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Kouketsu A, Matsui K, Kawai T, Ezoe Y, Takahashi T, Kamakura S. Teriparatide with octacalcium phosphate collagen composite stimulates osteogenic factors. Tissue Eng Part A 2021; 28:125-135. [PMID: 34278819 DOI: 10.1089/ten.tea.2021.0067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Octacalcium phosphate and collagen composite (OCPcol) promotes osteogenic differentiation and angiogenesis, thereby enhancing bone regeneration. Although a newly developed freeze-dried composite of OCPcol and teriparatide (OCPcolTPTD) reinforced bone regeneration more than OCPcol, the mechanism of bone regeneration remains unresolved. Here, disks containing OCPcolTPTD, OCPcol, or β-tricalcium phosphate (β-TCP) col were inserted into rodents with calvarial bone defects, before euthanasia 4 weeks later. Immunohistochemical and histochemical analyses were performed on bone samples to evaluate bone matrix development, angiogenesis, and osteoclast and osteoblast localization. In the OCPcolTPTD and OCPcol groups, bone regeneration was observed at the surface of calvarial dura mater and around acidophilic granular cells with abundant collagenous fiber-containing cells. Furthermore, the newly formed bone in the OCPcolTPTD group showed a larger total area and individual separated area than the other groups. Various osteogenic proteins were detected in the regenerated bone and peri-bone tissues via histochemistry and immunohistochemistry. Although the expression of several osteogenic biomarkers in the OCPcolTPTD group after 4 weeks of implantation was significantly lower than that in the OCPcol group, new bone formation by OCPcolTPTD in the center of the defect, where bone regeneration is difficult, tended to be superior to that by OCPcol. These results suggest that OCPcolTPTD enhanced bone regeneration more evenly and homogenously than OCPcol.
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Affiliation(s)
- Atsumu Kouketsu
- Tohoku University Graduate School of Dentistry School of Dentistry, 89292, Division of Oral and Maxillofacial Surgery, Department of Oral Medicine and Surgery, 4-1 Seiryo-machi, Aoba-ku, Sendai, Japan, 980-8575;
| | - Keiko Matsui
- Tohoku University Graduate School of Dentistry, Division of Oral and Maxillofacial Surgery, Sendai, Miyagi, Japan;
| | | | - Yushi Ezoe
- Tohoku University Graduate School of Dentistry, Division of Oral and Maxillofacial Surgery, Sendai, Japan;
| | - Tetsu Takahashi
- Tohoku University Graduate School of Dentistry, Division of Oral and Maxillofacial Surgery, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan, 980-8575;
| | - Shinji Kamakura
- Tohoku University, Graduate School of Biomedical Engineering, 2-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, Japan, 980-8574.,Japan;
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2
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Matsui K, Kawai T, Ezoe Y, Yanagisawa T, Takahashi T, Kamakura S. Segmental Bone Reconstruction by Octacalcium Phosphate Collagen Composites with Teriparatide. Tissue Eng Part A 2020; 27:561-571. [PMID: 32799756 PMCID: PMC8126423 DOI: 10.1089/ten.tea.2020.0150] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Octacalcium phosphate and collagen composite (OCPcol) demonstrated superior bone regeneration and has been commercialized recently in Japan. Teriparatide (TPTD) is a bioactive recombinant form of parathyroid hormone that is approved for osteoporosis treatment. Because mandibular bone reconstruction after segmental resection is a key clinical problem, it was examined whether single-dose local administration of OCPcol with TPTD can affect recovery after this procedure. OCPcol was prepared, and a commercially available hydroxyapatite and collagen composite (HAPcol) was used as a control. A 15 mm length segmental bone defect was made in the mandibular region of male beagle dogs. The experimental animals were divided in four groups. OCPcol treated with TPTD (OCPcol + TPTD), OCPcol, HAPcol treated with TPTD (HAPcol + TPTD), or HAPcol was implanted into the defect. The radiopaque areas of the implanted site were measured and statistically analyzed, and histological examination was performed after 6 months. The value of radiopaque area in total region of OCPcol + TPTD was highest (90.8 ± 7.3 mm2), followed in order by OCPcol (49.3 ± 21.8 mm2), HAPcol + TPTD (10.6 ± 2.3 mm2), and HAPcol (6.4 ± 2.3 mm2), and that of OCPcol + TPTD was significantly higher than that of HAPcol + TPTD or HAPcol. All segmented mandibles of OCPcol + TPTD and a part of those of OCPcol were bridged with newly formed bone, whereas no bone bridges were observed in HAPcol + TPTD or HAPcol. These results suggested that OCPcol treated with TPTD enabled bone reconstruction after segmental mandibular resection more than other three groups.
