was observed between the two test groups at P-value (0.793). CONCLUSION There are no statistically significant differences in post-operative pain values, implant stability and bone density between the implant sites treated with PRF augmented by Diode laser compared to implant sites treated by PRF alone.
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Abstract
Silk derived from the silkworm is known for its excellent biological and mechanical properties. It has been used in various fields as a biomaterial, especially in bone tissue engineering scaffolding. Recently, silk protein-based biomaterial has been used as a barrier membrane scaffolding for guided bone regeneration (GBR). GBR promotes bone regeneration in bone defect areas using special barrier membranes. GBR membranes should have biocompatibility, biodegradability, cell occlusion, the mechanical properties of space-making, and easy clinical handling. Silk-based biomaterial has excellent biologic and mechanical properties that make it a good candidate to be used as GBR membranes. Recently, various forms of silk protein-based membranes have been introduced, demonstrating excellent bone regeneration ability, including osteogenic cell proliferation and osteogenic gene expression, and promoting new bone regeneration in vivo. In this article, we introduced the characteristics of silk protein as bone tissue engineering scaffolding and the recent application of such silk material as a GBR membrane. We also suggested future studies exploring additional uses of silk-based materials as GBR membranes.
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Biomimetic Implant Surface Functionalization with Liquid L-PRF Products: In Vitro Study. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9031435. [PMID: 29854805 PMCID: PMC5964419 DOI: 10.1155/2018/9031435] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 03/22/2018] [Indexed: 01/30/2023]
Abstract
Objective Platelet-rich fibrin (PRF) clots and membranes are autologous blood concentrates widely used in oral surgical procedures; less is known, however, about the liquid formulations of such products. The aim of this in vitro study is to assess the behavior of different implant surfaces when in contact with two liquid leucocyte- and platelet-rich fibrin (L-PRF) products. Methods Six commercial pure titanium discs, of 9.5 mm diameter and 1.5 mm thickness, were used. Three of these samples had a micro/nano-rough surface; three were machined. Three different protocols were tested. Protocols involved the immersion of the samples in (1) a platelets, lymphocytes, and fibrinogen liquid concentrate (PLyF) for 10 minutes, (2) an exudate obtained from L-PRF clots rich in fibronectin and vitronectin for 5 minutes, and (3) the fibronectin/vitronectin exudate for 2 minutes followed by immersion in the PLyF concentrate for further 8 minutes. After these treatments, the samples were fixed and observed using a scanning electron microscope (SEM). Results Under microscopic observation, (1) the samples treated with the PLyF concentrate revealed a dense fibrin network in direct contact with the implant surface and a significant number of formed elements of blood; (2) in the samples treated with the fibronectin/vitronectin exudates, only a small number of white and red blood cells were detectable; and (3) in samples exposed to the combined treatment, there was an apparent increase in the thickness of the fibrin layer. When compared to the machined surface, the micro/nano-rough samples showed an overall increased retention of fibrin, leading to a thicker coating. Conclusions Liquid L-PRF products promote the formation of a dense fibrin clot on micro/nano-rough implant surfaces in vitro. The adjunctive treatment of surfaces with the fibronectin/vitronectin exudate could provide support to contact of the fibrin with the surface, though it is not essential for the clot formation. Further studies are necessary to better elucidate the properties and benefits of liquid L-PRF products.
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Histological Evaluation of the Effect of Concentrated Growth Factor on Bone Healing. J Craniofac Surg 2018; 27:1494-7. [PMID: 27428921 DOI: 10.1097/scs.0000000000002873] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES The aim of this study was to evaluate the effects of concentrated growth factors (CGF) on the healing of peri-implant bone defects in an animal model. STUDY DESIGN Twenty 4-month-old New Zealand White rabbits, each with an average weight of 3.5 kg, were used in this blinded, prospective, experimental study. Two implants were placed and 2 peri-impant defects were prepared in each rabbit tibia. Bone defects were created monocortically in the tibia of each rabbit using a trephine burr with a diameter of 8 mm. The implants were installed in each hole. The rabbits were divided into 4 groups: in group E, the defect was left empty; in group CGF, the defects were filled only with CGF; in group AB, the defects were filled with autogenous bone; and in group AB+CGF, the defects were filled with autogenous bone and CGF. The animals were euthanized at week 8 postimplantation. All implants from the 20 animals were fixed in 10% formalin and evaluated histomorphometrically. RESULTS The mean defect area was highest in group E and lowest in group CGF+AB (P <0.05). The area of the defect differed significantly between groups AB and CGF+AB (P <0.05), but not between groups CGF and E. Implant-to-bone contact was lowest in group E. In the defect areas of groups CGF, AB and CGF+AB, a small amount of new bone formed around the implant. CONCLUSIONS In this animal model of a peri-implant bone defect, restoration was achieved using a combination of autogenous bone and CGF. Further studies are needed to determine the behavior of CGF when used in the repair of bone defects in humans.
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Ruan SQ, Deng J, Yan L, Huang WL. Composite scaffolds loaded with bone mesenchymal stem cells promote the repair of radial bone defects in rabbit model. Biomed Pharmacother 2017; 97:600-606. [PMID: 29101803 DOI: 10.1016/j.biopha.2017.10.110] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/17/2017] [Accepted: 10/21/2017] [Indexed: 02/06/2023] Open
Abstract
This study aimed to investigate the efficacy of three-dimensional scaffolds of silk fibroin/chitosan/nano-hydroxyapatite (SF/CS/nHA) and bone marrow derived mesenchymal stem cells (BMSCs) on the repair of long segmental bone defects in rabbits. BMSCs were cultured with SF/CS/nHA in vitro, and cell proliferation, alkaline phosphatase activity and Ca2+ content were examined. A 15mm segmental defect in the radius was generated in 12 New Zealand White rabbits, which were divided randomly into three groups (n=4): experimental group with SF/CS/nHA scaffold of induced BMSCs; control group with SF/CS/nHA scaffold; and blank group without any materials. Postoperatively at 12 weeks, osteogenesis effect and the degradation and absorption of SF/CS/nHA were evaluated by X-ray, hematoxylin eosin staining, and scanning electron microscopy. In vitro, SF/CS/nHA scaffolds exhibited good biocompatibility and no toxicity. SF/CS/nHA promoted adhesion, growth, and calcium nodule formation of BMSCs compared to control (P<0.05). In vivo, we observed gradual new bone formation and bone defect gradually recovered at 12 weeks in experimental and control group, but more new bone was formed in experimental group (P<0.05). In blank group, limited bone formation was observed and bone defect was obvious. In conclusion, SF/CS/nHA scaffolds loaded with BMSCs achieve high efficacy to repair segmental defect in the radius.
