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Vervack V, Johansson C, Coster PD, Fokkinga W, Papia E, Vandeweghe S. The fracture strength and the failure mode of lithium disilicate or resin nano ceramics as a crown, overlay, or endocrown restoration on endodontically treated teeth. J ESTHET RESTOR DENT 2024; 36:796-803. [PMID: 38152852 DOI: 10.1111/jerd.13187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 12/05/2023] [Accepted: 12/06/2023] [Indexed: 12/29/2023]
Abstract
INTRODUCTION Different materials and restorative concepts have been proposed over the years to restore endodontically treated teeth (ETT). Monolithic ceramic and composite restoration can be lute to the tooh, without the use of a post. However, little is known how the material stiffness and presence of a composite core will affect the survival and failure mode. The objective of this in-vitro study was to evaluate the fracture strength and failure mode of endodontically treated molars, restored with ceramic or hybrid composite monolithic restoration, in the presence of absence of a composite core. MATERIALS AND METHODS Sixty depulped molars were restored with a lithium-disilicate (e.max CAD) or hybrid composite (Cerasmart) restoration. Both materials were used in a monolithic approach, but with 3 different designs: (a) monolithic endocrown, (b) crown with a separate composite core, and (c) overlay without core buildup or pulpal extension. Ten sound teeth were used as control group. All groups were thermocycled (10,000 cycles), subsequently loaded in a chewing simulator (100,000 cycles) and finally loaded until fracture. RESULTS Peak fracture loads and failure modes were registered. No significant differences were seen between the groups in terms of fracture load. Failure modes were statistically significantly different among groups with significant correlation between restoration type and material. (p < 0.001 and p = 0.033, respectively). No group presented significantly higher fracture resistance. Although ceramic crowns and overlays presented the highest repairability, all restored ETT were within the range of the intact tooth' fracture strength. CONCLUSION No restoration presented significant different fracture loads. However, the type of restoration and material choice were correlated to the fracture mode.
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Affiliation(s)
- Valentin Vervack
- Department of Oral Health Sciences, Reconstructive Dentistry, Faculty of medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Camilla Johansson
- Faculty of Odontology, Material Science and Technology, Dental Technology, Malmö University, Malmö, Sweden
| | - Peter De Coster
- Department of Oral Health Sciences, Reconstructive Dentistry, Faculty of medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Wietske Fokkinga
- Department of Dentistry, Radboud Institute for Health Sciences, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Evaggelia Papia
- Faculty of Odontology, Material Science and Technology, Dental Technology, Malmö University, Malmö, Sweden
| | - Stefan Vandeweghe
- Department of Oral Health Sciences, Reconstructive Dentistry, Faculty of medicine and Health Sciences, Ghent University, Ghent, Belgium
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Banon R, Vandenbulcke J, Van Acker J, Martens L, De Coster P, Rajasekharan S. Two-year clinical and radiographic evaluation of ACTIVA BioACTIVE versus Compomer (Dyract® eXtra) in the restoration of class-2 cavities of primary molars: a non-inferior split-mouth randomised clinical trial. BMC Oral Health 2024; 24:437. [PMID: 38600533 PMCID: PMC11005273 DOI: 10.1186/s12903-024-04132-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 03/11/2024] [Indexed: 04/12/2024] Open
Abstract
OBJECTIVES The trial aimed to compare the clinical performance and radiographic success of ACTIVA BioACTIVE versus Compomer in restoring class-II cavities of primary molars. MATERIALS AND METHODS A non-inferior split-mouth design was considered. A pre-calculated sample size of 96 molars (48 per group) with class-2 cavities of twenty-one children whose ages ranged from 5 to 10 years were randomly included in the trial. Pre-operative Plaque Index (PI), DMFT/dmft scores and the time required to fill the cavity were recorded. Over 24 months, the teeth were clinically evaluated every six months and radiographically every 12 months by two calibrated and blinded evaluators using the United States public health service (USPHS)-Ryge criteria. The two-sided 95% confidence interval (CI) for the difference in success rate was considered to assess non-inferiority, and the margin was set at -18%. The linear mixed model and Firth's logistic regression model were used for data analysis (P < 0.05). RESULTS After 24 months, 86 teeth (43 per group) were evaluated. The mean PI score was 1.1(± 0.9), while DMFT/dmft was 0.35 (± 0.74) and 6.55 (± 2.25) respectively. The clinical and radiographic success rate of Dyract vs. ACTIVA was 95.3% and 88.3% vs. 93% and 86%, respectively. The two-sided 95% CI for the difference in success rate (-2.3%) was - 3.2 to 1.3% and didn't reach the predetermined margin of -18% which had been anticipated as the non-inferiority margin. Clinically, ACTIVA had a significantly better colour match (P = 0.002) but worse marginal discolouration (P = 0.0143). There were no significant differences regarding other clinical or radiographic criteria (P > 0.05). ACTIVA took significantly less placement time than Dyract, with a mean difference of 2.37 (± 0.63) minutes (P < 0.001). CONCLUSION The performance of ACTIVA was not inferior to Dyract and both materials had a comparable high clinical and radiographic performance in children with high-caries experience. ACTIVA had a significantly better colour match but more marginal discolouration. It took significantly less time to be placed in the oral cavity. TRIAL REGISTRATION The study was registered at ClinicalTrials.gov on 4 May 2018 (#NCT03516838).
