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Effects of GH on the Aging Process in Several Organs: Mechanisms of Action. Int J Mol Sci 2022; 23:ijms23147848. [PMID: 35887196 PMCID: PMC9318627 DOI: 10.3390/ijms23147848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/26/2022] [Accepted: 07/11/2022] [Indexed: 11/17/2022] Open
Abstract
In order to investigate the possible beneficial effects of GH administration on the aging process, 24-month-old rats of both sexes and 10-month-old SAMP8 mice were used. Male rats showed increased fat content and decreased lean body mass together with enhanced vasoconstriction and reduced vasodilation of their aortic rings compared to young adult animals. Chronic GH treatment for 10 weeks increased lean body mass and reduced fat weight together with inducing an enhancement of the vasodilatory response by increasing eNOS and a reduction of the constrictory responses. Old SAMP8 male mice also showed insulin resistance together with a decrease in insulin production by the endocrine pancreas and a reduced expression of differentiation parameters. GH treatment decreased plasma levels and increased pancreatic production of insulin and restored differentiation parameters in these animals. Ovariectomy plus low calcium diet in rabbits induced osteoporosis Titanium implants inserted into these rabbit tibiae showed after one month lesser bone to implant (BIC) surface and bone mineral density (BMD). Local application of GH in the surgical opening was able to increase BIC in the osteoporotic group. The hippocampus of old rats showed a reduction in the number of neurons and also in neurogenesis compared to young ones, together with an increase of caspases and a reduction of Bcl-2. GH treatment was able to enhance significantly only the total number of neurons. In conclusion, GH treatment was able to show beneficial effects in old animals on all the different organs and metabolic functions studied.
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Oki Y, Doi K, Kobatake R, Makihara Y, Morita K, Kubo T, Tsuga K. Histological and histomorphometric aspects of continual intermittent parathyroid hormone administration on osseointegration in osteoporosis rabbit model. PLoS One 2022; 17:e0269040. [PMID: 35675357 PMCID: PMC9176794 DOI: 10.1371/journal.pone.0269040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 05/12/2022] [Indexed: 11/18/2022] Open
Abstract
In implant treatment, primary stability and osseointegration are improved by continual intermittent administration of parathyroid hormone (PTH) in patients with osteoporosis. However, the histological and histomorphometric aspects are not clear. The aim of this study was to investigate the histological and histomorphometric effects of intermittent PTH administration on osseointegration in a glucocorticoid-induced osteoporotic rabbit model. Fifteen female New Zealand rabbits were prepared for the osteoporosis model with ovariectomy and glucocorticoid administration. After 1 week, five rabbits were intermittently administered PTH for 8 weeks until the end point (PTHa group) and five for 4 weeks until implant placement (PTHb group). The remaining rabbits were intermittently administered saline for 8 weeks until the end point (Control group). Dental implants were inserted into the femoral epiphyses 11 weeks after ovariectomy. After 4 weeks, the maximum removal torque (RT) of the placed implant and bone implant contact (BIC) ratio were evaluated. In addition micro-computed tomography and histomorphometric analyses were performed. The RT and BIC values were significantly higher in the PTHa group compared with those of the PTHb and Control groups (p< 0.05). Furthermore, the bone mineral densities and Hounsfield units were significantly higher in the PTHa group than those in the PTHb and Control groups. Histologic and histomorphometric measurements revealed that continuous administration of PTH improved bone density and bone formation around the implant placement site, as well as systemic bone formation. Therefore, favorable implant stability was achieved under osteoporosis.
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Affiliation(s)
- Yoshifumi Oki
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Kazuya Doi
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
- * E-mail:
| | - Reiko Kobatake
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Yusuke Makihara
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Koji Morita
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Takayasu Kubo
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
| | - Kazuhiro Tsuga
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan
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Osteogenesis Differences Around Titanium Implant and in Bone Defect Between Jaw Bones and Long Bones. J Craniofac Surg 2021; 31:2193-2198. [PMID: 33136853 DOI: 10.1097/scs.0000000000006795] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The aim of this study is to evaluate the osteogenesis around titanium implant and in bone defect or fracture in jaw bones and long bones in ovariectomized (OVX) animal models. The literature on the osteogenesis around titanium implant and in bone defect or fracture in jaw bones and long bones was reviewed with charts. Fourty-eight rats were randomly divided into OVX group with ovariectomy and SHAM (sham-surgery) group with sham surgery. Titanium implants were inserted in the right mandibles and tibiae; bone defects were created in the left mandibles and tibiae. Two-week postoperatively, mandibles and tibiae of 8 rats were harvested and examined by hematoxylin and eosin staining and histological analysis; 4-week postoperatively, all mandibles and tibiae were harvested and examined by Micro-CT and histological analysis. A total of 52 articles were included in this literature review. Tibial osteogenesis around titanium implant and in bone defect in OVX group were significantly decreased compared with SHAM group. However, osteogenesis differences in the mandible both around titanium implant and in bone defect between groups were not statistically significant. OVX-induced osteoporosis suppresses osteogenesis around titanium implant and in the bone defect or fracture in long bones significantly while has less effect on that in the jaw bones.
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Lee UL, Lim JY, Park SN, Choi BH, Kang H, Choi WC. A Clinical Trial to Evaluate the Efficacy and Safety of 3D Printed Bioceramic Implants for the Reconstruction of Zygomatic Bone Defects. MATERIALS 2020; 13:ma13204515. [PMID: 33053855 PMCID: PMC7601564 DOI: 10.3390/ma13204515] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/06/2020] [Accepted: 10/09/2020] [Indexed: 11/16/2022]
Abstract
The purpose of this study was to evaluate the clinical efficacy and safety of patient-specific additive-manufactured CaOSiO2-P2O5-B2O3 glass-ceramic (BGS-7) implants for reconstructing zygomatic bone defects at a 6-month follow-up. A prospective, single-arm, single-center, clinical trial was performed on patients with obvious zygoma defects who needed and wanted reconstruction. The primary outcome variable was a bone fusion between the implant and the bone evaluated by computed tomography (CT) at 6 months post surgery. Secondary outcomes, including implant immobilization, satisfaction assessment, osteolysis, subsidence of the BGS-7 implant, and safety, were assessed. A total of eight patients were enrolled in the study. Two patients underwent simultaneous reconstruction of the left and right malar defects using a BGS-7 3D printed implant. Cone beam CT analysis showed that bone fusion at 6 months after surgery was 100%. We observed that the average fusion rate was 76.97%. Osteolysis around 3D printed BGS-7 implants was not observed. The mean distance displacement of all 10 implants was 0.4149 mm. Our study showed no adverse event in any of the cases. The visual analog scale score for satisfaction was 9. All patients who enrolled in this trial were aesthetically and functionally satisfied with the surgical results. In conclusion, this study demonstrates the safety and promising value of patient-specific 3D printed BGS-7 implants as a novel facial bone reconstruction method.
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Affiliation(s)
- Ui-Lyong Lee
- Department of Oral and Maxillofacial Surgery, Chung-Ang University Hospital, Soeul 06973, Korea
- Chung-Ang 3D Craniofacial Research Society, Chun-Ang University, Seoul 06974, Korea
- Correspondence: (U.-L.L.); (W.-C.C.)
| | - Jun-Young Lim
- CGbio 3D Innovation Center, Seongnam-si 13211, Korea; (J.-Y.L.); (S.-N.P.); (B.-H.C.)
| | - Sung-Nam Park
- CGbio 3D Innovation Center, Seongnam-si 13211, Korea; (J.-Y.L.); (S.-N.P.); (B.-H.C.)
| | - Byoung-Hun Choi
- CGbio 3D Innovation Center, Seongnam-si 13211, Korea; (J.-Y.L.); (S.-N.P.); (B.-H.C.)
| | - Hyun Kang
- Department of Anesthesiology and Pain Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea;
| | - Won-Cheul Choi
- Chung-Ang 3D Craniofacial Research Society, Chun-Ang University, Seoul 06974, Korea
- Department of Orthodontics, Chung-Ang University Hospital, Seoul 06974, Korea
- Correspondence: (U.-L.L.); (W.-C.C.)
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Maenz S, Brinkmann O, Hasenbein I, Braun C, Kunisch E, Horbert V, Gunnella F, Sachse A, Bischoff S, Schubert H, Jandt KD, Bossert J, Driesch D, Kinne RW, Bungartz M. The old sheep: a convenient and suitable model for senile osteopenia. J Bone Miner Metab 2020; 38:620-630. [PMID: 32296985 DOI: 10.1007/s00774-020-01098-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 03/08/2020] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Existing osteoporosis models in sheep exhibit some disadvantages, e.g., challenging surgical procedures, serious ethical concerns, failure of reliable induction of substantial bone loss, or lack of comparability to the human condition. This study aimed to compare bone morphological and mechanical properties of old and young sheep, and to evaluate the suitability of the old sheep as a model for senile osteopenia. MATERIALS AND METHODS The lumbar vertebral body L3 of female merino sheep with two age ranges, i.e., old animals (6-10 years; n = 41) and young animals (2-4 years; n = 40), was analyzed concerning its morphological and mechanical properties by bone densitometry, quantitative histomorphometry, and biomechanical testing of the corticalis and/or central spongious region. RESULTS In comparison with young sheep, old animals showed only marginally diminished bone mineral density of the vertebral bodies, but significantly decreased structural (bone volume, - 15.1%; ventral cortical thickness, - 11.8%; lateral cortical thickness, - 12.2%) and bone formation parameters (osteoid volume, osteoid surface, osteoid thickness, osteoblast surface, all - 100.0%), as well as significantly increased bone erosion (eroded surface, osteoclast surface). This resulted in numerically decreased biomechanical properties (compressive strength; - 6.4%). CONCLUSION Old sheep may represent a suitable model of senile osteopenia with markedly diminished bone structure and formation, and substantially augmented bone erosion. The underlying physiological aging concept reduces challenging surgical procedures and ethical concerns and, due to complex alteration of different facets of bone turnover, may be well representative of the human condition.
