1
|
Çamili Y, Malkoç S, Taşlidere A, Ileri Z, Guler OC. Effects of teriparatide on bone formation in rats with experimentally induced premaxillary expansion. Dental Press J Orthod 2022; 27:e2220370. [PMID: 35792789 PMCID: PMC9255964 DOI: 10.1590/2177-6709.27.3.e2220370.oar] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 07/14/2021] [Indexed: 11/22/2022] Open
Abstract
Objective: This study aimed to evaluate the effects of systemic teriparatide on sutural bone formation after premaxillary suture expansion in rats. Material and Methods: Twenty Wistar male rats (8-10 weeks old) were randomly divided into two groups, namely, control (C, n=10) and teriparatide (T, n=10). An expansion force was applied to the maxillary incisors using helical spring for a seven-day expansion period, for both groups. On the eighth day, the rats were kept for a seven-day consolidation period, and then 60 µg/kg teriparatide (once a day) was administered to group T subcutaneously for seven days. Then, all the rats were sacrificed, and histological sections were stained with hemotoxylin-eosin for examination. Anti-osteonectin, anti-osteocalcin, anti-Vascular endothelial growth factor (VEGF) and anti-transforming growth factor beta (TGF-β) were evaluated by immunohistochemical analysis in the midpalatal suture area. Results: Histologically, the newly formed bone tissue was observed to be larger in group T than in group C. The number of immunoreactive osteoblasts for osteonectin, osteocalcin and VEGF antibodies was significantly higher in group T than in group C (p = 0.0001). The TGF-β antibody showed a mild reaction in group T, but did not reach significance in comparison with group C (p ˃ 0.05). Conclusion: Systemic teriparatide application following the premaxillary expansion of the suture area may stimulate bone formation and add to the consolidation of the expansion in rats by regulating osteonectin, osteocalcin and VEGF.
Collapse
Affiliation(s)
| | | | - Aslı Taşlidere
- İnönü University, Faculty of Medicine, Department of Histology and Embriology (Malatya, Turkey)
| | - Zehra Ileri
- Selçuk University, Faculty of Dentistry, Department of Orthodontics (Konya, Turkey)
| | - Ozge Celik Guler
- Çanakkale Onsekiz Mart University, Faculty of Dentistry, Department of Orthodontics (Çanakkale, Turkey)
| |
Collapse
|
2
|
Mohammadi A, Dehkordi NR, Mahmoudi S, Rafeie N, Sabri H, Valizadeh M, Poorsoleiman T, Jafari A, Mokhtari A, Khanjarani A, Salimi Y, Mokhtari M, Deravi N. Effects of Drugs and Chemotherapeutic Agents on Dental Implant Osseointegration: Narrative Review. Curr Rev Clin Exp Pharmacol 2022; 19:CRCEP-EPUB-124232. [PMID: 35674294 DOI: 10.2174/2772432817666220607114559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 01/27/2022] [Accepted: 03/03/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND Dental implants have been one of the most popular treatments for rehabilitating individuals with single missing teeth or fully edentulous jaws since their introduction. As more implant patients are well-aged and take several medications due to various systemic conditions, clinicians should be mindful of possible drug implications on bone remodeling and osseointegration. OBJECTIVE The present study aims to study and review some desirable and some unwelcomed implications of medicine on osseointegration. METHODS A broad search for proper relevant studies were conducted in four databases, including Web of Science, Pubmed, Scopus, and Google Scholar. RESULTS Some commonly prescribed medicines such as nonsteroidal anti-inflammatory drugs (NSAIDs), glucocorticoids, proton pump inhibitors (PPIs), selective serotonin reuptake inhibitors (SSRIs), anticoagulants, metformin, and chemotherapeutic agents may jeopardize osseointegration. On the contrary, some therapeutic agents such as anabolic, anti-catabolic, or dual anabolic and anti-catabolic agents may enhance osseointegration and increase the treatment's success rate. CONCLUSION Systemic medications that enhance osseointegration include mineralization promoters and bone resorption inhibitors. On the other hand, medications often given to the elderly with systemic problems might interfere with osseointegration, leading to implant failure. However, to validate the provided research, more human studies with a higher level of evidence are required.
Collapse
Affiliation(s)
- Aida Mohammadi
- Dental Materials Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Nazanin Roqani Dehkordi
- Department of Periodontology, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Sadaf Mahmoudi
- Department of Endodontics, School of Dentistry, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
| | - Niyousha Rafeie
- Dental Research Center, Dentistry Research Institute, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamoun Sabri
- Research Center, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Valizadeh
- Student Research Committee, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Taniya Poorsoleiman
- Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Aryan Jafari
- Dental Materials Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Alireza Mokhtari
- Student Research Committee, Dental Faculty, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Arshia Khanjarani
- Student Research Committee, Dental Faculty, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Yasaman Salimi
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Melika Mokhtari
- Student Research Committee, Dental Faculty, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Niloofar Deravi
- Student Research Committee, School of Medicine, Shahid Beheshti University of Medical sciences, Tehran, Iran
| |
Collapse
|
3
|
Zou Z, Wang L, Zhou Z, Sun Q, Liu D, Chen Y, Hu H, Cai Y, Lin S, Yu Z, Tan B, Guo W, Ling Z, Zou X. Simultaneous incorporation of PTH(1-34) and nano-hydroxyapatite into Chitosan/Alginate Hydrogels for efficient bone regeneration. Bioact Mater 2021; 6:1839-1851. [PMID: 33336115 PMCID: PMC7723774 DOI: 10.1016/j.bioactmat.2020.11.021] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/21/2020] [Accepted: 11/13/2020] [Indexed: 12/19/2022] Open
Abstract
Tissue regeneration based on the utilization of artificial soft materials is considered a promising treatment for bone-related diseases. Here, we report cranial bone regeneration promoted by hydrogels that contain parathyroid hormone (PTH) peptide PTH(1-34) and nano-hydroxyapatite (nHAP). A combination of the positively charged natural polymer chitosan (CS) and negatively charged sodium alginate led to the formation of hydrogels with porous structures, as shown by scanning electron microscopy. Rheological characterizations revealed that the mechanical properties of the hydrogels were almost maintained upon the addition of nHAP and PTH(1-34). In vitro experiments showed that the hydrogel containing nHAP and PTH(1-34) exhibited strong biocompatibility and facilitated osteogenic differentiation of rat bone marrow mesenchymal stem cells (rBMSCs) via the Notch signaling pathway, as shown by the upregulated expression of osteogenic-related proteins. We found that increasing the content of PTH(1-34) in the hydrogels resulted in enhanced osteogenic differentiation of BMSCs. Implantation of the complex hydrogel into a rat cranial defect model led to efficient bone regeneration compared to the rats treated with the hydrogel alone or with nHAP, indicating the simultaneous therapeutic effect of nHAP and PTH during the treatment process. Both the in vitro and in vivo results demonstrated that simultaneously incorporating nHAP and PTH into hydrogels shows promise for bone regeneration, suggesting a new strategy for tissue engineering and regeneration in the future.