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Affiliation(s)
- Shi-Qiang Ruan
- Department of Orthopaedics Surgery, the First People's Hospital of Zunyi City, Zunyi, 563003, China
| | - Jiang Deng
- Department of Orthopaedics Surgery, the First People's Hospital of Zunyi City, Zunyi, 563003, China.
| | - Ling Yan
- Department of Orthopaedics Surgery, the First People's Hospital of Zunyi City, Zunyi, 563003, China
| | - Wen-Liang Huang
- Department of Orthopaedics Surgery, the First People's Hospital of Zunyi City, Zunyi, 563003, China
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Jain A, Jaiswal GR, Kumathalli K, Kumar R, Singh A, Sarwan A. Comparative Evaluation of Platelet Rich Fibrin and Dehydrated Amniotic Membrane for the Treatment of Gingival Recession- A Clinical Study. J Clin Diagn Res 2017; 11:ZC24-ZC28. [PMID: 28969268 DOI: 10.7860/jcdr/2017/29599.10362] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 07/13/2017] [Indexed: 11/24/2022]
Abstract
INTRODUCTION The main objective of any therapeutic intervention aimed at root coverage is to restore the tissue margin to the cemento-enamel junction and to regenerate the lost periodontium. AIM To compare the effectiveness of Platelet Rich Fibrin (PRF) and Amniotic Membrane (AM) in the treatment of gingival recession by Coronally Advanced Flap (CAF) Technique. MATERIALS AND METHODS Thirty systemically healthy patients who met inclusion-exclusion criteria were selected. After Phase-I therapy, patients were randomly allocated to one of the groups; PRF (Group-A) and Amnion Group (Group-B). Clinical parameters like Plaque Index (PI), Recession Depth (RD) and Width of Keratinized Gingiva (WKG) were measured on the baseline day, three months and six months postoperatively. Mann-Whitney test and Wilcoxon signed ranks test were applied for intergroup and intragroup comparisons respectively. RESULTS Intergroup comparison between platelet rich fibrin and amniotic membrane showed statistically insignificant difference in the recession depth and width of keratinized gingiva at three and six months postoperatively. CONCLUSION Both the membranes were equally effective in terms of recession coverage and increase in width of keratinized gingiva.
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Affiliation(s)
- Ankita Jain
- Postgraduate Student, Department of Periodontics, Sri Aurobindo College of Dentistry, Indore, Madhya pradesh, India
| | - Gagan Rajesh Jaiswal
- Professor, Department of Periodontics, Sri Aurobindo College of Dentistry, Indore, Madhya pradesh, India
| | - Kanteshwari Kumathalli
- Principal and Head, Department of Periodontics, Sri Aurobindo College of Dentistry, Indore, Madhya pradesh, India
| | - Rajesh Kumar
- Reader, Department of Periodontics, Sri Aurobindo College of Dentistry, Indore, Madhya pradesh, India
| | - Alisha Singh
- Postgraduate Student, Department of Periodontics, Sri Aurobindo College of Dentistry, Indore, Madhya pradesh, India
| | - Aakrti Sarwan
- Postgraduate Student, Department of Periodontics, Sri Aurobindo College of Dentistry, Indore, Madhya pradesh, India
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Yerke LM, Jamjoom A, Zahid TM, Cohen RE. The Effect of Platelet-Rich Fibrin, Calcium Sulfate Hemihydrate, Platelet-Rich Plasma and Resorbable Collagen on Soft Tissue Closure of Extraction Sites. J Funct Biomater 2017; 8:jfb8020017. [PMID: 28587096 PMCID: PMC5491998 DOI: 10.3390/jfb8020017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 05/16/2017] [Accepted: 05/22/2017] [Indexed: 11/16/2022] Open
Abstract
Rapid and complete soft tissue healing after tooth extraction minimizes surgical complications and facilitates subsequent implant placement. We used four treatment methods and assessed changes in soft tissue socket closure following tooth extraction in humans. The effects of platelet-rich fibrin-calcium sulfate hemihydrate (PRF-CSH), platelet-rich plasma-calcium sulfate hemihydrate (PRP-CSH), a resorbable collagen dressing (RCD), and no grafting material were compared in a randomized, controlled pilot study with a blinded parallel design (N = 23). Patients with a hopeless tooth scheduled for extraction were randomly assigned to one of the four treatment groups. Socket measurements were obtained immediately after extraction and treatment, as well as after 21 days. There was a significant decrease in the total epithelialized external surface area of the extraction sockets in each group at all time points. However, there were no significant differences in soft tissue closure (p > 0.05) at any time point and PRF-CSH or PRP-CSH did not provide any additional benefit to enhance the soft tissue closure of extraction sockets compared with either RCD or sites without graft.
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Affiliation(s)
- Lisa M Yerke
- Department of Periodontics and Endodontics, School of Dental Medicine, University at Buffalo, State University of New York, 250 Squire Hall, Buffalo, NY 14214, USA.
| | - Amal Jamjoom
- Department of Periodontics and Endodontics, School of Dental Medicine, University at Buffalo, State University of New York, 250 Squire Hall, Buffalo, NY 14214, USA.
| | - Talal M Zahid
- Department of Periodontology, King Abdulaziz University, University District, Jeddah 22252, Saudi Arabia.
| | - Robert E Cohen
- Department of Periodontics and Endodontics, School of Dental Medicine, University at Buffalo, State University of New York, 250 Squire Hall, Buffalo, NY 14214, USA.