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Affiliation(s)
- Stefan Maenz
- Chair of Materials Science, Otto Schott Institute of Materials Research, Friedrich-Schiller-University Jena, Jena, Germany
| | - Olaf Brinkmann
- Chair of Orthopedics, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Eisenberg, Germany
- Experimental Rheumatology Unit, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Klosterlausnitzer Str. 81, 07607, Eisenberg, Germany
| | - Ines Hasenbein
- Experimental Rheumatology Unit, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Klosterlausnitzer Str. 81, 07607, Eisenberg, Germany
| | - Christina Braun
- Experimental Rheumatology Unit, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Klosterlausnitzer Str. 81, 07607, Eisenberg, Germany
| | - Elke Kunisch
- Experimental Rheumatology Unit, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Klosterlausnitzer Str. 81, 07607, Eisenberg, Germany
| | - Victoria Horbert
- Experimental Rheumatology Unit, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Klosterlausnitzer Str. 81, 07607, Eisenberg, Germany
| | - Francesca Gunnella
- Experimental Rheumatology Unit, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Klosterlausnitzer Str. 81, 07607, Eisenberg, Germany
| | - André Sachse
- Experimental Rheumatology Unit, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Klosterlausnitzer Str. 81, 07607, Eisenberg, Germany
| | - Sabine Bischoff
- Institute of Laboratory Animal Sciences and Welfare, Jena University Hospital, Jena, Germany
| | - Harald Schubert
- Institute of Laboratory Animal Sciences and Welfare, Jena University Hospital, Jena, Germany
| | - Klaus D Jandt
- Chair of Materials Science, Otto Schott Institute of Materials Research, Friedrich-Schiller-University Jena, Jena, Germany
| | - Jörg Bossert
- Chair of Materials Science, Otto Schott Institute of Materials Research, Friedrich-Schiller-University Jena, Jena, Germany
| | | | - Raimund W Kinne
- Experimental Rheumatology Unit, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Klosterlausnitzer Str. 81, 07607, Eisenberg, Germany.
| | - Matthias Bungartz
- Chair of Orthopedics, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Eisenberg, Germany
- Experimental Rheumatology Unit, Department of Orthopedics, Jena University Hospital, Waldkliniken Eisenberg GmbH, Klosterlausnitzer Str. 81, 07607, Eisenberg, Germany
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Li Z, Betts D, Kuhn G, Schirmer M, Müller R, Ruffoni D. Mechanical regulation of bone formation and resorption around implants in a mouse model of osteopenic bone. J R Soc Interface 2020; 16:20180667. [PMID: 30890053 DOI: 10.1098/rsif.2018.0667] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Although mechanical stimulation is considered a promising approach to accelerate implant integration, our understanding of load-driven bone formation and resorption around implants is still limited. This lack of knowledge may delay the development of effective loading protocols to prevent implant loosening, especially in osteoporosis. In healthy bone, formation and resorption are mechanoregulated processes. In the intricate context of peri-implant bone regeneration, it is not clear whether bone (re)modelling can still be load-driven. Here, we investigated the mechanical control of peri-implant bone (re)modelling with a well-controlled mechanobiological experiment. We applied cyclic mechanical loading after implant insertion in tail vertebrae of oestrogen depleted mice and we monitored peri-implant bone response by in vivo micro-CT. Experimental data were combined with micro-finite element simulations to estimate local tissue strains in (re)modelling locations. We demonstrated that a substantial increase in bone mass around the implant could be obtained by loading the entire bone. This augmentation could be attributed to a large reduction in bone resorption rather than to an increase in bone formation. We also showed that following implantation, mechanical regulation of bone (re)modelling was transiently lost. Our findings should help to clarify the role of mechanical stimulation on the maintenance of peri-implant bone mass.
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Affiliation(s)
- Zihui Li
- 1 Institute for Biomechanics, ETH Zurich , Zurich , Switzerland
| | - Duncan Betts
- 1 Institute for Biomechanics, ETH Zurich , Zurich , Switzerland
| | - Gisela Kuhn
- 1 Institute for Biomechanics, ETH Zurich , Zurich , Switzerland
| | | | - Ralph Müller
- 1 Institute for Biomechanics, ETH Zurich , Zurich , Switzerland
| | - Davide Ruffoni
- 1 Institute for Biomechanics, ETH Zurich , Zurich , Switzerland.,3 Mechanics of Biological and Bioinspired Materials Laboratory, Department of Aerospace and Mechanical Engineering, University of Liège , Liège , Belgium
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Suva LJ, Westhusin ME, Long CR, Gaddy D. Engineering bone phenotypes in domestic animals: Unique resources for enhancing musculoskeletal research. Bone 2020; 130:115119. [PMID: 31712131 PMCID: PMC8805042 DOI: 10.1016/j.bone.2019.115119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 10/16/2019] [Accepted: 10/21/2019] [Indexed: 10/25/2022]
Affiliation(s)
- Larry J Suva
- Department of Veterinary Physiology and Pharmacology, College Station, TX, 77843, United States.
| | - Mark E Westhusin
- Department of Veterinary Physiology and Pharmacology, College Station, TX, 77843, United States
| | - Charles R Long
- Department of Veterinary Physiology and Pharmacology, College Station, TX, 77843, United States
| | - Dana Gaddy
- Department of Veterinary Integrative Biosciences Texas A&M University, College Station, TX 77843, United States
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Dereka X, Calciolari E, Donos N, Mardas N. Osseointegration in osteoporotic-like condition: A systematic review of preclinical studies. J Periodontal Res 2018; 53:933-940. [PMID: 29845622 DOI: 10.1111/jre.12566] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/28/2018] [Indexed: 12/11/2022]
Abstract
Osteoporosis is one of the most common skeletal disorders affecting a significant percentage of people worldwide. Research data suggested that systemic diseases such as osteoporosis could act as risk factors for osseointegration, jeopardizing the healing process and thus the predictability of dental implant success on compromised patients. It is well accepted that preclinical studies in animal models reproducing the osteoporotic condition are one of the most important stages in the research of new biomaterials and therapeutic modalities. The aim of this systematic review was to investigate whether osteoporosis compromises dental implant osseointegration in experimental osteoporotic-like conditions. A 3-stage systematic literature research was conducted in MEDLINE via OVID and EMBASE up to and including March 2017. Experimental studies reporting on dental implant osseointegration on different osteoporotic animal models were assessed. The studies had to report on the percentage of bone-to-implant contact (%BIC) as the primary outcome. ARRIVE guidelines for reporting on animal research were applied to evaluate the methodological quality and risk of bias of the studies. Fifty-seven studies met the inclusion criteria and were assessed qualitatively. The most adopted animal model was the rat. A variability of %BIC values was observed, ranging from 30% to 99% and from 26% to 94% for the healthy and osteoporotic group, respectively. The great majority (47) of the included studies concluded that estrogen deficiency significantly affects BIC values, 9 studies stated that it was not possible to observe statistical differences in BIC between ovariectomized and healthy groups and 1 study did not provide a comparison between the healthy and osteoporotic group. Owing to the great heterogeneity in implant surface, study design, observation time-points, site of implant placement and reported outcomes, a meta-analysis could not be performed. An overall high risk of bias was observed, owing to the limited information on animal housing and husbandry, baseline characteristics and health status, ethical statement and allocation to the experimental groups provided. Although the available studies seem to suggest a lower osseointegration in osteoporotic-like conditions, no robust conclusions can be drawn due to the great heterogeneity and overall low quality of the available studies. Future studies with emphasis on minimizing the possible sources of bias and evaluating osseointegration of dental implants placed into jawbones instead of long bones are warranted.