Collapse
Affiliation(s)
- Zhiyuan Zou
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Le Wang
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Zhifei Zhou
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Qing Sun
- Department of Pathology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou 510120, China
| | - Delong Liu
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
- Department of Orthopaedics, Hunan Provincial People's Hospital, Changsha 410002, China
| | - Yan Chen
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Hao Hu
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Yu Cai
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen, 518132, China
| | - Sixiong Lin
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Zhengran Yu
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Bizhi Tan
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Wei Guo
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Zemin Ling
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Xuenong Zou
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| |
Collapse
|
4
|
Mahri M, Shen N, Berrizbeitia F, Rodan R, Daer A, Faigan M, Taqi D, Wu KY, Ahmadi M, Ducret M, Emami E, Tamimi F. Osseointegration Pharmacology: A Systematic Mapping Using Artificial Intelligence. Acta Biomater 2021; 119:284-302. [PMID: 33181361 DOI: 10.1016/j.actbio.2020.11.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 11/04/2020] [Accepted: 11/05/2020] [Indexed: 12/25/2022]
Abstract
Clinical performance of osseointegrated implants could be compromised by the medications taken by patients. The effect of a specific medication on osseointegration can be easily investigated using traditional systematic reviews. However, assessment of all known medications requires the use of evidence mapping methods. These methods allow assessment of complex questions, but they are very resource intensive when done manually. The objective of this study was to develop a machine learning algorithm to automatically map the literature assessing the effect of medications on osseointegration. Datasets of articles classified manually were used to train a machine-learning algorithm based on Support Vector Machines. The algorithm was then validated and used to screen 599,604 articles identified with an extremely sensitive search strategy. The algorithm included 281 relevant articles that described the effect of 31 different drugs on osseointegration. This approach achieved an accuracy of 95%, and compared to manual screening, it reduced the workload by 93%. The systematic mapping revealed that the treatment outcomes of osseointegrated medical devices could be influenced by drugs affecting homeostasis, inflammation, cell proliferation and bone remodeling. The effect of all known medications on the performance of osseointegrated medical devices can be assessed using evidence mappings executed with highly accurate machine learning algorithms.
Collapse
|
5
|
Lv Z, Muheremu A, Bai X, Zou X, Lin T, Chen B. PTH(1‑34) activates the migration and adhesion of BMSCs through the rictor/mTORC2 pathway. Int J Mol Med 2020; 46:2089-2101. [PMID: 33125102 PMCID: PMC7595657 DOI: 10.3892/ijmm.2020.4754] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 07/09/2020] [Indexed: 12/23/2022] Open
Abstract
The ability of intermittent parathyroid hormone (1-34) [PTH(1-34)] treatment to enhance bone-implant osseo-integration was recently demonstrated in vivo. However, the mechanisms through which PTH (1-34) regulates bone marrow-derived stromal cells (BMSCs) remain unclear. The present study thus aimed to investigate the effects of PTH(1-34) on the migration and adhesion of, and rictor/mammalian target of rapamycin complex 2 (mTORC2) signaling in BMSCs. In the present study, BMSCs were isolated from Sprague-Dawley rats treated with various concentrations of PTH(1-34) for different periods of time. PTH(1-34) treatment was performed with or without an mTORC1 inhibitor (20 nM rapamycin) and mTORC1/2 inhibitor (10 µM PP242). Cell migration was assessed by Transwell cell migration assays and wound healing assays. Cell adhesion and related mRNA expression were investigated through adhesion assays and reverse transcription-quantitative polymerase chain reaction (RT-qPCR), respectively. The protein expression of chemokine receptors (CXCR4 and CCR2) and adhesion factors [intercellular adhesion molecule 1 (ICAM-1), fibronectin and integrin β1] was examined by western blot analysis. The results revealed that various concentrations (1, 10, 20, 50 and 100 nM) of PTH(1-34) significantly increased the migration and adhesion of BMSCs, as well as the expression of CXCR4, CCR2, ICAM-1, fibronectin and integrin β1. In addition, the p-Akt and p-S6 levels were also upregulated by PTH(1-34). BMSCs subjected to mTORC1/2 signaling pathway inhibition or rictor silencing exhibited a markedly reduced PTH-induced migration and adhesion, while no such effect was observed for the BMSCs subjected to mTORC1 pathway inhibition or raptor silencing. These results indicate that PTH(1-34) promotes BMSC migration and adhesion through rictor/mTORC2 signaling in vitro. Taken together, the results of the present study reveal an important mechanism for the therapeutic effects of PTH(1-34) on bone-implant osseointegration and suggest a potential treatment strategy based on the effect of PTH(1-34) on BMSCs.