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Histological evaluation of effectiveness of platelet-rich fibrin on healing of sinus membrane perforations: A preclinical animal study. J Craniomaxillofac Surg 2017; 45:1150-1157. [PMID: 28596050 DOI: 10.1016/j.jcms.2017.05.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 04/05/2017] [Accepted: 05/02/2017] [Indexed: 12/18/2022] Open
Abstract
The aim of this study was to evaluate the effectiveness of platelet-rich fibrin (PRF) in repairing of Schneiderian membrane perforations in rabbit maxillary sinus. A total of 42 female New Zealand rabbits were randomly divided into two groups. Symmetrical bony defects were created 1 cm in diameter and the sinus membranes were exposed. The Schneiderian membranes were elevated in both sinuses and each membrane was perforated with a 1 cm incision. No treatment was applied to the right perforations in both groups. Left-sided perforations were closed with collagen membrane in the first group and PRF membrane in the other group. Seven animals randomly selected from each group were sacrificed at weeks 1, 2 and 4 in order to be able to examine the amounts of lymphocytes, fibroblasts, veins, and collagen fibers in the area where the membranes were applied. Histological analyses showed that there were no statistically significant differences between the collagen membrane and the PRF membrane in the healing of sinus perforation area. PRF may be considered as an alternative application to collagen membrane in sinus membrane perforations.
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Zhang J, Qi X, Luo X, Li D, Wang H, Li T. Clinical and immunohistochemical performance of lyophilized platelet-rich fibrin (Ly-PRF) on tissue regeneration. Clin Implant Dent Relat Res 2017; 19:466-477. [PMID: 28192870 DOI: 10.1111/cid.12473] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 10/26/2016] [Accepted: 12/26/2016] [Indexed: 12/23/2022]
Abstract
BACKGROUND Platelet-rich fibrin (PRF) has been widely used in oral implantology and other fields, but benefits of the fresh PRF (FPRF (fresh platelet-rich fibrin)) were consequently limited because of its short-term application. Thus, a protocol for the combination of PRF and lyophilization comes up in the present study to address the issue of PRF storage and delayed clinical application, which has little been reported in this field at home and abroad by now. PURPOSE The aim of the present study was to evaluate the applicability of lyophilized platelet-rich fibrin (Ly-PRF) used as the scaffold material for craniofacial tissue regeneration and to compare its biochemical properties with commonly used fresh PRF. MATERIALS AND METHODS Two volunteers with both genders were selected as the source of PRF and Ly-PRF samples. Macro- and micro-scopic appearance evaluation as well as immunohistochemical comparison were performed on PRF samples before and after freeze-drying at -196°C. The second experimental phase was to observe clinical performance when fresh and lyophilized PRF were applied in guided bone regeneration (GBR) operations in 39 patients losing teeth in the anterior maxillary region who required an oral implantation followed by labial bone grafting. RESULTS The conventional histological and transmission electron microscopy images showed the microstructure of Ly-PRF, which resembled a mesh containing apparently irregularly shaped platelets with less alpha-granule than fresh PRF in micro and a translucent membrane with less elasticity than fresh PRF in macro. Simultaneous immunohistological staining results showed positive expression of PDGF-BB, IL-1, IL-4, TNF, TGF-β1 in both fresh and lyophilized PRF, while the expression of PDGF-BB, IL-1, TNF, TGF-β1 has no statistical difference between them (P > .05) but that of IL-4 in Ly-PRF is statistically higher than in fresh PRF (P < .05). When applied in GBR operations, there were no significant differences between Ly-PRF and FPRF in factors of histological and clinical evaluations (i.e., color, swelling, bleeding of the mucosa, pain leveland, and remodeling of hard tissue) performed 3 days, 7 days, and 4 months after the surgery (P > .05). CONCLUSIONS This study strongly supports that lyophilization at -196°C does not largely influence the expression of bioactive factors, the microstructure of fibrinogen or the clinical effects of PRF.
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Affiliation(s)
- Jianming Zhang
- Department of Stomatology, General Hospital, Tianjin Medical University, Tianjin, 300052, People's Republic of China
| | - Xingying Qi
- School of Dentistry, Hospital of Stomatology, Tianjin Medical University, Tianjin, 300070, People's Republic of China
| | - Xiaoding Luo
- School of Dentistry, Hospital of Stomatology, Tianjin Medical University, Tianjin, 300070, People's Republic of China
| | - Dan Li
- Center of Stomatology, China-Japan Friendship Hospital, Beijing, 100029, People's Republic of China
| | - Haorong Wang
- School of Dentistry, Hospital of Stomatology, Tianjin Medical University, Tianjin, 300070, People's Republic of China
| | - Ting Li
- Academic Committe, Bybo Dental Group, Beijing, 100062, People's Republic of China
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SEZGIN Y, URAZ A, TANER IL, ÇULHAOĞLU R. Effects of platelet-rich fibrin on healing of intra-bony defects treated with anorganic bovine bone mineral. Braz Oral Res 2017; 31:e15. [DOI: 10.1590/1807-3107bor-2017.vol31.0015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 12/08/2016] [Indexed: 11/22/2022] Open
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Cell attachment and proliferation of osteoblast-like MG63 cells on silk fibroin membrane for guided bone regeneration. Maxillofac Plast Reconstr Surg 2016; 38:17. [PMID: 27073799 PMCID: PMC4819730 DOI: 10.1186/s40902-016-0062-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 03/10/2016] [Indexed: 12/04/2022] Open
Abstract
Background The aim of this study is to verify the feasibility of using silk fibroin (SF) as a potential membrane for guided bone regeneration (GBR). Methods Various cellular responses (i.e., cell attachment, viability, and proliferation) of osteoblast-like MG63 cells cultured on an SF membrane were quantified. After culturing on an SF membrane for 1, 5, and 7 days, the attachment and surface morphology of MG63 cells were examined by optical and scanning electron microscopy (SEM), cell viability was determined using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and cell proliferation was quantified using 4′,6-diamidino-2-phenylindole (DAPI) fluorescence staining. Results Optical microscopy revealed that MG63 cells cultured on the SF membrane proliferated over the 7-day observation period. The viability of cells cultured on SF membranes (SF group) and on control surfaces (control group) increased over time (P < 0.05); however, at respective time points, cell viability was not significantly different between the two groups (P > 0.05). In contrast, cell proliferation was significantly higher in the SF membrane group than in the control group at 7 days (P < 0.05). Conclusions These results suggest that silk fibroin is a biocompatible material that could be used as a suitable alternative barrier membrane for GBR.
