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Burns A, Hughes A, O'Sullivan M. Orthodontic bonding in special circumstances. Br Dent J 2024; 237:400-406. [PMID: 39271876 PMCID: PMC11399083 DOI: 10.1038/s41415-024-7791-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 08/04/2024] [Accepted: 08/06/2024] [Indexed: 09/15/2024]
Abstract
This clinical paper provides an in-depth exploration of advanced techniques for bonding orthodontic attachments under special circumstances. Challenges arise when bonding brackets to non-enamel surfaces, such as dental restorations, and in conditions such as amelogenesis imperfecta, which affect enamel integrity. Distinct approaches required for bonding to different restorative materials, including glassy ceramics, zirconia, resin composites and metals, are outlined. Moreover, we describe strategies to manage bonding in conditions including amelogenesis imperfecta, hypodontia and microdontia in a multidisciplinary context.
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Affiliation(s)
- Angus Burns
- Consultant/Senior Lecturer in Orthodontics, Dublin Dental University Hospital, Trinity College Dublin, Ireland.
| | - Annie Hughes
- Postgraduate in Restorative Dentistry, Dublin Dental University Hospital, Trinity College Dublin, Ireland
| | - Michael O'Sullivan
- Consultant/Professor in Restorative Dentistry, Dublin Dental University Hospital, Trinity College Dublin, Ireland
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Blokland L, Arponen H, Ahmad A, Colijn S, Gjørup H, John R, Li M, Mekking D, Parekh S, Retrouvey JM, Stutz Steiger T, Zhou L, Andersson K. A standard set of outcome measures for the comprehensive assessment of oral health and occlusion in individuals with osteogenesis imperfecta. Orphanet J Rare Dis 2024; 19:294. [PMID: 39138478 PMCID: PMC11320983 DOI: 10.1186/s13023-024-03308-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 08/06/2024] [Indexed: 08/15/2024] Open
Abstract
BACKGROUND Osteogenesis imperfecta (OI) is a group of inherited connective tissue disorders of varying severity characterized by bone fragility. The primary objective of this international multidisciplinary collaboration initiative was to reach a consensus for a standardized set of clinician and patient-reported outcome measures, as well as associated measuring instruments for dental care of individuals with OI, based on the aspects considered important by both experts and patients. This project is a subsequent to the Key4OI project initiated by the Care4BrittleBones foundation which aims to develop a standard set of outcome measures covering a large domain of factors affecting quality of life for people with OI. An international team of experts comprising orthodontists, pediatric dentists, oral and maxillofacial surgeons, and prosthetic dentists used a modified Delphi consensus process to select clinician-reported outcome measures (CROMs) and patient-reported outcome measures (PROMs) to evaluate oral health in individuals with OI. Important domains were identified through a literature review and by professional expertise (both CROMs and PROMs). In three focus groups of individuals with OI, important and relevant issues regarding dental health were identified. The input from the focus groups was used as the basis for the final set of outcome measures: the selected issues were attributed to relevant CROMs and, when appropriate, matched with validated questionnaires to establish the final PROMs which represented best the specific oral health-related concerns of individuals with OI. RESULTS Consensus was reached on selected CROMs and PROMs for a standard set of outcome measures and measuring instruments of oral health in individuals with OI. CONCLUSIONS Our project resulted in consensus statements for standardization oral health PROMs and CROMs in individuals with OI. This outcome set can improve the standard of care by incorporating recommendations of professionals involved in dental care of individuals with OI. Further, it can facilitate research and international research co-operation. In addition, the significant contribution of the focus groups highlights the relevance of dental and oral health-related problems of individuals with OI.
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Affiliation(s)
- L Blokland
- Vogellanden, Center of Rehabilitation Medicine and Special Care in Dentistry, Zwolle, The Netherlands.
| | - H Arponen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
- Helsinki University Hospital Head and Neck Center, Helsinki, Finland
| | - A Ahmad
- Whittington Health NHS Trust Dental Services, London, UK
| | - S Colijn
- Care4BrittleBones Foundation, Wassenaar, The Netherlands
- Elkerliek Hospital, Helmond, The Netherlands
| | - H Gjørup
- Center for Oral Health in Rare Diseases, Department of Dental and Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - R John
- Department of Paediatric Dentistry, University of Bristol, Bristol, UK
| | - M Li
- Department of Stomatology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - D Mekking
- Care4BrittleBones Foundation, Wassenaar, The Netherlands
| | - S Parekh
- Department of Paediatric Dentistry, UCL Eastman Dental Institute, London, UK
| | - J M Retrouvey
- Department of Molecular Genetics, Baylor School of Medicine, Houston, TX, USA
| | | | - L Zhou
- Department of Stomatology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - K Andersson
- Mun-H-Center, National Orofacial Resource Centre for Rare Diseases and Clinic of Pedodontics, Public Dental Service, Region Västra Götaland, Göteborg, Sweden
- Department of Pediatric Dentistry, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
- Department of Dental Medicine, Division of Orthodontics and Pediatric Dentistry, Karolinska Institutet and Center for Pediatric Oral Health Research, Stockholm, Sweden
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Voinot J, Bedez M. Pretreatments to bonding on enamel and dentin disorders: a systematic review. Evid Based Dent 2024:10.1038/s41432-024-01037-z. [PMID: 39044008 DOI: 10.1038/s41432-024-01037-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/07/2024] [Accepted: 07/09/2024] [Indexed: 07/25/2024]
Abstract
INTRODUCTION This systematic review focuses on structural anomalies of enamel and dentin such as fluorosis (F), molar-incisor hypomineralization (MIH), amelogenesis imperfecta (AI), dentinogenesis imperfecta (DI), osteogenesis imperfecta (OI), and X-linked hypophosphatemia (XLH). These pathologies affect up to 31% of the population, posing challenges in the adhesion of direct restorations. The primary objective of this analysis is to examine the survival rate and/or bonding resistance of direct restorations on tissues affected by enamel and dentin disorders in humans. We aim to provide precise clinical recommendations for dentists to choose the appropriate bonding pretreatment for various enamel and dentin disorders. METHODS We systematically searched the medical literature to identify abstracts of interest indexed between 1993 and May 2024, from 4 databases (PubMed, PMC-PubMed, Web of Science and Cochrane Library). The results are reported following the PRISMA statement. The GRADE approach was used to assess the risk of bias. RESULTS The two authors included 27 studies out of the 600 identified. The data extracted from these studies are highly heterogeneous, and the mentioned bonding protocols are all different. 15 articles pertain to F, 7 to MIH, 5 to AI, and none focus on HSPM, dentin disorders and XLH. We identified 12 pretreatments of enamel or dentin (7 for F, 2 for MIH, and 3 for AI), including 3 strong recommendations. Additional studies are necessary to confirm the effectiveness of certain pretreatments. In developmental enamel defects, the main recommendation we collected is to bond on enamel with an etch-and-rinse technique on F and MIH. Considerations with lower strength of evidence include a deproteinization step on enamel on F, MIH and AI and modifications of the etching parameters on F and AI. The research strategy was registered on the Prospero platform (CRD42023447502).
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Affiliation(s)
- Jeanne Voinot
- Univ. Lille, CHU Lille, Odontologie, F-59000 Lille, France
| | - Maxime Bedez
- Univ. Lille, CHU Lille, Odontologie, F-59000 Lille, France.
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Calamari ZT, Song A, Cohen E, Akter M, Roy RD, Hallikas O, Christensen MM, Li P, Marangoni P, Jernvall J, Klein OD. Vole genomics links determinate and indeterminate growth of teeth. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.18.572015. [PMID: 38187646 PMCID: PMC10769287 DOI: 10.1101/2023.12.18.572015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Continuously growing teeth are an important innovation in mammalian evolution, yet genetic regulation of continuous growth by stem cells remains incompletely understood. Dental stem cells responsible for tooth crown growth are lost at the onset of tooth root formation. Genetic signaling that initiates this loss is difficult to study with the ever-growing incisor and rooted molars of mice, the most common mammalian dental model species, because signals for root formation overlap with signals that pattern tooth size and shape (i.e., cusp patterns). Different species of voles (Cricetidae, Rodentia, Glires) have evolved rooted and unrooted molars that have similar size and shape, providing alternative models for studying roots. We assembled a de novo genome of Myodes glareolus, a vole with high-crowned, rooted molars, and performed genomic and transcriptomic analyses in a broad phylogenetic context of Glires (rodents and lagomorphs) to assess differential selection and evolution in tooth forming genes. We identified 15 dental genes with changing synteny relationships and six dental genes undergoing positive selection across Glires, two of which were undergoing positive selection in species with unrooted molars, Dspp and Aqp1. Decreased expression of both genes in prairie voles with unrooted molars compared to bank voles supports the presence of positive selection and may underlie differences in root formation. Bulk transcriptomics analyses of embryonic molar development in bank voles also demonstrated conserved patterns of dental gene expression compared to mice, with species-specific variation likely related to developmental timing and morphological differences between mouse and vole molars. Our results support ongoing evolution of dental genes across Glires, revealing the complex evolutionary background of convergent evolution for ever-growing molars.
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Affiliation(s)
- Zachary T. Calamari
- Baruch College, City University of New York, One Bernard Baruch Way, New York, NY 10010, USA
- The Graduate Center, City University of New York, 365 Fifth Ave, New York, NY 10016, USA
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
- Division of Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York, NY, 10024, USA
| | - Andrew Song
- Baruch College, City University of New York, One Bernard Baruch Way, New York, NY 10010, USA
- Cornell University, 616 Thurston Ave, Ithaca, NY 14853, USA
| | - Emily Cohen
- Baruch College, City University of New York, One Bernard Baruch Way, New York, NY 10010, USA
- New York University College of Dentistry, 345 E 34th St, New York, NY 10010
| | - Muspika Akter
- Baruch College, City University of New York, One Bernard Baruch Way, New York, NY 10010, USA
| | - Rishi Das Roy
- Institute of Biotechnology, University of Helsinki, FI-00014 Helsinki, Finland
| | - Outi Hallikas
- Institute of Biotechnology, University of Helsinki, FI-00014 Helsinki, Finland
| | - Mona M. Christensen
- Institute of Biotechnology, University of Helsinki, FI-00014 Helsinki, Finland
| | - Pengyang Li
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
- Department of Pediatrics, Cedars-Sinai Guerin Children’s, 8700 Beverly Blvd., Suite 2416, Los Angeles, CA 90048, USA
| | - Pauline Marangoni
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
- Department of Pediatrics, Cedars-Sinai Guerin Children’s, 8700 Beverly Blvd., Suite 2416, Los Angeles, CA 90048, USA
| | - Jukka Jernvall
- Institute of Biotechnology, University of Helsinki, FI-00014 Helsinki, Finland
- Department of Geosciences and Geography, University of Helsinki, FI-00014 Helsinki, Finland
| | - Ophir D. Klein
- Program in Craniofacial Biology and Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA 94158, USA
- Department of Pediatrics, Cedars-Sinai Guerin Children’s, 8700 Beverly Blvd., Suite 2416, Los Angeles, CA 90048, USA
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Meng C, Le D, Wang X, Song Y, Song G. Orthodontic treatment of a patient with dentinogenesis imperfecta using a clear aligner system. J Am Dent Assoc 2024:S0002-8177(24)00074-6. [PMID: 38573273 DOI: 10.1016/j.adaj.2024.01.007] [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: 09/26/2023] [Revised: 01/10/2024] [Accepted: 01/10/2024] [Indexed: 04/05/2024]
Abstract
BACKGROUND Orthodontic treatment for patients with dentinogenesis imperfecta (DGI) can be risky because of the fragility of their dental hard tissue. Although the Invisalign (Align Technology) clear aligner system should be a suitable orthodontic appliance for patients with DGI, to the authors' knowledge, there has been no related research. CASE DESCRIPTION A 28-year-old woman with DGI sought treatment with a 1 mm open bite, edge-to-edge occlusion of the central incisors, and a bilateral Class III cusp-to-cusp molar relationship. Invisalign was applied for her treatment, and after 3 and one-half years of orthodontic therapy, a normal overjet and overbite were achieved, accompanied by retraction of the lower lip as well as a bilateral Class I molar relationship. In addition, there was no iatrogenic injury to the patient's teeth. PRACTICAL IMPLICATIONS The Invisalign system may be a suitable orthodontic appliance for patients with DGI because clear aligners lessen the tensile stress to the teeth, decrease the number and area of bonds to the teeth, and offer protective effects through a full wrap of plastic that covers the crowns of the teeth.
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Monteiro J, Balmer R, Lafferty F, Lyne A, Mighell A, O'Donnell K, Parekh S. Establishment of a clinical network for children with amelogenesis imperfecta and dentinogenesis imperfecta in the UK: 4-year experience. Eur Arch Paediatr Dent 2024; 25:85-91. [PMID: 38308725 PMCID: PMC10943134 DOI: 10.1007/s40368-023-00859-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 12/13/2023] [Indexed: 02/05/2024]
Abstract
BACKGROUND Amelogenesis imperfecta (AI) and dentinogenesis imperfecta (DI) are two groups of genetically inherited conditions resulting in abnormal enamel and dentin formation, respectively. Children and young people may be adversely affected by these conditions, with significant reduction in oral health related quality of life. Dental management of children with AI and DI is often complex, which is exacerbated by the absence of clear referral pathways and scarce evidence-based guidelines. METHOD The need for increased knowledge and peer support led to the development of a group of UK paediatric dentists with a special clinical interest in the management of children with AI and DI. PURPOSE The aims of this paper are to describe the establishment of an AI/DI Clinical Excellence Network (AI/DI CEN) in paediatric dentistry including outputs and future plans, and to share our collective learning to help support others anywhere in the world advance the care of people with AI or DI.