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Affiliation(s)
- Reda Banon
- Paediatric Dentistry, Oral Health Sciences, ELOHA (Equal Lifelong Oral Health for All) research group, Ghent University Hospital, Ghent, Belgium.
| | - Jeroen Vandenbulcke
- Paediatric Dentistry, Oral Health Sciences, ELOHA (Equal Lifelong Oral Health for All) research group, Ghent University Hospital, Ghent, Belgium
| | - Jakob Van Acker
- Paediatric Dentistry, Oral Health Sciences, ELOHA (Equal Lifelong Oral Health for All) research group, Ghent University Hospital, Ghent, Belgium
| | - Luc Martens
- Paediatric Dentistry, Oral Health Sciences, ELOHA (Equal Lifelong Oral Health for All) research group, Ghent University Hospital, Ghent, Belgium
| | - Peter De Coster
- Department of Reconstructive Dentistry and Oral Biology, Oral Health Sciences, Ghent University Hospital, Ghent, Belgium
| | - Sivaprakash Rajasekharan
- Paediatric Dentistry, Oral Health Sciences, ELOHA (Equal Lifelong Oral Health for All) research group, Ghent University Hospital, Ghent, Belgium
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Rathinam E, Rajasekharan S, Declercq H, Vanhove C, De Coster P, Martens L. Effect of Intracoronal Sealing Biomaterials on the Histological Outcome of Endodontic Revitalisation in Immature Sheep Teeth-A Pilot Study. J Funct Biomater 2023; 14:jfb14040214. [PMID: 37103304 PMCID: PMC10144940 DOI: 10.3390/jfb14040214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/17/2023] [Accepted: 04/08/2023] [Indexed: 04/28/2023] Open
Abstract
The influence of intracoronal sealing biomaterials on the newly formed regenerative tissue after endodontic revitalisation therapy remains unexplored. The objective of this study was to compare the gene expression profiles of two different tricalcium silicate-based biomaterials alongside the histological outcomes of endodontic revitalisation therapy in immature sheep teeth. The messenger RNA expression of TGF-β, BMP2, BGLAP, VEGFA, WNT5A, MMP1, TNF-α and SMAD6 was evaluated after 1 day with qRT-PCR. For evaluation of histological outcomes, revitalisation therapy was performed using Biodentine (n = 4) or ProRoot white mineral trioxide aggregate (WMTA) (n = 4) in immature sheep according to the European Society of Endodontology position statement. After 6 months' follow-up, one tooth in the Biodentine group was lost to avulsion. Histologically, extent of inflammation, presence or absence of tissue with cellularity and vascularity inside the pulp space, area of tissue with cellularity and vascularity, length of odontoblast lining attached to the dentinal wall, number and area of blood vessels and area of empty root canal space were measured by two independent investigators. All continuous data were subjected to statistical analysis using Wilcoxon matched-pairs signed rank test at a significance level of p < 0.05. Biodentine and ProRoot WMTA upregulated the genes responsible for odontoblast differentiation, mineralisation and angiogenesis. Biodentine induced the formation of a significantly larger area of neoformed tissue with cellularity, vascularity and increased length of odontoblast lining attached to the dentinal walls compared to ProRoot WMTA (p < 0.05), but future studies with larger sample size and adequate power as estimated by the results of this pilot study would confirm the effect of intracoronal sealing biomaterials on the histological outcome of endodontic revitalisation.