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Yan L, Jiang DM. Study of bone-like hydroxyapatite/polyamino acid composite materials for their biological properties and effects on the reconstruction of long bone defects. DRUG DESIGN DEVELOPMENT AND THERAPY 2015; 9:6497-508. [PMID: 26719675 PMCID: PMC4687625 DOI: 10.2147/dddt.s96207] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Purpose The purpose of this study was to investigate the effect of bone-like hydroxyapatite/polyamino acid (BHA/PAA) in the osteogenesis and reconstruction of long segmental bone defects. Methods In vitro, MG63 cells were cultured with BHA/PAA. The osteoinductive activity of the BHA/PAA material was evaluated using inverted microscopy, scanning electron microscopy, MTT proliferation assay, and the determination of alkaline phosphatase activity and Ca2+ content. In vivo, the radial bone defect was made in 20 New Zealand White rabbits, and then these animal were randomly divided into two groups (n=10), the experimental group (with BHA/PAA) and the control group (without BHA/PAA). Postoperatively, the osteogenesis effect of BHA/PAA was evaluated through X-ray, hematoxylin–eosin staining, observation of the gross bone specimen, immunohistochemistry, and fluorescent confocal scanning microscopy. Results In vitro, BHA/PAA promoted the adhesion, growth, and calcium nodule formation of MG63 cells, and it had good osteogenesis activity. In vivo, with BHA/PAA material degradation and absorption, the new bone gradually formed, and the bone defect gradually recovered in the experimental group. In the control group, a limited bone formation was found at the bone broken ends, and the bone defect was obviously visible. Conclusion In vitro and in vivo, we confirmed that BHA/PAA was effective in inducing osteogenesis and reconstructing a long segmental bone defect.
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Affiliation(s)
- Ling Yan
- Department of Orthopedics Surgery, The First People's Hospital of Zunyi City, Zunyi, People's Republic of China
| | - Dian-ming Jiang
- Department of Orthopedic Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing, People's Republic of China
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Application of platelet-rich fibrin in endodontic surgery: a pilot study. GIORNALE ITALIANO DI ENDODONZIA 2015. [DOI: 10.1016/j.gien.2015.08.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Jamjoom A, Cohen RE. Grafts for Ridge Preservation. J Funct Biomater 2015; 6:833-48. [PMID: 26262646 PMCID: PMC4598680 DOI: 10.3390/jfb6030833] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 07/17/2015] [Accepted: 07/31/2015] [Indexed: 12/22/2022] Open
Abstract
Alveolar ridge bone resorption is a biologic phenomenon that occurs following tooth extraction and cannot be prevented. This paper reviews the vertical and horizontal ridge dimensional changes that are associated with tooth extraction. It also provides an overview of the advantages of ridge preservation as well as grafting materials. A Medline search among English language papers was performed in March 2015 using alveolar ridge preservation, ridge augmentation, and various graft types as search terms. Additional papers were considered following the preliminary review of the initial search that were relevant to alveolar ridge preservation. The literature suggests that ridge preservation methods and augmentation techniques are available to minimize and restore available bone. Numerous grafting materials, such as autografts, allografts, xenografts, and alloplasts, currently are used for ridge preservation. Other materials, such as growth factors, also can be used to enhance biologic outcome.
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Affiliation(s)
- Amal Jamjoom
- Department of Periodontics, State University of New York at Buffalo, Buffalo, NY 14214, USA.
| | - Robert E Cohen
- Department of Periodontics, State University of New York at Buffalo, Buffalo, NY 14214, USA.
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Rodella LF, Bonazza V. Platelet preparations in dentistry: How? Why? Where? When? World J Stomatol 2015; 4:39-55. [DOI: 10.5321/wjs.v4.i2.39] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 04/08/2015] [Accepted: 04/30/2015] [Indexed: 02/06/2023] Open
Abstract
The aim of this article is to review the outcomes of platelet preparations in dentistry. A structured electronic search discovered 348 articles, which described the use of autologous platelet concentrates with a relevance to clinical dentistry. Among these articles, 220 articles investigated platelet rich plasma, 99 investigated platelet rich fibrin, 22 investigated plasma rich in growth factors and 7 investigated the use of concentrated growth factors. Several studies reported beneficial treament outcomes in terms of enhanced bone and soft tissue regeneration.
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Boora P, Rathee M, Bhoria M. Effect of Platelet Rich Fibrin (PRF) on Peri-implant Soft Tissue and Crestal Bone in One-Stage Implant Placement: A Randomized Controlled Trial. J Clin Diagn Res 2015; 9:ZC18-21. [PMID: 26023636 DOI: 10.7860/jcdr/2015/12636.5788] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 02/13/2015] [Indexed: 01/11/2023]
Abstract
INTRODUCTION The viability of Platelet Rich Fibrin (PRF) on enhancement of osseous and associated tissue healing has been substantiated well in literature. However, paucity in the applicability of PRF to enhance peri-implant healing in oral region is not well-corroborated. PURPOSE This prospective study evaluated the effect of Platelet PRF on peri-implant tissue response following one-stage implant placement with non-functional immediate provisionalization in maxillary anterior region. MATERIALS AND METHODS A Prospective, Randomized Controlled Trial (RCT) was conducted across 20 (15 male, 5 Female) systemically healthy subjects with maintainable oral hygiene. Subjects were broadly divided into two groups i.e. Study group (PRF group) and Control group (Non-PRF group). Twenty standard SLA- AB/AE (alumina oxide blasted/acid etched surface treated) tapered threaded dental implants were randomly placed with and without PRF and immediately provisionalized. The subjects were evaluated clinically and radiographically at baseline (at time of implant placement), one month and three month post-operatively for peri-implant soft tissue and crestal bone responses. RESULTS At 3 months, all implants remained osseointegrated. The mean marginal bone changes were observed from baseline to 3 months in both groups with lesser changes observed in PRF Group. No significant differences in probing depth and bleeding on probing were noted during follow-up. CONCLUSION Within the limitations of this study, PRF could be considered as a healing biomaterial with potential beneficial effect on peri-implant tissue and can be used as a therapeutic adjuvant in clinical scenario of one stage, single tooth implant placement procedure in maxillary anterior region.