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Affiliation(s)
- Keiko Matsui
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Tadashi Kawai
- Division of Oral and Maxillofacial Surgery, School of Dentistry, Iwate Medical University, Morioka, Japan
| | - Yushi Ezoe
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Toshiki Yanagisawa
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Shinji Kamakura
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
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Yanagisawa T, Yasuda A, Makkonen RI, Kamakura S. Influence of pre-freezing conditions of octacalcium phosphate and collagen composite for reproducible appositional bone formation. J Biomed Mater Res B Appl Biomater 2020; 108:2827-2834. [PMID: 32239797 PMCID: PMC7496852 DOI: 10.1002/jbm.b.34613] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 03/02/2020] [Accepted: 03/19/2020] [Indexed: 02/01/2023]
Abstract
Even though conventionally prepared octacalcium phosphate and collagen composite (OCP/Col) has exhibited excellent bone regeneration and has recently been commercialized for treating bone defects, reproducible appositional bone formation with OCP/Col has never been achieved. The present study investigated whether appositional bone formation could be achieved by altering the density of OCP/Col and applying liquid nitrogen during the preparation of OCP/Col. The prepared OCP/Col disks had eight variations and were divided into categories according to four different type of densities (1.0, 1.3, 1.7, and 2.0) of OCP/Col and two different pre‐freezing conditions of gas phase (G group: −80°C) and liquid phase (L group: −196°C). These disks were implanted into subperiosteal pockets in rodent calvaria, five samples per each eight variations. Radiomorphometric analysis was conducted at 4 and 12 weeks after implantation, and histological analysis was conducted at 12 weeks after implantation. OCP/Col samples in the L group tended to retain their height and shape and had enhanced appositional bone formation, whereas OCP/Col samples in the G group tended to lose their height and shape and had limited appositional bone formation. The appositional bone formation increased along with growing density of OCP/Col, and L2.0 demonstrated higher appositional bone formation than other samples. These results suggest that the pre‐freezing conditions and densities of OCP/Col affect the appositional bone formation.
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Affiliation(s)
- Toshiki Yanagisawa
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
| | - Ayato Yasuda
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
| | - Ria I Makkonen
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan.,Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Shinji Kamakura
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
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Brunello G, Panda S, Schiavon L, Sivolella S, Biasetto L, Del Fabbro M. The Impact of Bioceramic Scaffolds on Bone Regeneration in Preclinical In Vivo Studies: A Systematic Review. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E1500. [PMID: 32218290 PMCID: PMC7177381 DOI: 10.3390/ma13071500] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 03/20/2020] [Accepted: 03/23/2020] [Indexed: 02/07/2023]
Abstract
Bioceramic scaffolds are appealing for alveolar bone regeneration, because they are emerging as promising alternatives to autogenous and heterogenous bone grafts. The aim of this systematic review is to answer to the focal question: in critical-sized bone defects in experimental animal models, does the use of a bioceramic scaffolds improve new bone formation, compared with leaving the empty defect without grafting materials or using autogenous bone or deproteinized bovine-derived bone substitutes? Electronic databases were searched using specific search terms. A hand search was also undertaken. Only randomized and controlled studies in the English language, published in peer-reviewed journals between 2013 and 2018, using critical-sized bone defect models in non-medically compromised animals, were considered. Risk of bias assessment was performed using the SYRCLE tool. A meta-analysis was planned to synthesize the evidence, if possible. Thirteen studies reporting on small animal models (six studies on rats and seven on rabbits) were included. The calvarial bone defect was the most common experimental site. The empty defect was used as the only control in all studies except one. In all studies the bioceramic materials demonstrated a trend for better outcomes compared to an empty control. Due to heterogeneity in protocols and outcomes among the included studies, no meta-analysis could be performed. Bioceramics can be considered promising grafting materials, though further evidence is needed.
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Affiliation(s)
- Giulia Brunello
- Department of Management and Engineering, University of Padova, Stradella San Nicola 3, 36100 Vicenza Italy; (G.B.); (L.B.)
- Section of Dentistry, Department of Neurosciences, University of Padova, Via Giustiniani 2, 35128 Padova, Italy; (L.S.); (S.S.)
| | - Sourav Panda
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Via Commenda 10, 20122 Milan, Italy;
- Department of Periodontics and Oral Implantology, Institute of Dental Sciences, Siksha O Anusandhan University, Bhubaneswar, 751003 Odisha, India
| | - Lucia Schiavon
- Section of Dentistry, Department of Neurosciences, University of Padova, Via Giustiniani 2, 35128 Padova, Italy; (L.S.); (S.S.)
| | - Stefano Sivolella
- Section of Dentistry, Department of Neurosciences, University of Padova, Via Giustiniani 2, 35128 Padova, Italy; (L.S.); (S.S.)
| | - Lisa Biasetto
- Department of Management and Engineering, University of Padova, Stradella San Nicola 3, 36100 Vicenza Italy; (G.B.); (L.B.)