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Affiliation(s)
- Elanagai Rathinam
- ELOHA (Equal Lifelong Oral Health for All) Research Group, Paediatric Dentistry, Oral Health Sciences, Ghent University Hospital, 9000 Ghent, Belgium
| | - Sivaprakash Rajasekharan
- ELOHA (Equal Lifelong Oral Health for All) Research Group, Paediatric Dentistry, Oral Health Sciences, Ghent University Hospital, 9000 Ghent, Belgium
| | - Heidi Declercq
- Tissue Engineering and Biomaterials Group, Department of Human Structure and Repair, Ghent University Hospital, Ghent University, 9000 Ghent, Belgium
- Tissue Engineering Laboratory, Department of Development and Regeneration, KU Leuven, 8500 Kortrijk, Belgium
| | - Christian Vanhove
- Medical Imaging & Signal Processing, Infinity Laboratory, Ghent University Hospital, Ghent University, 9000 Ghent, Belgium
| | - Peter De Coster
- Department of Reconstructive Dentistry and Oral Biology, Dental School, Ghent University Hospital, Ghent University, 9000 Ghent, Belgium
| | - Luc Martens
- ELOHA (Equal Lifelong Oral Health for All) Research Group, Paediatric Dentistry, Oral Health Sciences, Ghent University Hospital, 9000 Ghent, Belgium
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Roeykens H, De Coster P, Jacquet W, De Moor RJG. The Decisive Role of Laser Doppler Flowmetry for Pulp Preservation in Discolored Traumatized Teeth. Photobiomodul Photomed Laser Surg 2021:photob.2020.4907. [PMID: 33617722 DOI: 10.1089/photob.2020.4907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Objective: It has been stated that blood pigments within discolored teeth may interfere with Laser Doppler Flowmetry (LDF) measurements. The aim of this study was to assess pulp vitality with LDF in a cohort of discolored traumatized teeth referred for endodontic treatment or where the referring dentist had doubts regarding maintained tooth vitality. Background: Discoloration of teeth is a common sequel of dental trauma. Still today, it is taken as an indicator for root canal treatment. Transient apical breakdown (TAB) is confused with apical periodontitis, although it is a sequel of dental trauma in young mature teeth and will result in revascularization and dissolution of the apical radiolucency. Methods: A total of 26 patients with 28 discolored teeth, belonging to a cohort of referred patients with traumatized teeth referred for root canal treatment and/or pulp vitality assessment were screened on color with photographs by three investigators, with traditional sensibility tests and with a Moor VMS II LDF meter. Results: The color of the intrinsically discolored teeth was grayish in 58% of teeth, blue 20%, pink/crimson 12%, and yellow 4%. Eighty-five percent were central maxillary incisors, 11% were mandibulary incisors. Thanks to LDF, 43% of the trauma cases in this small cohort with discoloration underwent root canal treatment instead of 70% with traditional sensibility tests as indicator. TAB was found in 11%. Conclusions: LDF was decisive in diagnosing vitality of discolored teeth and there was no negative impact of tooth discoloration on LDF measurements.
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Affiliation(s)
- Herman Roeykens
- Sections of Reconstructive Dentistry and Endodontology, Ghent Dental Photonics Research Cluster, Department of Oral Health Sciences, Dental School, Ghent University, Ghent, Belgium
| | - Peter De Coster
- Sections of Reconstructive Dentistry and Endodontology, Ghent Dental Photonics Research Cluster, Department of Oral Health Sciences, Dental School, Ghent University, Ghent, Belgium
| | - Wolfgang Jacquet
- Section of Special Needs in Oral Health, Department of Oral Health Sciences, Dental School, Ghent University, Ghent, Belgium
- Department of Oral Health Sciences ORHE, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
- Department of Educational Sciences EDWE-LOCI, Faculty of Psychology and Educational Sciences, Vrije Universiteit Brussel, Brussels, Belgium
| | - Roeland Jozef Gentil De Moor
- Sections of Reconstructive Dentistry and Endodontology, Ghent Dental Photonics Research Cluster, Department of Oral Health Sciences, Dental School, Ghent University, Ghent, Belgium
- Ghent Dental Laser Center, MOND Latem, Sint Martens Latem, Ghent, Belgium
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Rathinam E, Govindarajan S, Rajasekharan S, Declercq H, Elewaut D, De Coster P, Martens L, Leybaert L. The calcium dynamics of human dental pulp stem cells stimulated with tricalcium silicate-based cements determine their differentiation and mineralization outcome. Sci Rep 2021; 11:645. [PMID: 33436827 PMCID: PMC7804324 DOI: 10.1038/s41598-020-80096-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 12/03/2020] [Indexed: 12/19/2022] Open
Abstract