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Affiliation(s)
- X Dereka
- Department of Periodontology, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
- Centre for Oral Immunobiology & Regenerative Medicine, Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
- Centre for Clinical Oral Research, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
| | - E Calciolari
- Centre for Oral Immunobiology & Regenerative Medicine, Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
- Centre for Clinical Oral Research, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
| | - N Donos
- Centre for Oral Immunobiology & Regenerative Medicine, Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
- Centre for Clinical Oral Research, Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
| | - N Mardas
- Centre for Oral Immunobiology & Regenerative Medicine, Barts and The London School of Medicine and Dentistry, Queen Mary University of London (QMUL), London, UK
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Yan S, Xia P, Xu S, Zhang K, Li G, Cui L, Yin J. Nanocomposite Porous Microcarriers Based on Strontium-Substituted HA- g-Poly(γ-benzyl-l-glutamate) for Bone Tissue Engineering. ACS APPLIED MATERIALS & INTERFACES 2018; 10:16270-16281. [PMID: 29688701 DOI: 10.1021/acsami.8b02448] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Porous microcarriers have aroused increasing attention recently, which can create a protected environment for sufficient cell seeding density, facilitate oxygen and nutrient transfer, and well support the cell attachment and growth. In this study, porous microcarriers fabricated from the strontium-substituted hydroxyapatite- graft-poly(γ-benzyl-l-glutamate) (Sr10-HA- g-PBLG) hybrid nanocomposite were developed. The surface grating of PBLG, the micromorphology and element distribution, mechanical strength, in vitro degradation, and Sr2+ ion release of the obtained Sr10-HA- g-PBLG porous microcarriers were investigated, respectively. The grafting ratio and the molecular weight of the grafted PBLG of Sr10-HA- g-PBLG could be effectively controlled by varying the initial ratio of BLG-NCA to Sr10-HA-NH2. The microcarriers exhibited a highly porous and interconnected microstructure with the porosity of about 90% and overall density of 1.03-1.06 g/cm3. Also, the degradation rate of Sr10-HA-PBLG microcarriers could be effectively controlled and long-term Sr2+ release was obtained. The Sr10-HA-PBLG microcarriers allowed cells adhesion, infiltration, and proliferation and promoted the osteogenic differentiation of rabbit adipose-derived stem cells (ADSCs). Successful healing of femoral bone defect was proved by injection of the ADSCs-seeded Sr10-HA-PBLG microcarriers in a rabbit model.
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Affiliation(s)
- Shifeng Yan
- Department of Polymer Materials , Shanghai University , 99 Shangda Road , Shanghai 200444 , People's Republic of China
| | - Pengfei Xia
- Department of Polymer Materials , Shanghai University , 99 Shangda Road , Shanghai 200444 , People's Republic of China
| | - Shenghua Xu
- Department of Polymer Materials , Shanghai University , 99 Shangda Road , Shanghai 200444 , People's Republic of China
| | - Kunxi Zhang
- Department of Polymer Materials , Shanghai University , 99 Shangda Road , Shanghai 200444 , People's Republic of China
| | - Guifei Li
- Department of Polymer Materials , Shanghai University , 99 Shangda Road , Shanghai 200444 , People's Republic of China
| | - Lei Cui
- Department of Orthopedics, Shanghai Tongji Hospital , Tongji University School of Medicine , 389 Xincun Road , Shanghai 200065 , People's Republic of China
| | - Jingbo Yin
- Department of Polymer Materials , Shanghai University , 99 Shangda Road , Shanghai 200444 , People's Republic of China
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Dias IR, Camassa JA, Bordelo JA, Babo PS, Viegas CA, Dourado N, Reis RL, Gomes ME. Preclinical and Translational Studies in Small Ruminants (Sheep and Goat) as Models for Osteoporosis Research. Curr Osteoporos Rep 2018; 16:182-197. [PMID: 29460175 DOI: 10.1007/s11914-018-0431-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE OF THE REVIEW This review summarizes research on the use of sheep and goats as large animal models of human osteoporosis for preclinical and translational studies. RECENT FINDINGS The most frequent osteoporotic sheep model used is the ovariectomized sheep with 12 months post-operatively or more and the combined treatment of ovariectomized sheep associated to calcium/vitamin D-deficient diet and glucocorticoid applications for 6 months, but other methods are also described, like pinealectomy or hypothalamic-pituitary disconnection in ovariectomized sheep. The goat model for osteoporosis research has been used in a very limited number of studies in osteoporosis research relative to sheep. These osteoporotic small ruminant models are applied for biomaterial research, bone augmentation, efficacy of implant fixation, fragility fracture-healing process improvement, or bone-defect repair studies in the osteopenic or osteoporotic bone. Sheep are a recognized large animal model for preclinical and translational studies in osteoporosis research and the goat to a lesser extent. Recently, the pathophysiological mechanism underlying induction of osteoporosis in glucocorticoid-treated ovariectomized aged sheep was clarified, being similar to what occurs in postmenopausal women with glucocorticoid-induced osteoporosis. It was also concluded that the receptor activator of NF-κB ligand was stimulated in the late progressive phase of the osteoporosis induced by steroids in sheep. The knowledge of the pathophysiological mechanisms at the cellular and molecular levels of the induction of osteoporosis in small ruminants, if identical to humans, will allow in the future, the use of these animal models with greater confidence in the preclinical and translational studies for osteoporosis research.
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Affiliation(s)
- Isabel R Dias
- Department of Veterinary Sciences, Agricultural and Veterinary Sciences School, University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, 5000-801, Vila Real, Portugal.
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017, Guimarães, Portugal.
- ICVS/3B's-PT Government Associate Laboratory, Guimarães, Braga, Portugal.
| | - José A Camassa
- Department of Veterinary Sciences, Agricultural and Veterinary Sciences School, University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, 5000-801, Vila Real, Portugal
| | - João A Bordelo
- Department of Veterinary Sciences, Agricultural and Veterinary Sciences School, University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, 5000-801, Vila Real, Portugal
| | - Pedro S Babo
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Guimarães, Braga, Portugal
| | - Carlos A Viegas
- Department of Veterinary Sciences, Agricultural and Veterinary Sciences School, University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, 5000-801, Vila Real, Portugal
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Guimarães, Braga, Portugal
| | - Nuno Dourado
- CMEMS-UMinho, Department of Mechanical Engineering, University of Minho, Campus de Azurém, 4804-533, Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Guimarães, Braga, Portugal
| | - Manuela E Gomes
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Guimarães, Braga, Portugal
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Borsari V, Fini M, Giavaresi G, Rimondini L, Chiesa R, Chiusoli L, Giardino R. Sandblasted Titanium Osteointegration in Young, Aged and Ovariectomized Sheep. Int J Artif Organs 2018; 30:163-72. [PMID: 17377911 DOI: 10.1177/039139880703000211] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
To evaluate how aging and estrogen deficiency influence the success rate of Sandblasted Titanium (Ti/SA) implants, the osteointegration of Ti/SA rods was studied in the cortical and trabecular bone of 5 young, 5 aged and 5 ovariectomized (OVX) sheep. The characterization of the host bone by transiliac biopsies of the iliac crest showed a progressive rarefaction of trabecular bone in aged and OVX animals when compared to young ones. A significant reduction, both in cortical and trabecular bone, of the osteointegration rate of Ti/SA rods in the presence of estrogen deficiency compared to young animals was observed, while only a minor reduction was observed in aged animals. These results were confirmed by the pushout test in cortical bone. Bone quality affected the biological response of bone to Ti/SA implants in both trabecular and cortical bone; consequently, strategies to maximize the bone osteogenic properties of osteoporotic patients should be adopted.
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Affiliation(s)
- V Borsari
- Experimental Surgery Department, Research Institute Codivilla-Putti, Rizzoli Orthopedic Institute, Bologna, Italy
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12
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Li Z, Kuhn G, Schirmer M, Müller R, Ruffoni D. Impaired bone formation in ovariectomized mice reduces implant integration as indicated by longitudinal in vivo micro-computed tomography. PLoS One 2017; 12:e0184835. [PMID: 28910363 PMCID: PMC5599039 DOI: 10.1371/journal.pone.0184835] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 08/31/2017] [Indexed: 12/29/2022] Open
Abstract
Although osteoporotic bone, with low bone mass and deteriorated bone architecture, provides a less favorable mechanical environment than healthy bone for implant fixation, there is no general agreement on the impact of osteoporosis on peri-implant bone (re)modeling, which is ultimately responsible for the long term stability of the bone-implant system. Here, we inserted an implant in a mouse model mimicking estrogen deficiency-induced bone loss and we monitored with longitudinal in vivo micro-computed tomography the spatio-temporal changes in bone (re)modeling and architecture, considering the separate contributions of trabecular, endocortical and periosteal surfaces. Specifically, 12 week-old C57BL/6J mice underwent OVX/SHM surgery; 9 weeks after we inserted special metal-ceramics implants into the 6th caudal vertebra and we measured bone response with in vivo micro-CT weekly for the following 6 weeks. Our results indicated that ovariectomized mice showed a reduced ability to increase the thickness of the cortical shell close to the implant because of impaired peri-implant bone formation, especially at the periosteal surface. Moreover, we observed that healthy mice had a significantly higher loss of trabecular bone far from the implant than estrogen depleted animals. Such behavior suggests that, in healthy mice, the substantial increase in peri-implant bone formation which rapidly thickened the cortex to secure the implant may raise bone resorption elsewhere and, specifically, in the trabecular network of the same bone but far from the implant. Considering the already deteriorated bone structure of estrogen depleted mice, further bone loss seemed to be hindered. The obtained knowledge on the dynamic response of diseased bone following implant insertion should provide useful guidelines to develop advanced treatments for osteoporotic fracture fixation based on local and selective manipulation of bone turnover in the peri-implant region.
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Affiliation(s)
- Zihui Li
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Gisela Kuhn
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | | | - Ralph Müller
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Davide Ruffoni
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
- Mechanics of Biological and Bioinspired Materials Research Unit, Department of Aerospace and Mechanical Engineering, University of Liège, Liège, Belgium
- * E-mail:
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13
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Deng Y, Yang Y, Ma Y, Fan K, Yang W, Yin G. Nano-hydroxyapatite reinforced polyphenylene sulfide biocomposite with superior cytocompatibility and in vivo osteogenesis as a novel orthopedic implant. RSC Adv 2017. [DOI: 10.1039/c6ra25526d] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The design of novel functional biomaterials that possess similar mechanical attributes as human bones, accompanied with admirable osteogenesis to replace conventional metallic implants would be an intriguing accomplishment.