| | - Massimo Del Fabbro
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Via Commenda 10, 20122 Milan, Italy;
- Dental Clinic, I.R.C.C.S. Orthopedic Institute Galeazzi, Via Galeazzi 4, 20161 Milan, Italy
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Yanagisawa T, Yasuda A, Makkonen RI, Kamakura S. Bone augmentation by octacalcium phosphate and collagen composite coated with poly-lactic acid cage. Clin Exp Dent Res 2020; 6:391-399. [PMID: 32187863 PMCID: PMC7453772 DOI: 10.1002/cre2.287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/27/2020] [Accepted: 02/28/2020] [Indexed: 12/02/2022] Open
Abstract
Objective Although octacalcium phosphate and collagen composite (OCP/Col) has demonstrated excellent bone regeneration, it has never achieved bone augmentation. The present study investigated whether it could be enabled by OCP/Col disks treated with parathyroid hormone (PTH) and covered with a poly‐lactic acid (PLA) cage. Materials and methods The prepared OCP/Col disks with three different types of PLA cages (no hole, one large hole, several small holes) were implanted into subperiosteal pockets in rodent calvaria. Histological, and histomorphometric analyses were conducted at 12 weeks after implantation. Results Implants with all PLA cage variants achieved sufficient bone augmentation, and analyses showed that new bone was formed from the original bone and along the PLA cage. While the PLA cage variant with no holes sporadically evoked new bone formation even at the central area of the roof of the PLA cage, the PLA cage variants with holes had no new bone in the area of the hole or beneath the periosteum. Conclusions These results suggest that sufficient bone augmentation could be achieved by treating the OCP/Col disks with PTH and covering them with a PLA cage, and periosteum might not have been involved in the bone formation in this experiment.
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Affiliation(s)
- Toshiki Yanagisawa
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
| | - Ayato Yasuda
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
| | - Ria I Makkonen
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan.,Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Shinji Kamakura
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
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Octacalcium phosphate collagen composite (OCP/Col) enhance bone regeneration in a rat model of skull defect with dural defect. Heliyon 2020; 6:e03347. [PMID: 32072051 PMCID: PMC7011046 DOI: 10.1016/j.heliyon.2020.e03347] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 11/12/2019] [Accepted: 01/30/2020] [Indexed: 11/29/2022] Open
Abstract
Cranial bone defects are a major issue in the field of neurosurgery, and improper management of such defects can cause cosmetic issues as well as more serious infections and inflammation. Several strategies exist to manage these defects clinically, but most rely on synthetic materials that are prone to complications; thus, a bone regenerative approach would be superior. We tested a material (octacalcium phosphate collagen composite [OCP/Col]) that is known to enhance bone regeneration in a skull defect model in rats. Using a critical-sized rat skull defect model, OCP/Col was implanted in rats with an intact dura or with a partial defect of the dura. The results were compared with those in a no-treatment group over the course of 12 weeks using computed tomographic and histological analysis. OCP/Col enhanced bone regeneration, regardless of whether there was a defect of the dura. OCP/Col can be used to treat skull defects, even when the dura is injured or removed surgically, via bone regeneration with enhanced resorption of OCP/Col, thus limiting the risk of infection greatly.
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Kawai T, Kamakura S, Matsui K, Fukuda M, Takano H, Iino M, Ishikawa S, Kawana H, Soma T, Imamura E, Kizu H, Michibata A, Asahina I, Miura K, Nakamura N, Kibe T, Suzuki O, Takahashi T. Clinical study of octacalcium phosphate and collagen composite in oral and maxillofacial surgery. J Tissue Eng 2020; 11:2041731419896449. [PMID: 32030119 PMCID: PMC6978823 DOI: 10.1177/2041731419896449] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 12/02/2019] [Indexed: 11/17/2022] Open
Abstract
Octacalcium phosphate and its collagen composite have been recognized as bone
substitute materials possessing osteoconductivity and biodegradation properties.
We evaluated the effectiveness of octacalcium phosphate and its collagen
composite used for bone augmentation in major oral and maxillofacial surgeries
in a clinical trial. Octacalcium phosphate and its collagen composite were used
in cases of sinus floor elevation in 1- and 2-stage, socket preservation, cyst,
and alveolar cleft procedures. A total of 60 patients were evaluated for
effectiveness after the implantation of octacalcium phosphate and its collagen
composite. Although sinus floor elevation in 1-stage, cyst, and alveolar cleft
cases met the criteria for the judgment of success, sinus floor elevation in
2-stage and socket preservation groups did not meet the criteria in the initial
evaluation. However, an additional evaluation for reconfirmation revealed the
effectiveness of octacalcium phosphate and its collagen composite in those
groups, and all evaluation results ultimately indicated the success of this
clinical trial. Therefore, this clinical trial suggested that application of
octacalcium phosphate and its collagen composite for oral and maxillofacial
surgery was safe and effective and that octacalcium phosphate and its collagen
composite could be a bone substitute candidate instead of autologous bone.