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Affiliation(s)
- J Monteiro
- Sheffield Teaching Hospitals, University of Sheffield, Sheffield, UK.
| | - R Balmer
- School of Dentistry, The University of Leeds, Leeds, UK
| | | | - A Lyne
- RNENTEDH, University College London Hospitals, London, UK
| | - A Mighell
- School of Dentistry, The University of Leeds, Leeds, UK
| | | | - S Parekh
- UCL Eastman Dental Institute, London, UK
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Zhang Y, Jin X, Zhang Z, Hu S, Jiang W, Pan H, Zhang L, Fu B. A novel approach to full-mouth rehabilitation of dentinogenesis imperfecta type II: Case series with review of literature. Medicine (Baltimore) 2024; 103:e36882. [PMID: 38277536 PMCID: PMC10817141 DOI: 10.1097/md.0000000000036882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 10/12/2023] [Indexed: 01/28/2024] Open
Abstract
RATIONALE Dentinogenesis imperfecta (DI) is an autosomal-dominant disorder. The most common clinical manifestations, including obliterated tooth tissues and severe tooth wear, usually lead to tooth extractions. It remains a great challenge for dentists to preserve the residual tooth tissue and establish the esthetics and occlusion of dentitions. PATIENTS CONCERNS 25-year-old twin sisters, who had suffered from dentinogenesis imperfecta type II for more than 10 years, presented with continuous tooth wear and discomfort from wearing a removable partial denture for more than 3 years. DIAGNOSIS Intraoral examination showed extensive tooth wear with enamel exfoliation and typical amber-brown color with an opalescent discoloration. Their panoramic radiographs revealed completely obliterated tooth tissues and severe tooth wear. INTERVENTIONS AND OUTCOMES The dentitions were restored with post-and-core crowns and pin lays after preparing root post paths and pin holes guided by computer-aided design/computer-aided manufacturing (CAD/CAM) procedures, resulting in a successful repair. LESSONS Severe tooth wear and tooth tissue obliteration are typical clinical manifestations in DI-affected dentitions, increasing the complexity and difficulty in dental restorations. Early diagnosis and appropriate treatments are essential to achieve a favorable prognosis. CAD/CAM procedures, permitting accurate and effective treatment, possess promising potential in the treatment of DI-affected dentitions.
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Affiliation(s)
- Yizhou Zhang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | - Xiaoting Jin
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | - Zhengyi Zhang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | - Sai Hu
- The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China
| | - Wenxiang Jiang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | | | - Ling Zhang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
| | - Baiping Fu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China
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Liao Y, Pan T, Xing X. Regenerative Endodontic Treatment in Dentinogenesis Imperfecta-Induced Apical Periodontitis. Case Rep Dent 2024; 2024:5128588. [PMID: 38223911 PMCID: PMC10787646 DOI: 10.1155/2024/5128588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/28/2023] [Accepted: 12/21/2023] [Indexed: 01/16/2024] Open
Abstract
Pulp involvement of immature permanent teeth with dentinogenesis imperfecta is challenging and could lead to extraction. A case of dentinogenesis imperfecta-induced periapical periodontitis of an immature permanent tooth was treated with regenerative endodontic treatment (RET), and root maturation was observed in 12-month follow-up. An 8-year-old girl presented acute pain and swelling in central mandibular region. Clinical and radiographic examination revealed "shell teeth" appearance of teeth 31, 41, and 42. Periapical lesion of tooth 31 was observed. Tooth 41 was previously treated with apexification. RET was planned and carried out for the necrotic tooth (tooth 31) with dentinogenesis imperfecta. The 1-, 3-, 7-, and 12-month postoperative recall revealed complete healing of periapical lesions. Root maturation characterized by elongation of root, thickening of dentinal walls, and closure of root apex was observed with radiographic examinations. We show that RET could be a desirable treatment for necrotic immature permanent teeth with dentinogenesis imperfecta and lead to resolution of endodontic lesions as well as maturation of dental root. The findings of this case suggest that RET should be considered by endodontist and pediatric dentist to treat teeth with similar dental anomalies and apical periodontitis.
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Affiliation(s)
- Ying Liao
- Department of Pediatric Dentistry, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China
| | - Ting Pan
- Department of Pediatric Dentistry, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China
| | - Xianghui Xing
- Department of Pediatric Dentistry, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210008, China
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de La Dure-Molla M, Gaucher C, Dupré N, Bloch Zupan A, Berdal A, Chaussain C. [The tooth: A marker of developmental abnormalities]. Med Sci (Paris) 2024; 40:16-23. [PMID: 38299898 DOI: 10.1051/medsci/2023190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024] Open
Abstract
Tooth formation results from specific epithelial-mesenchymal interactions, which summarize a number of developmental processes. Tooth anomalies may thus reflect subclinical diseases of the kidney, bone and more broadly of the mineral metabolism, skin or nervous system. Odontogenesis starts from the 3rd week of intrauterine life by the odontogenic orientation of epithelial cells by a first PITX2 signal. The second phase is the acquisition of the number, shape, and position of teeth. It depends on multiple transcription and growth factors (BMP, FGF, SHH, WNT). These ecto-mesenchymal interactions guide cell migration, proliferation, apoptosis and differentiation ending in the formation of the specific dental mineralized tissues. Thus, any alteration will have consequences on the tooth structure or shape. Resulting manifestations will have to be considered in the patient phenotype and the multidisciplinary care, but also may contribute to identify the altered genetic circuity.
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Affiliation(s)
- Muriel de La Dure-Molla
- Centre de référence maladies rares orales et dentaires, O-Rares, hôpital Rothschild, AP-HP, Paris ; université Paris Cité, UFR d'odontologie, Inserm, UMR1163, bases moléculaires et physiopathologiques des ostéochondrodysplasies, institut imagine, Paris ; FHU DDS Paris-Net, filière TETECOU, European Reference Network CRANIO
| | - Céline Gaucher
- FHU DDS Paris-Net, université Paris Cité, Inserm, AP-HP ; laboratoire BRIO URP2496, UFR d'odontologie, université Paris Cité, France ; Service de médecine bucco-dentaire, hôpital Henri Mondor, AP-HP ; Service de médecine génomique des maladies rares de système et d'organe, hôpital Cochin, AP-HP, Centre-Université Paris Cité, Montrouge, France
| | - Nicolas Dupré
- FHU DDS Paris-Net, université Paris Cité, Inserm, APHP ; équipe « Physiopathologie orale moléculaire », Centre de recherche des Cordeliers, Inserm U1138, université Paris Cité, Sorbonne université. UFR d'odontologie université Paris Cité. Centre de référence maladies rares O-Rares, hôpital Rothschild, AP-HP, Paris ; filière TETECOU, European Reference Network CRANIO, Paris
| | - Agnès Bloch Zupan
- Université de Strasbourg, institut de génétique et de biologie moléculaire et cellulaire (IGBMC), Inserm U1258, CNRS- UMR7104, Illkirch ; faculté de chirurgie dentaire Robert Frank ; institut d'études avancées (USIAS) ; Hôpitaux universitaires de Strasbourg (HUS), pôle de médecine et chirurgie bucco-dentaires, hôpital civil, centre de référence des maladies rares orales et dentaires O-Rares, filière santé maladies rares TETE COU, European Reference Network CRANIO, Strasbourg
| | - Ariane Berdal
- FHU DDS Paris-Net, université Paris Cité, Inserm AP-HP, équipe « Physiopathologie orale moléculaire », centre de recherche des Cordeliers, Inserm U1138, université Paris Cité, Sorbonne université. UFR d'odontologie, université Paris Cité. centre de référence maladies Rares O-Rares, hôpital Rothschild, AP-HP, Paris, filière TETECOU, European Reference Network CRANIO, Paris
| | - Catherine Chaussain
- FHU DDS Paris-Net, université Paris Cité, Inserm, AP-HP ; laboratoire BRIO URP2496, UFR d'odontologie ; AP-HP, hôpital Bretonneau ; centre de référence maladies Rares du métabolisme du calcium, phosphate et magnésium, filière OSCAR, European Reference Network BOND, Paris
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H.A Sabrah A, Hammad MM, Wahab FK, AlHadidi A, Salim NA, Alelaimat AF, Khatib I. A prospective case series in regenerative endodontics: The effective use of diluted antibiotic hydrogels in endodontic regeneration procedures. Saudi Dent J 2023; 35:854-860. [PMID: 38025603 PMCID: PMC10658392 DOI: 10.1016/j.sdentj.2023.06.005] [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: 01/08/2023] [Revised: 06/14/2023] [Accepted: 06/17/2023] [Indexed: 12/01/2023] Open
Abstract
Objective to investigate the effectiveness of diluted antibiotic hydrogels in endodontic regeneration procedures. Materials and Methods One conventional treatment (calcium hydroxide) and two experimental treatments containing 1 mg/mL antibiotic in gel (MC-TAP and MC-DAP) were prepared for this study. The effect of these medicaments on the proliferation and differentiation potential of dental pulp stem cells (DPSCs) was examined before their clinical use, using WST and ALP assays. Twenty-two teeth diagnosed with necrotic immature roots were treated with calcium hydroxide, MC-TAP or MC-DAP using the endodontic regeneration protocol as described by the American Association of Endodontists (AAE). Teeth were examined after application of the medicament, at the time of regeneration and after 12-24 months. Results All treated teeth showed resolution of signs and symptoms shortly after treatment with the different medicaments. However, signs and symptoms returned a few months after initial treatment in clinical cases treated with MC-DAP. All successfully treated teeth examined after 12-24 months were free of signs and symptoms, but vitality was not achieved. Conclusion Low concentration antibiotic gel containing triple antibiotic paste (MC-TAP) can be successfully used for endodontic regeneration procedures.
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Affiliation(s)
- Alaa H.A Sabrah
- The University of Jordan, Department of Restorative dentistry, Amman 11942, Jordan
| | - Mohammad M. Hammad
- The University of Jordan, Department of Restorative dentistry, Amman 11942, Jordan
| | - Fouad K Wahab
- The University of Jordan, Department of Restorative dentistry, Amman 11942, Jordan
| | - Abeer AlHadidi
- The University of Jordan, Department of maxillofacial surgery, Amman 11942, Jordan
| | - Nesreen A Salim
- The University of Jordan, Department of Removable prosthodontics, Amman 11942, Jordan
| | | | - Ibrahim Khatib
- The University of Jordan, Department of Removable prosthodontics, Amman 11942, Jordan
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Schultz KM, Penner CR. A Review of Selected Dental Anomalies With Histologic Features in the Pediatric Patient. Pediatr Dev Pathol 2023; 26:572-582. [PMID: 37962547 DOI: 10.1177/10935266231207045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Unique dental conditions in children include odontogenic cysts and tumors, hereditary dental diseases, developmental anomalies, and lesions associated with the eruption of the primary or permanent teeth. Many of these conditions have long lasting effects on the adult dentition in terms of affecting esthetics, function, and overall quality of life. Inherited dental syndromes affect the dental hard tissues specifically the enamel, dentin, and/or cementum in a generalized manner, involving both primary and permanent teeth. These conditions manifest in altered quality or quantity of the hard tissues, leading to fragility, tooth loss and dental diseases such as caries, periapical pathology, and periodontal disease. This category includes amelogenesis imperfecta, dentinogenesis imperfecta, dentin dysplasia, hypophosphatasia, and hypophosphatemia. Developmental defects such as regional odontodysplasia are defined by involvement of the primary and permanent dentition in a localized manner, identified in early childhood. This review will elaborate on the histologic findings in these selected dental conditions with a discussion on clinical and radiographic findings, as well as molecular features wherever appropriate.
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Affiliation(s)
- Kathleen M Schultz
- Divisions of Pediatric Dentistry and Oral and Maxillofacial Pathology, Department of Dental Medicine, Zucker School of Medicine at Hofstra/Northwell Health, New Hyde Park, NY, USA
| | - Carla R Penner
- Department of Pathology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
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Nasseri S, Parsa S, Vahabzadeh Z, Baban B, Khademerfan MB, Nikkhoo B, Rastegar Khosravi M, Bahrami S, Fathi F. CRISPR/Cas9-Induced Fam83h Knock-out Leads to Impaired Wnt/β-Catenin Pathway and Altered Expression of Tooth Mineralization Genes in Mice. IRANIAN JOURNAL OF BIOTECHNOLOGY 2023; 21:e3673. [PMID: 38269199 PMCID: PMC10804060 DOI: 10.30498/ijb.2023.391902.3673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 08/19/2023] [Indexed: 01/26/2024]
Abstract
Background Dental enamel formation is a complex process that is regulated by various genes. One such gene, Family With Sequence Similarity 83 Member H (Fam83h), has been identified as an essential factor for dental enamel formation. Additionally, Fam83h has been found to be potentially linked to the Wnt/β-catenin pathway. Objectives This study aimed to investigate the effects of the Fam83h knockout gene on mineralization and formation of teeth, along with mediators of the Wnt/β-catenin pathway as a development aspect in mice. Materials and Methods To confirm the Fam83h-KnockOut mice, both Sanger sequencing and Western blot methods were used. then used qPCR to measure the expression levels of genes related to tooth mineralization and formation of dental root, including Fam20a, Dspp, Dmp1, Enam, Ambn, Sppl2a, Mmp20, and Wnt/β-catenin pathway mediators, in both the Fam83h-Knockout and wild-type mice at 5, 11 and 18 days of age. also the expression level of Fgf10 and mediators of the Wnt/β-catenin pathway was measured in the skin of both Knockout and wild-type mice using qPCR. A histological assessment was then performed to further investigate the results. Results A significant reduction in the expression levels of Ambn, Mmp20, Dspp, and Fgf10 in the dental root of Fam83h-Knockout mice compared to their wild-type counterparts was demonstrated by our results, indicating potential disruptions in tooth development. Significant down-regulation of CK1a, CK1e, and β-catenin in the dental root of Fam83h-Knockout mice was associated with a reduction in mineralization and formation-related gene. Additionally, the skin analysis of Fam83h-Knockout mice revealed reduced levels of Fgf10, CK1a, CK1e, and β-catenin. Further histological assessment confirmed that the concurrent reduction of Fgf10 expression level and Wnt/β-catenin genes were associated with alterations in hair follicle maturation. Conclusions The concurrent reduction in the expression level of both Wnt/β-catenin mediators and mineralization-related genes, resulting in the disruption of dental mineralization and formation, was caused by the deficiency of Fam83h. Our findings suggest a cumulative effect and multi-factorial interplay between Fam83h, Wnt/Β-Catenin signaling, and dental mineralization-related genes subsequently, during the dental formation process.
