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Fig. 4. Bioactivities and PDGF-BB concentrations i...

Fig. 4. Bioactivities and PDGF-BB concentrations in PRF extracts and the supernatant serum fraction. a PRF extracts were added to periosteal cell cultures and incubated for 3 days to evaluate their effects on cell proliferation. No significant differences were observed among three groups. b PRF extracts were subjected to measurement of PDGF-BB levels using an ELISA kit. No significant differenc...

Fig. 3. SEM examination of fibrin fibers formed in...

Fig. 3. SEM examination of fibrin fibers formed in self-clotted PRF and thrombin-stimulated PPP clots. PRF was prepared from fresh and 2-day-old WB samples. Similar observations were obtained from WB samples collected from three other donors. Scale bars = 10 μm Fig. 3. SEM examination of fibrin fibers formed in self-clotted PRF and thrombin-stimulated PPP clots. PRF was prepared from fresh ...

Fig. 2. Appearance of PRF clots prepared from WB s...

Fig. 2. Appearance of PRF clots prepared from WB samples stored for 2 days. These observations are representative of WB samples obtained from four donors Fig. 2. Appearance of PRF clots prepared from WB samples stored for 2 days. These observations are representative of WB samples obtained from four donors

Fig. 1. Glucose levels (a), calcium levels (b), an...

Fig. 1. Glucose levels (a), calcium levels (b), and pH (c) of stored WB samples. Supernatant serum fractions were examined. Plasma fractions prepared by quick centrifugation were used to determine calcium levels in fresh and stored WB samples that were not added CaCl2. N = 6 Fig. 1. Glucose levels (a), calcium levels (b), and pH (c) of stored WB samples. Supernatant serum fractions were...

About this article : Platelet-rich fibrin prepared...

Isobe, K., Suzuki, M., Watanabe, T. et al. Platelet-rich fibrin prepared from stored whole-blood samples. Int J Implant Dent 3, 6 (2017). https://doi.org/10.1186/s40729-017-0068-4 Download citation Received: 21 December 2016 Accepted: 15 February 2017 Published: 01 March 2017 DOI: https://doi.org/10.1186/s40729-017-0068-4

Rights and permissions : Platelet-rich fibrin prep...

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were...

Additional information : Platelet-rich fibrin prep...

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Author information : Platelet-rich fibrin prepared...

You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar Correspondence to Tomo...

Author information : Platelet-rich fibrin prepared...

Tokyo Plastic Dental Society, Kita-ku, Tokyo, Japan Kazushige Isobe, Masashi Suzuki, Taisuke Watanabe, Yutaka Kitamura, Taiji Suzuki, Hideo Kawabata, Masayuki Nakamura, Toshimitsu Okudera & Hajime Okudera Division of Oral Implantology, Niigata University Medical and Dental Hospital, Niigata, Japan Kohya Uematsu Bioscience Medical Research Center, Niigata University Medical and Dental ...

References : Platelet-rich fibrin prepared from st...

Duan X, Bradbury SR, Olsen BR, Berendsen AD. Matrix Biol. 2016;52-54:127–40. Kawase T, Okuda K, Kogami H, Nakayama H, Nagata M, Nakata K, Yoshie H. Characterization of human cultured periosteal sheets expressing bone-forming potential: in vitro and in vivo animal studies. J Tissue Eng Regen Med. 2009;3:218–29. Kawase T, Hayama K, Tsuchimochi M, Nagata M, Okuda K, Yoshie H, Burns DM, Nakata K...

References : Platelet-rich fibrin prepared from st...

Hess J. Conventional blood banking and blood component storage regulation: opportunities for improvement. Blood Transfus. 2010;8 Suppl 3:s9–s15. World Health Organization. Manual on the management, maintenance and use of blood cold chain equipment. http://www.who.int/bloodsafety/Manual_on_Management,Maintenance_and_Use_of_Blood_Cold_Chain_Equipment.pdf. Accessed 26 Nov 2016. van der Meer PF, d...

Abbreviations : Platelet-rich fibrin prepared from...

Acid citrate dextrose solution Concentrated growth factors Citrate phosphate and dextrose Ethylenediaminetetraacetic acid Platelet-derived growth factor Platelet-poor plasma Platelet-rich fibrin Platelet-rich plasma Scanning electron microscope Whole blood

Conclusions : Platelet-rich fibrin prepared from s...