Calcium (Ca2+) signalling plays an indispensable role in dental pulp and dentin regeneration, but the Ca2+ responses of human dental pulp stem cells (hDPSCs) stimulated with tricalcium silicate-based (TCS-based) dental biomaterials remains largely unexplored. The objective of the present study was to identify and correlate extracellular Ca2+ concentration, intracellular Ca2+ dynamics, pH, cytotoxicity, gene expression and mineralization ability of human dental pulp stem cells (hDPSCs) stimulated with two different TCS-based biomaterials: Biodentine and ProRoot white MTA. The hDPSCs were exposed to the biomaterials, brought in contact with the overlaying medium, with subsequent measurements of extracellular Ca2+ and pH, and intracellular Ca2+ changes. Messenger RNA expression (BGLAP, TGF-β, MMP1 and BMP2), cytotoxicity (MTT and TUNEL) and mineralization potential (Alizarin red and Von Kossa staining) were then evaluated. Biodentine released significantly more Ca2+ in the α-MEM medium than ProRoot WMTA but this had no cytotoxic impact on hDPSCs. The larger Biodentine-linked Ca2+ release resulted in altered intracellular Ca2+ dynamics, which attained a higher maximum amplitude, faster rise time and increased area under the curve of the Ca2+ changes compared to ProRoot WMTA. Experiments with intracellular Ca2+ chelation, demonstrated that the biomaterial-triggered Ca2+ dynamics affected stem cell-related gene expression, cellular differentiation and mineralization potential. In conclusion, biomaterial-specific Ca2+ dynamics in hDPSCs determine differentiation and mineralization outcomes, with increased Ca2+ dynamics enhancing mineralization.
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Affiliation(s)
- Elanagai Rathinam
- Department of Paediatric Dentistry and Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.
| | - Srinath Govindarajan
- Department of Internal Medicine and Paediatrics, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB-Center for Inflammation Research, Technologiepark 71, 9052, Zwijnaarde, Ghent, Belgium
| | - Sivaprakash Rajasekharan
- Department of Paediatric Dentistry and Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
| | - Heidi Declercq
- Tissue Engineering and Biomaterials Group, Department of Human Structure and Repair, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Tissue Engineering Lab, Department of Development and Regeneration, KU Leuven, 8500, Kortrijk, Belgium
| | - Dirk Elewaut
- Department of Internal Medicine and Paediatrics, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB-Center for Inflammation Research, Technologiepark 71, 9052, Zwijnaarde, Ghent, Belgium
| | - Peter De Coster
- Department of Reconstructive Dentistry and Oral Biology, Dental School, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
| | - Luc Martens
- Department of Paediatric Dentistry and Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
| | - Luc Leybaert
- Department of Basic And Applied Medical Sciences - Physiology Group, Ghent University, Ghent, Belgium
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6
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Rathinam E, Govindarajan S, Rajasekharan S, Declercq H, Elewaut D, De Coster P, Martens L. Transcriptomic profiling of human dental pulp cells treated with tricalcium silicate-based cements by RNA sequencing. Clin Oral Investig 2020; 25:3181-3195. [PMID: 33108483 DOI: 10.1007/s00784-020-03647-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 10/15/2020] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Tricalcium silicate (TCS)-based biomaterials induce differentiation of human dental pulp cells (hDPCs) into odontoblasts/osteoblasts, which is regulated by the interplay between various intracellular pathways and their resultant secretome. The aim of this study was to compare the transcriptome-wide effects by next-generation RNA sequencing of custom-prepared hDPCs stimulated with TCS-based biomaterials: ProRoot white MTA (WMTA) (Dentsply, Tulsa; Tulsa, OK) and Biodentine (Septodont, Saint Maur des Fosses, France). METHODS Self-isolated hDPCs were seeded in a 6-well plate at a density of 5 × 105 cells per well. ProRoot white MTA and Biodentine were then placed in transwell inserts with a pore size of 0.4 μm and inserted in the well plate. RNA sequencing was performed after 3 and 7 days treatment. For post-validation, RT-PCR analyses were done on some of the RNA samples used for RNA sequencing. RESULTS Our RNA sequencing results for the first time identified 7533 differentially expressed genes (DEGs) between different treatments and the number of DEGs in Biodentine was higher than ProRoot WMTA at both 3 and 7 days. Despite their differential gene expression, both the TCS-based biomaterial treatments showed gene expressions mainly involved in odontoblast differentiation, angiogenesis, neurogenesis, dentinogenesis, and tooth mineralization. CONCLUSIONS The results of the present study illustrate that several important signalling pathways are induced by hDPCs stimulated with TCS-based biomaterials. CLINICAL RELEVANCE The differential expression of the genes associated with odontogenesis, angiogenesis, neurogenesis, dentinogenesis, and mineralization may affect the prognosis of teeth treated with Biodentine or ProRoot white MTA.