Collapse
Affiliation(s)
- Zhong Lv
- Department of Orthopedics, Guangzhou Panyu Central Hospital, Guangzhou, Guangdong 510080, P.R. China
| | | | - Xiaochun Bai
- Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xuenong Zou
- Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Tao Lin
- Department of Orthopedics, Zhujiang Hospital of Southern Medical University, Guangzhou, Guangdong 510280, P.R. China
| | - Bailing Chen
- Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
| |
Collapse
|
6
|
Dam C, Jung UW, Park KM, Huh J, Park W. Effect of teriparatide on early sinus graft healing in the ovariectomized rabbit. Clin Oral Implants Res 2019; 31:264-273. [PMID: 31837052 DOI: 10.1111/clr.13565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 11/21/2019] [Accepted: 12/03/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The purpose of this study was to determine the effect of administering intermittent parathyroid hormone 1-34 [teriparatide, (PTH)] on the maxillary sinus lift and bone grafting in osteoporotic rabbits induced by ovariectomy and glucocorticoid. MATERIALS AND METHODS Ovariectomies were performed on 20 female New Zealand white rabbits that were randomly divided into two groups: (a) the PTH group (n = 10), in which 10 μg kg-1 day-1 PTH was injected subcutaneously 5 days a week for 5 weeks (from 1 week before until 4 weeks after sinus surgery), and (b) the saline group (n = 10), in which saline substituted PTH at the same dose, mode of administration, and duration. Bone grafting with bovine bone mineral was augmented into 13 sinuses, and bone grafts and implants were simultaneously performed in seven sinuses, in both groups. Animals were sacrificed at 4 weeks after surgery. To determine whether PTH was an effective treatment for osteoporosis, we measured the bone mineral density (BMD) of the right femur using micro-computed tomography and performed radiographic and histometric analyses of the maxillary sinus surgery site. The Mann-Whitney test was used for statistical analysis. RESULTS It was found that BMD increased in the femur, whereas none of the radiographic and histometric parameters differed significantly between the groups in the sinus, while there were large interindividual variations within groups. CONCLUSIONS These findings suggest that intermittent PTH does not promote new bone formation in the augmented maxillary sinus of ovariectomized rabbits.
Collapse
Affiliation(s)
- Chugeum Dam
- Department of Advanced General Dentistry, College of Dentistry, Yonsei University, Seoul, Korea
| | - Ui-Won Jung
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul, Korea
| | - Kyeong-Mee Park
- Department of Advanced General Dentistry, Human Identification Research Institute, Yonsei University College of Dentistry, Seoul, Korea
| | - Jisun Huh
- Department of Dental Education, Yonsei University College of Dentistry, Seoul, Korea
| | - Wonse Park
- Department of Advanced General Dentistry, College of Dentistry, Yonsei University, Seoul, Korea
| |
Collapse
|
7
|
Cai L, Zhang D, Liu W, Cui Y, Jing J, Xie J, Zhou X. Effects of parathyroid hormone (1-34) on the regulation of the lysyl oxidase family in ovariectomized mice. RSC Adv 2018; 8:30629-30641. [PMID: 35546858 PMCID: PMC9087977 DOI: 10.1039/c8ra04574g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 08/13/2018] [Indexed: 02/05/2023] Open
Abstract
Osteoporosis (OP) is a highly prevalent chronic disease. The anabolic agent parathyroid hormone (PTH) is often prescribed for the treatment of OP to strengthen bone quality and decrease the risk of fracture, although the specific mechanisms are still unclear. Lysyl oxidase (LOX) can stabilize the organic matrix through catalyzing the cross-linking of collagen and elastin. In this study, we established osteoporotic models via ovariectomizing C57BL/6J mice and treating them with PTH. We further aimed to determine the expression changes of the LOX family, impacted by PTH, in ovariectomized mice. We observed that bone mass was reduced and bone microstructure was deteriorative in ovariectomized mice. And PTH attenuated the microstructural damage and accelerated bone remodeling, as confirmed via μCT and HE staining. Serum levels of copper and zinc indirectly proved the results. The expression levels of five members of the LOX family all declined in ovariectomized mice compared to in sham-operated control mice (p < 0.05), and the daily injection of PTH successfully reversed the low expression of LOXs in OP. The current study examined expression changes of LOXs in osteoporotic mice and PTH-treated osteoporotic mice for the first time, and provided an important piece of evidence that the aberrant expression of LOXs had intimate associations with the occurrence and development of OP. And LOXs may act as the downstream effectors of PTH, contributing to unbalanced bone metabolism and damaged bone microstructure. Consequently, LOXs may act as promising therapeutic targets for OP. LOX family is a potential target in ovariectomized osteoporosis (OP).![]()
Collapse
Affiliation(s)
- Linyi Cai
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu
- China
| | - Demao Zhang
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu
- China
| | - Wenjing Liu
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu
- China
| | - Yujia Cui
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu
- China
| | - Junjun Jing
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu
- China
| | - Jing Xie
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu
- China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases
- West China Hospital of Stomatology
- Sichuan University
- Chengdu
- China
| |
Collapse
|
8
|
Auersvald CM, Santos FR, Nakano MM, Leoni GB, de Sousa Neto MD, Scariot R, Giovanini AF, Deliberador TM. The local administration of parathyroid hormone encourages the healing of bone defects in the rat calvaria: Micro-computed tomography, histological and histomorphometric evaluation. Arch Oral Biol 2017; 79:14-19. [PMID: 28282513 DOI: 10.1016/j.archoralbio.2017.02.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 02/14/2017] [Accepted: 02/14/2017] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To evaluate the effect of a single-dose local administration of PTH on bone healing in rat calvarial bone defects by means of micro-computed tomography, histological and histomorphometric analysis. DESIGN Critical-size cranial osteotomy defects were created in 42 male rats. The animals were randomly divided into 3 groups. In the C Group, the bone defect was only filled with a blood clot. In the S Group, it was filled with a collagen sponge and covered with bovine cortical membrane. In the PTH Group, the defect was filled with a collagen sponge soaked with PTH and covered with bovine cortical membrane. The groups were further split in two for euthanasia 15 and 60days post-surgery. Data was statistically analyzed with t-tests for independent samples or the nonparametric Mann-Whitney test when applicable. Intragroup comparisons were analyzed with paired t-tests (p<0.05). RESULTS Micro-CT analysis results did not demonstrate statistically significant intergroup differences. At 15days post-surgery, the histomorphometric analysis showed that the PTH Group exhibited a significantly higher percentage of bone formation compared with the S Group. At 60days post-surgery, a higher percentage of new bone was observed in the PTH group. CONCLUSION The results suggest that the local administration of PTH encouraged the bone healing in critical-size calvarial defects in rats.