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Affiliation(s)
- Priyanka Boora
- Post Graduate Student, Department of Prosthodontics, Post Graduate Institute of Dental Sciences, Pt. B.D Sharma University of Health Sciences , Rohtak, Haryana, India
| | - Manu Rathee
- Senior Professor and Head, Department of Prosthodontics, Post Graduate Institute of Dental Sciences, Pt. B.D Sharma University of Health Sciences , Rohtak, Haryana, India
| | - Mohaneesh Bhoria
- Demonstrator, Department of Prosthodontics, Post Graduate Institute of Dental Sciences, Pt. B.D Sharma University of Health Sciences , Rohtak, Haryana, India
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Oliveira MR, deC Silva A, Ferreira S, Avelino CC, Garcia IR, Mariano RC. Influence of the association between platelet-rich fibrin and bovine bone on bone regeneration. A histomorphometric study in the calvaria of rats. Int J Oral Maxillofac Surg 2014; 44:649-55. [PMID: 25553712 DOI: 10.1016/j.ijom.2014.12.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 11/26/2014] [Accepted: 12/04/2014] [Indexed: 11/18/2022]
Abstract
This study aimed to investigate the effects of platelet-rich fibrin (PRF) associated or not with Bio-Oss on bone defects in the calvaria of rats. A critical-size defect of 5-mm diameter was performed in the calvaria of 48 rats. These animals were divided into six groups of eight animals each, according to the treatment received: homogeneous clot, autogenous clot, autogenous PRF, homogeneous PRF, Bio-Oss, or Bio-Oss associated with PRF. The animals were euthanized after 30 or 60 days. Bone regeneration was evaluated by histomorphometric analysis. The highest mean percentages of new bone formation at 30 days (54.05% ± 5.78) and 60 days (63.58% ± 5.78) were observed in the Bio-Oss associated with PRF group; in particular, the percentage of new bone at 30 days was significantly higher than that of all of the other groups (P<0.01). At 60 days, the Bio-Oss associated with PRF (63.58% ± 5.78) and Bio-Oss (57.34% ± 5.78) groups had similar results, and both showed a statistical difference compared to the other groups. PRF had a positive effect on bone regeneration only when associated with Bio-Oss.
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Affiliation(s)
- M R Oliveira
- Federal University of Alfenas, Bairro Centro, Alfenas, MG, Brazil.
| | - A deC Silva
- Federal University of Alfenas, Bairro Centro, Alfenas, MG, Brazil
| | - S Ferreira
- Federal University of Alfenas, Bairro Centro, Alfenas, MG, Brazil
| | - C C Avelino
- Federal University of Alfenas, Bairro Centro, Alfenas, MG, Brazil
| | - I R Garcia
- Federal University of Alfenas, Bairro Centro, Alfenas, MG, Brazil
| | - R C Mariano
- Federal University of Alfenas, Bairro Centro, Alfenas, MG, Brazil
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Lee SW, Kim SG. Membranes for the Guided Bone Regeneration. Maxillofac Plast Reconstr Surg 2014; 36:239-46. [PMID: 27489841 PMCID: PMC4283533 DOI: 10.14402/jkamprs.2014.36.6.239] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 10/07/2014] [Accepted: 10/17/2014] [Indexed: 11/17/2022] Open
Abstract
Many kinds of membrane have been used for the guided bone regeneration (GBR) technique. However, most membranes do not fulfill all requirements for the ideal membrane for the GBR technique. Among them, collagen membrane has been most widely used. However, its high price and weak tensile strength in wet condition are limitations for wide clinical application. Synthetic polymers have also been used for the GBR technique. Recently, silk based membrane has been considered as a membrane for the GBR technique. Despite many promising preclinical data for use of a silk membrane, clinical data regarding the silk membrane has been limited. However, silk based material has been used clinically as vessel-tie material and an electrospun silk membrane was applied successfully to patients. No adverse effect related to the silk suture has been reported. Considering that silk membrane can be provided to patients at a cheap price, its clinical application should be encouraged.
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Affiliation(s)
- Sang-Woon Lee
- Correspondence to Seong-Gon Kim, Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, 7 Jukheon-gil, Gangneung 210-702, Korea, Tel: 82-33-640-2468, Fax: 82-33-641-2477, E-mail:
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Al-Khawlani E, Adly OA, Hamed TAA, Abass AH, Abdelmabood AA. Clinical and radiographic evaluation of platelet-rich fibrin gel on the outcome of mandibular fracture. EGYPTIAN JOURNAL OF ORAL & MAXILLOFACIAL SURGERY 2014; 5:77-83. [DOI: 10.1097/01.omx.0000452512.32326.e8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Kweon H, Lee SW, Hahn BD, Lee YC, Kim SG. Hydroxyapatite and silk combination-coated dental implants result in superior bone formation in the peri-implant area compared with hydroxyapatite and collagen combination-coated implants. J Oral Maxillofac Surg 2014; 72:1928-36. [PMID: 25234528 DOI: 10.1016/j.joms.2014.06.455] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 06/11/2014] [Accepted: 06/30/2014] [Indexed: 01/28/2023]
Abstract
PURPOSE The objective of this study was to compare bone formation after installation of uncoated (UC), hydroxyapatite-coated (HA), collagen plus HA-coated (CH), and silk plus HA-coated (SH) implants. MATERIALS AND METHODS Implants in the UC group had acid-etched surfaces. Surface coating was applied using the aerosol deposition method. Cellular responses on the coated surfaces were examined with scanning electron microscopy. Cellular responses to the surfaces were studied with the corresponding coated discs and MG63 cells. Subsequently, 3-(4, 5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and alkaline phosphatase (ALP) assays were performed. Peri-implant bone formation was evaluated with the rabbit tibia model. Twenty-four implants from each group were installed. The animals were sacrificed 6 weeks after implant installation. Peri-implant bone formation and implant-to-bone contact were measured in histologic sections. Significance of differences across groups was evaluated using analysis of variance. RESULTS Scanning electron microscopic images showed that the CH and SH groups exhibited cells that appeared more spread out than those in the other groups. The SH group exhibited the highest value in the MTT assay. The CH group exhibited the highest level of ALP activity. Comparisons of these modifications with the acid-etched surfaces showed that the CH and SH groups displayed significantly greater peri-implant bone formation (P < .001). CONCLUSION The SH group displayed significantly greater new bone formation and bone-to-implant contact than did the other groups.