The self-clotted types of platelet concentrates (PRF) can be prepared from ACD-containing stored WB by addition of CaCl2 without a significant reduction in their bioactivity and without other specific reagents or devices. This approach should contribute to dissemination of PRF therapy.

Discussion : Platelet-rich fibrin prepared from st...

Considering the current status of clinical use of platelet concentrates in the fields of periodontology and oral surgery, in this study, we used 10-mL glass tubes that are not oxygen-permeable instead of oxygen-permeable plastic bags for storage of large volumes of WB or platelets. We advanced a working hypothesis that the storage of WB samples in glass tubes would result in a more rapid and subst...

Discussion : Platelet-rich fibrin prepared from st...

Platelet preservation is restricted to 3 and 5 days in Japan and worldwide, respectively. This limit is based on the fact that platelets are sensitive to changes in temperature and pH: when samples are stored at 2 to 6 °C, platelets become unsuitable for production of platelet concentrates [3]. Preservation of platelet concentrates results in a drop of pH below 6.0 depending on the platelet cou...

Results : Platelet-rich fibrin prepared from store...

Glucose and calcium contents and pH of WB or serum samples after centrifugation are shown in Fig. 1. Because glucose is contained in the ACD-A solution, glucose levels in the stored WB and serum samples (see Fig. 4c) after centrifugation were significantly greater than those of freshly collected WB samples. Total free calcium levels, including calcium chelated by citrate, in WB samples decreased...

Methods : Platelet-rich fibrin prepared from store...

PRF extracts prepared as described above were subjected to measurement of PDGF-BB levels using the Human PDGF-BB Quantikine ELISA Kit (R&D Systems, Inc., Minneapolis, MN, USA) as described previously [8]. The PRF clots that were compressed in a stainless-steel compressor were fixed with 2.5% neutralized glutaraldehyde, dehydrated with a series of ethanol solutions and t-butanol, freeze-dried, and...

Methods : Platelet-rich fibrin prepared from store...

Stored WB samples were then mixed intermittently with 200 μL (20 μL × 10 times) of 10% CaCl2 solution and centrifuged by a Medifuge centrifugation system to prepare PRF. When lower amounts of CaCl2 were added, PRF clots were less reproducibly prepared. When higher amounts of CaCl2 were added intermittently, or when the optimal amount of CaCl2 were added at once, PRF clots were never prepa...

Methods : Platelet-rich fibrin prepared from store...

The study design and consent forms for all procedures performed on the study subjects were approved by the ethics committee for human subjects at Niigata University School of Medicine in accordance with the Helsinki Declaration of 1975 as revised in 2008. With informed consent, blood samples (~9.0 mL per tube) were collected from six non-smoking, healthy, male volunteers (27 to 67 years old) us...

Background : Platelet-rich fibrin prepared from st...

Blood preservation is generally and widely used in the fields of blood transfusion and surgery for either autologous or allogeneic blood [1–3]. In case of small lots of blood-derived materials used in regenerative therapy, such as platelet concentrates, it is generally accepted that autologous blood samples should be collected on-site and immediately centrifuged for processing [4]. Accordingly, ...

Abstract : Platelet-rich fibrin prepared from stor...

In regenerative therapy, self-clotted platelet concentrates, such as platelet-rich fibrin (PRF), are generally prepared on-site and are immediately used for treatment. If blood samples or prepared clots can be preserved for several days, their clinical applicability will expand. Here, we prepared PRF from stored whole-blood samples and examined their characteristics. Blood samples were collected ...

Fig. 3. Enzymatic degradability of A-PRF, CGF, and...

Fig. 3. Enzymatic degradability of A-PRF, CGF, and PPTF membranes. Each membrane disk (φ8 mm, 1 mm thick) was immersed in PBS containing trypsin and incubated in a CO2 incubator. N = 4. The asterisks represent significant differences (P 

Fig. 2. Representative stress-strain curves for A-...

Fig. 2. Representative stress-strain curves for A-PRF and CGF membranes and mechanical properties (Young’s modulus, strain at break, and maximum stress) of A-PRF, CGF, and PPTF membranes. N = 3–9 Fig. 2. Representative stress-strain curves for A-PRF and CGF membranes and mechanical properties (Young’s modulus, strain at break, and maximum stress) of A-PRF, CGF, and PPTF membranes. N...