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Affiliation(s)
- Tadashi Kawai
- Department of Oral Medicine and Surgery, Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Shinji Kamakura
- Department of Bone Regenerative Engineering, Division of Regenerative and Biomedical Engineering, Tohoku University Graduate School of Biomedical Engineering, Sendai, Japan
| | - Keiko Matsui
- Department of Oral Medicine and Surgery, Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Masayuki Fukuda
- Department of Dentistry and Oral Surgery, Akita University Graduate School of Medicine, Akita, Japan
| | - Hiroshi Takano
- Department of Dentistry and Oral Surgery, Akita University Graduate School of Medicine, Akita, Japan
| | - Mitsuyoshi Iino
- Department of Dentistry, Oral and Maxillofacial-Plastic and Reconstructive Surgery, School of Medicine, Yamagata University, Yamagata, Japan
| | - Shigeo Ishikawa
- Department of Dentistry, Oral and Maxillofacial-Plastic and Reconstructive Surgery, School of Medicine, Yamagata University, Yamagata, Japan
| | - Hiromasa Kawana
- Department of Dentistry and Oral Surgery, Division of Oral and Maxillofacial Surgery, School of Medicine, Keio University, Tokyo, Japan.,Department of Oral and Maxillofacial Implantology, Kanagawa Dental University, Kanagawa, Japan
| | - Tomoya Soma
- Department of Dentistry and Oral Surgery, Division of Oral and Maxillofacial Surgery, School of Medicine, Keio University, Tokyo, Japan
| | - Eisaku Imamura
- Department of Oral and Maxillofacial Surgery, Yokohama General Hospital, Kanagawa, Japan
| | - Hideki Kizu
- Department of Dentistry and Oral Surgery, Tachikawa Hospital, Tachikawa, Japan
| | - Aya Michibata
- Department of Oral Surgery, Shizuoka City Shimizu Hospital, Shizuoka, Japan
| | - Izumi Asahina
- Department of Regenerative Oral Surgery, Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Keiichiro Miura
- Department of Regenerative Oral Surgery, Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Norifumi Nakamura
- Department of Oral and Maxillofacial Surgery, Field of Oral and Maxillofacial Rehabilitation, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Toshiro Kibe
- Department of Oral and Maxillofacial Surgery, Field of Oral and Maxillofacial Rehabilitation, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Osamu Suzuki
- Department of Craniofacial Engineering and Regeneration, Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Tetsu Takahashi
- Department of Oral Medicine and Surgery, Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
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J B, M M B, Chanda K. Evolutionary approaches in protein engineering towards biomaterial construction. RSC Adv 2019; 9:34720-34734. [PMID: 35530663 PMCID: PMC9074691 DOI: 10.1039/c9ra06807d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 10/01/2019] [Indexed: 11/29/2022] Open
Abstract
The tailoring of proteins for specific applications by evolutionary methods is a highly active area of research. Rational design and directed evolution are the two main strategies to reengineer proteins or create chimeric structures. Rational engineering is often limited by insufficient knowledge about proteins' structure-function relationships; directed evolution overcomes this restriction but poses challenges in the screening of candidates. A combination of these protein engineering approaches will allow us to create protein variants with a wide range of desired properties. Herein, we focus on the application of these approaches towards the generation of protein biomaterials that are known for biodegradability, biocompatibility and biofunctionality, from combinations of natural, synthetic, or engineered proteins and protein domains. Potential applications depend on the enhancement of biofunctional, mechanical, or other desired properties. Examples include scaffolds for tissue engineering, thermostable enzymes for industrial biocatalysis, and other therapeutic applications.
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Affiliation(s)
- Brindha J
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Chennai Campus Vandalur-Kelambakkam Road Chennai-600 127 Tamil Nadu India
| | - Balamurali M M
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Chennai Campus Vandalur-Kelambakkam Road Chennai-600 127 Tamil Nadu India
| | - Kaushik Chanda
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology Vellore-632014 Tamil Nadu India
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Tebyanian H, Norahan MH, Eyni H, Movahedin M, Mortazavi SJ, Karami A, Nourani MR, Baheiraei N. Effects of collagen/β-tricalcium phosphate bone graft to regenerate bone in critically sized rabbit calvarial defects. J Appl Biomater Funct Mater 2019; 17:2280800018820490. [PMID: 30832532 DOI: 10.1177/2280800018820490] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Bone defects remain a significant health issue and a major cause of morbidity in elderly patients. Composites based on collagen/calcium phosphate have been widely used for bone repair in clinical applications, owing to their comparability to bone extracellular matrix. This study aimed to evaluate the effects of a scaffold of collagen/calcium phosphate (COL/β-TCP) on bone formation to assess its potential use as a bone substitute to repair bone defects. Bilateral full-thickness critically sized calvarial defects (8 mm in diameter) were created in New Zealand white rabbits and treated with COL/β-TCP or COL scaffolds. One defect was also left unfilled as a control. Bone regeneration was assessed through histological evaluation using hematoxylin and eosin and Masson's trichrome staining after 4 and 8 weeks. Alizarin Red staining was also utilized to observe the mineralization process. Our findings indicated that COL/β-TCP implantation could better enhance bone regeneration than COL and exhibited both new bone growth and scaffold material degradation.
