1
|
Zhang Q, Wang X, Yang M, Xu D. Effects of void defects on the mechanical properties of biphasic calcium phosphate nanoparticles: A molecular dynamics investigation. J Mech Behav Biomed Mater 2024; 151:106385. [PMID: 38246094 DOI: 10.1016/j.jmbbm.2024.106385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/23/2024]
Abstract
Porous biphasic calcium phosphate (BCP) ceramics are widely used in bone tissue engineering, and the mechanical properties of BCP implants must be reliable. However, the effects of pore structure (e.g., shape and size) on the mechanical properties are not well understood. In this study, we used molecular dynamics simulations to investigate the influence of pore shape and size on the mechanical behavior of BCP nanoparticles. BCP void models with cylindrical and cuboid pores ranging from 2 to 16 nm in diameter were constructed, and the elastic moduli were calculated. In addition, uniaxial tensile and compressive tests were performed on the models. We found that the pore size had a more significant impact on the mechanical properties of BCP than pore shape. Further, the elastic moduli decreased nonlinearly with increasing pore size. In addition, the tensile and compressive strength also decreased with the increase in pore size, but the ductility improved. Furthermore, deformation and fracture were more likely to occur near the pores and at the phase interfaces as a result of high atomic local strain in the calcium-deficient hydroxyapatite area. The results of this work reveal the effects of pore parameters on the mechanical properties of porous BCP at the nanometer level, which may aid the design of improved porous and multiphase CaP-based biomaterials for bone regeneration.
Collapse
Affiliation(s)
- Qiao Zhang
- MOE Key Laboratory of Green Chemistry and Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Xin Wang
- MOE Key Laboratory of Green Chemistry and Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Mingli Yang
- College of Biomedical Engineering, Sichuan University, Chengdu 610064, China; Research Center for Materials Genome Engineering, Sichuan University, Chengdu 610065, China.
| | - Dingguo Xu
- MOE Key Laboratory of Green Chemistry and Technology, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China; Research Center for Materials Genome Engineering, Sichuan University, Chengdu 610065, China.
| |
Collapse
|
2
|
Hayashi K, Yanagisawa T, Kishida R, Tsuchiya A, Ishikawa K. Gear-shaped carbonate apatite granules with a hexagonal macropore for rapid bone regeneration. Comput Struct Biotechnol J 2023; 21:2514-2523. [PMID: 37077175 PMCID: PMC10106487 DOI: 10.1016/j.csbj.2023.03.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 03/31/2023] [Accepted: 03/31/2023] [Indexed: 04/08/2023] Open
Abstract
Synthetic bone grafts are in high demand owing to increased age-related bone disorders in the global aging population. Here, we report fabrication of gear-shaped granules (G-GRNs) for rapid bone healing. G-GRNs possessed six protrusions and a hexagonal macropore in the granular center. These were composed of carbonate apatite, i.e., bone mineral, microspheres with ∼1-μm micropores in the spaces between the microspheres. G-GRNs formed new bone and blood vessels (both on the granular surface and within the macropores) 4 weeks after implantation in the rabbit femur defects. The formed bone structure was similar to that of cancellous bone. The bone percentage in the defect recovered to that in a normal rabbit femur at week-4 post-implantation, and the bone percentage remained constant for the following 8 weeks. Throughout the entire period, the bone percentage in the G-GRN-implanted group was ∼10% higher than that of the group implanted with conventional carbonate apatite granules. Furthermore, a portion of the G-GRNs resorbed at week-4, and resorption continued for the following 8 weeks. Thus, G-GRNs are involved in bone remodeling and are gradually replaced with new bone while maintaining a suitable bone level. These findings provide a basis for the design and fabrication of synthetic bone grafts for achieving rapid bone regeneration.