Fig. 1. Surface microstructures of A-PRF, CGF, and...

Fig. 1. Surface microstructures of A-PRF, CGF, and fibrin clots prepared by PPP + CaCl2 and PPTF (fibrin clots prepared by PPP and thrombin). Similar observations were obtained from other three independent blood samples. Scale bar = 10 μm. Note: the same magnification (×9000) was used in all the SEM images shown here Fig. 1. Surface microstructures of A-PRF, CGF, and fibrin clots p...

Table 3 Summaries of preparation procedures, relat...

  A-PRF CGF PPTF Centrifugal conditions 198 g × 8 min 692 g × 2 mina ...

Table 2 Comparison of water content of A-PRF, CGF,...

  Wet weight (g) Dry weight (g) Water content (%) A-PRF 1.905 ± 0.416 0.043 ± 0.014* ...

Table 1 Similarity in size and stretching property...

  Size (W × L mm) Stretching (times longer) Number A-PRF 8.6 ± 1.2 × 27.5 ± 3.5 ...

About this article : Mechanical and degradation pr...

Isobe, K., Watanebe, T., Kawabata, H. et al. Mechanical and degradation properties of advanced platelet-rich fibrin (A-PRF), concentrated growth factors (CGF), and platelet-poor plasma-derived fibrin (PPTF). Int J Implant Dent 3, 17 (2017). https://doi.org/10.1186/s40729-017-0081-7 Download citation Received: 29 January 2017 Accepted: 25 April 2017 Published: 02 May 2017 ...

Rights and permissions : Mechanical and degradatio...

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were...

Author information : Mechanical and degradation pr...

You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar Correspondence to Tomoyuki Kawa...

Author information : Mechanical and degradation pr...

Tokyo Plastic Dental Society, Kita-ku, Tokyo, Japan Kazushige Isobe, Taisuke Watanebe, Hideo Kawabata, Yutaka Kitamura, Toshimitsu Okudera & Hajime Okudera Division of Dental Implantology, Niigata University Medical and Dental Hospital, Niigata, Japan Kohya Uematsu Division of Periodontology, Institute of Medicine and Dentistry, Niigata University, Niigata, Japan Kazuhiro Okuda Bioscie...

References : Mechanical and degradation properties...

Mosesson MW. Fibrinogen and fibrin structure and functions. J Thromb Haemost. 2005;3:1894–904. Kawase T, Kamiya M, Kobayashi M, Tanaka T, Okuda K, Wolff LF, Yoshie H. The heat-compression technique for the conversion of platelet-rich fibrin preparation to a barrier membrane with a reduced rate of biodegradation. J Biomed Mater Res B Appl Biomater. 2015;103:825–31. Hartshorne J, Gluckman H. A...

References : Mechanical and degradation properties...

Choukroun J, Diss A, Simonpieri A, Girard MO, Schoeffler C, Dohan SL, Dohan AJ, Mouhyi J, Dohan DM. Platelet-rich fibrin (PRF): a second-generation platelet concentrate. Part V: histologic evaluations of PRF effects on bone allograft maturation in sinus lift. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2006;101:299–303. Kawase T. Platelet-rich plasma and its derivatives as promising bioac...

Abbreviations : Mechanical and degradation propert...

Acid citrate dextrose solution Advanced platelet-rich fibrin Concentrated growth factors Platelet-poor plasma-derived, thrombin-activated fibrin Platelet-rich plasma

Conclusions : Mechanical and degradation propertie...

In the mechanical parameters and degradability we tested, CGF membranes were almost identical to A-PRF membranes. In contrast, PPTF membranes were mechanically weaker and highly degradable. Therefore, we conclude that all of these fibrin membranes are tough enough to serve as barrier membranes; however, we should pay attention to their degradability and choose an appropriate membrane type dependin...

Discussion : Mechanical and degradation properties...

Growth factor release is a key function of these fibrin clots for tissue regeneration. Our previous study [16] demonstrated that CGF membranes compressed by the stainless steel compression device contain significantly higher levels of growth factors even after releasing approximately 85% of exudate. Repeated rinsing with PBS failed to completely remove the growth factors from CGF membranes. The ri...