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Affiliation(s)
- Elanagai Rathinam
- Department of Paediatric Dentistry & Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.
| | - Srinath Govindarajan
- Department of Internal Medicine and Paediatrics, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB-Center for Inflammation Research, Technologiepark 71, Zwijnaarde, 9052, Ghent, Belgium
| | - Sivaprakash Rajasekharan
- Department of Paediatric Dentistry & Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
| | - Heidi Declercq
- Tissue Engineering and Biomaterials Group, Department of Human Structure and Repair, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Tissue Engineering Lab, Department of Development and Regeneration, KU Leuven, 8500, Kortrijk, Belgium
| | - Dirk Elewaut
- Department of Internal Medicine and Paediatrics, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium.,Unit for Molecular Immunology and Inflammation, VIB-Center for Inflammation Research, Technologiepark 71, Zwijnaarde, 9052, Ghent, Belgium
| | - Peter De Coster
- Department of Reconstructive Dentistry and Oral Biology, Dental School, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
| | - Luc Martens
- Department of Paediatric Dentistry & Special Care, PAECOMEDIS Research Cluster, Ghent University, Ghent University Hospital, 9000, Ghent, Belgium
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Lekszas C, Foresti O, Raote I, Liedtke D, König EM, Nanda I, Vona B, De Coster P, Cauwels R, Malhotra V, Haaf T. Biallelic TANGO1 mutations cause a novel syndromal disease due to hampered cellular collagen secretion. eLife 2020; 9:51319. [PMID: 32101163 PMCID: PMC7062462 DOI: 10.7554/elife.51319] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Accepted: 02/24/2020] [Indexed: 12/15/2022] Open
Abstract
The transport and Golgi organization 1 (TANGO1) proteins play pivotal roles in the secretory pathway. Full length TANGO1 is a transmembrane protein localised at endoplasmic reticulum (ER) exit sites, where it binds bulky cargo within the ER lumen and recruits membranes from the ER Golgi intermediate compartment to create an exit route for their export. Here we report the first TANGO1-associated syndrome in humans. A synonymous substitution that results in exon eight skipping in most mRNA molecules, ultimately leading to a truncated TANGO1 protein was identified as disease-causing mutation. The four homozygously affected sons of a consanguineous family display severe dentinogenesis imperfecta, short stature, various skeletal abnormalities, insulin-dependent diabetes mellitus, sensorineural hearing loss, and mild intellectual disability. Functional studies in HeLa and U2OS cells revealed that the corresponding truncated TANGO1 protein is dispersed in the ER and its expression in cells with intact endogenous TANGO1 impairs cellular collagen I secretion.