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Affiliation(s)
- Sherko Nasseri
- Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Department of Molecular Medicine and Medical biotechnology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Sara Parsa
- Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Zakaria Vahabzadeh
- Liver and Digestive Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Department of Biochemistry, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Babak Baban
- Department of Oral Biology and Diagnostic Sciences, Dental College of Georgia, Augusta University, Augusta, Georgia
| | - Mohammad Bagher Khademerfan
- Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Department of Molecular Medicine and Medical biotechnology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Bahram Nikkhoo
- Department of Pathology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Mohammad Rastegar Khosravi
- Department of Endodontics, Faculty of Dentistry, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Saman Bahrami
- Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Fardin Fathi
- Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
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Chen S, Wang F, Yang G, Yuan G, Liu M, Goldman G, Harris S, Wang W, Chen Z, Mary M. Loss of Bmp2 impairs odontogenesis via dysregulating pAkt/pErk/GCN5/Dlx3/Sp7. RESEARCH SQUARE 2023:rs.3.rs-3299295. [PMID: 37790473 PMCID: PMC10543288 DOI: 10.21203/rs.3.rs-3299295/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
BMP2 signaling plays a pivotal role in odontoblast differentiation and maturation during odontogenesis. Teeth lacking Bmp2 exhibit a morphology reminiscent of dentinogenesis imperfecta (DGI), associated with mutations in dentin matrix protein 1 (DMP1) and dentin sialophosphoprotein (DSPP) genes. Mechanisms by which BMP2 signaling influences expressions of DSPP and DMP1 and contributes to DGI remain elusive. To study the roles of BMP2 in dentin development, we generated Bmp2 conditional knockout (cKO) mice. Through a comprehensive approach involving RNA-seq, immunohistochemistry, promoter activity, ChIP, and Re-ChIP, we investigated downstream targets of Bmp2. Notably, the absence of Bmp2 in cKO mice led to dentin insufficiency akin to DGI. Disrupted Bmp2 signaling was linked to decreased expression of Dspp and Dmp1, as well as alterations in intracellular translocation of transcription factors Dlx3 and Sp7. Intriguingly, upregulation of Dlx3, Dmp1, Dspp, and Sp7, driven by BMP2, fostered differentiation of dental mesenchymal cells and biomineralization. Mechanistically, BMP2 induced phosphorylation of Dlx3, Sp7, and histone acetyltransferase GCN5 at Thr and Tyr residues, mediated by Akt and Erk42/44 kinases. This phosphorylation facilitated protein nuclear translocation, promoting interactions between Sp7 and Dlx3, as well as with GCN5 on Dspp and Dmp1 promoters. The synergy between Dlx3 and Sp7 bolstered transcription of Dspp and Dmp1. Notably, BMP2-driven GCN5 acetylated Sp7 and histone H3, while also recruiting RNA polymerase II to Dmp1 and Dspp chromatins, enhancing their transcriptions. Intriguingly, BMP2 suppressed the expression of histone deacetylases. we unveil hitherto uncharted involvement of BMP2 in dental cell differentiation and dentine development through pAkt/pErk42/44/Dlx3/Sp7/GCN5/Dspp/Dmp1.
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Affiliation(s)
- Shuo Chen
- UT Health Science Center at San Antonio
| | | | | | | | - Mengmeng Liu
- School of Dentistry, the University of Texas Health Science Center at San Antonio
| | - Graham Goldman
- School of Dentistry, the University of Texas Health Science Center at San Antonio
| | | | | | - Zhi Chen
- Wuhan University School and Hospital of Stomatology
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Yuan M, Zheng X, Xue Y, He Z, Song G, Song Y. A novel DSPP frameshift mutation causing dentin dysplasia type 2 and disease management strategies. Oral Dis 2023; 29:2394-2400. [PMID: 36597617 DOI: 10.1111/odi.14494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/05/2023]
Abstract
The present study aims to investigate the mutation in a Chinese family with dentin dysplasia type II (DD-II) and to summarize mutation hotspots, clinical manifestations, and disease management strategies. Phenotype analysis, clinical intervention, mutation screening, and cosegregation analysis within the enrolled family were performed. A summary of the reported mutations in the dentin phosphoprotein (DPP) region of dentin sialophosphoprotein (DSPP) was analyzed. Pathogenicity prediction analysis of the physical properties and function of DSPP variants was performed by bioinformatic processing. Clinical management strategies are discussed. A novel pathogenic mutation (c.2035delA) in the DPP region of DSPP was identified, which was cosegregated in the family. The immature permanent teeth of patients with DD-II presented with X-shaped root canal phenotypes. Most of the identified mutations for DD-II were clustered in the DPP region between nucleotides 1686-2134. Points of differential diagnosis, clinical interventions, and management strategies are proposed. This study revealed a novel DSPP frameshift mutation and presented new clinical features of DD-II. The locus involving nucleotides 1686-2134 of DSPP may represent a mutational hotspot for the disease. Appropriate management of DD-II at different stages is important to avoid the development of secondary dental lesions.
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Affiliation(s)
- Minyan Yuan
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Xueqing Zheng
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Yifan Xue
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Zhenru He
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Guangtai Song
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Yaling Song
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
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Su T, Zhu Y, Wang X, Zhu Q, Duan X. Hereditary dentin defects with systemic diseases. Oral Dis 2023; 29:2376-2393. [PMID: 37094075 DOI: 10.1111/odi.14589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 03/31/2023] [Accepted: 04/06/2023] [Indexed: 04/26/2023]
Abstract
OBJECTIVE This review aimed to summarize recent progress on syndromic dentin defects, promoting a better understanding of systemic diseases with dentin malformations, the molecules involved, and related mechanisms. SUBJECTS AND METHODS References on genetic diseases with dentin malformations were obtained from various sources, including PubMed, OMIM, NCBI, and other websites. The clinical phenotypes and genetic backgrounds of these diseases were then summarized, analyzed, and compared. RESULTS Over 10 systemic diseases, including osteogenesis imperfecta, hypophosphatemic rickets, vitamin D-dependent rickets, familial tumoral calcinosis, Ehlers-Danlos syndrome, Schimke immuno-osseous dysplasia, hypophosphatasia, Elsahy-Waters syndrome, Singleton-Merten syndrome, odontochondrodysplasia, and microcephalic osteodysplastic primordial dwarfism type II were examined. Most of these are bone disorders, and their pathogenic genes may regulate both dentin and bone development, involving extracellular matrix, cell differentiation, and metabolism of calcium, phosphorus, and vitamin D. The phenotypes of these syndromic dentin defects various with the involved genes, part of them are similar to dentinogenesis imperfecta or dentin dysplasia, while others only present one or two types of dentin abnormalities such as discoloration, irregular enlarged or obliterated pulp and canal, or root malformation. CONCLUSION Some specific dentin defects associated with systemic diseases may serve as important phenotypes for dentists to diagnose. Furthermore, mechanistic studies on syndromic dentin defects may provide valuable insights into isolated dentin defects and general dentin development or mineralization.
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Affiliation(s)
- Tongyu Su
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral Biology & Clinic of Oral Rare and Genetic Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Yulong Zhu
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral Biology & Clinic of Oral Rare and Genetic Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Xiangpu Wang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral Biology & Clinic of Oral Rare and Genetic Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Qinglin Zhu
- Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Xi'an, China
| | - Xiaohong Duan
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Oral Biology & Clinic of Oral Rare and Genetic Diseases, School of Stomatology, The Fourth Military Medical University, Xi'an, China
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16
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Zhang Z, Huang G, Huang Y, Liu S, Chen F, Gao X, Dong Y, Tian H. Novel dentin sialophosphoprotein gene frameshift mutations affect dentin mineralization. Arch Oral Biol 2023; 151:105701. [PMID: 37084484 DOI: 10.1016/j.archoralbio.2023.105701] [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: 11/27/2022] [Revised: 04/12/2023] [Accepted: 04/15/2023] [Indexed: 04/23/2023]
Abstract
OBJECTIVE This study aimed to identify candidate genes for inheritable dentin defects in three Chinese pedigrees and characterize the property of affected teeth. DESIGN Clinical and radiological features were recorded for the affected individuals. Genomic DNA obtained from peripheral venous blood or saliva were analyzed by whole-exome sequencing. The density and microhardness of affected dentin was measured. Scanning electron microscopy (SEM) was also performed to obtain the microstructure phenotype. RESULTS 1) General appearance: the affected dentitions shared yellowish-brown or milky color. Radiographs showed that the pulp cavity and root canals were obliterated in varying degrees or exhibited a pulp aspect in the 'thistle tube'. Some patients exhibited periapical infections without pulpal exposure, and some affected individuals showed shortened, abnormally thin roots accompanied by severe alveolar bone loss. 2) Genomic analysis: three new frameshift mutations (NM_014208.3: c.2833delA, c.2852delGand c.3239delA) were identified in exon 5 of dentin sialophosphoprotein (DSPP) gene, altering dentin phosphoprotein (DPP) as result. In vitro studies showed that the density and microhardness of affected dentin were decreased, the dentinal tubules were sparse and arranged disorderly, and the dentinal-enamel-junction (DEJ) was abnormal. CONCLUSIONS In this study, we identified three novel frameshift mutations of dentin sialophosphoprotein gene related to inherited dentin defects. These mutations are speculated to cause abnormal coding of dentin phosphoprotein C-terminus, which affect dentin mineralization. These results expand the spectrum of dentin sialophosphoprotein gene mutations causing inheritable dentin defects and broaden our understanding of the biological mechanisms by which dentin forms.
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Affiliation(s)
- Zhenwei Zhang
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Guibin Huang
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Yu Huang
- Department of Medical Genetics, School of Basic Medical Sciences, Peking University Health and Science Center, Beijing, PR China
| | - Siyi Liu
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Feng Chen
- Central Laboratory, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Xuejun Gao
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Yanmei Dong
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, PR China.
| | - Hua Tian
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, PR China.
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Du Q, Cao L, Yan N, Kang S, Lin M, Cao P, Jia R, Wang C, Qi H, Yu Y, Zou J, Yang J. Identification of DSPP novel variants and phenotype analysis in dentinogenesis dysplasia Shields type II patients. Clin Oral Investig 2023:10.1007/s00784-023-05009-y. [PMID: 37017752 DOI: 10.1007/s00784-023-05009-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 03/28/2023] [Indexed: 04/06/2023]
Abstract
OBJECTIVES To investigate the genetic causes and teeth characteristics of dentin dysplasia Shields type II(DD-II) in three Chinese families. MATERIALS AND METHODS Data from three Chinese families affected with DD-II were collected. Whole-exome sequencing (WES) and whole-genome sequencing (WGS) were conducted to screen for variations, and Sanger sequencing was used to verify mutation sites. The physical and chemical characteristics of the affected teeth including tooth structure, hardness, mineral content, and ultrastructure were investigated. RESULTS A novel frameshift deletion mutation c.1871_1874del(p.Ser624fs) in DSPP was found in families A and B, while no pathogenic mutation was found in family C. The affected teeth's pulp cavities were obliterated, and the root canals were smaller than normal teeth and irregularly distributed comprising a network. The patients' teeth also had reduced dentin hardness and highly irregular dentinal tubules. The Mg content of the teeth was significantly lower than that of the controls, but the Na content was obviously higher than that of the controls. CONCLUSIONS A novel frameshift deletion mutation, c.1871_1874del (p.Ser624fs), in the DPP region of the DSPP gene causes DD-II. The DD-II teeth demonstrated compromised mechanical properties and changed ultrastructure, suggesting an impaired function of DPP. Our findings expand the mutational spectrum of the DSPP gene and strengthen the understanding of clinical phenotypes related to the frameshift deletion in the DPP region of the DSPP gene. CLINICAL RELEVANCE A DSPP mutation can alter the characteristics of the affected teeth, including tooth structure, hardness, mineral content, and ultrastructure.
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Affiliation(s)
- Qin Du
- Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, Sichuan, China
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Li Cao
- The Sichuan Provincial Key Laboratory for Human Disease Gene Study, Centre for Medical Genetics, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University of Electronic Science and Technology, No.32, Section 2, The First Ring Road West, Chengdu, 610072, China
- Research Unit for Blindness Prevention of Chinese Academy of Medical Sciences (2019RU026), Sichuan Academy of Medical Sciences, Chengdu, 610072, China
| | - Nana Yan
- Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, Sichuan, China
| | - Sujun Kang
- Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, Sichuan, China
| | - Mu Lin
- Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, Sichuan, China
| | - Peilin Cao
- Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, Sichuan, China
| | - Ran Jia
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Chenyang Wang
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Hanyu Qi
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
| | - Yue Yu
- State Key Laboratory of Oral Diseases & Department of Pediatric Dentistry, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, No. 14 Section 3, Renmin South Road, Chengdu, 610041, China
| | - Jing Zou
- State Key Laboratory of Oral Diseases & Department of Pediatric Dentistry, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, No. 14 Section 3, Renmin South Road, Chengdu, 610041, China.
| | - Jiyun Yang
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China.
- The Sichuan Provincial Key Laboratory for Human Disease Gene Study, Centre for Medical Genetics, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University of Electronic Science and Technology, No.32, Section 2, The First Ring Road West, Chengdu, 610072, China.
- Research Unit for Blindness Prevention of Chinese Academy of Medical Sciences (2019RU026), Sichuan Academy of Medical Sciences, Chengdu, 610072, China.