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Affiliation(s)
- Hamid Tebyanian
- 1 Research Center for Prevention of Oral and Dental Diseases, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | | | - Hossein Eyni
- 3 Department of Anatomical Science, faculty of medical sciences, Tarbiat Modares University, Tehran, Iran
| | - Mansoureh Movahedin
- 3 Department of Anatomical Science, faculty of medical sciences, Tarbiat Modares University, Tehran, Iran
| | - Sm Javad Mortazavi
- 4 Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Karami
- 1 Research Center for Prevention of Oral and Dental Diseases, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Nourani
- 5 Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Nafiseh Baheiraei
- 6 Tissue Engineering & Applied Cell Sciences Division, Department of hematology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Miura K, Sumita Y, Kajii F, Tanaka H, Kamakura S, Asahina I. First clinical application of octacalcium phosphate collagen composite on bone regeneration in maxillary sinus floor augmentation: A prospective, single‐arm, open‐label clinical trial. J Biomed Mater Res B Appl Biomater 2019; 108:243-252. [DOI: 10.1002/jbm.b.34384] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/22/2019] [Accepted: 03/24/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Kei‐ichiro Miura
- Department of Regenerative Oral SurgeryNagasaki University Graduate School of Biomedical Sciences Nagasaki Japan
| | - Yoshinori Sumita
- Basic and Translational Research Center for Hard Tissue DiseaseNagasaki University Graduate School of Biomedical Sciences Nagasaki Japan
| | | | | | - Shinji Kamakura
- Division of Bone Regenerative EngineeringTohoku University Graduate School of Biomedical Engineering Sendai Japan
| | - Izumi Asahina
- Department of Regenerative Oral SurgeryNagasaki University Graduate School of Biomedical Sciences Nagasaki Japan
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11
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Treatment of calvarial defects by resorbable and non-resorbable sonic activated polymer pins and mouldable titanium mesh in two dogs: a case report. BMC Vet Res 2018; 14:199. [PMID: 29929513 PMCID: PMC6013898 DOI: 10.1186/s12917-018-1506-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Accepted: 05/29/2018] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND To date, calvarial defects in dogs have traditionally been addressed with different types of implants including bone allograft, polymethylmethacrylate and titanium mesh secured with conventional metallic fixation methods. This report describes the use of an absorbable and non absorbable novel polymer fixation method, Bonewelding® technology, in combination with titanium mesh for the repair of calvarial defects in two dogs. The clinical outcomes and comparative complication using resorbable and non-resorbable thermoplastic pins were compared. CASE PRESENTATION This report of two cases documents the repair of a traumatic calvarial fracture in an adult male Greyhound and a cranioplasty following frontal bone tumor resection in an adult female Cavalier King Charles Spaniel with the use of a commercially available titanium mesh secured with an innovative thermoplastic polymer screw system (Bonewelding®). The treatment combination aimed to restore cranial structure, sinus integrity and cosmetic appearance. A mouldable titanium mesh was cut to fit the bone defect of the frontal bone and secured with either resorbable or non-resorbable polymer pins using Bonewelding® technology. Gentamycin-impregnated collagen sponge was used intraoperatively to assist with sealing of the frontal sinuses. Calvarial fracture and post-operative implant positioning were advised using computed tomography. A satisfactory restoration of skull integrity and cosmetic result was achieved, and long term clinical outcome was deemed clinically adequate with good patient quality of life. Postoperative complications including rostral mesh uplift with minor associated clinical signs were encountered when resorbable pins were used. No postoperative complications were experienced in non-resorbable pins at 7 months follow-up, by contrast mesh uplift was noted 3 weeks post-procedure in the case treated using absorbable pins. CONCLUSIONS The report demonstrates the innovative use of sonic-activated polymer pins (Bonewelding® technology) alongside titanium mesh is a suitable alternative technique for skull defect repair in dogs. The use of Bonewelding® may offer advantages in reduction of surgical time. Further, ultrasonic pin application may be less invasive than alternative metallic fixation and potentially reduces bone trauma. Polymer systems may offer enhanced mesh-bone integration when compared to traditional metallic implants. The use of polymer pins demonstrates initial potential as a fixation method in cranioplasty. Initial findings in a single case comparison indicate a possible advantage in the use of non-absorbable over the absorbable systems to circumvent complications associated with variable polymer degradation, further long term studies with higher patient numbers are required before reliable conclusions can be made.
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12
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Efficacy of Octacalcium Phosphate Collagen Composite for Titanium Dental Implants in Dogs. MATERIALS 2018; 11:ma11020229. [PMID: 29393874 PMCID: PMC5848926 DOI: 10.3390/ma11020229] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 01/25/2018] [Accepted: 01/30/2018] [Indexed: 12/02/2022]
Abstract
Background: Previous studies showed that octacalcium (OCP) collagen composite (OCP/Col) can be used to repair human jaw bone defects without any associated abnormalities. The present study investigated whether OCP/Col could be applied to dental implant treatment using a dog tooth extraction socket model. Methods: The premolars of dogs were extracted; each extraction socket was extended, and titanium dental implants were placed in each socket. OCP/Col was inserted in the space around a titanium dental implant. Autologous bone was used to fill the other sockets, while the untreated socket (i.e., no bone substitute material) served as a control. Three months after the operation, these specimens were analyzed for the osseointegration of each bone substitute material with the surface of the titanium dental implant. Results: In histomorphometric analyses, the peri-implant bone areas (BA%) and bone-implant contact (BIC%) were measured. There was no difference in BA% or BIC% between OCP/Col and autologous bone. Conclusion: These results suggested that OCP/Col could be used for implant treatment as a bone substitute.
