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Practical whole-tooth restoration utilizing autologous bioengineered tooth germ transplantation in a postnatal canine model. Sci Rep 2017; 7:44522. [PMID: 28300208 PMCID: PMC5353657 DOI: 10.1038/srep44522] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 02/10/2017] [Indexed: 01/27/2023] Open
Abstract
Whole-organ regeneration has great potential for the replacement of dysfunctional organs through the reconstruction of a fully functional bioengineered organ using three-dimensional cell manipulation in vitro. Recently, many basic studies of whole-tooth replacement using three-dimensional cell manipulation have been conducted in a mouse model. Further evidence of the practical application to human medicine is required to demonstrate tooth restoration by reconstructing bioengineered tooth germ using a postnatal large-animal model. Herein, we demonstrate functional tooth restoration through the autologous transplantation of bioengineered tooth germ in a postnatal canine model. The bioengineered tooth, which was reconstructed using permanent tooth germ cells, erupted into the jawbone after autologous transplantation and achieved physiological function equivalent to that of a natural tooth. This study represents a substantial advancement in whole-organ replacement therapy through the transplantation of bioengineered organ germ as a practical model for future clinical regenerative medicine.
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Yamamoto N, Oshima M, Tanaka C, Ogawa M, Nakajima K, Ishida K, Moriyama K, Tsuji T. Functional tooth restoration utilising split germs through re-regionalisation of the tooth-forming field. Sci Rep 2015; 5:18393. [PMID: 26673152 PMCID: PMC4682098 DOI: 10.1038/srep18393] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 11/17/2015] [Indexed: 12/11/2022] Open
Abstract
The tooth is an ectodermal organ that arises from a tooth germ under the regulation of reciprocal epithelial-mesenchymal interactions. Tooth morphogenesis occurs in the tooth-forming field as a result of reaction-diffusion waves of specific gene expression patterns. Here, we developed a novel mechanical ligation method for splitting tooth germs to artificially regulate the molecules that control tooth morphology. The split tooth germs successfully developed into multiple correct teeth through the re-regionalisation of the tooth-forming field, which is regulated by reaction-diffusion waves in response to mechanical force. Furthermore, split teeth erupted into the oral cavity and restored physiological tooth function, including mastication, periodontal ligament function and responsiveness to noxious stimuli. Thus, this study presents a novel tooth regenerative technology based on split tooth germs and the re-regionalisation of the tooth-forming field by artificial mechanical force.
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Affiliation(s)
- Naomi Yamamoto
- Department of Maxillofacial Orthognathics, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, 113-8510, JAPAN.,Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, 278-8510, JAPAN
| | - Masamitsu Oshima
- Department of Oral Rehabilitation and Regenerative Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, 700-8525, JAPAN.,Research Institute for Science and Technology, Tokyo University of Science, Noda, Chiba, 278-8510, JAPAN
| | - Chie Tanaka
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, 278-8510, JAPAN
| | - Miho Ogawa
- Research Institute for Science and Technology, Tokyo University of Science, Noda, Chiba, 278-8510, JAPAN.,Organ Technologies Inc., Tokyo, 108-0074, JAPAN.,RIKEN Center for Developmental Biology, Kobe, Hyogo, 650-0047, JAPAN
| | - Kei Nakajima
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, 278-8510, JAPAN.,Department of Clinical Pathophysiology, Tokyo Dental College, Chiyoda-ku, Tokyo, 101-0061, JAPAN
| | - Kentaro Ishida
- Research Institute for Science and Technology, Tokyo University of Science, Noda, Chiba, 278-8510, JAPAN.,Department of Physics and Mathematics, College of Science and Engineering, Aoyama Gakuin University, Sagamihara, Kanagawa, 252-5258, JAPAN
| | - Keiji Moriyama
- Department of Maxillofacial Orthognathics, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, 113-8510, JAPAN
| | - Takashi Tsuji
- Department of Biological Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba, 278-8510, JAPAN.,Research Institute for Science and Technology, Tokyo University of Science, Noda, Chiba, 278-8510, JAPAN.,Organ Technologies Inc., Tokyo, 108-0074, JAPAN.,RIKEN Center for Developmental Biology, Kobe, Hyogo, 650-0047, JAPAN