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Affiliation(s)
- HaeYong Kweon
- Researcher, Sericultural and Apicultural Materials Division, National Academy of Agricultural Science, RDA, Suwon, Republic of Korea
| | - Sang-Woon Lee
- Division of Oral and Maxillofacial Surgery, Department of Dentistry, Gangneung Asan Hospital, Gangneung, Republic of Korea
| | - Byung-Dong Hahn
- Researcher, Powder and Ceramics Division, Korea Institute of Materials Science, Changwon, Republic of Korea
| | - Yong-Chan Lee
- Clinician, Department of Oral and Maxillofacial Surgery, Bestian Hospital, Seoul, Republic of Korea
| | - Seong-Gon Kim
- Associate Professor and Chairman, Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea.
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Kim MK, Yoo KY, Kwon KJ, Kim SG, Park YW, Lee KG, Jo YY, Kweon HY. Powdered Wound Dressing Materials Made from wild Silkworm Antheraea pernyi Silk Fibroin on Full-skin Thickness Burn Wounds on Rats. Maxillofac Plast Reconstr Surg 2014; 36:111-5. [PMID: 27489820 PMCID: PMC4281898 DOI: 10.14402/jkamprs.2014.36.3.111] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 04/09/2014] [Accepted: 05/26/2014] [Indexed: 11/18/2022] Open
Abstract
Purpose: This study evaluated powdered burn wound dressing materials from wild silkworm fibroin in an animal model. Methods: Fifteen rats were used in this experiment. Full-thickness 2×2 cm burn wounds were created on the back of rats under anesthesia. In the two experimental groups, the wounds were treated with two different dressing materials made from silkworm fibroin. In the Control Group, natural healing without any dressing material was set as control. The wound surface area was measured at five days, seven days and 14 days. Wound healing was evaluated by histologic analysis. Results: By gross observation, there were no infections or severe inflammations through 14 days post-injury. The differences among groups were statistically significant at seven days and 14 days, postoperatively (P <0.037 and 0.001, respectively). By post hoc test, the defect size was significantly smaller in experimental Group 1 compared with the Control Group and experimental Group 2 at seven days postoperatively (P =0.022 and 0.029, respectively). The difference between Group 1 and Group 2 was statistically significant at 14 days postoperatively (P <0.001). Group 1 and control also differed significantly (P =0.002). Group 1 showed a smaller residual scar than the Control Group and Group 2 at 14 days post-injury. Histologic analysis showed more re-epithelization in Groups 1 and 2 than in the Control Groups. Conclusion: Burn wound healing was accelerated with silk fibroin spun by wild silkworm Antheraea pernyi. There was no atypical inflammation with silk dressing materials. In conclusion, silk dressing materials can be used for treatment of burn wound.
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Affiliation(s)
- Min-Keun Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung Wonju National University
| | - Ki-Yeon Yoo
- Department of Oral Anatomy, College of Dentistry and Research Institute of Oral Science, Gangneung-Wonju National University
| | - Kwang-Jun Kwon
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung Wonju National University
| | - Seong-Gon Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung Wonju National University
| | - Young-Wook Park
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung Wonju National University
| | - Kwang-Gill Lee
- Sericultural & Apicultural Materials Division, National Academy of Agricultural Science, Rural Development Administration
| | - You-Young Jo
- Sericultural & Apicultural Materials Division, National Academy of Agricultural Science, Rural Development Administration
| | - Hae-Yong Kweon
- Sericultural & Apicultural Materials Division, National Academy of Agricultural Science, Rural Development Administration
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Bölükbaşı N, Yeniyol S, Tekkesin MS, Altunatmaz K. The use of platelet-rich fibrin in combination with biphasic calcium phosphate in the treatment of bone defects: a histologic and histomorphometric study. Curr Ther Res Clin Exp 2014; 75:15-21. [PMID: 24465037 PMCID: PMC3898181 DOI: 10.1016/j.curtheres.2013.05.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2013] [Indexed: 01/27/2023] Open
Abstract
Background Platelet-rich fibrin (PRF) is a leukocyte and platelet concentrate containing many growth factors. Its potential for hard tissue augmentation as a sole grafting material or in combination with other grafting materials has been investigated in many studies. Objective The aim of this histologic study was to evaluate the efficacy of PRF mixed with biphasic calcium phosphate (BCP) on bone regeneration in surgically created bone defects. Methods Defects 5 mm in diameter were created in both tibias of 6 sheep. The defects were left empty or grafted with BCP, PRF, or BCP+PRF. Animals were killed at 10, 20, and 40 days. The specimens underwent histologic and histomorphometric analysis. Results None of the groups displayed any signs of necrosis. Inflammation was observed in all groups at 10 days; 2 specimens of PRF+BCP and all empty defects showed inflammatory cell infiltration at 20 days. During the 40-day evaluation period, the PRF+BCP group showed the highest ratios of new bone. The other 3 groups showed statistically similar results. In the BCP and PRF+BCP groups, the residual graft ratios were decreased at consecutive time intervals. The difference between the 2 groups was not statistically significant during follow-up. Conclusions The current study revealed a histomorphometric increase in bone formation with the addition of PRF to BCP in surgically created defects in sheep tibia.