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Kajii F, Iwai A, Tanaka H, Matsui K, Kawai T, Kamakura S. Influence of electron beam irradiation doses on bone regeneration by octacalcium phosphate collagen composites. J Tissue Eng Regen Med 2017. [DOI: 10.1002/term.2505] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Fumihiko Kajii
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical EngineeringTohoku University Sendai Japan
- Toyobo Co. Ltd, Research Institute Shiga Japan
| | | | | | - Keiko Matsui
- Division of Oral and Maxillofacial SurgeryTohoku University Graduate School of Dentistry Sendai Japan
| | - Tadashi Kawai
- Division of Oral and Maxillofacial SurgeryTohoku University Graduate School of Dentistry Sendai Japan
| | - Shinji Kamakura
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical EngineeringTohoku University Sendai Japan
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Kim BS, Yang SS, Lee J. Precoating of biphasic calcium phosphate bone substitute with atelocollagen enhances bone regeneration through stimulation of osteoclast activation and angiogenesis. J Biomed Mater Res A 2017; 105:1446-1456. [PMID: 28177580 DOI: 10.1002/jbm.a.36032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 02/03/2017] [Indexed: 11/09/2022]
Abstract
Type I collagen (Col) is a naturally polymerizing protein and important extracellular matrix bone component. The aim of this study was to improve bone regeneration capacity by precoating the surface of biphasic calcium phosphate (BCP) granules with AT-Col, and evaluating its biological effects. BCP granules were precoated with AT-Col using adsorption and lyophilization method. Morphology of AT-Col precoated surfaces was observed using scanning electron microscopy (SEM). Biocompatibility and osteogenic activity of AT-Col were determined in vitro with human mesenchymal stem cell (hMSCs). In vivo bone healing efficiency and related biological effects were determined using a rabbit calvarial defect model. SEM results revealed numerous irregularly distributed AT-Col polymer clusters on BCP granule surface. Biocompatibility experiments demonstrated that AT-Col was non-cytotoxic, and that cell proliferation, adhesion, and osteogenic activity were improved by AT-Col precoating. After in vivo surgical implantation into bone defects, new bone formation was improved by AT-Col granule precoating. Specifically, 8 weeks post-surgery, percentage bone volume was significantly higher in AT-Col/BCP animals (35.02 ± 1.89%) compared with BCP-treated animals (8.94 ± 1.47%) (p < 0.05). Furthermore, tartrate-resistant acid phosphatase staining and CD31 immunohistochemical staining revealed that osteoclast activation and new blood vessel formation in vivo were also induced by AT-Col precoating. Collectively, these data indicate that AT-Col/BCP may be potentially used as a bone substitute to enable effective bone regeneration through enhanced new blood vessel formation and osteoclast activation. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 1446-1456, 2017.
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Affiliation(s)
- Beom-Su Kim
- Bonecell Biotech Inc, Dunsan-dong, Seo-gu, Daejeon, 302-830, Republic of Korea.,Wonkwang Bone Regeneration Research Institute, Wonkwang University, Iksan, 570-749, Republic of Korea
| | - Sun-Sik Yang
- Wonkwang Bone Regeneration Research Institute, Wonkwang University, Iksan, 570-749, Republic of Korea
| | - Jun Lee
- Bonecell Biotech Inc, Dunsan-dong, Seo-gu, Daejeon, 302-830, Republic of Korea.,Wonkwang Bone Regeneration Research Institute, Wonkwang University, Iksan, 570-749, Republic of Korea.,Department of Oral and Maxillofacial Surgery, Daejeon Dental Hospital, College of Dentistry, Wonkwang University, 302-830, Republic of Korea
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Kanda N, Matsui K, Kawai T, Edamatsu H, Tanuma Y, Suzuki O, Takahashi T, Kamakura S. Implantation of octacalcium phosphate collagen composites (OCP/Col) after extraction of canine deciduous teeth achieved undisturbed permanent tooth eruption. Arch Oral Biol 2016; 72:179-186. [DOI: 10.1016/j.archoralbio.2016.08.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Revised: 08/11/2016] [Accepted: 08/23/2016] [Indexed: 11/25/2022]
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Kawai T, Tanuma Y, Matsui K, Suzuki O, Takahashi T, Kamakura S. Clinical safety and efficacy of implantation of octacalcium phosphate collagen composites in tooth extraction sockets and cyst holes. J Tissue Eng 2016; 7:2041731416670770. [PMID: 27757220 PMCID: PMC5051665 DOI: 10.1177/2041731416670770] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 09/01/2016] [Indexed: 11/16/2022] Open
Abstract
It was demonstrated that octacalcium phosphate collagen composite achieved notable bone regeneration in bone defects in preclinical studies. On the basis of the research results, an investigator-initiated exploratory clinical trial was conducted after approval from a local Institutional Review Board. This clinical study was performed as a single-arm non-randomized intervention study. Octacalcium phosphate collagen composite was implanted into a total of 10 cases of alveolar bone defects after tooth extractions and cystectomy. Safety assessment was performed in terms of the clinical course and several consecutive laboratory examinations, and sequential radiographs were used for efficacy assessment. All participants uneventfully completed the clinical trial without major problems in their general condition. Postoperative wound swelling was observed, as also commonly seen in tooth extraction or cystectomy. Although no serious liver dysfunction, renal dysfunction, electrolyte imbalance, or abnormal urinalysis results were recognized, the number of white blood cells and C-reactive protein level temporarily increased after the operation. An increase in radiopacity in the octacalcium phosphate collagen composite–implanted site was observed in all cases. Finally, the border between the original bone and the octacalcium phosphate collagen composite–implanted site became indistinguishable. These results suggest that octacalcium phosphate collagen composite could be utilized safely in clinical situations in the future.