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Furfaro F, Ang ESM, Lareu RR, Murray K, Goonewardene M. A histological and micro-CT investigation in to the effect of NGF and EGF on the periodontal, alveolar bone, root and pulpal healing of replanted molars in a rat model - a pilot study. Prog Orthod 2014; 15:2. [PMID: 24393534 PMCID: PMC3896721 DOI: 10.1186/2196-1042-15-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 11/22/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND This study aims to investigate, utilising micro-computed tomography (micro-CT) and histology, whether the topical application of nerve growth factor (NGF) and/or epidermal growth factor (EGF) can enhance periodontal, alveolar bone, root and pulpal tissue regeneration while minimising the risk of pulpal necrosis, root resorption and ankylosis of replanted molars in a rat model. METHODS Twelve four-week-old male Sprague-Dawley rats were divided into four groups: sham, collagen, EGF and NGF. The maxillary right first molar was elevated and replanted with or without a collagen membrane impregnated with either the growth factors EGF or NGF, or a saline solution. Four weeks after replantation, the animals were sacrificed and the posterior maxilla was assessed using histological and micro-CT analysis. The maxillary left first molar served as the control for the corresponding right first molar. RESULTS Micro-CT analysis revealed a tendency for all replanted molars to have reduced root length, root volume, alveolar bone height and inter-radicular alveolar bone volume. It appears that the use of the collagen membrane had a negative effect while no positive effect was noted with the incorporation of EGF or NGF. Histologically, the incorporation of the collagen membrane was found to negatively affect pulpal, root, periodontal and alveolar bone healing with pulpal inflammation and hard tissue formation, extensive root resorption and alveolar bone fragmentation. The incorporation of EGF and NGF did not improve root, periodontal or alveolar bone healing. However, EGF was found to improve pulp vascularisation while NGF-improved pulpal architecture and cell organisation, although not to the level of the control group. CONCLUSIONS Results indicate a possible benefit on pulpal vascularisation and pulpal cell organisation following the incorporation of EGF and NGF, respectively, into the alveolar socket of replanted molars in the rat model. No potential benefit of EGF and NGF was detected in periodontal or root healing, while the use of a collagen membrane carrier was found to have a negative effect on the healing response.
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Affiliation(s)
- Francesco Furfaro
- Department of Orthodontics, The University of Western Australia, Crawley, Western Australia 6009, Australia.
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Lima JPM, Neto JJSM, Beltrão HCP, Borges FMC, Nogueira RLM, De Araújo Lima ADM. Esthetic considerations for reshaping of autotransplanted premolars replacing maxillary central incisors: a case report. Dent Traumatol 2009; 25:631-635. [DOI: 10.1111/j.1600-9657.2009.00825.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Tanaka T, Deguchi T, Kageyama T, Kanomi R, Inoue M, Foong KWC. Autotransplantation of 28 Premolar Donor Teeth in 24 Orthodontic Patients. Angle Orthod 2008; 78:12-9. [DOI: 10.2319/120706-495.1] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2006] [Accepted: 02/01/2007] [Indexed: 11/23/2022] Open
Abstract
Abstract
Objective: To test the null hypothesis that premolar autotransplantation is not successful for orthodontic patients.
Materials and Methods: In the present study, 28 premolar transplants from 24 orthodontic patients were associated with orthodontic treatment. At a routine 3-month appointment, patients underwent a dental radiograph and a chair-side observation for periodontal problems. Three sets of dental radiographs were taken by one dental assistant using a custom holder at: preoperation (T0), 2 year postoperation (T1), and retention (T2) (4- to 14-year follow-up observation) stages. All transplants were conducted in a one-phase operation by one operator (Dr Inoue). Recipient sites were: ten for missing maxillary canines, nine for maxillary centrals and laterals, eight for lower second premolar, and five for other missing premolar sites. All recipients maintained the retained primary tooth with a socket.
Results: The success ratio of all 28 transplants was 100%, although four transplants shorter than a 4-year period of observation were omitted. Two transplant patients, one with a medical history of histiocytosis and the other with a history of osteomyelitis of the maxilla without a recipient socket, were also excluded from this study. Eleven of 22 premolar transplants had a root canal treatment (RCT), four of which had RCT within 2 years after the operation.
Conclusions: The null hypothesis was rejected. The success ratio of premolar transplants was 100%.
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Affiliation(s)
- Tadasu Tanaka
- a Graduate PhD student, Graduate School (Unit of Orthodontics) and Institute for Oral Science, Matsumoto Dental University School of Dentistry, Nagano, Japan
| | - Toshio Deguchi
- b Professor and Head, Graduate School (Unit of Orthodontics) and Institute for Oral Science, Matsumoto Dental University School of Dentistry, Nagano, Japan. Professor, Orthodontic Postgraduate Program, Department of Preventive Dentistry, National University of Singapore and Hospital, Faculty of Dentistry, Singapore
| | - Toru Kageyama
- c Associate Professor, Graduate School (Unit of Orthodontics) and Institute for Oral Science, Matsumoto Dental University School of Dentistry, Nagano, Japan
| | | | - Masahiro Inoue
- e Associate Professor, Department of Oral Implantology, Osaka Dental University, Osaka, Japan
| | - Kelvin W. C. Foong
- f Associate Professor, Orthodontic Postgraduate Program, Department of Preventive Dentistry, National University of Singapore and Hospital, Faculty of Dentistry, Singapore
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