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Affiliation(s)
- Yi Deng
- School of Chemical Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Yuanyi Yang
- Department of Materials Engineering
- Sichuan College of Architectural Technology
- Deyang 618000
- China
| | - Yuan Ma
- Department of Neurosurgery
- Chengdu Military General Hospital
- Chengdu 610083
- China
| | - Kexia Fan
- Department of Neurosurgery
- Chengdu Military General Hospital
- Chengdu 610083
- China
| | - Weizhong Yang
- College of Materials Science and Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Guangfu Yin
- College of Materials Science and Engineering
- Sichuan University
- Chengdu 610065
- China
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14
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Li Y, He S, Hua Y, Hu J. Effect of osteoporosis on fixation of osseointegrated implants in rats. J Biomed Mater Res B Appl Biomater 2016; 105:2426-2432. [PMID: 27618689 DOI: 10.1002/jbm.b.33787] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 07/29/2016] [Accepted: 08/28/2016] [Indexed: 02/05/2023]
Abstract
The effect of osteoporosis on implant osseointegration has been widely investigated, whereas osteoporosis may also newly occur in patient with previously osseointegrated implant. This study was designed to investigate the effect of osteoporosis on implant fixation in rats after successful osseointegration had been obtained. Seventy female Sprague-Dawley rats were included, and each animal received two titanium implants in the distal metaphysis of femur bilaterally. Eight weeks later, ten rats were sacrificed to confirm the establishment of implant osseointegration. All left rats were randomly subjected to bilateral ovariectomy (OVX) or sham operation. Three, six, and twelve weeks later, implant osseointegration, peri-implant bone tissue, and biomechanical properties of implant were analyzed. Right femurs with implants were used for micro-CT and histological analysis, and left femurs with implants were used for biomechanical test. Micro-CT, histology, and biomechanical test confirmed the destructive effect of OVX on previously osseointegrated implant in rats; when compared to sham-operated rats, peri-implant bone volume, trabecular architecture, bone-to-implant contact ratio, as well as biomechanical parameters decreased progressively within 12 weeks. Results also indicated that the effect of OVX on undisturbed bone (proximal tibiae) was much stronger than that on peri-implant bone. Osteoporosis produced a progressive negative effect on previously osseointegrated implant in distal femora of rats during 12 weeks. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2426-2432, 2017.
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Affiliation(s)
- Yunfeng Li
- Department of Oral & Maxillofacial surgery, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Sheng He
- Department of Oral & Maxillofacial surgery, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yunwei Hua
- Department of Oral & Maxillofacial surgery, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Jing Hu
- Department of Oral & Maxillofacial surgery, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
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15
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Li Y, He D, Liu B, Hu J. SEMA3A suspended in matrigel improves titanium implant fixation in ovariectomized rats. J Biomed Mater Res B Appl Biomater 2016; 105:2060-2065. [PMID: 27403923 DOI: 10.1002/jbm.b.33730] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 05/16/2016] [Accepted: 05/24/2016] [Indexed: 02/05/2023]
Affiliation(s)
- Yunfeng Li
- Department of Oral and Maxillofacial surgery; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University; Chengdu 610041 China
| | - Dongming He
- Department of Oral and Maxillofacial surgery; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University; Chengdu 610041 China
| | - Biao Liu
- Department of Oral and Maxillofacial surgery; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University; Chengdu 610041 China
| | - Jing Hu
- Department of Oral and Maxillofacial surgery; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University; Chengdu 610041 China
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16
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Sá MJC, Rezende CMF, Silva Junior VA, Garcia HC, Griffon DJ, Silva VV. In Vivo Behavior of Zirconia—Hydroxyapatite (ZH) Ceramic Implants in Dogs: A Clinical, Radiographic, and Histological Study. J Biomater Appl 2016; 22:5-31. [PMID: 17690118 DOI: 10.1177/0885328206065860] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The main goal of this study is to evaluate potential applications of two zirconia—hydroxyapatite composites, Z4H6 and Z6H4, as bone substitutes. Composite plugs were implanted into the distal femoral metaphysis and also onto the longissimus dorsi of 18 adult mixed-breed dogs in order to assess in vivo biocompatibility by immediate clinical and radiographic evaluation 30, 90, and 120 days after implantation. Radiographic examination revealed radiolucency on the defect site. However, a progressive increase in bone density was observed over time, reaching a radiopacity similar to that of bone 120 days after implantation. Histological study revealed that a thin layer of fibroblasts was observed at the implant—bone interface in addition to osteoblastic activity 30 days after implantation, whereas bone neoformation around the implants was detected for the subsequent implantation times (90 and 120 days). Otherwise, the histological evaluation of the implant—muscle interface showed the presence of an initially thick fibrous tissue layer 30 days after implantation, which decreased with longer investigation times (90 and 120 days). The numbers of plasmocytes, lymphocytes, and macrophages gradually reduced as a function implantation time, being completely absent 120 days after implantation with a resulting complete osteointegration process. The zirconia phase content did not affect the bioactive behavior of the implants investigated and did not induce bone formation when implanted into muscle either.
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Affiliation(s)
- M J C Sá
- School of Veterinary, Federal University of Minas Gerais State Av Antônio Carlos, 6627, CP 567, Pampulha CEP 30161-970, Belo Horizonte, MG, Brazil
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17
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Dang Y, Zhang L, Song W, Chang B, Han T, Zhang Y, Zhao L. In vivo osseointegration of Ti implants with a strontium-containing nanotubular coating. Int J Nanomedicine 2016; 11:1003-11. [PMID: 27042055 PMCID: PMC4798202 DOI: 10.2147/ijn.s102552] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Novel biomedical titanium (Ti) implants with high osteogenic ability for fast and good osseointegration under normal as well as osteoporotic conditions are urgently needed. Expanding on our previous in vitro results, we hypothesized that nanotubular, strontium-loaded (NT-Sr) structures on Ti implants would have favorable osteogenic effects and evaluated the in vivo osseointegration of these implants in rats. The structures with nanotubes of different diameters were fabricated by electrochemical anodization at 10 and 40 V, and the amounts of Sr loaded were adjusted by using two hydrothermal treatment times of 1 and 3 hours. Qualitative microcomputed tomography in two and three dimensions showed that the NT-Sr formed with an anodization voltage of 10 V and hydrothermal treatment time of 3 hours best supported bone growth in vivo. Histomorphometric examination of osseointegration also showed that more newly formed bone was found at its surface. The bone–implant contact percentage was highest (92.48%±0.76%) at 12 weeks. In conclusion, the NT-Sr formed with an anodization voltage of 10 V and hydrothermal treatment time of 3 hours showed excellent osteogenic properties, making it an attractive option for Ti surface modification with considerable clinical potential.
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Affiliation(s)
- Yonggang Dang
- Department of Prosthetic Dentistry, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Li Zhang
- Department of Prosthetic Dentistry, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Wen Song
- Department of Prosthetic Dentistry, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Bei Chang
- Department of Prosthetic Dentistry, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Tianxiao Han
- Department of Prosthetic Dentistry, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Yumei Zhang
- Department of Prosthetic Dentistry, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Lingzhou Zhao
- Department of Periodontology, School of Stomatology, State Key Laboratory of Military Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
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18
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Teng HP, Yang CJ, Lin JF, Huang YH, Lu FH. A Simple Method to Functionalize the Surface of Plasma Electrolytic Oxidation Produced TiO2 Coatings for Growing Hydroxyapatite. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.02.060] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Abstract
Osteoporosis is a chronic systemic bone disease of growing relevance due to the on-going demographic change. Since the underlying regulatory mechanisms of this critical illness are still not fully understood and treatment options are not satisfactorily resolved, there is still a great need for osteoporosis research in general and animal models in particular. Ovariectomized rodents are standard animal models for postmenopausal osteoporosis and highly attractive due to the possibility to specifically modify their genetic background. However, some aspects can only be addressed in large animal models; such as metaphyseal fracture healing and advancement of orthopedic implants. Among other large animal models sheep in particular have been proven invaluable for osteoporosis research in this context. In conclusion, today we are able to influence the bone metabolism in animals causing a more or less pronounced systemic bone loss and structural deterioration comparable to the situation found in patients suffering from osteoporosis. However, there is no perfect model for osteoporosis, but a variety of models appropriate for answering specific questions. Though, the appropriateness of an animal model is not only defined in regard to the similarity to human physiology and the disease itself, but also in regard to acquisition, housing requirements, handling, costs, and particularly ethical concerns and animal welfare.