Collapse
|
3
|
Two-step strategy for constructing hierarchical pore structured chitosan–hydroxyapatite composite scaffolds for bone tissue engineering. Carbohydr Polym 2021; 260:117765. [DOI: 10.1016/j.carbpol.2021.117765] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 12/04/2020] [Accepted: 02/02/2021] [Indexed: 12/19/2022]
|
4
|
Ortiz-Puigpelat O, Simões A, Caballé-Serrano J, Hernández-Alfaro F. Blood absorption capacity of different xenograft bone substitutes. An in-vitro study. J Clin Exp Dent 2019; 11:e1018-e1024. [PMID: 31700576 PMCID: PMC6825731 DOI: 10.4317/jced.56317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 10/07/2019] [Indexed: 11/25/2022] Open
Abstract
Background Commercially available xenograft blocks, claim to have adequate characteristics to interact with biological media and thus permitting biological fluid absorption. The objective of this in vitro study was to compare the blood absorption capacity of four different xenograft block materials of different composition of collagen and porosity. Material and Methods Four brands of xenograft block materials were used (NuOss®, Bio-Oss®, Osteobiol® and Smartbone®). Five samples of each brand were analyzed, making a total of 20 tests. Human blood was used as the absorption liquid for the present experiment. The time period, in which the block remains in contact with the blood, was registered at 30 seconds (T1), 60 seconds (T2) and 5 minutes (T3). The xenograft blocks were evaluated according to their absorption capacity. Results The absorption capacity of the different biomaterials were statistical significant different (p<0,001) at T1, T2 and T3 time points. At 30 seconds, Smartbone® absorbed significantly less blood than NuOss® and Bio-Oss®, however, without differences comparing with Osteobiol®. The NuOss®, Bio-Oss® and Osteobiol® did not register any significant difference between them. At 60 seconds, the Smartbone® absorbed significantly less blood than the other biomaterials. Conclusions The NuOss® was significantly superior than Osteobiol®, but without differences relatively with Bio-Oss®. Also the Bio-Oss® and Osteobiol® did not register any difference between them. At 5 minutes, the Smatbone® continued to significantly absorbed less blood than any other biomaterial, nevertheless, NuOss®, Bio-Oss® and Osteobiol® not register again any significant difference between them. Despite of small sample size, it can be concluded that NuOss® was superior, in terms of blood absorption capacity, comparing with the other block biomaterials at 30 seconds, 60 seconds and 5 minutes. However, more investigation in a clinical setting are needed to know the clinical implications of the absorption capacity of such biomaterials. Key words:Blood absorption, osteoconduction, xenograft, bone regeneration.
Collapse
Affiliation(s)
- Octavi Ortiz-Puigpelat
- Assistant Professor Department of Oral and Maxillofacial Surgery. Universitat Internacional de Catalunya. Director of Clínica Dental Ortiz-Puigpelat. Barcelona, Spain
| | - Andreia Simões
- DDS, MS. Resident Student of Department of Oral and Maxillofacial Surgery. Universitat Internacional de Catalunya
| | - Jordi Caballé-Serrano
- DDS, MS, PhD. Assistant Professor Department of Oral and Maxillofacial Surgery. Universitat Internacional de Catalunya
| | - Federico Hernández-Alfaro
- MD, DDS, PhD, FEBOMS. Professor & Chairman Department of Oral & Maxillofacial Surgery. Universitat Internacional de Catalunya. Director InstitutoMaxilofacial. Teknon Medical Center
| |
Collapse
|
5
|
Elshaer A, Nair S, Hassanin H. Near Net Shape Manufacturing of Dental Implants Using Additive Processes. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/978-3-030-10579-2_4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
|
6
|
Pei X, Ma L, Zhang B, Sun J, Sun Y, Fan Y, Gou Z, Zhou C, Zhang X. Creating hierarchical porosity hydroxyapatite scaffolds with osteoinduction by three-dimensional printing and microwave sintering. Biofabrication 2017; 9:045008. [PMID: 28976356 DOI: 10.1088/1758-5090/aa90ed] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hierarchical porosity, which includes micropores and macropores in scaffolds, contributes to important multiple biological functions for tissue regeneration. This paper introduces a two-step method of combining three-dimensional printing (3DP) and microwave sintering to fabricate two-level hierarchical porous scaffolds. The results showed that 3D printing made the macroporous structure well-controlled and microwave sintering generated micropores on the macropore surface. The resulting hierarchical macro/microporous hydroxyapatite scaffold induced bone formation following intramuscular implantation. Moreover, when comparing the hierarchical macro/microporous hydroxyapatite scaffold to the non-osteoinductive hydroxyapatite scaffolds (either 3D printed or H2O2 foamed) subjected to muffle sintering which do not have micropores, the critical role of micropores in material-driven bone formation was shown. The findings presented herein could be useful for the further optimization of bone grafting materials for bone regeneration.