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Gadi LSA, Chau DYS, Parekh S. Morphological and Ultrastructural Collagen Defects: Impact and Implications in Dentinogenesis Imperfecta. Dent J (Basel) 2023; 11:95. [PMID: 37185473 PMCID: PMC10137525 DOI: 10.3390/dj11040095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 03/15/2023] [Accepted: 03/24/2023] [Indexed: 04/07/2023] Open
Abstract
Collagen is the building block for the extracellular matrix in bone, teeth and other fibrous tissues. Osteogenesis imperfecta (OI), or brittle bone disease, is a heritable disorder that results from defective collagen synthesis or metabolism, resulting in bone fragility. The dental manifestation of OI is dentinogenesis imperfecta (DI), a genetic disorder that affects dentin structure and clinical appearance, with a characteristic feature of greyish-brown discolouration. The aim of this study was to conduct a systematic review to identify and/or define any ultrastructural changes in dentinal collagen in DI. Established databases were searched: Cochrane Library, OVID Embase, OVID Medline and PubMed/Medline. Search strategies included: Collagen Ultrastructure, DI and OI. Inclusion criteria were studies written in English, published after 1990, that examined human dental collagen of teeth affected by DI. A Cochrane data extraction form was modified and used for data collection. The final dataset included seventeen studies published from 1993 to 2021. The most prevalent findings on collagen in DI teeth were increased coarse collagen fibres and decreased fibre quantity. Additional findings included changes to fibre orientation (i.e., random to parallel) and differences to the fibre organisation (i.e., regular to irregular). Ultrastructural defects and anomalies included uncoiled collagen fibres and increased D-banding periodicity. Studies in collagen structure in DI reported changes to the surface topography, quantity, organisation and orientation of the fibres. Moreover, ultrastructural defects such as the packing/coiling and D-banding of the fibrils, as well as differences in the presence of other collagens are also noted. Taken together, this study provides an understanding of the changes in collagen and its impact on clinical translation, paving the way for innovative treatments in dental treatment.
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Affiliation(s)
- Lubabah S. A. Gadi
- Department of Paediatric Dentistry, Eastman Dental Institute, University College London, Bloomsbury Campus, Rockefeller Building, 21 University Street, London WC1E 6DE, UK (S.P.)
- Department of Paediatric Dentistry, King Abdulaziz University Dental Hospital, Al Ehtifalat Street, Jeddah 22252, Saudi Arabia
| | - David Y. S. Chau
- Department of Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK
| | - Susan Parekh
- Department of Paediatric Dentistry, Eastman Dental Institute, University College London, Bloomsbury Campus, Rockefeller Building, 21 University Street, London WC1E 6DE, UK (S.P.)
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Kim SJ, Yoon JS, Hwang IT. A Novel Heterozygous ACAN Variant in a Short Patient Born Small for Gestational Age with Recurrent Patellar Dislocation: A Case Report. J Clin Res Pediatr Endocrinol 2022; 14:481-484. [PMID: 34210114 PMCID: PMC9724056 DOI: 10.4274/jcrpe.galenos.2021.2021.0081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
ACAN variants can manifest as various clinical features, including short stature, advanced bone age (BA), and skeletal defects. Here, we report rare clinical manifestations of ACAN defects in a 9 year, 5 month-old girl born small for gestational age (SGA), who presented with short stature, and was initially diagnosed with idiopathic growth hormone deficiency. She displayed several dysmorphic features, including genu valgum, cubitus valgus, and recurrent patellar dislocations. She presented with progressive advancement of BA compared with chronological age. Whole exome sequencing confirmed the presence of a novel heterozygous nonsense variant, c.1968C>G, p.(Tyr656*), in ACAN. ACAN variants should be considered in short stature patients born SGA with joint problems, particularly those with recurrent patellar dislocation and genu valgum.
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Affiliation(s)
- Su Ji Kim
- Hallym University Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Department of Pediatrics, Seoul, Korea
| | - Jong Seo Yoon
- Hallym University Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Department of Pediatrics, Seoul, Korea
| | - Il Tae Hwang
- Hallym University Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Department of Pediatrics, Seoul, Korea,* Address for Correspondence: Hallym University Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Department of Pediatrics, Seoul, Korea Phone: +82-10-2396-1772 E-mail:
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Yeter B, Aslanger AD, Yeşil G, Elçioğlu NH. A Novel Mutation in the TRIP11 Gene: Diagnostic Approach from Relatively Common Skeletal Dysplasias to an Extremely Rare Odontochondrodysplasia. J Clin Res Pediatr Endocrinol 2022; 14:475-480. [PMID: 34111908 PMCID: PMC9724053 DOI: 10.4274/jcrpe.galenos.2021.2021.0099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Odontochondrodysplasia (ODCD, OMIM #184260) is a rare, non-lethal skeletal dysplasia characterized by involvement of the spine and metaphyseal regions of the long bones, pulmonary hypoplasia, short stature, joint hypermobility, and dentinogenesis imperfecta. ODCD is inherited in an autosomal recessive fashion with an unknown frequency caused by mutations of the thyroid hormone receptor interactor 11 gene (TRIP11; OMIM *604505). The TRIP11 gene encodes the Golgi microtubule-associated protein 210 (GMAP-210), which is an indispensable protein for the function of the Golgi apparatus. Mutations in TRIP11 also cause achondrogenesis type 1A (ACG1A). Null mutations of TRIP11 lead to ACG1A, also known as a lethal skeletal dysplasia, while hypomorphic mutations cause ODCD. Here we report a male child diagnosed as ODCD with a novel compound heterozygous mutation who presented with skeletal changes, short stature, dentinogenesis imperfecta, and facial dysmorphism resembling achondroplasia and hypochondroplasia.
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Affiliation(s)
- Burcu Yeter
- Marmara University Faculty of Medicine, Department of Pediatric Genetics, İstanbul, Turkey,* Address for Correspondence: Marmara University Faculty of Medicine, Department of Pediatric Genetics, İstanbul, Turkey Phone: +90 507 973 08 40 E-mail:
| | - Ayca Dilruba Aslanger
- İstanbul University Faculty of Medicine, Department of Medical Genetics, İstanbul, Turkey
| | - Gözde Yeşil
- İstanbul University Faculty of Medicine, Department of Medical Genetics, İstanbul, Turkey
| | - Nursel H. Elçioğlu
- Marmara University Faculty of Medicine, Department of Pediatric Genetics, İstanbul, Turkey,Eastern Mediterranean University Faculty of Medicine, Department of Pediatric Genetics, Mersin, Turkey
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21
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Mack Wilson J, Bell C, Queck K, Scott K. A Review of Dentinogenesis Imperfecta and Primary Dentin Disorders in Dogs. J Vet Dent 2022; 39:376-390. [DOI: 10.1177/08987564221123419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This review describes the clinical, radiographic and histologic characteristics of dentinogenesis imperfecta diagnosed in two unrelated young dogs without evidence of concurrent osteogenesis imperfecta. The dentition was noted to have generalized coronal discoloration ranging from grey-blue to golden brown. Clinical pulp exposure, coronal wear and fractures were observed as was radiographic evidence of endodontic disease, thin dentin walls or dystrophic obliteration of the pulp canal. The enamel was severely affected by attrition and abrasion despite histologically normal areas; loss was most likely due to poor adherence or support by the underlying abnormal dentin. Histologically, permanent and deciduous teeth examined showed thin, amorphous dentin without organized dentin tubules and odontoblasts had dysplastic cell morphology. Primary dentin disorders, including dentinogenesis imperfecta and dentin dysplasia, have been extensively studied and genetically characterized in humans but infrequently reported in dogs. Treatment in human patients is aimed at early recognition and multi-disciplinary intervention to restore and maintain normal occlusion, aesthetics, mastication and speech. Treatment in both humans and canine patients is discussed as is the documented genetic heritability of primary dentin disorders in humans.
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Affiliation(s)
| | - Cynthia Bell
- Specialty Oral Pathology for Animals, LLC, Geneseo, IL, USA
| | - Katherine Queck
- Hospital for Veterinary Dentistry and Oral Surgery, Matthews, NC, USA
| | - Kristin Scott
- Hospital for Veterinary Dentistry and Oral Surgery, Matthews, NC, USA
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22
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Riou MC, de La Dure-Molla M, Kerner S, Rondeau S, Legendre A, Cormier-Daire V, Fournier BPJ. Oral Phenotype of Singleton-Merten Syndrome: A Systematic Review Illustrated With a Case Report. Front Genet 2022; 13:875490. [PMID: 35754802 PMCID: PMC9218817 DOI: 10.3389/fgene.2022.875490] [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: 02/14/2022] [Accepted: 04/27/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Singleton-Merten syndrome type 1 (SGMRT1) is a rare autosomal dominant disorder caused by IFIH1 variations with blood vessel calcifications, teeth anomalies, and bone defects. Aim: We aimed to summarize the oral findings in SGMRT1 through a systematic review of the literature and to describe the phenotype of a 10-year-old patient with SGMRT1 diagnosis. Results: A total of 20 patients were described in the literature, in nine articles. Eight IFIH1 mutations were described in 11 families. Delayed eruption, short roots, and premature loss of permanent teeth were the most described features (100%). Impacted teeth (89%) and carious lesions (67%) were also described. Our patient, a 10-year-old male with Singleton-Merten syndrome, presented numerous carious lesions, severe teeth malposition, especially in the anterior arch, and an oral hygiene deficiency with a 100% plaque index. The panoramic X-ray did not show any dental agenesis but revealed very short roots and a decrease in the jaw alveolar bone height. The whole-genome sequencing analysis revealed a heterozygous de novo variant in IFIH1 (NM_022168.4) c.2465G > A (p.Arg822Gln). Conclusion: Confused descriptions of oral features occurred in the literature between congenital findings and "acquired" pathology, especially carious lesions. The dental phenotype of these patients encompasses eruption anomalies (delayed eruption and impacted teeth) and lack of root edification, leading to premature loss of permanent teeth, and it may contribute to the diagnosis. An early diagnosis is essential to prevent teeth loss and to improve the quality of life of these patients. Systematic Review Registration: [https://www.crd.york.ac.uk/prospero/], identifier [CRD42022300025].
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Affiliation(s)
- Margot Charlotte Riou
- Centre de Recherche des Cordeliers, UMRS 1138, Molecular Oral Pathophysiology, Université de Paris, INSERM, Sorbonne Université, Paris, France.,Dental Department, Reference Center for Oral and Dental Rare Diseases, AP-HP, Rothschild Hospital (ORARES), Paris, France.,Dental Faculty, Université de Paris, Paris, France
| | - Muriel de La Dure-Molla
- Dental Department, Reference Center for Oral and Dental Rare Diseases, AP-HP, Rothschild Hospital (ORARES), Paris, France.,Dental Faculty, Université de Paris, Paris, France.,INSERM U1163 Institut Imagine, Paris, France
| | - Stéphane Kerner
- Dental Department, Reference Center for Oral and Dental Rare Diseases, AP-HP, Rothschild Hospital (ORARES), Paris, France.,Dental Faculty, Université de Paris, Paris, France
| | - Sophie Rondeau
- Department of Genetics, Necker Enfants Malades Hospital, Paris Descartes-Sorbonne Paris Cité University, Paris, France
| | - Adrien Legendre
- Laboratoire de Biologie Médicale Multisites Seqoia-FMG2025, Paris, France
| | | | - Benjamin P J Fournier
- Centre de Recherche des Cordeliers, UMRS 1138, Molecular Oral Pathophysiology, Université de Paris, INSERM, Sorbonne Université, Paris, France.,Dental Department, Reference Center for Oral and Dental Rare Diseases, AP-HP, Rothschild Hospital (ORARES), Paris, France.,Dental Faculty, Université de Paris, Paris, France
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23
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Azpiazu-Flores FX, Knobloch LA, Larsen PE. Interdisciplinary Management of a Patient with Dentinogenesis Imperfecta Type II Using a Combination of CAD-CAM and Analog Techniques: A Clinical Report. J Prosthodont 2022; 31:647-654. [PMID: 35675448 DOI: 10.1111/jopr.13556] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/29/2022] [Indexed: 11/29/2022] Open
Abstract
Type II dentinogenesis imperfecta is an autosomal dominant condition that affects dentin which increases the complexity of the predictability of restorative treatment. Computer-aided design and computer-aided manufacturing (CAD-CAM) technologies permit the creation of highly accurate devices and dental prostheses that simplify the planning and execution of advanced implant surgery and full-mouth rehabilitation. This clinical report presents the interdisciplinary management of a 20-year-old male with dentinogenesis imperfecta type II. In this article, a combination of analog and CAD-CAM technologies were used to fabricate devices that aided planning, assisted intermaxillary fixation and implant placement, served as interim prostheses, and permitted the accurate establishment of esthetics and occlusion of the definitive full-arch prostheses.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Advanced Prosthodontics Program, The Ohio State University College of Dentistry, Columbus, OH.,Department of Restorative Dentistry, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada
| | - Lisa A Knobloch
- Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, OH
| | - Peter E Larsen
- Division of Oral and Maxillofacial Surgery and Anesthesiology, The Ohio State University College of Dentistry, Columbus, OH
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24
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The Modified Shields Classification and 12 Families with Defined DSPP Mutations. Genes (Basel) 2022; 13:genes13050858. [PMID: 35627243 PMCID: PMC9141616 DOI: 10.3390/genes13050858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/28/2022] [Accepted: 05/03/2022] [Indexed: 12/14/2022] Open
Abstract
Mutations in Dentin Sialophosphoprotein (DSPP) are known to cause, in order of increasing severity, dentin dysplasia type-II (DD-II), dentinogenesis imperfecta type-II (DGI-II), and dentinogenesis imperfecta type-III (DGI-III). DSPP mutations fall into two groups: a 5′-group that affects protein targeting and a 3′-group that shifts translation into the −1 reading frame. Using whole-exome sequence (WES) analyses and Single Molecule Real-Time (SMRT) sequencing, we identified disease-causing DSPP mutations in 12 families. Three of the mutations are novel: c.53T>C/p.(Val18Ala); c.3461delG/p.(Ser1154Metfs*160); and c.3700delA/p.(Ser1234Alafs*80). We propose genetic analysis start with WES analysis of proband DNA to identify mutations in COL1A1 and COL1A2 causing dominant forms of osteogenesis imperfecta, 5′-DSPP mutations, and 3′-DSPP frameshifts near the margins of the DSPP repeat region, and SMRT sequencing when the disease-causing mutation is not identified. After reviewing the literature and incorporating new information showing distinct differences in the cell pathology observed between knockin mice with 5′-Dspp or 3′-Dspp mutations, we propose a modified Shields Classification based upon the causative mutation rather than phenotypic severity such that patients identified with 5′-DSPP defects be diagnosed as DGI-III, while those with 3′-DSPP defects be diagnosed as DGI-II.