Discussion : Mechanical and degradation properties...

In this study, we found no apparent differences between A-PRF and CGF clot microstructures, especially in fibrin fiber thickness or crosslink density. However, in PPTF clots, which were prepared through direct conversion of fibrinogen by thrombin, fibrin fiber thickness and their crosslink density were substantially thinner and higher, respectively, than those of either A-PTF or CGF clots. This fi...

Results : Mechanical and degradation properties of...

The main purpose of this study was to compare A-PRF with CGF preparations to find possible differences in mechanical properties. As shown in Table 1, the sizes of A-PRF clots compressed to membranes were 8.6 ± 1.2 mm (W) × 27.5 ± 3.5 mm (L) and very similar to those of CGF clots (8.4 ± 0.8 mm × 27.6 ± 2.5 mm). As reference, PPTF membranes were also prepared by ad...

Methods : Mechanical and degradation properties of...

After pipetting the digestion solution, 50 μL of the digestion solution was collected every 20 min and was stored at −20 °C until protein measurement. Protein levels, which can be considered primarily as levels of digested fibrin fiber, were then determined by a BCA protein assay kit (Takara Bio, Kusatsu, Japan). The protein levels at the time point when the initial fibrin disks were comple...

Methods : Mechanical and degradation properties of...

The mechanical properties of gel sheets were measured at a stretching speed of 1 mm/min with a desktop universal testing machine (EZ test; Shimadzu, Kyoto, Japan), of which maximum load cell capacity was 500 N under standard ambient conditions at 25 ± 3 °C and 50 ± 25% RH. The samples were gripped by clamps at each end (using slip-proof rubber sheets to prevent slippage) such that th...

Methods : Mechanical and degradation properties of...

Blood samples were collected from four non-smoking, healthy, male volunteers with ages ranging from 27 to 56 years. Although having lifestyle-related diseases and receiving medication, these donors had no hindrance in daily life. The study design and consent forms for all procedures performed with the study subjects were approved by the ethical committee for human subjects at Niigata University S...

Background : Mechanical and degradation properties...

In this study, we hypothesized that the mechanical properties of the fibrin membrane are closely related to its degradability. We compared these characteristics among A-PRF, CGF, and PPTF membranes through tensile and digestion tests.

Background : Mechanical and degradation properties...

Platelet-rich fibrin (PRF), a self-clotted preparation of platelet-concentrated, blood-derived biomaterials, is prepared solely by contact activation of intrinsic coagulation pathways through centrifugation without addition of coagulation factors [1, 2]. Therefore, the preparation protocol is drastically simplified, and the resulting clot can be handled easily with forceps. PRF is further modified...

Abstract : Mechanical and degradation properties o...

Fibrin clot membranes prepared from advanced platelet-rich fibrin (A-PRF) or concentrated growth factors (CGF), despite their relatively rapid biodegradability, have been used as bioactive barrier membranes for alveolar bone tissue regeneration. As the membranes degrade, it is thought that the growth factors are gradually released. However, the mechanical and degradable properties of these membran...

About this article : Platelet-rich fibrin prepared...

Isobe, K., Suzuki, M., Watanabe, T. et al. Platelet-rich fibrin prepared from stored whole-blood samples. Int J Implant Dent 3, 6 (2017). https://doi.org/10.1186/s40729-017-0068-4 Download citation Received: 21 December 2016 Accepted: 15 February 2017 Published: 01 March 2017 DOI: https://doi.org/10.1186/s40729-017-0068-4

Rights and permissions : Platelet-rich fibrin prep...

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were...

Additional information : Platelet-rich fibrin prep...

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Author information : Platelet-rich fibrin prepared...

You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in ...

Author information : Platelet-rich fibrin prepared...

Tokyo Plastic Dental Society, Kita-ku, Tokyo, Japan Kazushige Isobe, Masashi Suzuki, Taisuke Watanabe, Yutaka Kitamura, Taiji Suzuki, Hideo Kawabata, Masayuki Nakamura, Toshimitsu Okudera & Hajime Okudera Division of Oral Implantology, Niigata University Medical and Dental Hospital, Niigata, Japan Kohya Uematsu Bioscience Medical Research Center, Niigata University Medical and Dental ...

References : Platelet-rich fibrin prepared from st...