Collapse
Affiliation(s)
- Xuan Pei
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, People's Republic of China
| | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Shao RX, Quan RF, Huang XL, Wang T, Xie SJ, Gao HH, Wei XC, Yang DS. Evaluation of porous gradient hydroxyapatite/zirconia composites for repair of lumbar vertebra defect in dogs. J Biomater Appl 2016; 30:1312-21. [PMID: 26809701 DOI: 10.1177/0885328215627616] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective To evaluate the effects of porous gradient composites with hydroxyapatite/zirconia and autologous iliac in repair of lumbar vertebra body defects in dogs. Methods (1) New porous gradient hydroxyapatite/zirconia composites were prepared using foam immersion, gradient compound and high temperature sintering; (2) A total of 18 adult beagle dogs, aged five to eight months and weighted 10–13 kg, were randomly assigned into two subgroups, which were implanted with new porous gradient hydroxyapatite/zirconia composites (subgroup A in 12) or autologous iliac bone (subgroup B in 6); (3) The post-operative data were analyzed and compared between the subgroups to repair the vertebral body defect by roentgenoscopy, morphology and biomechanics. Results The porosity of new porous gradient hydroxyapatite/zirconia composites is at 25 poles per inch, and the size of pores is at between 150 and 300 µm. The post-operative roentgenoscopy displayed that new-bone formation is increased gradually, and the interface between composites and host-bone becomes became blur, and the new-bone around the composites were integrated into host-bone at 24 weeks postoperatively in subgroup A. As to subgroup B, the resorption and restructure were found at six weeks after the surgery, and the graft-bone and host-bone have been integrated completely without obvious boundary at 24 weeks postoperatively. Histomorphologic study showed that the amount of bone within pores of the porous gradient hydroxyapatite/zirconia composites increased continuously with a prolonged implantation time, and that partial composites were degradated and replaced by new-bone trabeculae. There was no significant difference between subgroups ( P > 0.05) in the ultimate compressive strengths. Conclusion New porous gradient hydroxyapatite/zirconia composites can promote the repair of bony defect, and induce bone tissue to ingrow into the pores, which may be applied widely to the treatment of bony defect in the future.
Collapse
Affiliation(s)
- Rong-Xue Shao
- Research Institute of Orthopedics, Zhejiang Chinese Medical University, Zhejiang, China
| | - Ren-Fu Quan
- Department of Orthopedics, Xiaoshan Traditional Chinese Medical Hospital, Zhejiang, China
| | - Xiao-Long Huang
- Research Institute of Orthopedics, Zhejiang Chinese Medical University, Zhejiang, China
| | - Tuo Wang
- Research Institute of Orthopedics, Zhejiang Chinese Medical University, Zhejiang, China
| | - Shang-Ju Xie
- Department of Orthopedics, Xiaoshan Traditional Chinese Medical Hospital, Zhejiang, China
| | - Huan-Huan Gao
- Yunnan University of Traditional Chinese Medicine, YunNan, China
| | - Xi-Cheng Wei
- School of Materials Science and Engineering, Shanghai University, Shanghai, China
| | - Di-Sheng Yang
- Department of Orthopedics, The Second Affiliated Hospital, Medical College of Zhejiang University, Hangzhou, China
| |
Collapse
|
8
|
Yang DJ, Jeon JH, Lee SY, An HW, Park KO, Park KB, Kim S. Effects of Collagen Grafting on Cell Behaviors in BCP Scaffold with Interconnected Pore Structure. Biomater Res 2016; 20:3. [PMID: 26779345 PMCID: PMC4714428 DOI: 10.1186/s40824-016-0049-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 01/04/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND This study was to investigate the effect of collagen grafted porous biphasic calcium phosphate (BCP) on cell attachment, proliferation, and differentiation. Porous BCP scaffolds with interconnected micropore structure were prepared with were prepared and then grafted with a collagen type I. The hydroxyapatite (HA) and β-tricalcium phosphate (TCP) ratio of the TCP scaffolds was about 60/40 and the collagen was crosslinked on the TCP scaffold surface (collagen-TCP). RESULTS The sintered BCP scaffolds showed fully interconnected micropore structures with submicron-sized grains. The collagen crosslinking in the scaffolds was conducted using the the N-(3-Dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide (NHS) crosslinking method. The cell proliferation of collagen-BCP scaffolds showed a similar result to that of the BCP scaffolds. However, osteoblastic differentiation and cell attachment increased in the collagen-BCP scaffolds. CONCLUSIONS Collagen-BCP scaffold improved the cell attachment ability in early phase and osteoblastic differentiation.