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Affiliation(s)
- Tadashi Kawai
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Yuji Tanuma
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Keiko Matsui
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Shinji Kamakura
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
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Kawai T, Suzuki O, Matsui K, Tanuma Y, Takahashi T, Kamakura S. Octacalcium phosphate collagen composite facilitates bone regeneration of large mandibular bone defect in humans. J Tissue Eng Regen Med 2015; 11:1641-1647. [DOI: 10.1002/term.2110] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 09/25/2015] [Accepted: 10/15/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Tadashi Kawai
- Division of Oral and Maxillofacial Surgery, Department of Oral Medicine and Surgery; Tohoku University Graduate School of Dentistry; Sendai Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering; Tohoku University Graduate School of Dentistry; Sendai Japan
| | - Keiko Matsui
- Division of Oral and Maxillofacial Surgery, Department of Oral Medicine and Surgery; Tohoku University Graduate School of Dentistry; Sendai Japan
| | - Yuji Tanuma
- Division of Oral and Maxillofacial Surgery, Department of Oral Medicine and Surgery; Tohoku University Graduate School of Dentistry; Sendai Japan
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial Surgery, Department of Oral Medicine and Surgery; Tohoku University Graduate School of Dentistry; Sendai Japan
| | - Shinji Kamakura
- Bone Regenerative Engineering Laboratory, Graduate School of Biomedical Engineering; Tohoku University; Sendai Japan
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Kawai T, Echigo S, Matsui K, Tanuma Y, Takahashi T, Suzuki O, Kamakura S. First clinical application of octacalcium phosphate collagen composite in human bone defect. Tissue Eng Part A 2014; 20:1336-41. [PMID: 24294829 DOI: 10.1089/ten.tea.2013.0508] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We have previously demonstrated that octacalcium phosphate (OCP) collagen composite (OCP/collagen) promotes bone regeneration in a critical-sized bone defect of a rodent or canine model. This study was designed to investigate the bone regeneration of OCP/collagen in human bone defect as a first clinical trial. Two patients who had a radicular cyst or apical periodontitis consented to participate in our clinical study, and OCP/collagen was implanted into the defects after operation. Radiographic examination showed effective bone healing in each bone defect at 3 or 6 months. Likewise, computed tomography value significantly increased after implantation. Postoperative wound healing was uneventful, and neither infection nor allergic reaction against OCP/collagen was observed for the entire period. This study demonstrated that OCP/collagen would be safely used and enhanced bone regeneration in human bone defects. To reinforce the efficacy of OCP/collagen as a bone substitute material, it should be compared with other suitable comparators in the future.
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Affiliation(s)
- Tadashi Kawai
- 1 Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry , Sendai, Japan
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NISHIKAWA R, ANADA T, ISHIKO-UZUKA R, SUZUKI O. Osteoblastic differentiation of stromal ST-2 cells from octacalcium phosphate exposure via p38 signaling pathway. Dent Mater J 2014; 33:242-51. [DOI: 10.4012/dmj.2013-226] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Recent developments of functional scaffolds for craniomaxillofacial bone tissue engineering applications. ScientificWorldJournal 2013; 2013:863157. [PMID: 24163634 PMCID: PMC3791836 DOI: 10.1155/2013/863157] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 07/14/2013] [Indexed: 12/15/2022] Open
Abstract
Autogenous bone grafting remains a gold standard for the reconstruction critical-sized bone defects in the craniomaxillofacial region. Nevertheless, this graft procedure has several disadvantages such as restricted availability, donor-site morbidity, and limitations in regard to fully restoring the complicated three-dimensional structures in the craniomaxillofacial bone. The ultimate goal of craniomaxillofacial bone reconstruction is the regeneration of the physiological bone that simultaneously fulfills both morphological and functional restorations. Developments of tissue engineering in the last two decades have brought such a goal closer to reality. In bone tissue engineering, the scaffolds are fundamental, elemental and mesenchymal stem cells/osteoprogenitor cells and bioactive factors. A variety of scaffolds have been developed and used as spacemakers, biodegradable bone substitutes for transplanting to the new bone, matrices of drug delivery system, or supporting structures enhancing adhesion, proliferation, and matrix production of seeded cells according to the circumstances of the bone defects. However, scaffolds to be clinically completely satisfied have not been developed yet. Development of more functional scaffolds is required to be applied widely to cranio-maxillofacial bone defects. This paper reviews recent trends of scaffolds for crania-maxillofacial bone tissue engineering, including our studies.