Collapse
Affiliation(s)
- Caroline Moreira Auersvald
- Graduate Program in Dentistry, Universidade Positivo, R. Prof. Pedro Viriato Parigot de Souza, 5300 - Cidade Industrial, Curitiba, PR, 81280-330, Brazil
| | - Felipe Rychuv Santos
- Graduate Program in Dentistry, Universidade Positivo, R. Prof. Pedro Viriato Parigot de Souza, 5300 - Cidade Industrial, Curitiba, PR, 81280-330, Brazil
| | - Mayara Mytie Nakano
- Graduate Program in Dentistry, Universidade Positivo, R. Prof. Pedro Viriato Parigot de Souza, 5300 - Cidade Industrial, Curitiba, PR, 81280-330, Brazil
| | - Graziela Bianchi Leoni
- Departamento de Odontologia Restauradora, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/no - Campus da USP Ribeirão Preto, SP, CEP 14040-904, Brazil
| | - Manoel Damião de Sousa Neto
- Departamento de Odontologia Restauradora, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/no - Campus da USP Ribeirão Preto, SP, CEP 14040-904, Brazil
| | - Rafaela Scariot
- Graduate Program in Dentistry, Universidade Positivo, R. Prof. Pedro Viriato Parigot de Souza, 5300 - Cidade Industrial, Curitiba, PR, 81280-330, Brazil
| | - Allan Fernando Giovanini
- Graduate Program in Dentistry, Universidade Positivo, R. Prof. Pedro Viriato Parigot de Souza, 5300 - Cidade Industrial, Curitiba, PR, 81280-330, Brazil
| | - Tatiana Miranda Deliberador
- Graduate Program in Dentistry, Universidade Positivo, R. Prof. Pedro Viriato Parigot de Souza, 5300 - Cidade Industrial, Curitiba, PR, 81280-330, Brazil.
| |
Collapse
|
9
|
Chen B, Lin T, Yang X, Li Y, Xie D, Zheng W, Cui H, Deng W, Tan X. Low-magnitude, high-frequency vibration promotes the adhesion and the osteogenic differentiation of bone marrow-derived mesenchymal stem cells cultured on a hydroxyapatite-coated surface: The direct role of Wnt/β-catenin signaling pathway activation. Int J Mol Med 2016; 38:1531-1540. [PMID: 28026000 DOI: 10.3892/ijmm.2016.2757] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 09/07/2016] [Indexed: 11/05/2022] Open
Abstract
The positive effect of low-magnitude, high‑frequency (LMHF) vibration on implant osseointegration has been demonstrated; however, the underlying cellular and molecular mechanisms remain unknown. The aim of this study was to explore the effect of LMHF vibration on the adhesion and the osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) cultured on hydroxyapatite (HA)-coated surfaces in an in vitro model as well as to elucidate the molecular mechanism responsible for the effects of LMHF vibration on osteogenesis. LMHF vibration resulted in the increased expression of fibronectin, which was measured by immunostaining and RT-qPCR. Stimulation of BMSCs by LMHF vibration resulted in the rearrangement of the actin cytoskeleton with more prominent F-actin. Moreover, the expression of β1 integrin, vinculin and paxillin was notably increased following LMHF stimulation. Scanning electron microscope observations revealed that there were higher cell numbers and more extracellular matrix attached to the HA-coated surface in the LMHF group. Alkaline phosphatase activity as well as the expression of osteogenic-specific genes, namely Runx2, osterix, collagen I and osteocalcin, were significantly elevated in the LMHF group. In addition, the protein expression of Wnt10B, β-catenin, Runx2 and osterix was increased following exposure to LMHF vibration. Taken together, the findings of this study indicate that LMHF vibration promotes the adhesion and the osteogenic differentiation of BMSCs on HA-coated surfaces in vitro, and LMHF vibration may directly induce osteogenesis by activating the Wnt/β‑catenin signaling pathway. These data suggest that LMHF vibration enhances the osseointegration of bone to a HA-coated implant, and provide a scientific foundation for improving bone-implant osseointegration through the application of LMHF vibration.
Collapse
Affiliation(s)
- Bailing Chen
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Tao Lin
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xiaoxi Yang
- Department of Spine Surgery, Chinese PLA General Hospital (301 Hospital), Beijing 100853, P.R. China
| | - Yiqiang Li
- Department of Orthopedics, Guangzhou Women and Children's Medical Center, Guangzhou, Guangdong 510623, P.R. China
| | - Denghui Xie
- Department of Spine Surgery, The Third Affiliated Hospital of Southern Medical University (Academy of Orthopedics), Guangzhou, Guangdong 510630, P.R. China
| | - Wenhui Zheng
- Department of Physiology, Zhongshan School of Medicine of Sun Yat-sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Haowen Cui
- Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Weimin Deng
- Department of Rehabilitation, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong 510000, P.R. China
| | - Xin Tan
- Department of Rehabilitation, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong 510000, P.R. China
| |
Collapse
|
10
|
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: 27] [Impact Index Per Article: 3.0] [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.
Collapse
|
11
|
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: 30] [Impact Index Per Article: 3.3] [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.