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25
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Abstract
Non-syndromic inherited defects of tooth dentin are caused by two classes of dominant negative/gain-of-function mutations in dentin sialophosphoprotein (DSPP): 5' mutations affecting an N-terminal targeting sequence and 3' mutations that shift translation into the - 1 reading frame. DSPP defects cause an overlapping spectrum of phenotypes classified as dentin dysplasia type II and dentinogenesis imperfecta types II and III. Using CRISPR/Cas9, we generated a Dspp-1fs mouse model by introducing a FLAG-tag followed by a single nucleotide deletion that translated 493 extraneous amino acids before termination. Developing incisors and/or molars from this mouse and a DsppP19L mouse were characterized by morphological assessment, bSEM, nanohardness testing, histological analysis, in situ hybridization and immunohistochemistry. DsppP19L dentin contained dentinal tubules but grew slowly and was softer and less mineralized than the wild-type. DsppP19L incisor enamel was softer than normal, while molar enamel showed reduced rod/interrod definition. Dspp-1fs dentin formation was analogous to reparative dentin: it lacked dentinal tubules, contained cellular debris, and was significantly softer and thinner than Dspp+/+ and DsppP19L dentin. The Dspp-1fs incisor enamel appeared normal and was comparable to the wild-type in hardness. We conclude that 5' and 3' Dspp mutations cause dental malformations through different pathological mechanisms and can be regarded as distinct disorders.
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26
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Li M, Yang S, Song J, Fu T, Liang P, Gao Z, Tang J, Guo L. Different grinding speeds affect induced regeneration capacity of human treated dentin matrix. J Biomed Mater Res B Appl Biomater 2021; 110:755-767. [PMID: 34637601 DOI: 10.1002/jbm.b.34954] [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: 10/26/2020] [Revised: 09/18/2021] [Accepted: 09/29/2021] [Indexed: 11/07/2022]
Abstract
Human-treated dentin matrix (hTDM) is a biomaterial scaffold, which can induce implant cells to differentiate into odontoblasts and then form neo-dentin. However, hTDM with long storage or prepared by high-speed handpiece would not to form neo-dentin. In this research, we developed two fresh hTDM with different grinding speeds, which were low-speed hTDM (LTDM) with maximum speed of 500 rpm and high-speed hTDM (HTDM) with a speed of 3,80,000 rpm. Here, we aim to understand whether there were induced regeneration capacity differences between LTDM and HTDM. Scanning electron microscope showed that DFCs grew well on both materials, but the morphology of DFCs and the extracellular matrix was different. Especially, the secreted extracellular matrixes on the inner surface of LTDM were regular morphology and ordered arrangement around the dentin tubules. The transcription-quantitative polymerase chain reaction (qRT-PCR), western blot and immunofluorescence assay showed that the dentin markers DSPP and DMP-1 were about 2× greater in DFCs induced by LTDM than by HTDM, and osteogenic marker BSP was about 2× greater in DFCs induced by HTDM than by LTDM. Histological examinations of the harvested grafts observed the formation of neo-tissue were different, and there were neo-dentin formed on the inner surface of LTDM and neo-cementum formed on the outer surface of HTDM. In summary, it found that the induction abilities of LTDM and HTDM are different, and the dentin matrix is directional. This study lays a necessary foundation for searching the key factors of dentin regeneration in future.
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Affiliation(s)
- Min Li
- Department of Stomatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China.,Department of Medical Cosmetology, Suining Central Hospital, Suining, China.,Department of Stomatology, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Sen Yang
- Stomatology Center, Suining Central Hospital, Suining, China
| | - Jinlin Song
- Chongqing Medical University Stomatology College, Chongqing, China.,Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Tiwei Fu
- Chongqing Medical University Stomatology College, Chongqing, China.,Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Panpan Liang
- Chongqing Medical University Stomatology College, Chongqing, China.,Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Zhi Gao
- Department of Stomatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jing Tang
- Department of Stomatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Lijuan Guo
- Department of Medical Cosmetology, Suining Central Hospital, Suining, China
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27
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Xu C, Xie X, Zhao L, Wu Y, Wang J. The critical role of nuclear factor I-C in tooth development. Oral Dis 2021; 28:2093-2099. [PMID: 34637578 DOI: 10.1111/odi.14046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 09/29/2021] [Accepted: 10/07/2021] [Indexed: 02/05/2023]
Abstract
OBJECTIVES Nuclear factor I-C (NFIC) plays a critical role in regulating epithelial-mesenchymal crosstalk during tooth development. However, it remains largely unknown about how NFIC functions in dentin and enamel formation. In the present review, we aim to summarize the most recent discoveries in the field and gain a better understanding of the roles NFIC performs during tooth formation. SUBJECTS AND METHODS Nfic-/- mice exhibit human dentin dysplasia type I (DDI)-like phenotypes signified by enlarged pulp chambers, the presence of short-root anomaly, and failure of odontoblast differentiation. Although loss of NFIC has little effect on molar crown morphology, researchers have detected aberrant microstructures of enamel in the incisors. Recently, accumulating evidence has further uncovered the novel function of NFIC in the process of enamel and dentin formation. RESULTS During epithelial-mesenchyme crosstalk, the expression of NFIC is under the control of SHH-PTCH-SMO-GLI1 pathway. NFIC is closely involved in odontoblast lineage cells proliferation and differentiation, and the maintenance of NFIC protein level in cytoplasm is negatively regulated by TGF-β signaling pathway. In addition, NFIC has mild effect on ameloblast differentiation, enamel mineralization and cementum formation. CONCLUSIONS NFIC plays an important role in tooth development and is required for the formation of dentin, enamel as well as cementum.
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Affiliation(s)
- Chunmei Xu
- State Key Laboratory of Oral Diseases, Department of Periodontics, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xudong Xie
- State Key Laboratory of Oral Diseases, Department of Periodontics, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Lei Zhao
- State Key Laboratory of Oral Diseases, Department of Periodontics, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yafei Wu
- State Key Laboratory of Oral Diseases, Department of Periodontics, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jun Wang
- State Key Laboratory of Oral Diseases, Department of Periodontics, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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28
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Jing Z, Chen Z, Jiang Y. Effects of DSPP Gene Mutations on Periodontal Tissues. Glob Med Genet 2021; 8:90-94. [PMID: 34430959 PMCID: PMC8378919 DOI: 10.1055/s-0041-1726416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Dentin sialophosphoprotein ( DSPP ) gene mutations cause autosomal dominantly inherited diseases. DSPP gene mutations lead to abnormal expression of DSPP, resulting in a series of histological, morphological, and clinical abnormalities. A large number of previous studies demonstrated that DSPP is a dentinal-specific protein, and DSPP gene mutations lead to dentin dysplasia and dentinogenesis imperfecta. Recent studies have found that DSPP is also expressed in bone, periodontal tissues, and salivary glands. DSPP is involved in the formation of the periodontium as well as tooth structures. DSPP deficient mice present furcation involvement, cementum, and alveolar bone defect. We speculate that similar periodontal damage may occur in patients with DSPP mutations. This article reviewed the effects of DSPP gene mutations on periodontal status. However, almost all of the research is about animal study, there is no evidence that DSPP mutations cause periodontium defects in patients yet. We need to conduct systematic clinical studies on DSPP mutation families in the future to elucidate the effect of DSPP gene on human periodontium.
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Affiliation(s)
- Zhaojun Jing
- Department of General Dentistry II, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People's Republic of China
| | - Zhibin Chen
- Department of Periodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, People's Republic of China
| | - Yong Jiang
- Department of General Dentistry II, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People's Republic of China
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29
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Qin W, Wan QQ, Ma YX, Wang CY, Wan MC, Ma S, Wang YR, Wang WR, Gu JT, Tay FR, Niu LN. Manifestation and Mechanisms of Abnormal Mineralization in Teeth. ACS Biomater Sci Eng 2021; 9:1733-1756. [PMID: 34436861 DOI: 10.1021/acsbiomaterials.1c00592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tooth biomineralization is a dynamic and complicated process influenced by local and systemic factors. Abnormal mineralization in teeth occurs when factors related to physiologic mineralization are altered during tooth formation and after tooth maturation, resulting in microscopic and macroscopic manifestations. The present Review provides timely information on the mechanisms and structural alterations of different forms of pathological tooth mineralization. A comprehensive study of these alterations benefits diagnosis and biomimetic treatment of abnormal mineralization in patients.
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Affiliation(s)
- Wen Qin
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
| | - Qian-Qian Wan
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
| | - Yu-Xuan Ma
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
| | - Chen-Yu Wang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
| | - Mei-Chen Wan
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
| | - Sai Ma
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
| | - Yi-Rong Wang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
| | - Wan-Rong Wang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
| | - Jun-Ting Gu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
| | - Franklin R Tay
- College of Graduate Studies, Augusta University, Augusta, Georgia 30912, United States
| | - Li-Na Niu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P. R. China
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30
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Liu M, Li W, Xia X, Wang F, MacDougall M, Chen S. Dentine sialophosphoprotein signal in dentineogenesis and dentine regeneration. Eur Cell Mater 2021; 42:43-62. [PMID: 34275129 PMCID: PMC9019922 DOI: 10.22203/ecm.v042a04] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Dentineogenesis starts on odontoblasts, which synthesise and secrete non-collagenous proteins (NCPs) and collagen. When dentine is injured, dental pulp progenitors/mesenchymal stem cells (MSCs) can migrate to the injured area, differentiate into odontoblasts and facilitate formation of reactionary dentine. Dental pulp progenitor cell/MSC differentiation is controlled at given niches. Among dental NCPs, dentine sialophosphoprotein (DSPP) is a member of the small integrin-binding ligand N-linked glycoprotein (SIBLING) family, whose members share common biochemical characteristics such as an Arg-Gly-Asp (RGD) motif. DSPP expression is cell- and tissue-specific and highly seen in odontoblasts and dentine. DSPP mutations cause hereditary dentine diseases. DSPP is catalysed into dentine glycoprotein (DGP)/sialoprotein (DSP) and phosphoprotein (DPP) by proteolysis. DSP is further processed towards active molecules. DPP contains an RGD motif and abundant Ser-Asp/Asp-Ser repeat regions. DPP-RGD motif binds to integrin αVβ3 and activates intracellular signalling via mitogen-activated protein kinase (MAPK) and focal adhesion kinase (FAK)-ERK pathways. Unlike other SIBLING proteins, DPP lacks the RGD motif in some species. However, DPP Ser-Asp/Asp-Ser repeat regions bind to calcium-phosphate deposits and promote hydroxyapatite crystal growth and mineralisation via calmodulin-dependent protein kinase II (CaMKII) cascades. DSP lacks the RGD site but contains signal peptides. The tripeptides of the signal domains interact with cargo receptors within the endoplasmic reticulum that facilitate transport of DSPP from the endoplasmic reticulum to the extracellular matrix. Furthermore, the middle- and COOH-terminal regions of DSP bind to cellular membrane receptors, integrin β6 and occludin, inducing cell differentiation. The present review may shed light on DSPP roles during odontogenesis.
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Affiliation(s)
- M.M. Liu
- Department of Developmental Dentistry, School of Dentistry, the University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA,Department of Endodontics, School of Stomatology, Tongji University, Shanghai, 200072, China
| | - W.T. Li
- Department of Developmental Dentistry, School of Dentistry, the University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA,Department of Pathology, Weifang Medical University, Weifang, 261053, China
| | - X.M. Xia
- Department of Developmental Dentistry, School of Dentistry, the University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA,Department of Obstetrics and Gynaecology, Second Xiangya Hospital, Central South University Changsha, 410011, China
| | - F. Wang
- Department of Anatomy, Fujian Medical University, Fuzhou, 350122, China
| | - M. MacDougall
- UBC Faculty of Dentistry, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
| | - S. Chen
- Department of Developmental Dentistry, School of Dentistry, the University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
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31
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Orthodontic Treatment of a Patient with Dentin Dysplasia Type I and Bilateral Maxillary Canine Impaction: Case Presentation and a Family-Based Genetic Analysis. CHILDREN-BASEL 2021; 8:children8060519. [PMID: 34207061 PMCID: PMC8234607 DOI: 10.3390/children8060519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/06/2021] [Accepted: 06/16/2021] [Indexed: 11/16/2022]
Abstract
Dentin dysplasia is a rare hereditary disorder, transmitted by autosomal dominant mode, affecting both dentin and pulp. In Type I crown morphology is normal, but root dentin organization loss leads to shorter roots. Mutations in the SSUH2, VPS4B and SMOC2 genes have been reported as responsible for this condition. Orthodontic treatment was conducted on an 11-year-old female patient presenting the disorder along with bilaterally impacted permanent maxillary canines, in close proximity to the roots of the lateral and central incisors. Treatment plan included lateral incisors extraction, surgical exposure and traction of the impacted canines. Light forces were applied from a custom-made trans-palatal arch. Comprehensive orthodontic treatment was performed using edgewise appliances. After 3 years and 2 months, group function occlusion was achieved. The canines underwent composite resin restorations. At one year post-retention, the dentition remained stable. Family-based genetic analysis did not reveal any mutations in the aforementioned genes pointing to further genetic heterogeneity of this disorder. As dental medicine becomes more sophisticated and personalized, the association between mutation type/function and orthodontic treatment response may provide useful therapeutic insights. The positive treatment response of the presented case could be attributed to a more “benign” mutation awaiting to be identified.