Duan X, Bradbury SR, Olsen BR, Berendsen AD. Matrix Biol. 2016;52-54:127–40. Kawase T, Okuda K, Kogami H, Nakayama H, Nagata M, Nakata K, Yoshie H. Characterization of human cultured periosteal sheets expressing bone-forming potential: in vitro and in vivo animal studies. J Tissue Eng Regen Med. 2009;3:218–29. Kawase T, Hayama K, Tsuchimochi M, Nagata M, Okuda K, Yoshie H, Burns DM, Nakata K...

References : Platelet-rich fibrin prepared from st...

Hess J. Conventional blood banking and blood component storage regulation: opportunities for improvement. Blood Transfus. 2010;8 Suppl 3:s9–s15. World Health Organization. Manual on the management, maintenance and use of blood cold chain equipment. http://www.who.int/bloodsafety/Manual_on_Management,Maintenance_and_Use_of_Blood_Cold_Chain_Equipment.pdf. Accessed 26 Nov 2016. van der Meer PF, d...

Abbreviations : Platelet-rich fibrin prepared from...

Acid citrate dextrose solution Concentrated growth factors Citrate phosphate and dextrose Ethylenediaminetetraacetic acid Platelet-derived growth factor Platelet-poor plasma Platelet-rich fibrin Platelet-rich plasma Scanning electron microscope Whole blood

Conclusions : Platelet-rich fibrin prepared from s...

The self-clotted types of platelet concentrates (PRF) can be prepared from ACD-containing stored WB by addition of CaCl2 without a significant reduction in their bioactivity and without other specific reagents or devices. This approach should contribute to dissemination of PRF therapy.

Discussion : Platelet-rich fibrin prepared from st...

Considering the current status of clinical use of platelet concentrates in the fields of periodontology and oral surgery, in this study, we used 10-mL glass tubes that are not oxygen-permeable instead of oxygen-permeable plastic bags for storage of large volumes of WB or platelets. We advanced a working hypothesis that the storage of WB samples in glass tubes would result in a more rapid and subst...

Discussion : Platelet-rich fibrin prepared from st...

Platelet preservation is restricted to 3 and 5 days in Japan and worldwide, respectively. This limit is based on the fact that platelets are sensitive to changes in temperature and pH: when samples are stored at 2 to 6 °C, platelets become unsuitable for production of platelet concentrates [3]. Preservation of platelet concentrates results in a drop of pH below 6.0 depending on the platelet cou...

Results : Platelet-rich fibrin prepared from store...

Glucose and calcium contents and pH of WB or serum samples after centrifugation are shown in Fig. 1. Because glucose is contained in the ACD-A solution, glucose levels in the stored WB and serum samples (see Fig. 4c) after centrifugation were significantly greater than those of freshly collected WB samples. Total free calcium levels, including calcium chelated by citrate, in WB samples decreased...

Methods : Platelet-rich fibrin prepared from store...

PRF extracts prepared as described above were subjected to measurement of PDGF-BB levels using the Human PDGF-BB Quantikine ELISA Kit (R&D Systems, Inc., Minneapolis, MN, USA) as described previously [8]. The PRF clots that were compressed in a stainless-steel compressor were fixed with 2.5% neutralized glutaraldehyde, dehydrated with a series of ethanol solutions and t-butanol, freeze-dried, and...

Methods : Platelet-rich fibrin prepared from store...

Stored WB samples were then mixed intermittently with 200 μL (20 μL × 10 times) of 10% CaCl2 solution and centrifuged by a Medifuge centrifugation system to prepare PRF. When lower amounts of CaCl2 were added, PRF clots were less reproducibly prepared. When higher amounts of CaCl2 were added intermittently, or when the optimal amount of CaCl2 were added at once, PRF clots were never prepa...

Methods : Platelet-rich fibrin prepared from store...

The study design and consent forms for all procedures performed on the study subjects were approved by the ethics committee for human subjects at Niigata University School of Medicine in accordance with the Helsinki Declaration of 1975 as revised in 2008. With informed consent, blood samples (~9.0 mL per tube) were collected from six non-smoking, healthy, male volunteers (27 to 67 years old) us...

Background : Platelet-rich fibrin prepared from st...