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Suzuki O. Octacalcium phosphate (OCP)-based bone substitute materials. JAPANESE DENTAL SCIENCE REVIEW 2013. [DOI: 10.1016/j.jdsr.2013.01.001] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Suzuki O, Anada T. Synthetic octacalcium phosphate: a possible carrier for mesenchymal stem cells in bone regeneration. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2013; 2013:397-400. [PMID: 24109707 DOI: 10.1109/embc.2013.6609520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The present paper reviews biomaterial studies of synthetic octacalcium phosphate (OCP) as a scaffold of osteoblastic cells. OCP crystals have been suggested to be one of precursor phases in hydroxyapatite (HA) crystal formation in bone and tooth. The recent intensive biomaterials and tissue engineering studies using synthetic OCP disclosed the potential function of OCP as a bioactive material as well as synthetic HA materials due to its highly osteoconductive and biodegradable properties. In vitro studies showed that OCP crystals exhibit a positive effect on osteoblastic cell differentiation. In vivo studies confirmed that the materials of OCP in a granule forms and OCP-based composite materials with natural polymers, such as gelatin and collagen, enhance bone regeneration if implanted in various model bone defects with critical-sized diameters, defined as a defect which does not heal spontaneously throughout the lifetime of the animals. One of particular characteristics of OCP, found as a mechanism to enhance bone regeneration in vivo, is a process of progressive conversion from OCP to HA at physiological conditions. The OCP-HA conversion is accompanied by progressive physicochemical changes of the material properties, which affects the tissue reaction around the crystals where osteoblastic cells are encountered. Mesenchymal stem cells (MSCs) seeded in an OCP-based material enhanced bone regeneration in the rat critical-sized calvaria defect more than that by the material alone. The overall results reveal that OCP crystals have an effect on osteoblastic cell differentiation including the differentiation of MSCs in vivo. The evidence collected experimentally in the laboratory was presented.
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Tanuma Y, Matsui K, Kawai T, Matsui A, Suzuki O, Kamakura S, Echigo S. Comparison of bone regeneration between octacalcium phosphate/collagen composite and β-tricalcium phosphate in canine calvarial defect. Oral Surg Oral Med Oral Pathol Oral Radiol 2013; 115:9-17. [DOI: 10.1016/j.oooo.2011.12.029] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Accepted: 12/28/2011] [Indexed: 11/28/2022]
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Miura K, Matsui K, Kawai T, Kato Y, Matsui A, Suzuki O, Kamakura S, Echigo S. Octacalcium phosphate collagen composites with titanium mesh facilitate alveolar augmentation in canine mandibular bone defects. Int J Oral Maxillofac Surg 2012; 41:1161-9. [PMID: 22727604 DOI: 10.1016/j.ijom.2012.05.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 02/21/2012] [Accepted: 05/16/2012] [Indexed: 10/28/2022]
Abstract
This study was designed to investigate whether bone regeneration by implantation of octacalcium phosphate and porcine atelocollagen composite (OCP/Col) would be enhanced if mechanical stress to the implanted OCP/Col were alleviated. OCP/Col discs were implanted into an arc-shaped mandibular defect in male adult beagle dogs divided into untreated, OCP/Col, and OCP/Col/Mesh groups. In the OCP/Col/Mesh group, mechanical stress towards the implanted OCP/Col was alleviated by a titanium mesh. Bone regeneration in the three groups was compared after 6 months. Macroscopically, the alveolus in the OCP/Col/Mesh group was augmented vertically more than in the other two groups. Morphometric analysis by micro-CT showed the bone volume in the OCP/Col/Mesh group was significantly greater than in the other two groups. The augmented alveolus in the OCP/Col/Mesh group consisted of outer cortical and inner cancellous structure. Histologically, the OCP/Col/Mesh-treated alveolus was augmented by matured bone tissue along the inside of the titanium mesh. The implanted OCP/Col in the OCP/Col/Mesh and OCP/Col groups had almost disappeared. These results indicated that vertical bone regeneration by OCP/Col was efficient and successful when the mechanical stress to the implanted OCP/Col was alleviated. OCP/Col should be a useful bone substitute with active structural reconstitution.
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Affiliation(s)
- K Miura
- Department of Regenerative Oral Surgery, Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Japan
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Iibuchi S, Matsui K, Kawai T, Sasaki K, Suzuki O, Kamakura S, Echigo S. Octacalcium phosphate (OCP) collagen composites enhance bone healing in a dog tooth extraction socket model. Int J Oral Maxillofac Surg 2010; 39:161-8. [DOI: 10.1016/j.ijom.2009.12.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Revised: 09/30/2009] [Accepted: 12/07/2009] [Indexed: 10/20/2022]
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