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Tian Q, Wang YY, Li Q, Chen D. Expressions of cytokeratin 14 and proliferating cell nuclear antigen in the Hertwig's epithelial root sheath of a Vps4b knockout mouse. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2021; 39:274-278. [PMID: 34041875 DOI: 10.7518/hxkq.2021.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
OBJECTIVES The effect of Vps4b gene mutation on the expressions of cytokeratin 14 (CK14) and proliferating cell nuclear antigen (PCNA) in the Hertwig's epithelial root sheath (HERS) is investigated. METHODS The bilateral mandibular tissues of mouse on postnatal days 5, 9, 11, 15, and 19 were removed. The mandibular first molar tissue sections were obtained after paraffin embedding. The CK14 and PCNA expressions in the epithelial root sheath of the normal mouse and Vps4b knockout mouse were compared through immunohistochemistry. RESULTS On postnatal day 5, the normal mouse began to form HERS and had a strong positive PCNA expression in the HERS cells; on postnatal day 9, the HERS structure was continuous, and PCNA was positive in the HERS cells; on postnatal day 11, a small portion of HERS began to break, and PCNA was weakly positive in the HERS cells; on postnatal day 15, HERS continued to fracture; PCNA was weakly and positively expressed in the HERS cells on the root surface; on postnatal day 19, the tooth root reached normal physiological length, and PCNA was positively expressed in the HERS cells of the terminal part. Similar to the normal mouse, the gene knockout mouse also formed a HERS structure on postnatal day 5. However, HERS began to break on postnatal day 9. On postnatal day 19, only a few fragments of HERS were found on the root surface, and the root development was immature. Moreover, the expression intensity of PCNA in the gene knockout mouse was decreased. CONCLUSIONS The Vps4b gene mutation may change the CK14 and PCNA expressions, leading to abnormal root development.
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Affiliation(s)
- Qing Tian
- Dept. of Stomatology, The First Affiliated Hospital of Zhengzhou University, Henan Provincial Stomatological Hospital, Zhengzhou 450052, China
| | - Ying-Ying Wang
- Dept. of Stomatology, Xuzhou Central Hospital, Xuzhou 221009, China
| | - Qiang Li
- Dept. of Stomatology, The First Affiliated Hospital of Zhengzhou University, Henan Provincial Stomatological Hospital, Zhengzhou 450052, China
| | - Dong Chen
- Dept. of Stomatology, The First Affiliated Hospital of Zhengzhou University, Henan Provincial Stomatological Hospital, Zhengzhou 450052, China
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Dentine disorders and adhesive treatments: A systematic review. J Dent 2021; 109:103654. [PMID: 33798638 DOI: 10.1016/j.jdent.2021.103654] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVES A better understanding of the microstructure and mechanical properties of enamel and dentine may enable practitioners to apply the current adhesive dentistry protocols to clinical cases involving dentine disorders (dentinogenesis imperfecta or dentine dysplasia). DATA/SOURCES Publications (up to June 2020) investigating the microstructure of dentine disorders were browsed in a systematic search using the PubMed/Medline, Embase and Cochrane Library electronic databases. Two authors independently selected the studies, extracted the data in accordance with the PRISMA statement, and assessed the risk of bias with the Critical Appraisal Checklist. A Mann-Whitney U test was computed to compare tissues damage related to the two dentine disorders of interest. STUDY SELECTION From an initial total of 642 studies, only 37 (n = 164 teeth) were included in the present analysis, among which 18 investigating enamel (n = 70 teeth), 15 the dentine-enamel junction (n = 62 teeth), and 35 dentine (n = 156 teeth). Dentine is damaged in cases of dentinogenesis imperfecta and osteogenesis imperfecta (p = 2.55E-21 and p = 3.99E-21, respectively). These studies highlight a reduction in mineral density, hardness, modulus of elasticity and abnormal microstructure in dentine disorders. The majority of studies report an altered dentine-enamel junction in dentinogenesis imperfecta and in osteogenesis imperfecta (p = 6.26E-09 and p = 0.001, respectively). Interestingly, enamel is also affected in cases of dentinogenesis imperfecta (p = 0.0013), unlike to osteogenesis imperfecta (p = 0.056). CONCLUSIONS Taking into account all these observations, only a few clinical principles may be favoured in the case of adhesive cementation: (i) to preserve the residual enamel to enhance bonding, (ii) to sandblast the tooth surfaces to increase roughness, (iii) to choose a universal adhesive and reinforce enamel and dentine by means of infiltrant resins. As these recommendations are mostly based on in vitro studies, future in vivo studies should be conducted to confirm these hypotheses.
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Phenotypic features of dentinogenesis imperfecta associated with osteogenesis imperfecta and COL1A2 mutations. Oral Surg Oral Med Oral Pathol Oral Radiol 2021; 131:694-701. [PMID: 33737018 DOI: 10.1016/j.oooo.2021.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/02/2020] [Accepted: 01/05/2021] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Dentinogenesis imperfecta (DI) requires dental treatment. This study investigated the characteristics of DI teeth associated with osteogenesis imperfecta (OI) and COL1A2 mutations. STUDY DESIGN Whole exome and Sanger sequencing were performed. Three primary teeth (called "OIDI teeth") obtained from 3 unrelated COL1A2 patients were investigated and compared with 9 control teeth from age-matched healthy individuals using colorimetry, micro-computed tomography, Knoop microhardness, energy dispersive X-ray spectroscopy, scanning electron microscopy, and histology. RESULTS All patients were identified with heterozygous glycine substitutions in COL1A2. The COL1A2 mutations, c.1531G>T and c.2027G>T, were de novo, whereas c.3106G>C was inherited. OIDI1, 2, and 3 teeth had a substantial decrease in dentin microhardness and lightness. OIDI2 enamel microhardness was significantly reduced, whereas OIDI1 and 3 had enamel microhardness comparable to that of control individuals. The OIDI1 pulp cavity was large; OIDI2 was narrow; and OIDI3 was obliterated. OIDI1 and 3 had significantly higher carbon levels than those in control individuals. Numerous ectopic calcified masses, sparse and obstructed dentinal tubules, dentin holes, and collagen disorientation were observed. CONCLUSIONS OIDI teeth had reduced lightness and variable pulp morphology. Weak dentin, mineral disproportion, and abnormal ultrastructure could contribute to the brittleness of OIDI teeth and adhesive restoration failure. Here, we expand the phenotypic spectrum of COL1A2 mutations and raise awareness among dentists seeing patients with OI.
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Kaur S, Roberts DD. Differential intolerance to loss of function and missense mutations in genes that encode human matricellular proteins. J Cell Commun Signal 2021; 15:93-105. [PMID: 33415696 PMCID: PMC7904989 DOI: 10.1007/s12079-020-00598-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/24/2020] [Indexed: 12/11/2022] Open
Abstract
Targeted gene disruption in mice has provided valuable insights into the functions of matricellular proteins. Apart from missense and loss of function mutations that have been associated with inherited diseases, however, their functions in humans remain unclear. The availability of deep exome sequencing data from over 140,000 individuals in the Genome Aggregation Database provided an opportunity to examine intolerance to loss of function and missense mutations in human matricellular genes. The probability of loss-of-function intolerance (pLI) differed widely within members of the thrombospondin, CYR61/CTGF/NOV (CCN), tenascin, small integrin-binding ligand N-linked glycoproteins (SIBLING), and secreted protein, acidic and rich in cysteine (SPARC) gene families. Notably, pLI values in humans had limited correlation with viability of the corresponding homozygous null mice. Among the thrombospondins, only THBS1 was highly loss-intolerant (pLI = 1). In contrast, Thbs1 is not essential for viability in mice. Several known thrombospondin-1 receptors were similarly loss-intolerant, although thrombospondin-1 is not the exclusive ligand for some of these receptors. The frequencies of missense mutations in THBS1 and the gene encoding its signaling receptor CD47 indicated conservation of some residues implicated in specific receptor binding. Deficits in missense mutations were also observed for other thrombospondin genes and for SPARC, SPOCK1, SPOCK2, TNR, and DSPP. The intolerance of THBS1 to loss of function in humans and elevated pLI values for THBS2, SPARC, SPOCK1, TNR, and CCN1 support important functions for these matricellular protein genes in humans, some of which may relate to functions in reproduction or responding to environmental stresses.
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Affiliation(s)
- Sukhbir Kaur
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, NIH, Building 10 Room 2S235, 10 Center Drive MSC1500, Bethesda, MD, 20892-1500, USA.
| | - David D Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, NIH, Building 10 Room 2S235, 10 Center Drive MSC1500, Bethesda, MD, 20892-1500, USA.
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Messineo D, Luzzi V, Pepe F, Celli L, Turchetti A, Zambrano A, Celli M, Polimeni A, Ierardo G. New 3D Cone Beam CT Imaging Parameters to Assist the Dentist in Treating Patients with Osteogenesis Imperfecta. Healthcare (Basel) 2020; 8:healthcare8040546. [PMID: 33321783 PMCID: PMC7764058 DOI: 10.3390/healthcare8040546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/08/2020] [Accepted: 12/09/2020] [Indexed: 12/17/2022] Open
Abstract
(1) Background: The aim of the work is to identify some imaging parameters in osteogenesis imperfecta to assist the dentist in the diagnosis, planning, and orthodontic treatment of Osteogenesis Imperfecta (OI) using 3D cone beam Computed Tomography (CBCT) and the Double Energy X-ray Absorptiometry (DEXA) technique. (2) Methods: 14 patients (9 males and 5 females; aged mean ± SD 15 ± 1.5) with a clinical-radiological diagnosis of OI were analyzed and divided into mild and moderate to severe forms. The patients' samples were compared with a control group of 14 patients (8 males and 6 females; aged mean ± SD 15 ± 1.7), free from osteoporotic pathologies. (3) Results: The statistical analysis allowed us to collect four datasets: in the first dataset (C1 sick population vs. C1 healthy population), the t-test showed a p-value < 0.0001; in the second dataset (C2 sick population vs. C2 healthy population), the t-test showed a p-value < 0.0001; in the third dataset (parameter X of the sick population vs. parameter X of the healthy population), the t-test showed a p-value < 0.0001; in the fourth dataset the bone mineralometry (BMD) value detected by the DEXA technique compared to the C2 value of the OI affected population only) the Welch-Satterthwaite test showed a p-value < 0.0001. (4) Conclusions: The research has produced specific imaging parameters that assist the dentist in making diagnostic decisions in OI patients. This study shows that patients with OI have a characteristic chin-bearing symphysis, thinned, and narrowed towards the center, configuring it with a constant "hourglass" appearance, not reported so far in the literature by any author.
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Affiliation(s)
- Daniela Messineo
- Department of Radiological, Oncological and Anatomo-Pathological Sciences, Sapienza University of Rome, 00161 Rome, Italy
- Correspondence: ; Tel.: +39-06-49976721
| | - Valeria Luzzi
- Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, 00161 Rome, Italy; (V.L.); (F.P.); (A.P.); (G.I.)
| | - Francesca Pepe
- Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, 00161 Rome, Italy; (V.L.); (F.P.); (A.P.); (G.I.)
| | - Luca Celli
- Rare Bone Metabolism Center, Pediatric Department, Sapienza University of Rome, 00161 Rome, Italy; (L.C.); (A.T.); (A.Z.); (M.C.)
| | - Arianna Turchetti
- Rare Bone Metabolism Center, Pediatric Department, Sapienza University of Rome, 00161 Rome, Italy; (L.C.); (A.T.); (A.Z.); (M.C.)
| | - Anna Zambrano
- Rare Bone Metabolism Center, Pediatric Department, Sapienza University of Rome, 00161 Rome, Italy; (L.C.); (A.T.); (A.Z.); (M.C.)
| | - Mauro Celli
- Rare Bone Metabolism Center, Pediatric Department, Sapienza University of Rome, 00161 Rome, Italy; (L.C.); (A.T.); (A.Z.); (M.C.)
| | - Antonella Polimeni
- Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, 00161 Rome, Italy; (V.L.); (F.P.); (A.P.); (G.I.)
| | - Gaetano Ierardo
- Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, 00161 Rome, Italy; (V.L.); (F.P.); (A.P.); (G.I.)
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Shi C, Ma N, Zhang W, Ye J, Shi H, Xiang D, Wu C, Song L, Zhang N, Liu Q. Haploinsufficiency of Dspp Gene Causes Dentin Dysplasia Type II in Mice. Front Physiol 2020; 11:593626. [PMID: 33240110 PMCID: PMC7680915 DOI: 10.3389/fphys.2020.593626] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 10/20/2020] [Indexed: 01/16/2023] Open
Abstract
Dentin dysplasia (DD) and dentinogenesis imperfecta (DGI) patients have abnormal structure, morphology, and function of dentin. DD-II, DGI-II, and DGI-III are caused by heterozygous mutations in the dentin sialophosphoprotein (DSPP) gene in humans. Evidences have shown that loss of function of DSPP in Dspp knockout mice leads to phenotypes similar to DGI-III, and that the abnormal dentinogenesis is associated with decreased levels of DSPP, indicating that DSPP haploinsufficiency may play a role in dentinogenesis. Thus, to testify the haploinsufficiency of Dspp, we used a Dspp heterozygous mouse model to observe the phenotypes in the teeth and the surrounding tissues. We found that Dspp heterozygous mice displayed dentin phenotypes similar to DD-II at the ages of 12 and 18 months, which was characterized by excessive attrition of the enamel at the occlusal surfaces, thicker floor dentin of the pulp chamber, decreased pulp volume, and compromised mineralization of the dentin. In addition, the periodontium was also affected, exhibiting apical proliferation of the junctional epithelium, decreased height and width of the alveolar bone, and infiltration of the inflammatory cells, leading to the destruction of the periodontium. Both the dental and periodontal phenotypes were age-dependent, which were more severe at 18 months old than those at 12 months old. Our report is the first to claim the haploinsufficiency of Dspp gene and a DD-II mouse model, which can be further used to study the molecular mechanisms of DD-II.