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Affiliation(s)
- Nilüfer Bölükbaşı
- Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - Sinem Yeniyol
- Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - Merva Soluk Tekkesin
- Institute of Oncology, Department of Tumor Pathology, Istanbul University, Istanbul, Turkey
| | - Kemal Altunatmaz
- Department of Surgery, Faculty of Veterinary Medicine, Istanbul University, Istanbul, Turkey
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Kim SG, Jeong JH, Che X, Park YT, Lee SW, Jung ES, Choe S, Choi JY. Reconstruction of radial bone defect using gelatin sponge and a BMP-2 combination graft. BMB Rep 2014; 46:328-33. [PMID: 23790977 PMCID: PMC4133902 DOI: 10.5483/bmbrep.2013.46.6.231] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Many bioactive molecules like recombinant human bone morphogenetic protein 2 (rhBMP-2) have been developed for mineralized bone grafts, for which proper scaffolds are necessary to successfully apply the bioactive molecules. In this study, we tested the osteogenic efficacy of rhBMP-2 produced in-house in combination with gelatin sponge as the scaffold carrier in a rabbit radial defect model. The efficacy of the rhBMP-2 was determined by alkaline phosphatase activity assay of C2C12 cells. Two groups of ten rabbits each were treated with rhBMP-2/gelatin sponge, or gelatin sponge only. At 4 weeks, rhBMP-2/gelatin sponge grafts showed more bone regeneration than gelatin sponge grafts, as determined by X-ray radiography, micro-computed tomography, and histological analyses. At 8 weeks, rhBMP-2/gelatin sponge grafts exerted much stronger osteogenic effects. The study demonstrates the improved osteogenic efficacy of the rhBMP-2/gelatin sponge grafts in a rabbit radial bone defect model acting as a bone-inductive material. [BMB Reports 2013; 46(6): 328-333]
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Affiliation(s)
- Seong-Gon Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung 210-702, Korea
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Pripatnanont P, Nuntanaranont T, Vongvatcharanon S, Phurisat K. The primacy of platelet-rich fibrin on bone regeneration of various grafts in rabbit's calvarial defects. J Craniomaxillofac Surg 2013; 41:e191-200. [DOI: 10.1016/j.jcms.2013.01.018] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 12/26/2012] [Accepted: 01/09/2013] [Indexed: 10/27/2022] Open
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Silk Fibroin and 4-Hexylresorcinol Incorporation Membrane for Guided Bone Regeneration. J Craniofac Surg 2013; 24:1927-30. [DOI: 10.1097/scs.0b013e3182a3050c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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Naik B, Karunakar P, Jayadev M, Marshal VR. Role of Platelet rich fibrin in wound healing: A critical review. J Conserv Dent 2013; 16:284-93. [PMID: 23956527 PMCID: PMC3740636 DOI: 10.4103/0972-0707.114344] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 03/21/2013] [Accepted: 04/22/2013] [Indexed: 02/02/2023] Open
Abstract
AIM The aim is to review and discuss the strategies available for use of platelet rich fibrin as healing aid in dentistry. BACKGROUND Platelet rich fibrin (PRF) is a fibrin matrix in which platelet cytokines, growth factors, and cells are trapped and may be released after a certain time and that can serve as a resorbable membrane. Choukroun and his associates were amongst the pioneers for using PRF protocol in oral and maxillofacial surgery to improve bone healing in implant dentistry. Autologous PRF is considered to be a healing biomaterial, and presently, studies have shown its application in various disciplines of dentistry. MATERIALS AND METHODS By using specific keywords, electronic search of scientific papers was carried out on the entire PubMed database with custom range of 5 years. The electronic search yielded 302 papers; based on inclusion and exclusion criteria which were specifically predetermined, 72 papers were identified as suitable to the inclusion criteria and the remaining 230 papers were excluded. After adding three more selected papers through hand search, full text of all the articles retrieved and review was done. By pooling the extracted data from selected papers, the reviewed data was synthesized. CONCLUSION Recently by showing good promising results with use of the PRF, it has proved to have a good prospect for its use as healing aid in various aspects of the dentistry.
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Affiliation(s)
- Balaram Naik
- Department of Conservative Dentistry and Endodontics, Sri Dharmasthala Manjunatheshwara College of Dental Sciences, Dharwad, Karnataka, India
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Thoma DS, Martin IS, Mühlemann S, Jung RE. Systematic review of pre-clinical models assessing implant integration in locally compromised sites and/or systemically compromised animals. J Clin Periodontol 2012; 39 Suppl 12:37-62. [PMID: 22533946 DOI: 10.1111/j.1600-051x.2011.01833.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE The aim was to systematically search the dental literature for pre-clinical models assessing implant integration in locally compromised sites (part 1) and systemically compromised animals (part 2), and to evaluate the quality of reporting of included publications. METHODS A Medline search (1966-2011) was performed, complimented by additional hand searching. The quality of reporting of the included publications was evaluated using the 20 items of the ARRIVE (Animals in Research In Vivo Experiments) guidelines. RESULTS One-hundred and seventy-six (part 1; mean ARRIVE score = 15.6 ± 2.4) and 104 (part 2; 16.2 ± 1.9) studies met the inclusion criteria. The overall mean score for all included studies amounted to 15.8 ± 2.2. Housing (38.3%), allocation of animals (37.9%), numbers analysed (50%) and adverse events (51.4%) of the ARRIVE guidelines were the least reported. Statistically significant differences in mean ARRIVE scores were found depending on the publication date (p < 0.05), with the highest score of 16.7 ± 1.6 for studies published within the last 2 years. CONCLUSIONS A large number of studies met the inclusion criteria. The ARRIVE scores revealed heterogeneity and missing information for selected items in more than 50% of the publications. The quality of reporting shifted towards better-reported pre-clinical trials within recent years.
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Affiliation(s)
- Daniel S Thoma
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zurich, Switzerland.
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Douglas TEL, Gassling V, Declercq HA, Purcz N, Pamula E, Haugen HJ, Chasan S, de Mulder ELW, Jansen JA, Leeuwenburgh SCG. Enzymatically induced mineralization of platelet-rich fibrin. J Biomed Mater Res A 2012; 100:1335-46. [DOI: 10.1002/jbm.a.34073] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Accepted: 01/05/2012] [Indexed: 12/26/2022]
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Cranioplasty With Custom-Made Implants: Analyzing the Cases of 10 Patients. J Oral Maxillofac Surg 2012; 70:e169-76. [DOI: 10.1016/j.joms.2011.09.036] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 09/06/2011] [Accepted: 09/27/2011] [Indexed: 11/22/2022]
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Ruga E, Gallesio C, Boffano P. Platelet-rich fibrin and piezoelectric surgery: a safe technique for the prevention of periodontal complications in third molar surgery. J Craniofac Surg 2011; 22:1951-5. [PMID: 21959479 DOI: 10.1097/scs.0b013e31822ea76b] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
PURPOSE The surgical removal of impacted mesioangular mandibular third molars (3Ms) may produce trauma to the soft tissues and bony structures. In particular, healing of postextractive socket may cause periodontal defects at the distal root of the second molar. The aim of the present prospective study was to assess the outcomes of a surgical protocol to remove 3Ms including the use of ultrasound bone surgery devices and platelet-rich fibrin (PRF) as a grafting material. PATIENTS AND METHODS Twenty-eight impacted mandibular 3Ms were removed. Fourteen 3Ms were removed by piezoelectric osteotomy and PRF application. Instead, the 14 3Ms of the control group were removed by piezoelectric osteotomy but without PRF application. Probing depth in the distal position for all the mandibular second molars was registered before and 6 months after surgery. RESULTS No complications were encountered. In the study group, alveolar socket fulfillment was rated as sufficient in 4 cases and adequate in the remaining 10 cases, whereas in the control group, it was rated as insufficient in 3 cases, sufficient in 4 cases, and adequate in 7 cases. Mean preoperative periodontal probing in the control group was 3.78 mm, whereas in the study group, it was 3.93 mm.Six months after surgery, mean periodontal probing was 3.28 mm in the control group and 3.07 mm in the study group. CONCLUSIONS Combined action of PRF and piezoelectric surgery can be considered a safe and fine technique for third molar surgery and alveolar socket healing.