Blood preservation is generally and widely used in the fields of blood transfusion and surgery for either autologous or allogeneic blood [1–3]. In case of small lots of blood-derived materials used in regenerative therapy, such as platelet concentrates, it is generally accepted that autologous blood samples should be collected on-site and immediately centrifuged for processing [4]. Accordingly, ...

Abstract : Platelet-rich fibrin prepared from stor...

In regenerative therapy, self-clotted platelet concentrates, such as platelet-rich fibrin (PRF), are generally prepared on-site and are immediately used for treatment. If blood samples or prepared clots can be preserved for several days, their clinical applicability will expand. Here, we prepared PRF from stored whole-blood samples and examined their characteristics. Blood samples were collected ...

Fig. 3. Enzymatic degradability of A-PRF, CGF, and...

Fig. 3. Enzymatic degradability of A-PRF, CGF, and PPTF membranes. Each membrane disk (φ8 mm, 1 mm thick) was immersed in PBS containing trypsin and incubated in a CO2 incubator. N = 4. The asterisks represent significant differences (P 

Fig. 2. Representative stress-strain curves for A-...

Fig. 2. Representative stress-strain curves for A-PRF and CGF membranes and mechanical properties (Young’s modulus, strain at break, and maximum stress) of A-PRF, CGF, and PPTF membranes. N = 3–9 Fig. 2. Representative stress-strain curves for A-PRF and CGF membranes and mechanical properties (Young’s modulus, strain at break, and maximum stress) of A-PRF, CGF, and PPTF membranes. N...

Fig. 1. Surface microstructures of A-PRF, CGF, and...

Fig. 1. Surface microstructures of A-PRF, CGF, and fibrin clots prepared by PPP + CaCl2 and PPTF (fibrin clots prepared by PPP and thrombin). Similar observations were obtained from other three independent blood samples. Scale bar = 10 μm. Note: the same magnification (×9000) was used in all the SEM images shown here Fig. 1. Surface microstructures of A-PRF, CGF, and fibrin clots p...

Table 3 Summaries of preparation procedures, relat...

  A-PRF CGF PPTF Centrifugal conditions 198 g × 8 min 692 g × 2 mina ...

Table 2 Comparison of water content of A-PRF, CGF,...

  Wet weight (g) Dry weight (g) Water content (%) A-PRF 1.905 ± 0.416 0.043 ± 0.014* ...

Table 1 Similarity in size and stretching property...

  Size (W × L mm) Stretching (times longer) Number A-PRF 8.6 ± 1.2 × 27.5 ± 3.5 ...

About this article : Mechanical and degradation pr...

Isobe, K., Watanebe, T., Kawabata, H. et al. Mechanical and degradation properties of advanced platelet-rich fibrin (A-PRF), concentrated growth factors (CGF), and platelet-poor plasma-derived fibrin (PPTF). Int J Implant Dent 3, 17 (2017). https://doi.org/10.1186/s40729-017-0081-7 Download citation Received: 29 January 2017 Accepted: 25 April 2017 Published: 02 May 2017 ...

Rights and permissions : Mechanical and degradatio...

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were...

Author information : Mechanical and degradation pr...

You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar Correspondence to Tomoyuki Kawa...

Author information : Mechanical and degradation pr...

Tokyo Plastic Dental Society, Kita-ku, Tokyo, Japan Kazushige Isobe, Taisuke Watanebe, Hideo Kawabata, Yutaka Kitamura, Toshimitsu Okudera & Hajime Okudera Division of Dental Implantology, Niigata University Medical and Dental Hospital, Niigata, Japan Kohya Uematsu Division of Periodontology, Institute of Medicine and Dentistry, Niigata University, Niigata, Japan Kazuhiro Okuda Bioscie...

References : Mechanical and degradation properties...

Mosesson MW. Fibrinogen and fibrin structure and functions. J Thromb Haemost. 2005;3:1894–904. Kawase T, Kamiya M, Kobayashi M, Tanaka T, Okuda K, Wolff LF, Yoshie H. The heat-compression technique for the conversion of platelet-rich fibrin preparation to a barrier membrane with a reduced rate of biodegradation. J Biomed Mater Res B Appl Biomater. 2015;103:825–31. Hartshorne J, Gluckman H. A...

References : Mechanical and degradation properties...