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Affiliation(s)
- Caroline Lekszas
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany
| | - Ombretta Foresti
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Ishier Raote
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Daniel Liedtke
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany
| | - Eva-Maria König
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany
| | - Indrajit Nanda
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany
| | - Barbara Vona
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany.,Department of Otorhinolaryngology, Head and Neck Surgery, Tübingen Hearing Research Centre (THRC), Eberhard Karls University Tübingen, Tübingen, Germany
| | - Peter De Coster
- Department of Pediatric Dentistry and Special Care, PaeCoMeDis Research Group, Ghent University Hospital, Ghent, Belgium
| | - Rita Cauwels
- Department of Pediatric Dentistry and Special Care, PaeCoMeDis Research Group, Ghent University Hospital, Ghent, Belgium
| | - Vivek Malhotra
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University Würzburg, Würzburg, Germany
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Haddaji Mastouri M, De Coster P, Zaghabani A, Jammali F, Raouahi N, Ben Salem A, Saad A, Coucke P, H'mida Ben Brahim D. Genetic study of non-syndromic tooth agenesis through the screening of paired box 9, msh homeobox 1, axin 2, and Wnt family member 10A genes: a case-series. Eur J Oral Sci 2017; 126:24-32. [PMID: 29114927 DOI: 10.1111/eos.12391] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/03/2017] [Indexed: 02/04/2023]
Abstract
Non-syndromic tooth agenesis (NSTA) is the most common developmental anomaly in humans. Several studies have been conducted on dental agenesis and numerous genes have been identified. However, the pathogenic mechanisms responsible for NSTA are not clearly understood. We studied a group of 28 patients with sporadic NSTA and nine patients with a family history of tooth agenesis. We focused on four genes - paired box 9 (PAX9), Wnt family member 10A (WNT10A), msh homeobox 1 (MSX1), and axin 2 (AXIN2) - using direct Sanger sequencing of the exons and intron-exon boundaries. The most prevalent variants identified in PAX9 and AXIN2 genes were analyzed using the chi-square test. The sequencing results revealed a number of variants in the AXIN2 gene, including one novel missense mutation in one patient with agenesis of a single second premolar. We also identified one variant in the AXIN2 gene as being a putative risk factor for tooth agenesis. Only one missense mutation was identified in the WNT10A gene and this mutation was found in two patients. Interestingly, WNT10A is reported as the most prevalent gene mutated in the European population with NSTA.
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Affiliation(s)
- Marwa Haddaji Mastouri
- Department of Human Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Hospital, Sousse, Tunisia
| | - Peter De Coster
- Department of Restorative Dentistry, Endodontology and Oral Biology, Ghent University Hospital, Ghent University, Ghent, Belgium
| | | | - Frej Jammali
- Department of Orthodontics, Farhat Hached University Hospital, Sousse, Tunisia
| | - Nabiha Raouahi
- Department of Orthodontics, Farhat Hached University Hospital, Sousse, Tunisia
| | | | - Ali Saad
- Department of Human Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Hospital, Sousse, Tunisia
| | - Paul Coucke
- Center for Medical Genetics, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Dorra H'mida Ben Brahim
- Department of Human Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Hospital, Sousse, Tunisia
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Haddaji Mastouri M, De Coster P, Zaghabani A, Trabelsi S, May Y, Saad A, Coucke P, H’mida Ben Brahim D. Characterization of a novel mutation in PAX9 gene in a family with non-syndromic dental agenesis. Arch Oral Biol 2016; 71:110-116. [DOI: 10.1016/j.archoralbio.2016.07.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 07/22/2016] [Accepted: 07/27/2016] [Indexed: 10/21/2022]
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10
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Rathinam E, Rajasekharan S, Chitturi RT, Martens L, De Coster P. Gene Expression Profiling and Molecular Signaling of Dental Pulp Cells in Response to Tricalcium Silicate Cements: A Systematic Review. J Endod 2015; 41:1805-17. [DOI: 10.1016/j.joen.2015.07.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 07/09/2015] [Accepted: 07/24/2015] [Indexed: 12/29/2022]
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Cosyn J, Christiaens V, Koningsveld V, Coucke PJ, De Coster P, De Paepe A, De Bruyn H. An Exploratory Case-Control Study on the Impact ofIL-1Gene Polymorphisms on Early Implant Failure. Clin Implant Dent Relat Res 2014; 18:234-40. [DOI: 10.1111/cid.12237] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jan Cosyn
- Department of Periodontology and Oral Implantology; Dental School; Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
- Dental Medicine; Faculty of Medicine and Pharmacy; Free University of Brussels; Brussels Belgium
| | - Véronique Christiaens
- Department of Periodontology and Oral Implantology; Dental School; Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
| | - Vincent Koningsveld
- Dental School; Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
| | - Paul J. Coucke
- Center for Medical Genetics; Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
| | - Peter De Coster
- Unit of Oral Development and Applied Oral Histology; PaeCaMed Research Group; Dental School; Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
| | - Anne De Paepe
- Center for Medical Genetics; Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
| | - Hugo De Bruyn
- Periodontology and Oral Implantology; Dental School; Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
- Department of Prosthodontics; Faculty of Odontology; Malmö University; Malmö Sweden
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Abstract
OBJECTIVE The purpose of this systematic review was to identify high-quality articles comparing laser with conventional pulpotomy procedures, and to assess whether laser treatment may offer an appreciable benefit over conventional approaches. METHODS A systematic search was implemented for MEDLINE, WEB of SCIENCE and Cochrane's CENTRAL databases (1980-2012) to identify eligible studies. Two reviewers independently assessed the methodological quality of the articles (Κ = 0.89) using specific study design-related quality assessment forms (Dutch Cochrane Collaboration). RESULTS Seven articles met the inclusion criteria, of which five randomized control trials (RCT) and two case series (CS), involving Nd:YAG, Er:YAG, CO₂ and 632/980 nm diode lasers. Although heterogeneity between pulpotomy studies was high, odds ratios (OR) were generally <1, indicating that laser is less successful than conventional pulpotomy techniques. CONCLUSION Given the paucity and high heterogeneity of high-quality articles, general recommendations for the clinical use of laser in pulpotomy in primary teeth can yet not be formulated.