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Affiliation(s)
- Emanuele Ruga
- Division of Maxillofacial Surgery, Head and Neck Department, San Giovanni Battista Hospital, University of Turin, Turin, Italy
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Song JY, Kim SG, Lee JW, Chae WS, Kweon H, Jo YY, Lee KG, Lee YC, Choi JY, Kim JY. Accelerated healing with the use of a silk fibroin membrane for the guided bone regeneration technique. ACTA ACUST UNITED AC 2011; 112:e26-33. [DOI: 10.1016/j.tripleo.2011.05.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Accepted: 05/01/2011] [Indexed: 11/28/2022]
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Aerosol Deposition of Hydroxyapatite and 4-Hexylresorcinol Coatings on Titanium Alloys for Dental Implants. J Oral Maxillofac Surg 2011; 69:e354-63. [DOI: 10.1016/j.joms.2011.06.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 06/01/2011] [Accepted: 06/01/2011] [Indexed: 11/19/2022]
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Lee JW, Kim SG, Kim JY, Lee YC, Choi JY, Dragos R, Rotaru H. Restoration of a peri-implant defect by platelet-rich fibrin. Oral Surg Oral Med Oral Pathol Oral Radiol 2011; 113:459-63. [PMID: 22676926 DOI: 10.1016/j.tripleo.2011.03.043] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 03/08/2011] [Accepted: 03/31/2011] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The objective of this study was to evaluate the application of platelet-rich fibrin (PRF) into a peri-implant defect in vivo. STUDY DESIGN Eight New Zealand white rabbits were used for this study. Two peri-implants with defects sized 3.0 × 5.0 mm (width × length) were prepared after drilling to host the dental implant in the tibia. Subsequently, the 2 dental implants were installed (diameter, 3.0 mm and length, 8.0 mm). In the experimental group, PRF was applied into the bony defect. In the control group, the peri-implant defect was left unfilled. The animals were humanely killed 8 weeks after implantation and histomorphometric analysis was done. RESULTS In the histomorphometric analysis, mean new bone formation was 29.30% ± 7.50% in the experimental group and 11.06% ± 8.94% in the control group (P = .020). Mean bone-to-implant contact was 39.43% ± 7.39% in the experimental group and 17.11% ± 8.12% in the control group (P = .006). CONCLUSIONS In the animal model, peri-implant defect sized 3.0 × 5.0 mm (width × length) was successfully repaired by the application of PRF alone.
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Affiliation(s)
- Jong-Won Lee
- Resident, Department of Oral and Maxillofacial Surgery, Gangneung-Wonju National University, Gangneung, Republic of Korea
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Sammartino G, Dohan Ehrenfest DM, Carile F, Tia M, Bucci P. Prevention of hemorrhagic complications after dental extractions into open heart surgery patients under anticoagulant therapy: the use of leukocyte- and platelet-rich fibrin. J ORAL IMPLANTOL 2011; 37:681-90. [PMID: 21718187 DOI: 10.1563/aaid-joi-d-11-00001] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Leukocyte- and platelet-rich fibrin (L-PRF) is a biomaterial commonly used in periodontology and implant dentistry to improve healing and tissue regeneration, particularly as filling material in alveolar sockets to regenerate bone for optimal dental implant placement. The objective of this work was to evaluate the use of L-PRF as a safe filling and hemostatic material after dental extractions (or avulsions) for the prevention of hemorrhagic complications in heart surgery patients without modification of the anticoagulant oral therapy. Fifty heart surgery patients under oral anticoagulant therapy who needed dental extractions were selected for the study. Patients were treated with L-PRF clots placed into 168 postextraction sockets without modification of anticoagulant therapy (mean international normalized ratio = 3.16 ± 0.39). Only 2 patients reported hemorrhagic complications (4%), all of which resolved a few hours after the surgery by compression and hemostatic topical agents. Ten patients (20%) showed mild bleeding, which spontaneously resolved or was resolved by minimal compression less than 2 hours after surgery. No case of delayed bleeding was reported. The remaining 38 patients (76%) showed an adequate hemostasis after the dental extractions. In all cases, no alveolitis or painful events were reported, soft tissue healing was quick, and wound closure was always complete at the time of suture removal one week after surgery. The proposed protocol is a reliable therapeutic option to avoid significant bleeding after dental extractions without the suspension of the continuous oral anticoagulant therapy in heart surgery patients. Other applications of the hemostatic and healing properties of L-PRF should be investigated in oral implantology.
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Affiliation(s)
- Gilberto Sammartino
- Department of Odontostomatological and Maxillofacial Sciences, University Federico II, Naples, Italy
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Van Vlierberghe S, Dubruel P, Schacht E. Biopolymer-based hydrogels as scaffolds for tissue engineering applications: a review. Biomacromolecules 2011; 12:1387-408. [PMID: 21388145 DOI: 10.1021/bm200083n] [Citation(s) in RCA: 1075] [Impact Index Per Article: 82.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Hydrogels are physically or chemically cross-linked polymer networks that are able to absorb large amounts of water. They can be classified into different categories depending on various parameters including the preparation method, the charge, and the mechanical and structural characteristics. The present review aims to give an overview of hydrogels based on natural polymers and their various applications in the field of tissue engineering. In a first part, relevant parameters describing different hydrogel properties and the strategies applied to finetune these characteristics will be described. In a second part, an important class of biopolymers that possess thermosensitive properties (UCST or LCST behavior) will be discussed. Another part of the review will be devoted to the application of cryogels. Finally, the most relevant biopolymer-based hydrogel systems, the different methods of preparation, as well as an in depth overview of the applications in the field of tissue engineering will be given.
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Affiliation(s)
- S Van Vlierberghe
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Ghent, Belgium
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