Collapse
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
| |
Collapse
|
12
|
Kuroshima S, Yasutake M, Tsuiki K, Nakano T, Sawase T. Structural and Qualitative Bone Remodeling Around Repetitive Loaded Implants in Rabbits. Clin Implant Dent Relat Res 2015; 17 Suppl 2:e699-710. [DOI: 10.1111/cid.12318] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shinichiro Kuroshima
- Department of Applied Prosthodontics; Graduate School of Biomedical Sciences; Nagasaki University; Nagasaki Japan
| | - Munenori Yasutake
- Department of Applied Prosthodontics; Graduate School of Biomedical Sciences; Nagasaki University; Nagasaki Japan
| | - Kotaro Tsuiki
- Department of Applied Prosthodontics; Graduate School of Biomedical Sciences; Nagasaki University; Nagasaki Japan
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering; Osaka University; Osaka Japan
| | - Takashi Sawase
- Department of Applied Prosthodontics; Graduate School of Biomedical Sciences; Nagasaki University; Nagasaki Japan
| |
Collapse
|
13
|
Liang Y, Li H, Xu J, Li X, Li X, Yan Y, Qi M, Hu M. Strontium coating by electrochemical deposition improves implant osseointegration in osteopenic models. Exp Ther Med 2014; 9:172-176. [PMID: 25452797 PMCID: PMC4247308 DOI: 10.3892/etm.2014.2038] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Accepted: 10/03/2014] [Indexed: 12/17/2022] Open
Abstract
Osteopenia, a preclinical state of osteoporosis, restricts the application of adult orthodontic implant anchorage and tooth implantation. Strontium (Sr) is able to promote bone formation and inhibit bone absorption. The aim of the present study was to evaluate a new method for improving the success rate of dental implantation. In this study, an electrochemical deposition (ECD) method was used to prepare a Sr coating on a titanium implant. The coating composition was investigated by energy dispersive X-ray spectroscopy and X-ray diffraction, and the surface morphology of the coating was studied using scanning electron microscopy. A total of 24 Sprague-Dawley rats received bilateral ovariectomy (OVX) and an additional 12 rats underwent a sham surgery. All rats were then implanted in the bilateral tibiae with titanium mini-implants with or without a Sr coating. The results of histological examination and a fluorescence double labeling assay showed strong new bone formation with a wider zone between the double labels, a higher rate of bone mineralization and better osseointegration in the OVX rats that received Sr-coated implants compared with the OVX rats that received uncoated implants. The study indicates that Sr coatings are easily applied by an ECD method, and that Sr coatings have a promoting effect on implant osseointegration in animals with osteopenia.
Collapse
Affiliation(s)
- Yongqiang Liang
- College of Stomatology, Hebei United University, Tangshan, Hebei 063000, P.R. China ; Department of Stomatology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Haoyan Li
- College of Stomatology, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Jiang Xu
- Department of Stomatology, People's Hospital of Tongchuan, Shaanxi 727000, P.R. China
| | - Xin Li
- College of Stomatology, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Xinchang Li
- College of Stomatology, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Yuting Yan
- College of Stomatology, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Mengchun Qi
- College of Stomatology, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Min Hu
- Department of Stomatology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| |
Collapse
|
14
|
Liang YQ, Qi MC, Xu J, Xu J, Liu HW, Dong W, Li JY, Hu M. Low-magnitude high-frequency loading, by whole-body vibration, accelerates early implant osseointegration in ovariectomized rats. Mol Med Rep 2014; 10:2835-42. [PMID: 25270245 PMCID: PMC4227418 DOI: 10.3892/mmr.2014.2597] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Accepted: 07/04/2014] [Indexed: 01/12/2023] Open
Abstract
Osteoporosis deteriorates jaw bone quality and may compromise early implant osseointegration and early implant loading. The influence of low-magnitude, high-frequency (LMHF) vibration on peri-implant bone healing and implant integration in osteoporotic bones remains poorly understood. LMHF loading via whole-body vibration (WBV) for 8 weeks has previously been demonstrated to significantly enhance bone-to-implant contact, peri-implant bone fraction and implant mechanical properties in osteoporotic rats. In the present study, LMHF loading by WBV was performed in osteoporotic rats, with a loading duration of 4 weeks during the early stages of bone healing. The results indicated that 4-week LMHF loading by WBV partly reversed the negative effects of osteoporosis and accelerated early peri-implant osseointegration in ovariectomized rats.
Collapse
Affiliation(s)
- Yong-Qiang Liang
- Department of Stomatology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Meng-Chun Qi
- College of Stomatology, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Jiang Xu
- Department of Stomatology, Tongchuan City People's Hospital, Tongchuan, Shaanxi 727100, P.R. China
| | - Juan Xu
- Department of Stomatology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Hua-Wei Liu
- Department of Stomatology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Wei Dong
- College of Stomatology, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Jin-Yuan Li
- College of Stomatology, Hebei United University, Tangshan, Hebei 063000, P.R. China
| | - Min Hu
- Department of Stomatology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| |
Collapse
|
15
|
Ross RD, Hamilton JL, Wilson BM, Sumner DR, Virdi AS. Pharmacologic augmentation of implant fixation in osteopenic bone. Curr Osteoporos Rep 2014; 12:55-64. [PMID: 24293098 DOI: 10.1007/s11914-013-0182-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Osteoporosis presents a challenge for successful implant fixation due to an impaired healing response. Preclinical studies have consistently reported reduced osseointegration capability in trabecular bone. Although clinical studies of implant success in dentistry have not found a negative effect due to osteoporosis, low bone mass is a significant risk factor for implant migration in orthopedics. Pharmacologic treatment options that limit bone resorption or upregulate formation have been studied preclinically. While, both treatment options improve implant fixation, direct comparisons to-date have found anti-catabolic more effective than anabolic treatments for establishing implant fixation, but combination approaches are better than either treatment alone. Clinically, anti-catabolic treatments, particularly bisphosphonates have been shown to increase the longevity of implants, while limited clinical evidence on the effects of anabolic treatment exists. Preclinical experiments are needed to determine the effects of osteoporosis and subsequent treatment on the long-term maintenance of fixation and recovery after bone loss.
Collapse
Affiliation(s)
- R D Ross
- Anatomy and Cell Biology, Rush University Medical Center, 600 S. Paulina Street, Suite # AcFc 507, Chicago, IL, 60612, USA
| | | | | | | | | |
Collapse
|
16
|
Li JP, Li P, Hu J, Dong W, Liao NN, Qi MC, Li JY. Early healing of hydroxyapatite-coated implants in grafted bone of zoledronic acid-treated osteoporotic rabbits. J Periodontol 2013; 85:308-16. [PMID: 23688100 DOI: 10.1902/jop.2013.130046] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Resorption of grafted bone and delayed osseointegration of implants are main problems associated with alveolar bone augmentation in dental implantology, especially for patients with osteoporosis. The aim of this study is to investigate the early healing response of implants to systemic treatment of zoledronic acid (ZA) in autogenous grafted iliac bone of osteoporotic rabbits. METHODS Ovariectomy (OVX) or sham operation was performed in 46 rabbits, and osteoporotic changes were verified in animals receiving OVX 3 months later. The remaining animals were divided into three groups (n = 12): sham, OVX, and OVX with ZA treatment (ZA group). Autogenous iliac bone grafting was performed in bilateral tibiae, and hydroxyapatite-coated titanium implants were simultaneously placed into the grafted bone. The animals were sacrificed 2 and 8 weeks later for examination. RESULTS At both time points, systemic treatment of ZA efficiently promoted bone healing of implants in grafted bone, and all histologic and microcomputed tomography bone indices, including mineralized bone volume, implant-bone contact ratio, connectivity density, trabecular thickness, and trabecular number, were significantly increased in the ZA group compared with the OVX-only group (P <0.01); implant-bone contact rates in the ZA group were even restored to levels similar to those of sham-operated animals (P >0.05). Furthermore, biomechanical testing demonstrated that removal torque of implants was significantly increased in the ZA group compared with the OVX group (P <0.01). CONCLUSION Systemic treatment with ZA could efficiently promote early bone healing of implants in autogenous grafted bone of osteoporotic rabbits by increasing early osseointegration and fixation of implants.