Collapse
Affiliation(s)
- Dong-Jun Yang
- Department of Institute of Science & Technology, Megagen Implant, Jain-myeon, Gyeongsan, Gyeongbuk 712-852 Korea
| | - Jae-Hui Jeon
- School of Materials Science & Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 712-749 Korea
| | - Sun-Young Lee
- Department of Institute of Science & Technology, Megagen Implant, Jain-myeon, Gyeongsan, Gyeongbuk 712-852 Korea
| | - Hyun-Wook An
- Department of Institute of Science & Technology, Megagen Implant, Jain-myeon, Gyeongsan, Gyeongbuk 712-852 Korea
| | - Keun Oh Park
- Department of Institute of Science & Technology, Megagen Implant, Jain-myeon, Gyeongsan, Gyeongbuk 712-852 Korea
| | - Kwang-Bum Park
- Department of Institute of Science & Technology, Megagen Implant, Jain-myeon, Gyeongsan, Gyeongbuk 712-852 Korea
| | - Sukyoung Kim
- School of Materials Science & Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 712-749 Korea
| |
Collapse
|
9
|
Prakasam M, Locs J, Salma-Ancane K, Loca D, Largeteau A, Berzina-Cimdina L. Fabrication, Properties and Applications of Dense Hydroxyapatite: A Review. J Funct Biomater 2015; 6:1099-140. [PMID: 26703750 PMCID: PMC4695913 DOI: 10.3390/jfb6041099] [Citation(s) in RCA: 151] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 12/05/2015] [Accepted: 12/09/2015] [Indexed: 02/04/2023] Open
Abstract
In the last five decades, there have been vast advances in the field of biomaterials, including ceramics, glasses, glass-ceramics and metal alloys. Dense and porous ceramics have been widely used for various biomedical applications. Current applications of bioceramics include bone grafts, spinal fusion, bone repairs, bone fillers, maxillofacial reconstruction, etc. Amongst the various calcium phosphate compositions, hydroxyapatite, which has a composition similar to human bone, has attracted wide interest. Much emphasis is given to tissue engineering, both in porous and dense ceramic forms. The current review focusses on the various applications of dense hydroxyapatite and other dense biomaterials on the aspects of transparency and the mechanical and electrical behavior. Prospective future applications, established along the aforesaid applications of hydroxyapatite, appear to be promising regarding bone bonding, advanced medical treatment methods, improvement of the mechanical strength of artificial bone grafts and better in vitro/in vivo methodologies to afford more particular outcomes.
Collapse
Affiliation(s)
- Mythili Prakasam
- CNRS, Université de Bordeaux, ICMCB, 87 avenue du Dr. A. Schweitzer, Pessac F-33608, France; E-Mail:
| | - Janis Locs
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, Riga LV-1007, Latvia; E-Mails: (J.L.); (K.S.-A.); (D.L.); (L.B.-C.)
| | - Kristine Salma-Ancane
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, Riga LV-1007, Latvia; E-Mails: (J.L.); (K.S.-A.); (D.L.); (L.B.-C.)
| | - Dagnija Loca
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, Riga LV-1007, Latvia; E-Mails: (J.L.); (K.S.-A.); (D.L.); (L.B.-C.)