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Affiliation(s)
- Ce Shi
- Department of Oral Pathology, School and Hospital of Stomatology, Jilin University, Changchun, China.,Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, School and Hospital of Jilin University, Changchun, China
| | - Ning Ma
- Department of Rheumatology, First Hospital of Jilin University, Changchun, China
| | - Wei Zhang
- Department of Oral and Maxillofacial Surgery, School and Hospital of Jilin University, Changchun, China
| | - Jiapeng Ye
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, School and Hospital of Jilin University, Changchun, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Jilin University, Changchun, China
| | - Haibo Shi
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, School and Hospital of Jilin University, Changchun, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Jilin University, Changchun, China
| | - Danwei Xiang
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, School and Hospital of Jilin University, Changchun, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Jilin University, Changchun, China
| | - Chunyue Wu
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, School and Hospital of Jilin University, Changchun, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Jilin University, Changchun, China
| | - Lina Song
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, School and Hospital of Jilin University, Changchun, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Jilin University, Changchun, China
| | - Ning Zhang
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, School and Hospital of Jilin University, Changchun, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Jilin University, Changchun, China
| | - Qilin Liu
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, School and Hospital of Jilin University, Changchun, China.,Department of Oral and Maxillofacial Surgery, School and Hospital of Jilin University, Changchun, China
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Turkkahraman H, Galindo F, Tulu US, Helms JA. A novel hypothesis based on clinical, radiological, and histological data to explain the dentinogenesis imperfecta type II phenotype. Connect Tissue Res 2020; 61:526-536. [PMID: 31284784 DOI: 10.1080/03008207.2019.1631296] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Purpose/Aim: The aim of this study was to explore whether dentinogenesis imperfecta (DGI)-related aberrations are detectable in odontogenic tissues. Materials and Methods: Morphological and histological analyses were carried out on 3 teeth (two maxillary 1st molars, one maxillary central incisor) extracted from a patient with DGI Type II. A maxillary 2nd molar teeth extracted from a healthy patient was used as control. A micro-computed tomographic (μCT) data-acquisition system was used to scan and reconstruct samples. Pentachrome and picrosirius red histologic stains were used to analyze odontogenic tissues and their collagenous matrices. Results: Our findings corroborate DGI effects on molar and incisor root elongation, and the hypo-mineralized state of DGI dentin. In addition to these findings, we discovered changes to the DGI pulp cavity: Reactionary dentin formation, which we theorize is exacerbated by the early loss of enamel, nearly obliterated an acellular but still-vascularized DGI pulp cavity. We also discovered an accumulation of lamellated cellular cementum at the root apices, which we hypothesize compensates for the severe and rapid attrition of the DGI tooth. Conclusions: Based on imaging and histological data, we propose a novel hypothesis to explain the complex dental phenotypes observed in patients with DGI Type II.
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Affiliation(s)
- Hakan Turkkahraman
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine , Stanford, CA, USA.,Department of Orthodontics and Oral Facial Genetics, School of Dentistry, Indiana University , Indianapolis, IN, USA
| | - Fernando Galindo
- School of Dentistry, Javeriana University , Bogotá, Colombia.,Fundación Santa Fé de Bogotá Hospital , Bogotá, Colombia
| | - Ustun Serdar Tulu
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine , Stanford, CA, USA
| | - Jill A Helms
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine , Stanford, CA, USA
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Haba D, Decolli Y, Marciuc E, Sîrghe AE. Teeth Impaction and Structural Teeth Anomalies. Semin Musculoskelet Radiol 2020; 24:523-534. [PMID: 33036040 DOI: 10.1055/s-0040-1709210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Dentists and oral and maxillofacial radiologists have used periapical, occlusal, panoramic, and cephalometric radiographs for many years for diagnosing dental anomalies, especially before orthodontic or surgical treatment. Cone beam computed tomography was developed in recent years especially for the dental and maxillofacial region. Thus it has become the imaging modality of choice for many clinical situations, such as the assessment of dental impaction and structural teeth anomalies or other associated diseases and disorders (e.g., Gardner's syndrome, cleidocranial dysplasia). This article reviews different aspects of dental impaction and its possible effects on adjacent structures such as external root resorption, marginal bone loss, as well as describing structural dental anomalies. It provides a systematic analysis of their characteristic features and imaging findings for general radiologists to achieve a precise diagnosis and an optimal interpretation.
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Affiliation(s)
- Danisia Haba
- Department of Oral and Maxillofacial Surgery, "Grigore T. Popa" University of Medicine and Pharmacy Iaşi, Iaşi, Romania
| | - Yllka Decolli
- Department of Odontology, Parodontology and Fixed Prothesis, "Grigore T. Popa" University of Medicine and Pharmacy Iaşi, Iaşi, Romania
| | - Emilia Marciuc
- Department of Oral and Maxillofacial Surgery, "Grigore T. Popa" University of Medicine and Pharmacy Iaşi, Iaşi, Romania
| | - Ana Elena Sîrghe
- Department of Oral and Maxillofacial Surgery, "Grigore T. Popa" University of Medicine and Pharmacy Iaşi, Iaşi, Romania
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Full Mouth Rehabilitation of Two Siblings with Dentinogenesis Imperfecta Type II Using Different Treatment Modalities. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17197029. [PMID: 32992978 PMCID: PMC7579056 DOI: 10.3390/ijerph17197029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/13/2020] [Accepted: 09/21/2020] [Indexed: 11/23/2022]
Abstract
Background: Dentinogenesis imperfecta (DGI) is a complex anomaly, not only by its structure but by treatment approach. The treatment protocol depends on the severity, behavior, and the age of the patient. Case Description: This paper presents two siblings’ cases of DGI type II (DGI-II) with different treatment based on the patient’s clinical severity, behavior, and age (mixed versus primary dentition). The first case involves a patient in the primary dentition with severe attrition leading to a reduction in the vertical dimension of occlusion (VDO) treated by the fabrication of complete overlay dentures. The second case involves a patient in the early mixed dentition treated with restorations and extractions. Conclusion: Full mouth rehabilitation in the two patients dramatically improves function, aesthetics, and proved to be a significant psychological boost to the patient’s well-being. Practical Implications: Early diagnosis and a multidisciplinary approach for patients with DGI to preserve the remaining teeth and rehabilitation for their function and aesthetics are essential for obtaining a favorable prognosis.
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Sarapultseva M, Leleko A, Sarapultsev A. Case report: Rehabilitation of a child with dentinogenesis imperfecta with CAD/CAM approach: Three‐year follow‐up. SPECIAL CARE IN DENTISTRY 2020; 40:511-518. [DOI: 10.1111/scd.12500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/08/2020] [Accepted: 07/10/2020] [Indexed: 11/29/2022]
Affiliation(s)
- Maria Sarapultseva
- Department of Pediatric Dentistry Medical Firm Vital EVV Ekaterinburg Russia
- Institute of Immunology and Physiology (IIP) Ural Division of Russian Academy of Sciences Ekaterinburg Russia
| | - Alina Leleko
- Department of Pediatric Dentistry Medical Firm Vital EVV Ekaterinburg Russia
- Institute of Immunology and Physiology (IIP) Ural Division of Russian Academy of Sciences Ekaterinburg Russia
| | - Alexey Sarapultsev
- Institute of Immunology and Physiology (IIP) Ural Division of Russian Academy of Sciences Ekaterinburg Russia
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VPS4B mutation impairs the osteogenic differentiation of dental follicle cells derived from a patient with dentin dysplasia type I. Int J Oral Sci 2020; 12:22. [PMID: 32737282 PMCID: PMC7395790 DOI: 10.1038/s41368-020-00088-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 06/02/2020] [Accepted: 06/04/2020] [Indexed: 01/05/2023] Open
Abstract
A splicing mutation in VPS4B can cause dentin dysplasia type I (DD-I), a hereditary autosomal-dominant disorder characterized by rootless teeth, the etiology of which is genetically heterogeneous. In our study, dental follicle cells (DFCs) were isolated and cultured from a patient with DD-I and compared with those from an age-matched, healthy control. In a previous study, this DD-I patient was confirmed to have a loss-of-function splicing mutation in VPS4B (IVS7 + 46C > G). The results from this study showed that the isolated DFCs were vimentin-positive and CK14-negative, indicating that the isolated cells were derived from the mesenchyme. DFCs harboring the VPS4B mutation had a significantly higher proliferation rate from day 3 to day 8 than control DFCs, indicating that VPS4B is involved in cell proliferation. The cells were then replenished with osteogenic medium to investigate how the VPS4B mutation affected osteogenic differentiation. Induction of osteogenesis, detected by alizarin red and alkaline phosphatase staining in vitro, was decreased in the DFCs from the DD-I patient compared to the control DFCs. Furthermore, we also found that the VPS4B mutation in the DD-I patient downregulated the expression of osteoblast-related genes, such as ALP, BSP, OCN, RUNX2, and their encoded proteins. These outcomes confirmed that the DD-I-associated VPS4B mutation could decrease the capacity of DFCs to differentiate during the mineralization process and may also impair physiological root formation and bone remodeling. This might provide valuable insights and implications for exploring the pathological mechanisms underlying DD-I root development.
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Physicochemical properties of dentinogenesis imperfecta with a known DSPP mutation. Arch Oral Biol 2020; 117:104815. [PMID: 32585446 DOI: 10.1016/j.archoralbio.2020.104815] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/25/2020] [Accepted: 06/07/2020] [Indexed: 01/24/2023]
Abstract
AIM To investigate the chemical and mechanical properties of teeth affected by a 1-bp deletion (c.2688delT) in the DSPP gene. METHODS AND MATERIALS Maxillary first premolars were extracted from the affected individual at age 9 years due to the orthodontic reason for crowding. A sample was imbedded in epoxy resin and sectioned buccolingually, after micro-computerized tomography (μCT) images were taken. Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometry (EDS) and Vickers microhardness testing were also performed. RESULTS μCT reconstruction and analysis showed an irregularly obliterated pulp chamber and an extremely small pulpal volume in the DGI-II sample. The mineral density and microhardness scores were smaller in the dentin of the DGI-II sample compared to the wild-type. Mg content was lower in the dentin of the DGI-II sample compared to the wild-type. CONCLUSION This study shows that dentin affected by a 1-bp deletion in DSPP has a reduced mineral density, diminished microhardness and reduced Mg content.
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de La Dure-Molla M, Fournier BP, Manzanares MC, Acevedo AC, Hennekam RC, Friedlander L, Boy-Lefèvre ML, Kerner S, Toupenay S, Garrec P, Vi-Fane B, Felizardo R, Berteretche MV, Jordan L, Ferré F, Clauss F, Jung S, de Chalendar M, Troester S, Kawczynski M, Chaloyard J, Manière MC, Berdal A, Bloch-Zupan A. Elements of morphology: Standard terminology for the teeth and classifying genetic dental disorders. Am J Med Genet A 2019; 179:1913-1981. [PMID: 31468724 DOI: 10.1002/ajmg.a.61316] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 05/24/2019] [Accepted: 07/17/2019] [Indexed: 12/14/2022]
Abstract
Dental anomalies occur frequently in a number of genetic disorders and act as major signs in diagnosing these disorders. We present definitions of the most common dental signs and propose a classification usable as a diagnostic tool by dentists, clinical geneticists, and other health care providers. The definitions are part of the series Elements of Morphology and have been established after careful discussions within an international group of experienced dentists and geneticists. The classification system was elaborated in the French collaborative network "TÊTECOU" and the affiliated O-Rares reference/competence centers. The classification includes isolated and syndromic disorders with oral and dental anomalies, to which causative genes and main extraoral signs and symptoms are added. A systematic literature analysis yielded 408 entities of which a causal gene has been identified in 79%. We classified dental disorders in eight groups: dental agenesis, supernumerary teeth, dental size and/or shape, enamel, dentin, dental eruption, periodontal and gingival, and tumor-like anomalies. We aim the classification to act as a shared reference for clinical and epidemiological studies. We welcome critical evaluations of the definitions and classification and will regularly update the classification for newly recognized conditions.