Choukroun J, Diss A, Simonpieri A, Girard MO, Schoeffler C, Dohan SL, Dohan AJ, Mouhyi J, Dohan DM. Platelet-rich fibrin (PRF): a second-generation platelet concentrate. Part V: histologic evaluations of PRF effects on bone allograft maturation in sinus lift. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2006;101:299–303. Kawase T. Platelet-rich plasma and its derivatives as promising bioac...

Abbreviations : Mechanical and degradation propert...

Acid citrate dextrose solution Advanced platelet-rich fibrin Concentrated growth factors Platelet-poor plasma-derived, thrombin-activated fibrin Platelet-rich plasma

Conclusions : Mechanical and degradation propertie...

In the mechanical parameters and degradability we tested, CGF membranes were almost identical to A-PRF membranes. In contrast, PPTF membranes were mechanically weaker and highly degradable. Therefore, we conclude that all of these fibrin membranes are tough enough to serve as barrier membranes; however, we should pay attention to their degradability and choose an appropriate membrane type dependin...

Discussion : Mechanical and degradation properties...

Growth factor release is a key function of these fibrin clots for tissue regeneration. Our previous study [16] demonstrated that CGF membranes compressed by the stainless steel compression device contain significantly higher levels of growth factors even after releasing approximately 85% of exudate. Repeated rinsing with PBS failed to completely remove the growth factors from CGF membranes. The ri...

Discussion : Mechanical and degradation properties...

In this study, we found no apparent differences between A-PRF and CGF clot microstructures, especially in fibrin fiber thickness or crosslink density. However, in PPTF clots, which were prepared through direct conversion of fibrinogen by thrombin, fibrin fiber thickness and their crosslink density were substantially thinner and higher, respectively, than those of either A-PTF or CGF clots. This fi...

Results : Mechanical and degradation properties of...

The main purpose of this study was to compare A-PRF with CGF preparations to find possible differences in mechanical properties. As shown in Table 1, the sizes of A-PRF clots compressed to membranes were 8.6 ± 1.2 mm (W) × 27.5 ± 3.5 mm (L) and very similar to those of CGF clots (8.4 ± 0.8 mm × 27.6 ± 2.5 mm). As reference, PPTF membranes were also prepared by ad...

Methods : Mechanical and degradation properties of...

After pipetting the digestion solution, 50 μL of the digestion solution was collected every 20 min and was stored at −20 °C until protein measurement. Protein levels, which can be considered primarily as levels of digested fibrin fiber, were then determined by a BCA protein assay kit (Takara Bio, Kusatsu, Japan). The protein levels at the time point when the initial fibrin disks were comple...

Methods : Mechanical and degradation properties of...

The mechanical properties of gel sheets were measured at a stretching speed of 1 mm/min with a desktop universal testing machine (EZ test; Shimadzu, Kyoto, Japan), of which maximum load cell capacity was 500 N under standard ambient conditions at 25 ± 3 °C and 50 ± 25% RH. The samples were gripped by clamps at each end (using slip-proof rubber sheets to prevent slippage) such that th...

Methods : Mechanical and degradation properties of...

Blood samples were collected from four non-smoking, healthy, male volunteers with ages ranging from 27 to 56 years. Although having lifestyle-related diseases and receiving medication, these donors had no hindrance in daily life. The study design and consent forms for all procedures performed with the study subjects were approved by the ethical committee for human subjects at Niigata University S...

Background : Mechanical and degradation properties...

In this study, we hypothesized that the mechanical properties of the fibrin membrane are closely related to its degradability. We compared these characteristics among A-PRF, CGF, and PPTF membranes through tensile and digestion tests.

Background : Mechanical and degradation properties...

Platelet-rich fibrin (PRF), a self-clotted preparation of platelet-concentrated, blood-derived biomaterials, is prepared solely by contact activation of intrinsic coagulation pathways through centrifugation without addition of coagulation factors [1, 2]. Therefore, the preparation protocol is drastically simplified, and the resulting clot can be handled easily with forceps. PRF is further modified...

Abstract : Mechanical and degradation properties o...

Fibrin clot membranes prepared from advanced platelet-rich fibrin (A-PRF) or concentrated growth factors (CGF), despite their relatively rapid biodegradability, have been used as bioactive barrier membranes for alveolar bone tissue regeneration. As the membranes degrade, it is thought that the growth factors are gradually released. However, the mechanical and degradable properties of these membran...