Collapse
Affiliation(s)
- Jian-Ping Li
- College of Stomatology, Hebei United University, Tangshan City, Hebei Province, China
| | | | | | | | | | | | | |
Collapse
|
17
|
Daugaard H, Elmengaard B, Andreassen TT, Lamberg A, Bechtold JE, Soballe K. Systemic intermittent parathyroid hormone treatment improves osseointegration of press-fit inserted implants in cancellous bone. Acta Orthop 2012; 83:411-9. [PMID: 22880714 PMCID: PMC3427634 DOI: 10.3109/17453674.2012.702388] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND AND PURPOSE Intermittent administration of parathyroid hormone (PTH) has an anabolic effect on bone, as confirmed in human osteoporosis studies, distraction osteogenesis, and fracture healing. PTH in rat models leads to improved fixation of implants in low-density bone or screw insertion transcortically. MATERIAL AND METHODS We examined the effect of human PTH (1-34) on the cancellous osseointegration of unloaded implants inserted press-fit in intact bone of higher animal species. 20 dogs were randomized to treatment with human PTH (1-34), 5 μg/kg/day subcutaneously, or placebo for 4 weeks starting on the day after insertion of a cylindrical porous coated plasma-sprayed titanium alloy implant in the proximal metaphyseal cancellous bone of tibia. Osseointegration was evaluated by histomorphometry and fixation by push-out test to failure. RESULTS Surface fraction of woven bone at the implant interface was statistically significantly higher in the PTH group by 1.4 fold with (median (interquartile range) 15% (13-18)) in the PTH group and 11% (7-13) in control. The fraction of lamellar bone was unaltered. No significant difference in bone or fibrous tissue was observed in the circumferential regions of 0-500, 500-1,000, and 1,000-2,000 μm around the implant. Mechanically, the implants treated with PTH showed no significant differences in total energy absorption, maximum shear stiffness, or maximum shear strength. INTERPRETATION Intermittent treatment with PTH (1-34) improved histological osseointegration of a prosthesis inserted press-fit at surgery in cancellous bone, with no additional improvement of the initial mechanical fixation at this time point.
Collapse
Affiliation(s)
- Henrik Daugaard
- Orthopaedic Research Laboratory, Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Brian Elmengaard
- Orthopaedic Research Laboratory, Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | | | - Anders Lamberg
- Orthopaedic Research Laboratory, Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Joan Elisabeth Bechtold
- Orthopaedic Biomechanics Laboratory, Excelen Center for Bone and Joint Research and Minneapolis Medical Research Foundation, Minneapolis, MN, USA
| | - Kjeld Soballe
- Orthopaedic Research Laboratory, Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| |
Collapse
|
18
|
Lima LL, César Neto JB, Cayana EG, Nociti FH, Sallum EA, Casati MZ. Parathyroid hormone (1-34) compensates the negative effect of smoking around implants. Clin Oral Implants Res 2012; 24:1055-9. [PMID: 22712894 DOI: 10.1111/j.1600-0501.2012.02502.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/29/2012] [Indexed: 11/30/2022]
Abstract
OBJECTIVES This study aimed to investigate the effect of Recombinant Human Parathyroid Hormone (PTH 1-34) on attenuating the influence of cigarette smoke on bone around titanium implants. MATERIAL AND METHODS Forty-eight female Wistar rats were used. At the beginning of the study, 15 animals were randomly assigned to Group 1 (control) and received subcutaneous injections of saline solution, three-times/week, after implant placement. The other animals received intermittent cigarette smoke inhalation (CSI), 60 days prior and 60 days after implant placement ( Al 2 O 3 -blasted titanium implants - 4.0 × 2.2 mm). After surgery, these animals were randomly assigned to: Group 2 - subcutaneous injections of saline solution, three-times/week (n = 16) and Group 3 - intermittent doses of PTH (1-34) (40 μg/Kg), three-times/week (n = 17). Animals were sacrificed 60 days after surgery, and degree of bone-to-implant contact (BIC), bone area (BA) within the limits of the threads and proportion of mineralized tissue (PMT) adjacent to the implants (500 μm wide zone) were separately obtained in cortical and cancellous bone. RESULTS Data analysis confirmed that CSI negatively affects bone around implants, as observed for BIC in cortical zone (Cohen's d (d) = -1.26) and for PMT in both zones (d = -6.09 and d = -4.46 for cortical and cancellous zones, respectively). In addition, in the presence of CSI, PTH (1-34) promoted the highest BIC in both regions and BA and PMT in cancellous bone (P < 0.05). The histometric parameter that was not influenced by both PTH and CSI (1-34) was BA in cortical bone (P > 0.05). CONCLUSION In the presence of cigarette smoke, a factor related to poor bone healing and low bone density, PTH (1-34) increased bone volume around implants.
Collapse
Affiliation(s)
- Liana Linhares Lima
- Dept. of Prosthodontics and Periodontics, Division of Periodontics, School of Dentistry at Piracicaba, University of Campinas, Piracicaba, Brazil
| | | | | | | | | | | |
Collapse
|
19
|
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.