| | - Alain Largeteau
- CNRS, Université de Bordeaux, ICMCB, 87 avenue du Dr. A. Schweitzer, Pessac F-33608, France; E-Mail:
| | - Liga Berzina-Cimdina
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, Riga LV-1007, Latvia; E-Mails: (J.L.); (K.S.-A.); (D.L.); (L.B.-C.)
| |
Collapse
|
10
|
Bone regeneration of macropore octacalcium phosphate-coated deproteinized bovine bone materials in sinus augmentation: a prospective pilot study. IMPLANT DENT 2015; 24:275-80. [PMID: 25886841 DOI: 10.1097/id.0000000000000249] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To investigate the osteogenic potential of macropore octacalcium phosphate (OCP)-coated deproteinized bovine bone materials (DBBMs) in sinus augmentation. STUDY DESIGN Macropore OCP-coated DBBM was manufactured from bovine bone by thermal and chemical processing. Sinus grafts of a lateral window approach with experimental bone were conducted in 10 patients. At 6 months after surgery, a total of 10 specimens were obtained from 10 patients. But, 4 of them were excluded because the amount of specimens was not enough for evaluation. Morphological investigation under scanning electron microscopy and histological evaluation were performed. RESULTS OCP was evenly attached to the surface of the experimental graft and showed a relatively large pore size (300-400 μm) compared with Bio-Oss (100-200 μm). New bone comprised 23.49% (± 0.10), and residual graft material comprised 15.39% (± 0.06) in bone specimens. CONCLUSION A macropore-sized design and OCP coating could present a favorable environment for new bone formation in maxillary sinus grafts.
Collapse
|
11
|
Tamimi F, Torres J, Al-Abedalla K, Lopez-Cabarcos E, Alkhraisat MH, Bassett DC, Gbureck U, Barralet JE. Osseointegration of dental implants in 3D-printed synthetic onlay grafts customized according to bone metabolic activity in recipient site. Biomaterials 2014; 35:5436-45. [DOI: 10.1016/j.biomaterials.2014.03.050] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 03/20/2014] [Indexed: 10/25/2022]
|
12
|
Wang J, Yan H, Chen T, Wang Y, Li H, Zhi W, Feng B, Weng J, Zhu M. Porous nanoapatite scaffolds synthesized using an approach of interfacial mineralization reaction and their bioactivity. J Biomed Mater Res B Appl Biomater 2014; 102:1749-61. [DOI: 10.1002/jbm.b.33159] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 03/06/2014] [Accepted: 03/13/2014] [Indexed: 01/18/2023]
Affiliation(s)
- Jianxin Wang
- Key Laboratory of Advanced Technologies of Materials; Ministry of Education, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
- School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
| | - Haoran Yan
- School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
| | - Taijun Chen
- School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
| | - Yingying Wang
- School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
| | - Huiyong Li
- School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
| | - Wei Zhi
- School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
| | - Bo Feng
- Key Laboratory of Advanced Technologies of Materials; Ministry of Education, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
- School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
| | - Jie Weng
- Key Laboratory of Advanced Technologies of Materials; Ministry of Education, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
- School of Materials Science and Engineering, Southwest Jiaotong University; Chengdu 610031 People's Republic of China
| | - Minghua Zhu
- Sichuan Centre for disease control and prevention; Chengdu 610041 People's Republic of China
| |
Collapse
|
13
|
Dorozhkin SV. Calcium Orthophosphate-Based Bioceramics. MATERIALS (BASEL, SWITZERLAND) 2013; 6:3840-3942. [PMID: 28788309 PMCID: PMC5452669 DOI: 10.3390/ma6093840] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 08/07/2013] [Accepted: 08/19/2013] [Indexed: 02/07/2023]
Abstract
Various types of grafts have been traditionally used to restore damaged bones. In the late 1960s, a strong interest was raised in studying ceramics as potential bone grafts due to their biomechanical properties. A bit later, such synthetic biomaterials were called bioceramics. In principle, bioceramics can be prepared from diverse materials but this review is limited to calcium orthophosphate-based formulations only, which possess the specific advantages due to the chemical similarity to mammalian bones and teeth. During the past 40 years, there have been a number of important achievements in this field. Namely, after the initial development of bioceramics that was just tolerated in the physiological environment, an emphasis was shifted towards the formulations able to form direct chemical bonds with the adjacent bones. Afterwards, by the structural and compositional controls, it became possible to choose whether the calcium orthophosphate-based implants remain biologically stable once incorporated into the skeletal structure or whether they were resorbed over time. At the turn of the millennium, a new concept of regenerative bioceramics was developed and such formulations became an integrated part of the tissue engineering approach. Now calcium orthophosphate scaffolds are designed to induce bone formation and vascularization. These scaffolds are often porous and harbor different biomolecules and/or cells. Therefore, current biomedical applications of calcium orthophosphate bioceramics include bone augmentations, artificial bone grafts, maxillofacial reconstruction, spinal fusion, periodontal disease repairs and bone fillers after tumor surgery. Perspective future applications comprise drug delivery and tissue engineering purposes because calcium orthophosphates appear to be promising carriers of growth factors, bioactive peptides and various types of cells.