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Affiliation(s)
- Muriel de La Dure-Molla
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,INSERM UMR_S1163 Bases moléculaires et physiopathologiques des ostéochondrodysplasies, Institut Imagine, Necker, Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | - Benjamin Philippe Fournier
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France.,Laboratoire de Physiopathologie Orale Moléculaire INSERM UMR S1138, Centre de Recherche des Cordeliers, Universités Paris-Diderot et Paris-Descartes, Paris, France
| | - Maria Cristina Manzanares
- Unitat d'Anatomia i Embriologia Humana, Departament de Patologia i Terapèutica Experimental, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Barcelona, Spain
| | - Ana Carolina Acevedo
- ral Care Center for Inherited Diseases, University Hospital of Brasilia, University of Brasilia, Brasilia, Brazil.,Department of Dentistry, Health Sciences School, University of Brasilia, Brasilia, Brazil
| | - Raoul C Hennekam
- Department of Pediatrics, Amsterdam UMC location AMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Lisa Friedlander
- Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France.,INSERM UMR_S1123, ECEVE, Epidémiologie clinique, évaluation économique des populations vulnérables, Paris, France
| | - Marie-Laure Boy-Lefèvre
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | - Stephane Kerner
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | - Steve Toupenay
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | - Pascal Garrec
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | - Brigite Vi-Fane
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | - Rufino Felizardo
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | - Marie-Violaine Berteretche
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | - Laurence Jordan
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | - François Ferré
- Laboratoire de Physiopathologie Orale Moléculaire INSERM UMR S1138, Centre de Recherche des Cordeliers, Universités Paris-Diderot et Paris-Descartes, Paris, France
| | - François Clauss
- Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France.,Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France.,Pôle de Médecine et Chirurgie Bucco-Dentaires, Centre de Référence des Maladies Rares Orales et Dentaires, CRMR O-Rares, ERN CRANIO, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Sophie Jung
- Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France.,Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France.,Pôle de Médecine et Chirurgie Bucco-Dentaires, Centre de Référence des Maladies Rares Orales et Dentaires, CRMR O-Rares, ERN CRANIO, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Myriam de Chalendar
- Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | - Sebastien Troester
- Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France.,Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France.,Pôle de Médecine et Chirurgie Bucco-Dentaires, Centre de Référence des Maladies Rares Orales et Dentaires, CRMR O-Rares, ERN CRANIO, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Marzena Kawczynski
- Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France.,Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France.,Pôle de Médecine et Chirurgie Bucco-Dentaires, Centre de Référence des Maladies Rares Orales et Dentaires, CRMR O-Rares, ERN CRANIO, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Jessica Chaloyard
- Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France
| | | | - Marie Cécile Manière
- Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France.,Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France.,Pôle de Médecine et Chirurgie Bucco-Dentaires, Centre de Référence des Maladies Rares Orales et Dentaires, CRMR O-Rares, ERN CRANIO, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Ariane Berdal
- Centre de Référence des Maladies rares Orales et Dentaires, Hôpital Rothschild, AP-HP, Faculté Odontologie Garancière, Université de Paris, France.,Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France.,Laboratoire de Physiopathologie Orale Moléculaire INSERM UMR S1138, Centre de Recherche des Cordeliers, Universités Paris-Diderot et Paris-Descartes, Paris, France
| | - Agnès Bloch-Zupan
- Filière de santé Maladies Rares TETECOU: Malformations rares de la tête, du cou et des dents, Hôpital Necker-Enfants Malades, Paris, France.,Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France.,Pôle de Médecine et Chirurgie Bucco-Dentaires, Centre de Référence des Maladies Rares Orales et Dentaires, CRMR O-Rares, ERN CRANIO, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.,Institut de Génétique et de Biologie Moléculaire and Cellulaire, Centre Européen de Recherche en Biologie et en Médecine, Université de Strasbourg, CNRS UMR7104, INSERM U1258, Illkirch, France.,Institut d'Etudes Avancées, Université de Strasbourg, USIAS, Strasbourg, France
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Rashidian A, Zahraei SH, Hashemi SS. Developmental Disturbance of Dentin with Probable Diagnosis of Dentin Dysplasia Type 1d: A rare case report. JOURNAL OF RESEARCH IN DENTAL AND MAXILLOFACIAL SCIENCES 2019. [DOI: 10.29252/jrdms.4.2.37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Kierdorf U, Olsen MT, Kahle P, Ludolphy C, Kierdorf H. Dental pulp exposure, periapical inflammation and suppurative osteomyelitis of the jaws in juvenile Baltic grey seals (Halichoerus grypus grypus) from the late 19th century. PLoS One 2019; 14:e0215401. [PMID: 30978237 PMCID: PMC6461278 DOI: 10.1371/journal.pone.0215401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 04/01/2019] [Indexed: 11/19/2022] Open
Abstract
The systematic analysis of museum collections can provide important insights into the dental and skeletal pathology of wild mammals. Here we present a previously unreported type of dental defect and related skull pathology in five juvenile Baltic grey seals that had been collected in the course of a seal culling program along the Danish coast in 1889 and 1890. All five skulls exhibited openings into the pulp cavities at the crown tips of all (four animals) or two (one animal) canines as well as several incisors and (in one animal) also some anterior premolars. The affected teeth showed wide pulp cavities and thin dentin. Pulp exposure had caused infection, inflammation, and finally necrosis of the pulp. As was evidenced by the extensive radiolucency around the roots of the affected teeth, the inflammation had extended from the pulp into the periapical space, leading to apical periodontitis with extensive bone resorption. Further spreading of the inflammation into the surrounding bone regions had then caused suppurative osteomyelitis of the jaws. The postcanine teeth of the pathological individuals typically had dentin of normal thickness and, except for one specimen, did not exhibit pulp exposure. The condition may have been caused by a late onset of secondary and tertiary dentin formation that led to pulp exposure in anterior teeth exposed to intense wear. Future investigations could address a possible genetic causation of the condition in the studied grey seals.
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Affiliation(s)
- Uwe Kierdorf
- Department of Biology, University of Hildesheim, Hildesheim, Germany
- * E-mail:
| | - Morten T. Olsen
- Natural History Museum of Denmark, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Patricia Kahle
- Department of Biology, University of Hildesheim, Hildesheim, Germany
| | | | - Horst Kierdorf
- Department of Biology, University of Hildesheim, Hildesheim, Germany
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Chetty M, Roberts T, Shaik S, Beighton P. Dentinogenesis imperfecta in Osteogenesis imperfecta type XI in South Africa: a genotype-phenotype correlation. BDJ Open 2019; 5:4. [PMID: 30993005 PMCID: PMC6459848 DOI: 10.1038/s41405-019-0014-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 11/05/2018] [Accepted: 11/26/2018] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The maxillofacial and dental manifestations of Osteogenesis imperfecta (OI) have significant implications in terms of management. Although the occurrence of abnormal dentine in some forms of OI is well documented, there is scant information on the association of abnormal dentine in the Black African persons with phenotypic OI III and genotypic OI XI in South Africa. METHODS This was a cross-sectional analytic study. A series of 64 Black South African individuals with a confirmed phenotypic diagnosis of OI III, ages ranging from 3 months to 29 years, were assessed clinically, radiographically, and at a molecular level. RESULTS A total number of 64 saliva samples were analyzed and 3 DNA variations were identified in exon 5 of the FKBP10 gene. The homozygous mutation, c.[831dupC]; [831dupC], was identified in 23 affected persons who had no clinically obvious features of DI in their primary and secondary teeth. Radiologically, mild features of DI were evident in 10 persons in whom radiographic images were obtained and were given a Clinical-radiological score of 2. A compound heterozygous mutation, c. [831delC]; [831dupC], was identified in three siblings. An intraoral examination of these affected persons revealed no clinically apparent features of DI in their primary and secondary teeth. Due to the lack of radiological facilities, the presence or absence of DI could not be confirmed or negated. A second compound heterozygous mutation, c.[831dupC]; [1400-4C>G], was identified in a female of 29 years belonging to the Xhosa linguistic group. Her teeth appeared clinically normal but it was not possible to obtain radiographs. In 37 affected individuals, no disease-causing mutations were identified. CONCLUSION Black African individuals in SA with the homozygous mutation in the FKBP10 gene have clinically unaffected teeth yet exhibited radiographic features of DI to varying degrees. This characterization is suggestive of a relationship between the genetic abnormality and the clinical manifestations of DI. The authors suggest that this diagnosis must include teeth that are clinically and/or radiologically aberrant, and should not exclude the presence of other, milder, dentinal aberrations associated with OI. There was no correlation between severity of OI and DI in this cohort of individuals.
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Affiliation(s)
- M. Chetty
- Faculty of Dentistry, University of the Western Cape, Bellville, Cape Town, South Africa
- University of the Western Cape/University of Cape Town Collaborative Dental Genetics Clinic, Red Cross Children’s Hospital, Cape Town, South Africa
| | - T. Roberts
- Faculty of Dentistry, University of the Western Cape, Bellville, Cape Town, South Africa
- University of the Western Cape/University of Cape Town Collaborative Dental Genetics Clinic, Red Cross Children’s Hospital, Cape Town, South Africa
| | - S. Shaik
- Faculty of Dentistry, University of the Western Cape, Bellville, Cape Town, South Africa
- University of the Western Cape/University of Cape Town Collaborative Dental Genetics Clinic, Red Cross Children’s Hospital, Cape Town, South Africa
| | - P. Beighton
- University of the Western Cape/University of Cape Town Collaborative Dental Genetics Clinic, Red Cross Children’s Hospital, Cape Town, South Africa
- Faculty of Health Sciences, Division of Human Genetics, University of Cape Town, Rondebosch, South Africa
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Huang X, Wang F, Zhao C, Yang S, Cheng Q, Tang Y, Zhang F, Zhang Y, Luo W, Wang C, Zhou P, Kim S, Zuo G, Hu N, Li R, He TC, Zhang H. Dentinogenesis and Tooth-Alveolar Bone Complex Defects in BMP9/GDF2 Knockout Mice. Stem Cells Dev 2019; 28:683-694. [PMID: 30816068 PMCID: PMC6534167 DOI: 10.1089/scd.2018.0230] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Tooth development is regulated by sequential and reciprocal epithelium-mesenchymal interactions and their related molecular signaling pathways, such as bone morphogenetic proteins (BMPs). Among the 14 types of BMPs, BMP9 (also known as growth differentiation factor 2) is one of the most potent BMPs to induce osteogenic differentiation of mesenchymal stem cells. The purpose of this study was to examine potential roles of BMP9 signaling in tooth development. First, we detected the expression pattern of BMP9 in tooth germ during postnatal tooth development, and we found that BMP9 was widely expressed in odontoblasts, ameloblasts, dental pulp cells, and osteoblasts in alveolar bones. Then, we established a BMP9-KO mouse model. Gross morphological examination revealed that the tooth cusps of BMP9-KO mice were significantly abraded with shorter roots. Micro-computed tomography and three-dimensional reconstruction analysis indicated that the first molars of the BMP9-KO mice exhibited a reduced thickness dentin, enlarged pulp canals, and shortened roots, resembling the phenotypes of the common hereditary dental disease dentinogenesis imperfecta. Further, the alveolar bone of the BMP9-KO mutants was found to be shorter and had a decreased mineral density and trabecular thickness and bone volume fraction compared with that of the wild-type control. Mechanistically, we demonstrated that both dentin sialophosphoprotein and dentin matrix protein 1 were induced in dental stem cells by BMP9, whereas their expression was reduced when BMP9 was silenced. Further studies are required to determine whether loss of or decreased BMP9 expression is clinically associated with dentinogenesis imperfecta. Collectively, our results strongly suggest that BMP9 may play an important role in regulating dentinogenesis and tooth development. Further research is recommended into the therapeutic uses of BMP9 to regenerate traumatized and diseased tissues and for the bioengineering of replacement teeth.
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Affiliation(s)
- Xia Huang
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China.,2 Department of Pediatric Dentistry, The Affiliated Stomatology Hospital, Chongqing Medical University, Chongqing, China
| | - Feilong Wang
- 2 Department of Pediatric Dentistry, The Affiliated Stomatology Hospital, Chongqing Medical University, Chongqing, China.,3 Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Chen Zhao
- 4 Department of Orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Sheng Yang
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China.,5 Department of Prosthodontics, The Affiliated Stomatology Hospital, Chongqing Medical University, Chongqing, China
| | - Qianyu Cheng
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China.,2 Department of Pediatric Dentistry, The Affiliated Stomatology Hospital, Chongqing Medical University, Chongqing, China
| | - Yingying Tang
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China.,2 Department of Pediatric Dentistry, The Affiliated Stomatology Hospital, Chongqing Medical University, Chongqing, China
| | - Fugui Zhang
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China
| | - Yan Zhang
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China
| | - Wenping Luo
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China
| | - Chao Wang
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China
| | - Pengfei Zhou
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China
| | - Stephanie Kim
- 6 Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, Illinois
| | - Guowei Zuo
- 7 Ministry of Education Key Laboratory of Diagnostic Medicine and School of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - Ning Hu
- 4 Department of Orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Ruidong Li
- 8 Department of Orthopaedic Surgery, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Tong-Chuan He
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China.,6 Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, Illinois
| | - Hongmei Zhang
- 1 Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China.,2 Department of Pediatric Dentistry, The Affiliated Stomatology Hospital, Chongqing Medical University, Chongqing, China
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Abstract
This chapter describes methods related to the diagnosis of genetic dental diseases. Based on the present knowledge, clinical phenotyping and next-generation sequencing techniques are discussed. Methods necessary for Sanger sequencing, multiplex ligation-dependent probe amplification, and epigenetic modification methods are detailed. In addition, protocols for cell culture establishment and characterization from patients with inherited dental anomalies are described.
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Berès F, Lignon G, Rouzière S, Mauprivez C, Simon S, Berdal A, Dessombz A. Physicochemical analysis of human pulpal mineralization secondary to FAM20A mutations. Connect Tissue Res 2018; 59:46-51. [PMID: 29745815 DOI: 10.1080/03008207.2018.1435644] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Fleur Berès
- a Laboratoire de Physiopathologie Orale Moléculaire, Centre de Recherche des Cordeliers, UMRS 1138 Institut National de la Santé et de la Recherche Médicale , Universités Paris-Descartes , Pierre-et-Marie-Curie, Paris-Diderot, Paris , France.,b UFR d'Odontologie , Université Paris-Descartes , Paris , France ; Service d'Odontologie, Hôpital Bretonneau, HUPNVS, AP-HP, Paris, France
| | - Guilhem Lignon
- a Laboratoire de Physiopathologie Orale Moléculaire, Centre de Recherche des Cordeliers, UMRS 1138 Institut National de la Santé et de la Recherche Médicale , Universités Paris-Descartes , Pierre-et-Marie-Curie, Paris-Diderot, Paris , France
| | - Stéphan Rouzière
- c Laboratoire de Physique des Solides, Centre National de la Recherche Scientifique , Université Paris-Sud, Université Paris-Saclay Orsay Cedex , France
| | - Cédric Mauprivez
- d Faculté de chirurgie dentaire , Université de Reims , Champagne Ardenne France
| | - Stéphane Simon
- a Laboratoire de Physiopathologie Orale Moléculaire, Centre de Recherche des Cordeliers, UMRS 1138 Institut National de la Santé et de la Recherche Médicale , Universités Paris-Descartes , Pierre-et-Marie-Curie, Paris-Diderot, Paris , France.,e UFR d'Odontologie-Garancière , Université Paris-Diderot, Paris, France; Groupe Hospitalier Pitié Salpêtrière-Charles Foix , Paris , France
| | - Ariane Berdal
- a Laboratoire de Physiopathologie Orale Moléculaire, Centre de Recherche des Cordeliers, UMRS 1138 Institut National de la Santé et de la Recherche Médicale , Universités Paris-Descartes , Pierre-et-Marie-Curie, Paris-Diderot, Paris , France.,f Centre de Référence Maladies Rares Orales et Dentaires ORares - Hôpital Rothschild , HUEP , AP-HP Paris , France
| | - Arnaud Dessombz
- a Laboratoire de Physiopathologie Orale Moléculaire, Centre de Recherche des Cordeliers, UMRS 1138 Institut National de la Santé et de la Recherche Médicale , Universités Paris-Descartes , Pierre-et-Marie-Curie, Paris-Diderot, Paris , France
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