Collapse
Affiliation(s)
- Hamdan S Alghamdi
- Department of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | | | | | | |
Collapse
|
20
|
Almagro MI, Roman-Blas JA, Bellido M, Castañeda S, Cortez R, Herrero-Beaumont G. PTH [1-34] enhances bone response around titanium implants in a rabbit model of osteoporosis. Clin Oral Implants Res 2012; 24:1027-34. [PMID: 22626278 DOI: 10.1111/j.1600-0501.2012.02495.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/08/2012] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Dental implant osseointegration can be impaired in medical conditions with low bone mass, such as glucocorticoid-induced osteoporosis. Intermittent human parathyroid hormone (PTH) [1-34] administration has shown relevant anabolic bone activity in various animal models of osteoporosis. Therefore, we studied the effects of intermittent PTH [1-34] on bone response around titanium implants in experimental osteoporosis induced by ovariectomy and glucocorticoid administration. METHODS Titanium dental implants were placed in the proximal tibia metaphysis in 38 animals. Twenty-eight rabbits had undergone bilateral ovariectomy and further methylprednisolone administration for 4 weeks to induce osteoporosis. Ten healthy rabbits were used as controls. At week 8, osteoporotic rabbits started saline vehicle or intermittent PTH administration for 12 weeks. Bone mineral density (BMD) was assessed in peri-implant area, lumbar spine, and global and subchondral knee bone at baseline, and weeks 6 and 20. Animal sacrifice was carried out at week 21. Afterward, tibiae were removed for μCT morphometry and undecalcified sections were evaluated by light and scanning electron microscopy. RESULTS PTH increased bone-to-implant contact compared with control rabbits or vehicle administration in osteoporotic rabbits (P < 0.005). PTH-induced new bone formation around external and internal surfaces of titanium implants led to a significant increase of BMD at peri-implant area in osteoporotic rabbits at week 20, when compared with vehicle (P < 0.005). Likewise, PTH increased BMD in other analysed regions. CONCLUSIONS Intermittent administration of PTH [1-34] enhances the bone response around titanium implants in a rabbit model of ovariectomy and glucocorticoid-induced osteoporosis.
Collapse
Affiliation(s)
- M Isabel Almagro
- Department of Dentistry, IIS Fundación Jiménez Díaz, Universidad Autónoma, Madrid, Spain
| | | | | | | | | | | |
Collapse
|
21
|
Qi M, Hu J, Li J, Li J, Dong W, Feng X, Yu J. Effect of zoledronate acid treatment on osseointegration and fixation of implants in autologous iliac bone grafts in ovariectomized rabbits. Bone 2012; 50:119-27. [PMID: 22023930 DOI: 10.1016/j.bone.2011.10.011] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 09/28/2011] [Accepted: 10/07/2011] [Indexed: 11/15/2022]
Abstract
One main problem associated with alveolar bone augmentation in implant dentistry is resorption of grafted bone, which may be further compromised by systemic skeletal disorders such as osteoporosis. Zoledronate acid (ZOL) is the most potent bisphosphonate to treat osteoporosis and therefore it is hypothesized to be able to invert the negative effect of osteoporosis on osseointegration and fixation of dental implants in autologous bone grafts. In this study, 56 rabbits received bilateral ovariectomy (OVX) (40 rabbits) or sham operation (16 rabbits). Three months later, 8 animals from each group were sacrificed for bone mineral density (BMD) examination. Then the remaining animals underwent bilateral autologous iliac bone grafting with simultaneous implantation of titanium implants in tibiae and were divided into 5 groups (n=8): Sham, OVX, Loc-ZOL (local treatment), Sys-ZOL (systemic treatment) and Loc+Sys-ZOL (local plus systemic) group. At 3 months after implantation, all animals were sacrificed and specimens were harvested for examinations. Both BMD and histological examinations of femurs showed osteoporotic changes after ovariectomy, while systemic treatment with ZOL restored mineralized bone. Micro-CT examination demonstrated that OVX group showed significant decrease of mineralized bone and implant-bone contact when compared with sham control, whereas both systemic and local treatments of ZOL significantly increased mineralized bone and implant-bone contact in ovariectomized animals. However, the best effects were observed in Loc+Sys-ZOL group (combined use of ZOL) and most of bone indices were similar to (IBCR, p>0.05) or higher than (BV/TV, Conn.D and Tb.N) (p<0.01) those of the sham group, except Tb.Th, which was still significantly lower (p<0.01), and Tb.Sp, which was further decreased (p<0.01). The aforementioned effects were also confirmed by histomorphometric analysis of bone indices on implant-bone contact and mineralized bone. In addition, biomechanical testing further supported the beneficial effect of ZOL treatment and maximal removal torque of titanium implants was observed in Loc+Sys-ZOL group. In conclusion, our study suggests that both systemic and local treatments with ZOL can invert negative effect of osteoporosis and promote osseointegration and fixation of dental implants in autologous bone grafts under osteoporotic condition. Combined systemic and local use of ZOL exerts best effects when compared to their single use.
Collapse
Affiliation(s)
- Mengchun Qi
- College of Stomatology, Hebei United University, Tangshan City 063000, China.
| | | | | | | | | | | | | |
Collapse
|
22
|
Abstract
In the current era, various pharmacological agents exist for osteoporosis management, and synthetic parathyroid hormone (PTH) (Teriparatide, Forteo) is one of the treatment options. Depending on the timing of administration, PTH has a unique ability to cause both bone apposition and bone resorption. This review focuses on the effects of PTH on the bone, specifically the jaw bones mandible and maxilla. The article briefly describes the fundamental mechanism of PTH action at the molecular level, as well as in experimental animals and in humans. It differentiates intermittent administration of PTH, especially at doses tolerated by humans that increase bone strength and prevent bone fractures, from continuous use that may lead to bone loss. In particular, it shows how intermittent administration of PTH can play a significant role in periodontal repair and implant success via stimulation of bone mineral content especially in the pre-alveolar region.