Collapse
|
14
|
Osteoinduction of calcium phosphate biomaterials in small animals. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:1254-60. [DOI: 10.1016/j.msec.2012.12.023] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2012] [Revised: 10/05/2012] [Accepted: 12/03/2012] [Indexed: 11/20/2022]
|
15
|
Meseguer-Olmo L, Vicente-Ortega V, Alcaraz-Baños M, Calvo-Guirado JL, Vallet-Regí M, Arcos D, Baeza A. In-vivo behavior of Si-hydroxyapatite/polycaprolactone/DMB scaffolds fabricated by 3D printing. J Biomed Mater Res A 2012; 101:2038-48. [PMID: 23255259 DOI: 10.1002/jbm.a.34511] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 10/08/2012] [Accepted: 10/29/2012] [Indexed: 11/10/2022]
Abstract
Scaffolds made of polycaprolactone and nanocrystalline silicon-substituted hydroxyapatite have been fabricated by 3D printing rapid prototyping technique. To asses that the scaffolds fulfill the requirements to be considered for bone grafting applications, they were implanted in New Zealand rabbits. Histological and radiological studies have demonstrated that the scaffolds implanted in bone exhibited an excellent osteointegration without the interposition of fibrous tissue between bone and implants and without immune response after 4 months of implantation. In addition, we have evaluated the possibility of improving the scaffolds efficiency by incorporating demineralized bone matrix during the preparation by 3D printing. When demineralized bone matrix (DBM) is incorporated, the efficacy of the scaffolds is enhanced, as new bone formation occurs not only in the peripheral portions of the scaffolds but also within its pores after 4 months of implantation. This enhanced performance can be explained in terms of the osteoinductive properties of the DBM in the scaffolds, which have been assessed through the new bone tissue formation when the scaffolds are ectopically implanted.
Collapse
Affiliation(s)
- Luis Meseguer-Olmo
- Department of Orthopaedic Surgery and Bioengineering Unit, University Hospital V. Arrixaca, University of Murcia, Spain
| | | | | | | | | | | | | |
Collapse
|
16
|
Dorozhkin SV. Biphasic, triphasic and multiphasic calcium orthophosphates. Acta Biomater 2012; 8:963-77. [PMID: 21945826 DOI: 10.1016/j.actbio.2011.09.003] [Citation(s) in RCA: 144] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2011] [Revised: 08/26/2011] [Accepted: 09/01/2011] [Indexed: 01/01/2023]
Abstract
Biphasic, triphasic and multiphasic (polyphasic) calcium orthophosphates have been sought as biomaterials for reconstruction of bone defects in maxillofacial, dental and orthopedic applications. In general, this concept is determined by advantageous balances of more stable (frequently hydroxyapatite) and more resorbable (typically tricalcium orthophosphates) phases of calcium orthophosphates, while the optimum ratios depend on the particular applications. Therefore, all currently known biphasic, triphasic and multiphasic formulations of calcium orthophosphate bioceramics are sparingly soluble in water and, thus, after being implanted they are gradually resorbed inside the body, releasing calcium and orthophosphate ions into the biological medium and, hence, seeding new bone formation. The available formulations have already demonstrated proven biocompatibility, osteoconductivity, safety and predictability in vitro, in vivo, as well as in clinical models. More recently, in vitro and in vivo studies have shown that some of them might possess osteoinductive properties. Hence, in the field of tissue engineering biphasic, triphasic and multiphasic calcium orthophosphates represent promising biomaterials to construct various scaffolds capable of carrying and/or modulating the behavior of cells. Furthermore, such scaffolds are also suitable for drug delivery applications. This review summarizes the available information on biphasic, triphasic and multiphasic calcium orthophosphates, including their biomedical applications. New formulations are also proposed.