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Affiliation(s)
- Peter De Coster
- Oral Biology, Dental School, Ghent University, Ghent, Belgium
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Staels S, De Coster P, Vral A, Temmerman L, De Pauw G. An experimental study on periodontal regeneration after subcutaneous transplantation of rat molar with and without cryopreservation: an in vivo study. Cryobiology 2013; 66:303-10. [PMID: 23562570 DOI: 10.1016/j.cryobiol.2013.03.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 02/01/2013] [Accepted: 03/11/2013] [Indexed: 11/17/2022]
Abstract
This study analysed the effects of cryopreservation on periodontal regeneration of autotransplanted rat molars. First and second maxillary molars (n=92) of 24 four-week-old Wistar rats were gently extracted and autotransplanted into the abdominal tissue immediately (control group n=44) or after cryopreservation in liquid nitrogen for 7 days (experimental group n=48). At 1, 2, 4 and 10 weeks after transplantation, the transplanted molars were excised and regeneration of the periodontal tissues was analysed on histological sections stained with routine H&E and Goldner method. Different tissue responses were scored on a tooth basis: inflammation, regeneration of the periodontal ligament, resorption/apposition of cementum, and alveolar bone formation. Sixty-two teeth were available for histological evaluation, including 30 experimental and 32 control samples. One week after transplantation, both control and test teeth were surrounded by granulation tissue and some areas of root resorption could be seen. After 2 weeks, signs of regeneration of the periodontal ligament, cementum apposition, and new bone formation roughly coincided in both groups, however markedly retarded in the experimental group. After 4 weeks, regeneration progressed equally in both groups, presenting fewer areas of cementum apposition in experimental samples. Finally, 10 weeks after baseline transplantation, no significant differences between both groups could be observed. Cryopreservation followed by autotransplantation of extracted teeth in rats appears to have minimal detrimental effects on regeneration of periodontal tissues after integration periods of 1-10 weeks. However, the present findings indicated that the regeneration process in general is retarded for cryopreserved teeth, as compared to their immediately transplanted homologues.
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Affiliation(s)
- Sarah Staels
- Department of Orthodontics, Dental School, University of Ghent, Belgium.
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14
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De Coster P, Browaeys H, De Bruyn H. Healing of extraction sockets filled with BoneCeramic® prior to implant placement: preliminary histological findings. Clin Implant Dent Relat Res 2011; 13:34-45. [PMID: 19681930 DOI: 10.1111/j.1708-8208.2009.00184.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Various grafting materials have been designed to minimize edentulous ridge volume loss following tooth extraction by encouraging new bone formation in healing sockets. BoneCeramic® is a composite of hydroxyapatite and bèta-tricalcium phosphate with pores of 100-500 microns. PURPOSES The aim of this study was to evaluate bone regeneration in healing sockets substituted with BoneCeramic® prior to implant procedures. MATERIALS AND METHODS Fifteen extraction sockets were substituted with BoneCeramic® and 14 sockets were left to heal naturally in 10 patients (mean age 59.6 years). Biopsies were collected only from the implant recipient sites during surgery after healing periods ranging from 6-74 weeks (mean 22). In total, 24 biopsies were available; 10 from substituted and 14 from naturally healed sites. In one site, the implant was not placed intentionally and, in four substituted sites, implant placement had to be postponed due to inappropriate healing, hence from five sites biopsies were not available. Histological sections were examined by transmitted light microscope. RESULTS At the time of implant surgery, bone at substituted sites was softer than in controls, compromising initial implant stability. New bone formation at substituted sites was consistently poorer than in controls, presenting predominantly loose connective tissue and less woven bone. CONCLUSION The use of BoneCeramic® as a grafting material in fresh extraction sockets appears to interfere with normal healing processes of the alveolar bone. On the basis of the present preliminary findings, its indication as a material for bone augmentation, when implant placement is considered within 6-38 weeks after extraction, should be revised.