Collapse
Affiliation(s)
- P Aggarwal
- Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | | |
Collapse
|
23
|
Beppu K, Kido H, Watazu A, Teraoka K, Matsuura M. Peri-Implant Bone Density in Senile Osteoporosis-Changes from Implant Placement to Osseointegration. Clin Implant Dent Relat Res 2011; 15:217-26. [DOI: 10.1111/j.1708-8208.2011.00350.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
24
|
Daugaard H, Elmengaard B, Andreassen T, Bechtold J, Lamberg A, Soballe K. Parathyroid hormone treatment increases fixation of orthopedic implants with gap healing: a biomechanical and histomorphometric canine study of porous coated titanium alloy implants in cancellous bone. Calcif Tissue Int 2011; 88:294-303. [PMID: 21253714 PMCID: PMC3059756 DOI: 10.1007/s00223-010-9458-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2010] [Accepted: 11/18/2010] [Indexed: 11/17/2022]
Abstract
Parathyroid hormone (PTH) administered intermittently is a bone-building peptide. In joint replacements, implants are unavoidably surrounded by gaps despite meticulous surgical technique and osseointegration is challenging. We examined the effect of human PTH(1-34) on implant fixation in an experimental gap model. We inserted cylindrical (10 × 6 mm) porous coated titanium alloy implants in a concentric 1-mm gap in normal cancellous bone of proximal tibia in 20 canines. Animals were randomized to treatment with PTH(1-34) 5 μg/kg daily. After 4 weeks, fixation was evaluated by histomorphometry and push-out test. Bone volume was increased significantly in the gap. In the outer gap (500 μm), the bone volume fraction median (interquartile range) was 27% (20-37%) for PTH and 10% (6-14%) for control. In the inner gap, the bone volume fraction was 33% (26-36%) for PTH and 13% (11-18%) for control. At the implant interface, the bone fraction improved with 16% (11-20%) for PTH and 10% (7-12%) (P = 0.07) for control. Mechanical implant fixation was improved for implants exposed to PTH. For PTH, median (interquartile range) shear stiffness was significantly higher (PTH 17.4 [12.7-39.7] MPa/mm and control 8.8 [3.3-12.4] MPa/mm) (P < 0.05). Energy absorption was significantly enhanced for PTH (PTH 781 [595-1,198.5] J/m(2) and control 470 [189-596] J/m(2)). Increased shear strength was observed but was not significant (PTH 3.0 [2.6-4.9] and control 2.0 [0.9-3.0] MPa) (P = 0.08). Results show that PTH has a positive effect on implant fixation in regions where gaps exist in the surrounding bone. With further studies, PTH may potentially be used clinically to enhance tissue integration in these challenging environments.
Collapse
Affiliation(s)
- Henrik Daugaard
- Orthopaedic Department, Aarhus University Hospital, Aarhus, Denmark.
| | | | | | | | | | | |
Collapse
|
25
|
Daugaard H, Elmengaard B, Andreassen TT, Baas J, Bechtold JE, Soballe K. The combined effect of parathyroid hormone and bone graft on implant fixation. ACTA ACUST UNITED AC 2011; 93:131-9. [PMID: 21196558 DOI: 10.1302/0301-620x.93b1.24261] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Impaction allograft is an established method of securing initial stability of an implant in arthroplasty. Subsequent bone integration can be prolonged, and the volume of allograft may not be maintained. Intermittent administration of parathyroid hormone has an anabolic effect on bone and may therefore improve integration of an implant. Using a canine implant model we tested the hypothesis that administration of parathyroid hormone may improve osseointegration of implants surrounded by bone graft. In 20 dogs a cylindrical porous-coated titanium alloy implant was inserted into normal cancellous bone in the proximal humerus and surrounded by a circumferential gap of 2.5 mm. Morsellised allograft was impacted around the implant. Half of the animals were given daily injections of human parathyroid hormone (1-34) 5 μg/kg for four weeks and half received control injections. The two groups were compared by mechanical testing and histomorphometry. We observed a significant increase in new bone formation within the bone graft in the parathyroid hormone group. There were no significant differences in the volume of allograft, bone-implant contact or in the mechanical parameters. These findings suggest that parathyroid hormone improves new bone formation in impacted morsellised allograft around an implant and retains the graft volume without significant resorption. Fixation of the implant was neither improved nor compromised at the final follow-up of four weeks.
Collapse
Affiliation(s)
- H Daugaard
- Department of Orthopaedic Surgery, Orthopaedic Research Laboratory, Aarhus University Hospital, Norrebrogade 44, Building 1A, DK-8000 Aarhus C, Denmark.
| | | | | | | | | | | |
Collapse
|
26
|
Kamo K, Miyakoshi N, Kasukawa Y, Nozaka K, Sasaki H, Shimada Y. Intermittent weekly administration of human parathyroid hormone (1-34) improves bone-hydroxyapatite block bonding in ovariectomized rats. J Bone Miner Metab 2010; 28:634-40. [PMID: 20376511 DOI: 10.1007/s00774-010-0178-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2009] [Accepted: 03/07/2010] [Indexed: 01/30/2023]
Abstract
Hydroxyapatite (HA) blocks have been widely used for the reconstruction of bone defects and as a bone substitute. Bone-implant bonding depends on both implant-related factors and patient variables. Intermittent human parathyroid hormone (h-PTH) has a strong anabolic effect on bone formation. The purpose of the present study is to evaluate whether intermittent h-PTH administration enhances bone-HA block bonding in normal versus ovariectomized (OVX) rats. Cancellous bone osteotomy and HA-block implantation were performed on the proximal left tibia in both OVX and sham-operated 7-month-old female Sprague-Dawley rats. Newly formed cancellous bone around the HA block and bone-HA block bonding were evaluated by bone histomorphometry at 8 weeks after the administration of h-PTH (100 μg/kg/week) or its vehicle. The administration of h-PTH significantly increased cancellous bone volume by stimulating bone formation in OVX rats (p < 0.01). Although bone-HA block bonding was significantly decreased in OVX rats compared to that of sham-operated rats (p < 0.01), h-PTH improved the bone-HA block bonding in OVX rats (p < 0.01). These results suggest that intermittent h-PTH treatment may improve bone-HA bonding in osteoporosis by restoring cancellous bone volume and enhancing cancellous bone formation around the HA block.
Collapse
Affiliation(s)
- Keiji Kamo
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita, Japan.
| | | | | | | | | | | |
Collapse
|