Collapse
|
17
|
Dorozhkin SV. Calcium orthophosphates: occurrence, properties, biomineralization, pathological calcification and biomimetic applications. BIOMATTER 2011; 1:121-64. [PMID: 23507744 PMCID: PMC3549886 DOI: 10.4161/biom.18790] [Citation(s) in RCA: 145] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The present overview is intended to point the readers' attention to the important subject of calcium orthophosphates. This type of materials is of special significance for human beings, because they represent the inorganic part of major normal (bones, teeth and antlers) and pathological (i.e., those appearing due to various diseases) calcified tissues of mammals. For example, atherosclerosis results in blood vessel blockage caused by a solid composite of cholesterol with calcium orthophosphates, while dental caries and osteoporosis mean a partial decalcification of teeth and bones, respectively, that results in replacement of a less soluble and harder biological apatite by more soluble and softer calcium hydrogenphosphates. Therefore, the processes of both normal and pathological calcifications are just an in vivo crystallization of calcium orthophosphates. Similarly, dental caries and osteoporosis might be considered an in vivo dissolution of calcium orthophosphates. Thus, calcium orthophosphates hold a great significance for humankind, and in this paper, an overview on the current knowledge on this subject is provided.
Collapse
|
18
|
Draenert K, Draenert M, Erler M, Draenert A, Draenert Y. How bone forms in large cancellous defects: critical analysis based on experimental work and literature. Injury 2011; 42 Suppl 2:S47-55. [PMID: 21742327 DOI: 10.1016/j.injury.2011.06.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The behaviour of physiological biomaterials, β-tricalciumphosphate and hydroxyapatite, is analysed based on current literature and our own experimental work. The properties of graft substitutes based on ceramic materials are clearly defined according to their scientific efficiency. The strength of the materials and their biodegradability are still not fully evaluated. Strength and degradability have a direct proportional relationship and are considered the most efficient way to be adapted by their properties to the needs for the treatment of bone defects. New technologies for the manufacturing process are presented that increase those properties and thus open up new indications and easier application of the ceramic materials. The implantation process as well is carefully validated by animal experiments to avoid failures. Based on the experiments, a completely new approach is defined as to how primary bone formation with osteoconductive ceramics can be achieved. The milestones in that approach comprise a synthetically manufactured replica of the bone marrow spaces as osteoconductive ladder, whereas the bead is defined as bone-forming element. As a result, materials are available with high strength if the ceramic is solid or highly porous and possesses a micro-structure. The injection moulding process allows for the combination of high strength of the material with high porosity. Based on the strong capillary forces, micro-chambered beads fulfil most expectations for primary bone formation in cancellous bone defects, including drug delivery, mechanical strengthening if necessary, and stable implantation in situ by coagulation of the blood and bone marrow suctioned in.
Collapse
Affiliation(s)
- K Draenert
- Zentrum für Orthopädische Wissenschaften, Gabriel-Max-Strasse 3, D 81545 München, Germany.