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Affiliation(s)
- Ralf Oheim
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany.
| | - Thorsten Schinke
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Michael Amling
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | - Pia Pogoda
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
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20
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Surface topography of hydroxyapatite promotes osteogenic differentiation of human bone marrow mesenchymal stem cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 60:45-53. [PMID: 26706505 DOI: 10.1016/j.msec.2015.11.012] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 10/13/2015] [Accepted: 11/05/2015] [Indexed: 11/20/2022]
Abstract
Effective and safe induction of osteogenic differentiation is one of the key elements of bone tissue engineering. Surface topography of scaffold materials was recently found to promote osteogenic differentiation. Utilization of this topography may be a safer approach than traditional induction by growth factors or chemicals. The aim of this study is to investigate the enhancement of osteogenic differentiation by surface topography and its mechanism of action. Hydroxyapatite (HA) discs with average roughness (Ra) of surface topography ranging from 0.2 to 1.65 μm and mean distance between peaks (RSm) ranging from 89.7 to 18.6 μm were prepared, and human bone-marrow mesenchymal stem cells (hBMSCs) were cultured on these discs. Optimal osteogenic differentiation was observed on discs with surface topography characterized by Ra ranging from 0.77 to 1.09 μm and RSm ranging from 53.9 to 39.3 μm. On this surface configuration of HA, hBMSCs showed oriented attachment, F-actin arrangement, and a peak in the expression of Yes-associated protein (YAP) and PDZ binding motif (TAZ) (YAP/TAZ). These results indicated that the surface topography of HA promoted osteogenic differentiation of hBMSCs, possibly by increasing cell attachment and promoting the YAP/TAZ signaling pathway.
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21
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The effects of combined human parathyroid hormone (1-34) and simvastatin treatment on osseous integration of hydroxyapatite-coated titanium implants in the femur of ovariectomized rats. Injury 2015; 46:2164-9. [PMID: 26404665 DOI: 10.1016/j.injury.2015.08.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 08/06/2015] [Accepted: 08/25/2015] [Indexed: 02/02/2023]
Abstract
The effect of human parathyroid hormone 1-34 (PTH) and simvastatin (SIM) alone could promote bone healing in osteoporotic osseous integration of the implant, but there are no reports about the combined use of PTH and SIM for promotion of bone healing around implant in osteoporotic settings still limited. This study aims to investigate effects of PTH+SIM on osseous integration of the implant in OVX rats. Female Sprague-Dawley rats were used for this study. Twelve weeks after bilateral ovariectomy, all animals were randomly divided into four groups: group control; group SIM; group PTH and group PTH+SIM. Afterwards, all OVX rats received hydroxyapatite (HA)-coated titanium rods (external diameter and length are 1.5mm and 20mm) in the femoral medullary canal. Subsequently, the animals from group SIM, group PTH and group PTH+SIM received human parathyroid hormone 1-34 (60μg/kg, three times a week), SIM (5mg/kg daily), or both for 12 weeks. Implants were inserted bilaterally in all animals until death at 12 weeks. The bilateral femurs of rats were harvested for evaluation. All groups increased new bone formation around the surface of titanium rods and push-out force; group PTH+SIM showed the strongest effects on new bone formation and biomechanical strength. Additionally, these are significant difference observed in bone formation and push-out force between groups SIM and PTH. This finding suggests that intermittent administration of PTH or SIM alone has an effect to increase new bone formation on the surface of HA-coated implants in the osteoporotic condition, and the additive effects of combination PTH and SIM on osseous integration of the implant in OVX rats.
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22
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Tao ZS, Zhou WS, Qiang Z, Tu KK, Huang ZL, Xu HM, Sun T, Lv YX, Cui W, Yang L. Intermittent administration of human parathyroid hormone (1-34) increases fixation of strontium-doped hydroxyapatite coating titanium implants via electrochemical deposition in ovariectomized rat femur. J Biomater Appl 2015; 30:952-60. [PMID: 26482573 DOI: 10.1177/0885328215610898] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Previous studies have demonstrated the effect of human parathyroid hormone (1-34) (PTH) or strontium-doped hydroxyapatite coating (Sr-HA) on osteoporotic bone implantation. However, reports about effects of PTH plus Sr-HA on bone osseointegration of titanium implants in a state of osteoporosis were limited. This study was designed to investigate the effects of intermittent administration of human parathyroid hormone (1-34) on strontium-doped hydroxyapatite coating (Sr-HA) implant fixation in ovariectomized (OVX) rats. Twelve weeks after bilateral ovariectomy, all animals were randomly divided into four groups including control group, Sr group, PTH group and PTH+Sr group. Forty OVX rats accepted implant insertion in the distal femurs, control group, and PTH group with HA implants and the Sr group and PTH+Sr group with Sr-HA implants. Animals from PTH group and PTH+Sr group then randomly received PTH (60 µg/kg, 3 times a week) until death at 12 weeks. After 12-week healing period, implants from group PTH+Sr revealed improved osseointegration compared with other treatment groups, which is manifested by the exceeding increase of bone area ratio and bone-to-implant contact, the trabecular microarchitecture and the maximal push-out force displayed by tests like histomorphometry, micro-CT, and biomechanics evaluation. These results demonstrated that PTH+ Sr-HA coatings could enhance implant osseointegration in OVX rats, and suggested the feasibility of using this method to improve implant fixation in osteoporotic bone.
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Affiliation(s)
- Zhou-Shan Tao
- Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Zhejiang, PR China
| | - Wan-Shu Zhou
- Endocrine & Metabolic Diseases Unit, Affiliated Hospital of Guizhou Medcial University, Guizhou, PR China
| | - Zhou Qiang
- Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Zhejiang, PR China
| | - Kai-kai Tu
- Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Zhejiang, PR China
| | - Zheng-Liang Huang
- Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Zhejiang, PR China
| | - Hong-Ming Xu
- Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Zhejiang, PR China
| | - Tao Sun
- Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Zhejiang, PR China
| | - Yang-Xun Lv
- Department of Orthopaedic Surgery, Wenzhou Central Hospital, Wenzhou, Zhejiang, PR China
| | - Wei Cui
- Sichuan Provincial Orthopedics Hospital, Sichuan, PR China
| | - Lei Yang
- Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical University, Zhejiang, PR China
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23
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Yi S, Rim DC, Park SW, Murovic JA, Lim J, Park J. Biomechanical Comparisons of Pull Out Strengths After Pedicle Screw Augmentation with Hydroxyapatite, Calcium Phosphate, or Polymethylmethacrylate in the Cadaveric Spine. World Neurosurg 2015; 83:976-81. [DOI: 10.1016/j.wneu.2015.01.056] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 01/26/2015] [Accepted: 01/28/2015] [Indexed: 11/16/2022]
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24
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Characterization of the aspects of osteoprogenitor cell interactions with physical tetracalcium phosphate anchorage on titanium implant surfaces. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:7-13. [DOI: 10.1016/j.msec.2014.12.063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 08/29/2014] [Accepted: 12/17/2014] [Indexed: 12/27/2022]
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25
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Cancellous bone response to strontium-doped hydroxyapatite in osteoporotic rats. J Appl Biomater Funct Mater 2015; 13:28-34. [PMID: 24744229 DOI: 10.5301/jabfm.5000168] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2013] [Indexed: 02/05/2023] Open
Abstract
PURPOSE The objective of this study was to investigate cancellous bone response to strontium-doped hydroxyapatite (SrHA) in ovariectomized (OVX) rats. METHODS Hydroxyapatite (HA) and 10%SrHA (HA with 10 mol% calcium substituted by strontium) implants were prepared and characterized by scanning electronic microscopy (SEM), energy dispersive microanalysis (EDX) and X-ray diffraction (XRD). Twelve weeks after bilateral ovariectomy, 20 rats randomly received HA or 10%SrHA implants in the right distal femur, with 10 animals in each group. Eight weeks after implantation, specimens were harvested and analyzed by micro-computed tomography (micro-CT) and histology. RESULTS Compared with HA, 10%SrHA raised the percentage bone volume by 42.6%, bone-to-implant contact by 47.1%, mean trabecular number by 27.3%, mean trabecular thickness by 31.5% and mean connectivity density by 37.4%, while it decreased mean trabecular separation by 20.1% in micro-CT evaluation. 10%SrHA also increased the bone area density by 47.6% in histological analysis. CONCLUSIONS With the HA implants as controls, the 10%SrHA implants were shown to increase bone density and bone-to-implant contact, and improve trabecular architecture in the vicinity of implant surfaces.
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26
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Vacuum extraction enhances rhPDGF-BB immobilization on nanotubes to improve implant osseointegration in ovariectomized rats. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2014; 10:1809-18. [DOI: 10.1016/j.nano.2014.07.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Revised: 05/22/2014] [Accepted: 07/07/2014] [Indexed: 01/22/2023]
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27
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In Vivo Study of Pedicle Screw Augmentation Using Bioactive Glass in Osteoporosis Sheep. ACTA ACUST UNITED AC 2013; 26:E118-23. [DOI: 10.1097/bsd.0b013e31827695e2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Alghamdi HS, Jansen JA. Bone Regeneration Associated with Nontherapeutic and Therapeutic Surface Coatings for Dental Implants in Osteoporosis. TISSUE ENGINEERING PART B-REVIEWS 2013; 19:233-53. [DOI: 10.1089/ten.teb.2012.0400] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Hamdan S. Alghamdi
- Department of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - John A. Jansen
- Department of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
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29
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Alghamdi HS, Bosco R, van den Beucken JJ, Walboomers XF, Jansen JA. Osteogenicity of titanium implants coated with calcium phosphate or collagen type-I in osteoporotic rats. Biomaterials 2013; 34:3747-57. [DOI: 10.1016/j.biomaterials.2013.02.033] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 02/12/2013] [Indexed: 02/07/2023]
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30
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Li YF, Li XD, Bao CY, Chen QM, Zhang H, Hu J. Promotion of peri-implant bone healing by systemically administered parathyroid hormone (1-34) and zoledronic acid adsorbed onto the implant surface. Osteoporos Int 2013; 24:1063-71. [PMID: 23296744 DOI: 10.1007/s00198-012-2258-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 05/30/2012] [Indexed: 11/24/2022]
Abstract
UNLABELLED The effect of human parathyroid hormone 1-34 (PTH) and zoledronic acid (ZA) alone or in combination on bone healing in osteoporotic settings was tested using implants inserted in tibiae of ovariectomized (OVX) rats. Combination therapy promoted bone healing more than each treatment alone 12 weeks after implant insertion. INTRODUCTION PTH and ZA have been demonstrated to be effective on implant fixation. However, reports about the combined use of PTH and ZA for promotion of bone healing around implant in osteoporotic settings are still limited. This study aims to investigate effects of PTH+ZA on implant stabilization in OVX rats. METHODS Twelve weeks after bilateral ovariectomy, OVX rats randomly received implants without or with ZA (by immersion in 1 mg/ml ZA solution for 24 h). Subsequently, half of the animals from each group also received subcutaneous injections of PTH (60 μg/kg, three times a week) for 12 weeks. Thus, there were four groups: control, PTH, ZA, and PTH+ZA. RESULTS All treatments promoted bone healing around implant compared to control, but PTH+ZA treatment showed significantly stronger effects than PTH or ZA alone in histological, micro-CT, and biomechanical tests. CONCLUSION The results indicated the additive effects of PTH and ZA on implant fixation in OVX rats; it was suggested that the anabolic effect of PTH was potent and not blunted by ZA during bone healing around implant when used concurrently.