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Affiliation(s)
- Peter De Coster
- Unit of Oral Development and Applied Oral Histology, Paecamed Research, Faculty of Medicine and Health Sciences, Dental School, University of Ghent, De Pintelaan 185, Ghent, Belgium
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Malfait F, De Coster P, Hausser I, van Essen AJ, Franck P, Colige A, Nusgens B, Martens L, De Paepe A. The natural history, including orofacial features of three patients with Ehlers-Danlos syndrome, dermatosparaxis type (EDS type VIIC). ACTA ACUST UNITED AC 2004; 131:18-28. [PMID: 15389701 DOI: 10.1002/ajmg.a.30299] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Ehlers-Danlos syndrome (EDS) dermatosparaxis type (type VIIC) and the related disease of cattle dermatosparaxis, are recessively inherited connective tissue disorders, caused by a deficient activity of procollagen I N-proteinase, the enzyme that excises the N-terminal propeptide in procollagen type I, type II, and type III. Although well documented in cattle, to date only seven human cases have been recorded, most of them aged under 2 years. We document the natural history of three patients with EDS dermatosparaxis type, two of whom have been reported before the age of 2 years, and one new patient. The phenotype of the patients, and especially the facial resemblance, is striking, making this a clinically recognizable condition. The most consistent anomalies during the first years of life are premature rupture of the membranes, extreme skin fragility and easy bruising, large fontanels, blue sclerae, puffy eyelids, micrognathia, umbilical hernia, and short fingers. Joint hypermobility becomes more important with age. The children are at risk for rupture of internal organs due to soft tissue fragility, as is illustrated by different internal events in two of the three patients described here. Orofacial features include micrognathia, a frontal open bite, and gingival hyperplasia with varying degrees of hyperkeratosis. The deciduous dentition shows abnormal morphology of the molars, obliteration of the tooth pulp, and severe enamel attrition. The permanent dentition shows agenesis and microdontia of several teeth. Tooth discoloration, dysplastic roots, and tooth pulp obliteration are present in a restricted number of permanent teeth.
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Affiliation(s)
- Fransiska Malfait
- Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium
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De Coster P, Martens L, De Paepe A. Novel dental anomalies associated with congenital contractural arachnodactyly: a case report. Pediatr Dent 2004; 26:478; author reply 478. [PMID: 15646904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
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Abstract
Marfan syndrome (MFS) is a connective tissue disorder with autosomal dominant inheritance. Mutations in the FBN1 gene cause deficient processing of fibrillin-1, the main constituent of extracellular microfibrils, affecting tissues displaying elastic properties. Clinical manifestations are widespread and involve the skeletal, ocular, cardiovascular and pulmonary systems, skin and integumentum, and dura. A highly arched palate and retrognathia have been assigned to the symptoms with minor diagnostic specificity, although epidemiological data on prevalence are lacking yet. Twenty-six patients with MFS (n = 26) were studied for craniofacial characteristics using cephalometric measurements on lateral cranial radiographs. The purposes of this study were (1) to compare cephalometric variables of MFS group with age- and sex-matched population norms, and (2) to assess differences in palatal vault dimensions among adult MFS (n = 17) and matched controls (n = 32) by means of cephalometric measurements. Significant differences with population norms were found in the structures of the cranial base, the maxillary complex, the mandible body, and the relations of the jaws with respect to the cranial base and to each other. Palatal height and palatal length were significantly larger in MFS, and were significantly correlated to each other and to the height of the maxillo-alveolar processus. The present data disprove in part previously reported findings, possibly due to biased patient selection in these studies or demographic differences. However, a strong correlation was found between maxillary/mandibular retrognathia, long face, highly arched palate, and MFS. A combination of both intrinsic genetic factors and environmental factors is suggested as a possible explanation for specific morphogenetic aspects of the craniofacial complex in MFS.
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Affiliation(s)
- Peter De Coster
- Department of Paediatric Dentistry, Center for Special Care, Paecamed Research, University of Ghent, B-9000 Ghent, Belgium
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