| | | | | | | | | |
Collapse
|
19
|
Offer L, Veigel B, Pavlidis T, Heiss C, Gelinsky M, Reinstorf A, Wenisch S, Lips KS, Schnettler R. Phosphoserine-modified calcium phosphate cements: bioresorption and substitution. J Tissue Eng Regen Med 2010; 5:11-9. [DOI: 10.1002/term.283] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
20
|
Dorozhkin SV. Calcium orthophosphates as bioceramics: state of the art. J Funct Biomater 2010; 1:22-107. [PMID: 24955932 PMCID: PMC4030894 DOI: 10.3390/jfb1010022] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Revised: 11/16/2010] [Accepted: 11/25/2010] [Indexed: 12/18/2022] Open
Abstract
In the late 1960s, much interest was raised in regard to biomedical applications of various ceramic materials. A little bit later, such materials were named bioceramics. This review is limited to bioceramics prepared from calcium orthophosphates only, which belong to the categories of bioactive and bioresorbable compounds. There have been a number of important advances in this field during the past 30-40 years. Namely, by structural and compositional control, it became possible to choose whether calcium orthophosphate bioceramics were biologically stable once incorporated within the skeletal structure or whether they were resorbed over time. At the turn of the millennium, a new concept of calcium orthophosphate bioceramics-which is able to promote regeneration of bones-was developed. Presently, calcium orthophosphate bioceramics are available in the form of particulates, blocks, cements, coatings, customized designs for specific applications and as injectable composites in a polymer carrier. Current biomedical applications include artificial replacements for hips, knees, teeth, tendons and ligaments, as well as repair for periodontal disease, maxillofacial reconstruction, augmentation and stabilization of the jawbone, spinal fusion and bone fillers after tumor surgery. Exploratory studies demonstrate potential applications of calcium orthophosphate bioceramics as scaffolds, drug delivery systems, as well as carriers of growth factors, bioactive peptides and/or various types of cells for tissue engineering purposes.
Collapse
|
21
|
Park JW, Kim ES, Jang JH, Suh JY, Park KB, Hanawa T. Healing of rabbit calvarial bone defects using biphasic calcium phosphate ceramics made of submicron-sized grains with a hierarchical pore structure. Clin Oral Implants Res 2010; 21:268-76. [DOI: 10.1111/j.1600-0501.2009.01846.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
22
|
|
23
|
Abstract
The present overview is intended to point the readers’ attention to the important subject of calcium orthophosphates. These materials are of the special significance because they represent the inorganic part of major normal (bones, teeth and dear antlers) and pathological (i.e. those appearing due to various diseases) calcified tissues of mammals. Due to a great chemical similarity with the biological calcified tissues, many calcium orthophosphates possess remarkable biocompatibility and bioactivity. Materials scientists use this property extensively to construct artificial bone grafts that are either entirely made of or only surface-coated with the biologically relevant calcium ortho-phosphates. For example, self-setting hydraulic cements made of calcium orthophosphates are helpful in bone repair, while titanium substitutes covered by a surface layer of calcium orthophosphates are used for hip joint endoprostheses and as tooth substitutes. Porous scaffolds made of calcium orthophosphates are very promising tools for tissue engineering applications. In addition, technical grade calcium orthophosphates are very popular mineral fertilizers. Thus ere calcium orthophosphates are of great significance for humankind and, in this paper, an overview on the current knowledge on this subject is provided.
Collapse
|
24
|
Fellah BH, Layrolle P. Sol-gel synthesis and characterization of macroporous calcium phosphate bioceramics containing microporosity. Acta Biomater 2009; 5:735-42. [PMID: 18851931 DOI: 10.1016/j.actbio.2008.09.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2008] [Revised: 09/05/2008] [Accepted: 09/05/2008] [Indexed: 10/21/2022]
Abstract
Amorphous calcium phosphate powders were precipitated from calcium metal and phosphoric acid in ethanol. Depending on the quantity of reagent, the CaP powders had different chemical compositions and, after heating, formed beta-tricalcium phosphate (beta-TCP), hydroxyapatite (HA) or BCP mixtures. Dilatometric measurements indicated that shrinkage of compacted CaP powders occurred first at around 650 degrees C and continued up to 1200 degrees C. The amorphous CaP powders were mixed with urea beads, compacted under isostatic pressure at 140 MPa and sintered at 1100 degrees C for 5 h. Scanning electron microscopy indicated that macro-microporous ceramics were produced. The ceramics had spherical macropores of 700-1200 microm in diameter, with limited interconnections and a macroporosity of 42% as determined by microcomputed tomography. The micropores ranged from 0.1 to 1 microm in diameter. These ceramics made of HA, beta-TCP or BCP exhibiting both macroporosity and microporosity can be used as bone fillers.
Collapse
|