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Affiliation(s)
- Y F Li
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No 14, Section 3, Southern Renmin Road, Chengdu 610041, China
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Alghamdi HS, Junker R, Bronkhorst EM, Jansen JA. Bone regeneration related to calcium phosphate-coated implants in osteoporotic animal models: a meta-analysis. TISSUE ENGINEERING PART B-REVIEWS 2012; 18:383-95. [PMID: 22519708 DOI: 10.1089/ten.teb.2012.0130] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND Osteoporosis is a frequent human metabolic bone disorder. Prospectively, global ageing of populations will lead to a major increase of subjects being diagnosed with osteoporosis and in need for dental rehabilitation. However, as local osteoporosis of the jaws affects bone quantity and quality of edentulous regions, osseointegration of dental implants might be hampered. Consequently, calcium phosphate ceramic-coated implants have been suggested to compensate for low bone quantity/density and for impaired bone healing in osteoporosis. Nonetheless, up to now no meta-analytical assessment of the relevant preclinical literature to quantify such a possible positive effect has been undertaken. MATERIALS AND METHODS PubMed search, limited to animal models, to identify a possible positive effect of calcium phosphate-coated implants on bone regeneration, was carried out. Further, the reference lists of related review articles and publications selected for inclusion in this review were systematically screened. The primary outcome variables were bone-to-implant contact percentage as assessed histomorphometrically and mechanical stability testing. RESULTS The electronic search in the database of the National Library of Medicine resulted in the identification of 2704 titles. These titles were initially screened by the two independent reviewers for possible inclusion, resulting in further consideration of 51 publications. Screening the abstracts led to 22 full-text articles. From these articles, 16 reports were excluded. Finally, six of these original research reports could be selected for evaluation. Additionally, eight publications were identified by manual search. Thus, a total of 14 articles were included for analysis. CONCLUSIONS It was concluded that (1) in osteoporotic animal models calcium phosphate ceramic-coated implants are associated with improved bone-to-implant healing as compared to noncoated implants. Moreover, (2) essentially due to quality characteristics of the analyzed original research articles a negative impact of osteoporosis on bone-to-implant healing could not be confirmed. Besides, (3) the established positive bone-to-implant healing effect of calcium phosphate ceramic coatings does not differ between osteoporotic and nonosteoporotic, healthy animal models.
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Affiliation(s)
- Hamdan S Alghamdi
- Department of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
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Zhou C, Li Y, Wang X, Shui X, Hu J. 1,25Dihydroxy vitamin D(3) improves titanium implant osseointegration in osteoporotic rats. Oral Surg Oral Med Oral Pathol Oral Radiol 2012; 114:S174-8. [PMID: 23063395 DOI: 10.1016/j.oooo.2011.09.030] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2011] [Accepted: 09/21/2011] [Indexed: 10/28/2022]
Abstract
OBJECTIVE This study aimed to investigate the effects of 1,25(OH)(2)D(3) on implant osseointegration in osteoporotic rats. STUDY DESIGN Twelve weeks after bilateral ovariectomy, each rat had 2 titanium screws implanted in the proximal tibiae. All animals were then randomly divided into 2 groups: control (10 rats) and 1,25(OH)(2)D(3) (10 rats). 1,25(OH)(2)D(3) was administered through oral gavage at 0.1 μg/kg/d, and control animals were given vehicle. Eight weeks later, tibiae with screws were harvested for μCT, histologic, and biomechanical analysis. RESULTS Compared with control, 1,25(OH)(2)D(3) increased percent bone volume by 96.0%, percent osseointegration by 94.4%, mean trabecular number by 112.5%, mean trabecular thickness by 51.8%, trabecular connective density by 38.0%, and decreased trabecular separation by 39.3% in μCT analysis. The 1,25(OH)(2)D(3) increased bone area density by 1.2-fold and bone-to-implant contact by 1.5-fold in histomorphometry, and increased the maximal push-out force by 2.0-fold in biomechanical test. CONCLUSIONS The 1,25(OH)(2)D(3) improves implant osseointegration in osteoporotic rats.
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Affiliation(s)
- Chenchen Zhou
- Faculty, State Key Laboratory of Oral Diseases and Center of Orthognathic Surgery, Sichuan University, West China College of Stomatology, Chengdu, China
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Li Y, Li X, Song G, Chen K, Yin G, Hu J. Effects of strontium ranelate on osseointegration of titanium implant in osteoporotic rats. Clin Oral Implants Res 2011; 23:1038-44. [PMID: 22117625 DOI: 10.1111/j.1600-0501.2011.02252.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/23/2011] [Indexed: 01/12/2023]
Affiliation(s)
- Yunfeng Li
- The State Key Laboratory of Oral Diseases and Department of Oral and Maxillofacial Surgery; West China College of Stomatology; Sichuan University; Chengdu; China
| | - Xudong Li
- The State Key Laboratory of Oral Diseases and Department of Oral and Maxillofacial Surgery; West China College of Stomatology; Sichuan University; Chengdu; China
| | - Guodong Song
- The State Key Laboratory of Oral Diseases and Department of Oral and Maxillofacial Surgery; West China College of Stomatology; Sichuan University; Chengdu; China
| | - Kan Chen
- The State Key Laboratory of Oral Diseases and Department of Oral and Maxillofacial Surgery; West China College of Stomatology; Sichuan University; Chengdu; China
| | - Guozhu Yin
- The State Key Laboratory of Oral Diseases and Department of Oral and Maxillofacial Surgery; West China College of Stomatology; Sichuan University; Chengdu; China
| | - Jing Hu
- The State Key Laboratory of Oral Diseases and Department of Oral and Maxillofacial Surgery; West China College of Stomatology; Sichuan University; Chengdu; China
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In vivo preclinical evaluation of the influence of osteoporosis on the anchorage of different pedicle screw designs. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2011; 20:1289-96. [PMID: 21544593 DOI: 10.1007/s00586-011-1831-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Revised: 03/09/2011] [Accepted: 04/20/2011] [Indexed: 10/18/2022]
Abstract
We investigate the anchorage of pedicle screws with different surface treatments in osteoporotic bone. Eight ewes were divided into two groups of four animals each: four sheep underwent bilateral ovariectomy (OVX Group), whereas the operation was simulated in the remaining group (SHAM Group). Eighteen months after the first operation, the Dynesys(®) System was fitted to the sheep using pedicle screws with three different surface treatments: untreated, rough blasted (uncoated) and bioactive coated (bioactive). Uncoated screws showed a significantly higher bone ingrowth value compared with the untreated screws in the OVX group (9.3%, p < 0.005) and a significantly lower bone ingrowth value in the SHAM group (-11.0%, p < 0.05). Furthermore, the bioactive pedicle screws had a significant lower bone ingrowth value than the untreated screws in the SHAM group (-12.1%, p < 0.05). These results suggest that both tested surface treatments of pedicular screws may provide an advantage in terms of bone quality and osseointegration, when implanted in osteoporotic vertebrae.
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The effect of strontium-substituted hydroxyapatite coating on implant fixation in ovariectomized rats. Biomaterials 2010; 31:9006-14. [DOI: 10.1016/j.biomaterials.2010.07.112] [Citation(s) in RCA: 219] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Accepted: 07/31/2010] [Indexed: 11/17/2022]
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Mihranyan A, Forsgren J, Strømme M, Engqvist H. Assessing surface area evolution during biomimetic growth of hydroxyapatite coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:1292-1295. [PMID: 19115807 DOI: 10.1021/la803520k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The surface area of biomimetically deposited hydroxyapatite (HA) coatings on metallic implants is important for the biological performance of the implant. Thus, a nondestructive method of assessing this quantity directly on the solid substrate would be highly valuable. The objective of this study was to develop such a method and for the first time assess the evolution of surface area of HA during biomimetic growth. The surface area of a TiO2-covered titanium substrate was measured prior to and following the biomimetic coating deposition using Ar gas adsorption at 77 K. The presence of HA on the surface was verified with scanning electron microscopy and X-ray diffraction. The specific surface area of the coating was found to increase linearly during 1 week of deposition at a rate of approximately 100 cm2 day-1 (g substrate)-1. The presented method may be used as a tool for studying the evolution in surface area of coatings on solid substrates during biomimetic deposition or other growth processes.
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Affiliation(s)
- Albert Mihranyan
- Division for Nanotechnology and Functional Materials, Department of Engineering Sciences, The Angström Laboratory, Uppsala University, Box 534, 75121 Uppsala, Sweden.
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Reinwald S, Burr D. Review of nonprimate, large animal models for osteoporosis research. J Bone Miner Res 2008; 23:1353-68. [PMID: 18505374 PMCID: PMC2683153 DOI: 10.1359/jbmr.080516] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2007] [Revised: 05/07/2008] [Accepted: 05/23/2008] [Indexed: 11/18/2022]
Abstract
Large animal models are required for preclinical prevention and intervention studies related to osteoporosis research. The challenging aspect of this requirement is that no single animal model exactly mimics the progression of this human-specific chronic condition. There are pros and cons associated with the skeletal, hormonal, and metabolic conditions of each species that influence their relevance and applicability to human physiology. Of all larger mammalian species, nonhuman primates (NHPs) are preeminent in terms of replicating important aspects of human physiology. However, NHPs are very expensive, putting them out of reach of the vast majority of researchers. Practical, cost-effective alternatives to NHPs are sought after among ungulate (porcine, caprine, and ovine) and canine species that are the focus of this review. The overriding caveat to using large lower-order species is to take the time in advance to understand and appreciate the limitations and strengths of each animal model. Under these circumstances, experiments can be strategically designed to optimize the potential of an animal to develop the cardinal features of postmenopausal bone loss and/or yield information of relevance to treatment.
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Affiliation(s)
- Susan Reinwald
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.
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38
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Roy M, Vamsi Krishna B, Bandyopadhyay A, Bose S. Laser processing of bioactive tricalcium phosphate coating on titanium for load-bearing implants. Acta Biomater 2008; 4:324-33. [PMID: 18039597 DOI: 10.1016/j.actbio.2007.09.008] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2007] [Revised: 09/25/2007] [Accepted: 09/25/2007] [Indexed: 11/24/2022]
Abstract
Laser-engineered net shaping (LENS), a commercial rapid prototyping (RP) process, was used to coat titanium with tricalcium phosphate (TCP) ceramics to improve bone cell-materials interactions. During LENS coating process, the Nd:YAG laser melts the top surface of Ti substrate in which calcium phosphate powder is fed to create a TCP-Ti composite layer. It was found that an increase in laser power and/or powder feed rate increases the thickness of the coating. However, coating thickness decreased with increasing laser scan speed. TCP coating showed columnar titanium grains at the substrate side of the coating and transitioned to equiaxed titanium grains at the outside. When the scan speed was reduced from 15 to 10mms(-1), coating hardness increased from 882+/-67 to 1049+/-112Hv due to an increase in the volume fraction of TCP in the coating. Coated surfaces showed uniformly distributed TCP particles and X-ray diffraction data confirmed the absence of any undesirable phases, while maintaining a high level of crystallinity. The effect of TCP coating on cell-material interaction was examined by culturing osteoprecursor cells (OPC1) on coated surfaces. The results indicated that TCP coating had good biocompatibility where OPC1 cells attached and proliferated on the coating surface. The coating also initiated cell differentiation, ECM formation and biomineralization.
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39
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Borsari V, Fini M, Giavaresi G, Rimondini L, Consolo U, Chiusoli L, Salito A, Volpert A, Chiesa R, Giardino R. Osteointegration of titanium and hydroxyapatite rough surfaces in healthy and compromised cortical and trabecular bone: in vivo comparative study on young, aged, and estrogen-deficient sheep. J Orthop Res 2007; 25:1250-60. [PMID: 17474132 DOI: 10.1002/jor.20413] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The osteointegration rate of titanium (Ti; TI01) and duplex Ti plus HA (HT01) coating systems with high surface roughness was investigated in healthy, aged, and oestrogen-deficient sheep. After having evaluated the bone quality, TI01 and HT01 rods were implanted in the tibial diaphyses (two implants for each tibia) and epiphyses (1 implant for each tibia) of five young (YOUNG), five aged (AGED), and five aged and ovariectomized (OVX) sheep. The iliac crest trabecular bone volume (BV/TV) and number (Tb.N) in OVX sheep were respectively 33.5% and 28.5% lower than in YOUNG sheep (p < 0.005) and lower than in the AGED group (BV/TV, -17%; Tb.N, -13.5%; not significant); in the OVX group the trabecular separation was 77.9% higher than in YOUNG (p < 0.05) and 30.9% higher than in AGED animals. Lumbar vertebrae L5 bone mineral density was significantly lower in AGED (8.9%, p < 0.05) and OVX sheep (19.3%, p < 0.0005) when compared with YOUNG animals. Five samples of five sheep from each group were analyzed for each observation. At 3 months, in cortical bone both affinity index and pushout test results showed no significant differences between the two materials in each group of animals. In trabecular bone, the affinity index of HT01 was significantly higher than that of TI01 in each group of animals (YOUNG, 90.7%; AGED, 76.9%; OVX, 49.9%) with no significant differences between groups. In conclusion, the performance of TI01 and HT01 surfaces was high not only in YOUNG, but also in OVX animals and, therefore, they might be useful for aged and osteoporotic patients.
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Affiliation(s)
- Veronica Borsari
- Laboratory of Experimental Surgery, Research Institute Codivilla-Putti, Rizzoli Orthopaedic Institute, Bologna, Italy
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Bächle M, Hübner U, Kohal RJ, Han JS, Wiedmann-Al-Ahmad M. Structure and in vitro cytocompatibility of the gastropod shell of Helix pomatia. Tissue Cell 2006; 38:337-44. [PMID: 17010402 DOI: 10.1016/j.tice.2006.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2006] [Revised: 08/15/2006] [Accepted: 08/21/2006] [Indexed: 11/23/2022]
Abstract
Distinguishing features of biological constructions are high stability and adaptation to their environment. Beside biocompatibility, nontoxicity and degradability these characteristics are demanded for new biomaterials in the field of tissue engineering. This study investigated the chemical composition, the organization and the in vitro osteoconductive potential of the terrestrial gastropod shell (Helix pomatia) on CAL72 and human osteoblast-like cells. Chemical composition of the biomaterial was examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM) was performed to analyze the architecture of the snail shell and the morphology of the seeded cells. A double staining procedure (FDA/PI) and a proliferation test (EZ4U) assessed the viability of the cells. Microscopical images showed the multilayered architecture of the aragonite shell with hexagonal crystals on the inner side. The cells spread well on the biomaterial and the highest proliferation rate could be measured with CAL72 cells on the inner shell surface. The osteoconductive effects of this natural biomaterial could encourage further experiments in the field of tissue engineering.
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Affiliation(s)
- M Bächle
- Department of Prosthodontics, School of Dentistry, University Hospital Freiburg, Hugstetter Strasse 55, 79106 Freiburg, Germany.
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Koistinen A, Santavirta SS, Kröger H, Lappalainen R. Effect of bone mineral density and amorphous diamond coatings on insertion torque of bone screws. Biomaterials 2005; 26:5687-94. [PMID: 15878374 DOI: 10.1016/j.biomaterials.2005.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2004] [Accepted: 02/15/2005] [Indexed: 11/15/2022]
Abstract
In this study, the potential of high-quality amorphous diamond (AD) coatings in reducing the torque and failures of bone screws was studied. Torque values were recorded for 32 stainless steel screws, 2.7 or 3.5 mm in diameter and 60 mm in length. Half of the screw sets were coated with the AD coating before installing in predrilled holes of human cadaveric femoral bone samples. The bone samples were selected from two groups of four persons with mean ages of 34 years (range 25-41 years) and 75 years (range 73-77 years), respectively. The bone mineral density (BMD) values of the samples were determined exactly at the screw insertion site by peripheral quantitative computed tomography (pQCT). In the mechanical tests, insertion and removal torques were measured. BMD had a significant effect on insertion torque; the maximum torque (adjusted with respect to the screw diameter) was significantly higher for the young bone than for the old bone (p < 0.05). By using a polished AD coating, insertion torque was decreased even up to 50% in comparison with the screws without coating. The results suggest that AD coating provides a stable, smooth surface and reduces the risk of screw failures.
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Affiliation(s)
- Arto Koistinen
- Department of Applied Physics, University of Kuopio, PO Box 1627, FIN-70211 Kuopio, Finland.
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Yildirim OS, Aksakal B, Celik H, Vangolu Y, Okur A. An investigation of the effects of hydroxyapatite coatings on the fixation strength of cortical screws. Med Eng Phys 2005; 27:221-8. [PMID: 15694605 DOI: 10.1016/j.medengphy.2004.10.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2004] [Revised: 09/28/2004] [Accepted: 10/25/2004] [Indexed: 11/25/2022]
Abstract
Hydroxyapatite (HA) are commonly applied to orthopaedic implants for acceleration of osteointegration and so overcoming the loosening problems such as in cortical screws. Electrophoretic deposition (EPD) of hydroxyapatite was applied for coating of cortical screws in this work. The effects of hydroxyapatite-coated and uncoated cortical screws on insertion and extraction torque were investigated through in vivo experiments. Three groups of screws were undertaken: first group with no coating, second group coated with HA and the third group coated with HA+interlayer, a synthetic calcium silicate compound. Five sheep were operated, and 60 cortical (20 x 3) screws from those of groups were implanted in cortical femurs to observe the effect of HA and interlayer on screws. Results show that as an alternative to plasma spray coating method, the EPD process enables to produce a quick, easy, cheap and uniform adjustable coating layer. Also from biomechanical and SEM examinations, HA coating by EPD method of cortical screws resulted in extremely improved fixation with reduced risk of loosening problem.
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Affiliation(s)
- O S Yildirim
- Department of Orthopaedic, Faculty of Medicine, Atatürk University, Erzurum, Turkey
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43
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Fini M, Giavaresi G, Torricelli P, Borsari V, Giardino R, Nicolini A, Carpi A. Osteoporosis and biomaterial osteointegration. Biomed Pharmacother 2005; 58:487-93. [PMID: 15511604 DOI: 10.1016/j.biopha.2004.08.016] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2004] [Indexed: 01/02/2023] Open
Abstract
Biomaterial osteointegration depends not only on the properties of the implanted material but also on the characteristics and regenerative capability of the host bone. For this reason, researchers involved in biomaterial evaluation now place great importance on the various pathologies often present in orthopaedic patients which can negatively affect the success of surgical implants. Osteoporosis is undoubtedly one of the most frequently encountered of such diseases. Models reproducing the osteoporotic condition can be useful to understand the influence of the pathology on cell behaviour, bone regeneration and osteointegration processes, thus increasing our basic knowledge and allowing the development of surgical techniques and implant biomaterials more suitable for use in the surgical treatment of fractures in osteoporotic patients. The present paper is a literature review and, after a short description of how the presence of osteoporosis could influence bone regenerative processes, the results of the main studies on biomaterial biocompatibility and osteointegration both in vitro and in vivo in the presence of osteoporotic condition are reported. Both cell cultures and animal models are able to demonstrate the different response of bone to biomaterials by comparing healthy and pathological conditions. The use of pathological bone-derived cells and pathological animals is therefore recommended to test candidate orthopaedic materials.
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Affiliation(s)
- M Fini
- Experimental Surgery Department, Research Institute Codivilla Putti, Rizzoli Orthopaedic Institute, Via di Barbiano, 1/10, 40136 Bologna, Italy.
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Koistinen A, Santavirta S, Lappalainen R. Apparatus to test insertion and removal torque of bone screws. Proc Inst Mech Eng H 2004; 217:503-8. [PMID: 14702987 DOI: 10.1243/09544110360729135] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This paper describes affordable equipment for testing bone screw torque, corresponding to ASTM standard F543-00 for testing metallic medical bone screws. Correct testing of thin and long bone screws is essential due to screw failures during insertion and removal of the screws. Furthermore, insertion torque is an important factor in predicting fixation strength, screw pull-out force and effects of surface treatment of screws. The capability of the custom-built tester was determined using polytetrafluoroethylene and wood disc samples and bone screws. Bovine cortical bones allowed testing to the failure limit, i.e. the torque increased in long screws to the fracture limit. For 2.7 and 3.5 mm thick self-tapping cortical bone screws, the failure torques were 30-50 per cent higher than the minimum values required by the standard (1.0 and 2.3 N m respectively). The equipment provided reproducible results and fulfilled the ASTM standard very well. Preliminary testing with amorphous diamond coated bone screws showed good durability of the coating and on average 10-15 per cent lower torque values compared with uncoated screws. The equipment can be used to measure insertion and removal torques as described in the standard. Furthermore, it also allows testing of normal screws and bolts.
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Affiliation(s)
- A Koistinen
- Department of Applied Physics, University of Kuopio, Kuopio, Finland
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45
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Fini M, Savarino L, Nicoli Aldini N, Martini L, Giavaresi G, Rizzi G, Martini D, Ruggeri A, Giunti A, Giardino R. Biomechanical and histomorphometric investigations on two morphologically differing titanium surfaces with and without fluorohydroxyapatite coating: an experimental study in sheep tibiae. Biomaterials 2003; 24:3183-92. [PMID: 12763445 DOI: 10.1016/s0142-9612(03)00164-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The influence of fluorohydroxyapatite (FHA) coating and surface roughness of Ti6Al4V implants on bone response was investigated. Uncoated and FHA-coated screws with lower (LR and LR+FHA; Ra: 5.7+/-0.2 microm) and higher (HR and HR+FHA; Ra: 21.8+/-0.9 microm) surface roughness, were inserted into the diaphyses of 8 sheep tibiae. Twelve weeks after implantation, extraction torque and bone-to-implant contact were evaluated. The smoothest surfaces showed an improved extraction torque and significant differences were observed between LR and HR (-24.6%, p<0.0005), LR and HR+FHA (-30.7%, p<0.0005), LR+FHA and HR (-17.4%, p<0.005), and LR+FHA and HR+FHA (-24.0%, p<0.005). The bone-to-implant contact data paralleled the biomechanical data: the smoother the surface, the greater the bone-to-implant contact. Significant (p<0.0005) decreases in bone-to-implant contact were observed between LR+FHA and HR (-24.2%), and between LR+FHA and HR+FHA (-29.2%). The current findings suggest that LR surfaces significantly improve the osteointegration rate of implanted cortical screws independently of the FHA coating.
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Affiliation(s)
- M Fini
- Experimental Surgery Department, Codivilla-Putti Research Institute, Rizzoli Orthopaedic Institute, via di Barbiano 1/10, 40136 Bologna, Italy.
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Aldini NN, Fini M, Giavaresi G, Martini L, Dubini B, Ponzi Bossi MG, Rustichelli F, Krajewski A, Ravaglioli A, Mazzocchi M, Giardino R. Osteointegration of bioactive glass-coated and uncoated zirconia in osteopenic bone: Anin vivo experimental study. ACTA ACUST UNITED AC 2003; 68:264-72. [PMID: 14704968 DOI: 10.1002/jbm.a.20057] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In elderly and osteoporotic patients an age-related loss of osteoinductivity could be the biological cause of implant failure regardless of the high quality of the implanted device. yttria stabilized tetragonal zirconia (YSTZ), either coated with the bioactive glass named RKKP bioglaze (RKKP) or uncoated, was implanted in the distal femurs of sham-operated and ovariectomized female rats. Animals were sacrificed at 30 and 60 days. Histomorphometry and microhardness tests were performed to assess osteointegration rate as well as bone quality around the implants. Significant decreases (p < 0.0005) in trabecular bone volume, BV/TV (41%), trabecular bone surface BS/TV (33%), trabecular thickness Tb.Th (20%), and trabecular number Tb.N (32%), together with a significant increase in trabecular separation Tb.Sp (184%), were found for the osteopenic rats compared with the sham-operated rats. At both experimental times the RKKP coating ensured a better osteointegration rate with higher AI values than the uncoated YSTZ, even when osteopenic rats were used (48% at 30 days and 12% at 60 days). No differences were observed at the bone-biomaterial interfaces for either material when comparing sham-operated with osteopenic rats. The present results demonstrate that the RKKP bioactive glass used as a coating ensures a high osteointegration rate even in osteoporotic bone, which is already visible from postoperative day 30 and is still apparent on day 60.
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Affiliation(s)
- N Nicoli Aldini
- Experimental Surgery Department, Research Institute Codivilla Putti-Rizzoli Orthopaedic Institute, via di Barbiano 1/10, 40136, Bologna, Italy and University of Bologna Medical School, Bologna, Italy
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Aldini NN, Fini M, Giavaresi G, Giardino R, Greggi T, Parisini P. Pedicular fixation in the osteoporotic spine: a pilot in vivo study on long-term ovariectomized sheep. J Orthop Res 2002; 20:1217-24. [PMID: 12472232 DOI: 10.1016/s0736-0266(02)00069-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Spinal instrumentation success is greatly affected by the presence of osteoporosis. To date, however, no data exist on in vivo investigations on biomaterial and surgical techniques in the osteoporotic spine. In the present study 24 uncoated and 24 HA-coated screws were implanted in the L3, L4 and L5 pedicles of eight sheep (four ovariectomized, OVX Group; four sham-operated, Control Group). At four months, uncoated screws showed a significant decrease of about -22% in the extraction torque of the OVX Group as compared to the Control Group (p < 0.005). The extraction torque of HA-coated screws significantly (p < 0.0005) improved in both groups when compared to that of uncoated screws and showed increases ranging from 133% to 157%. Pedicle trabecular bone of OVX sheep showed a significant decrease in BV/TV (-30%; p < 0.05) and Tb.Th (-33%; p < 0.01). The affinity index (AI) results revealed significant (p < 0.0005) differences between uncoated and HA-coated screws for both groups: values were lower for uncoated than HA-coated screws by about -35%. A significant difference was also found for the AI data of uncoated screws between the OVX and Control Groups (-13%, p < 0.005). The current findings have demonstrated that long-term ovariectomized sheep can be used to study in vivo osteointegration in the osteoporotic spine. The HA coating has proven to improve bone purchase and bone-screw interface strength in healthy and osteopenic animals.
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Affiliation(s)
- N Nicoli Aldini
- Department of Experimental Surgery, Research Institute Codivilla-Putti, Rizzoli Orthopaedic Institute, via di Bambino, 1110-40136 Bologna, Italy
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