1
|
François P, Benoit A, Slimani L, Dufresne A, Gouze H, Attal JP, Mangione F, Dursun E. In vitro remineralization by various ion-releasing materials of artificially demineralized dentin: A micro-CT study. Dent Mater 2024; 40:520-526. [PMID: 38212175 DOI: 10.1016/j.dental.2023.12.013] [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: 05/30/2023] [Accepted: 12/19/2023] [Indexed: 01/13/2024]
Abstract
OBJECTIVE The aim of this study was to evaluate the remineralizing properties of ion-releasing restorative materials on pH cycling-induced carious dentin. METHODS Fifty sound molars were freshly extracted. The occlusal surfaces were abraded using water-cooled sandpaper (800 grit). The residual crowns were embedded in self-cured acrylic resin with the flat dentin surface exposed. A mesio-distal trench was created using a calibrated 0.5 mm deep occlusal reduction burr, and artificial dentin caries were generated by pH cycling. Then, teeth were randomly assigned to five groups according to the ion-releasing material used. For each sample, micro-CT acquisitions were performed at various intervals. Remineralization was assessed by mean gray value (MGV) measurements after registration and segmentation of the region of interest with 3D Slicer software. One-way repeated-measures ANOVA followed by Tukey's post hoc test was used to investigate the difference in MGVs among the various groups. RESULTS Only Cention Forte showed significantly increased MGVs after 4 weeks compared to demineralized dentin. MGVs were higher, but not significantly, after placement of the restorative materials, including in the resin composite control group. These results can be explained by the radiopacity of the materials. SIGNIFICANCE Cention Forte, the material with the highest radiopacity, showed a significant increase in the MGVs of artificially carious dentin after 4 weeks. However, the study of dentin remineralization by micro-CT could be impacted by the radiopacity of the restorative materials used. The relevance of this examination for the study of dentinal remineralization should be investigated.
Collapse
Affiliation(s)
- Philippe François
- Department of Dental Materials, Faculty of Dental Surgery, University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France; URP 4462, Innovative Dental Materials and Interfaces Research Unit, University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France
| | - Aurélie Benoit
- Department of Dental Materials, Faculty of Dental Surgery, University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France; URP 4462, Innovative Dental Materials and Interfaces Research Unit, University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France
| | - Lotfi Slimani
- URP 2496, Laboratory Orofacial Pathologies, Imaging and Biotherapies, Life Imaging Platform (PIV), University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France
| | - Ambre Dufresne
- URP 2496, Laboratory Orofacial Pathologies, Imaging and Biotherapies, Life Imaging Platform (PIV), University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France
| | - Hélène Gouze
- CESP-INSERM, University Paris-Saclay, 16 avenue Paul Vaillant Couturier, 94800 Villejuif, France
| | - Jean-Pierre Attal
- Department of Dental Materials, Faculty of Dental Surgery, University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France; URP 4462, Innovative Dental Materials and Interfaces Research Unit, University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France
| | - Francesca Mangione
- URP 2496, Laboratory Orofacial Pathologies, Imaging and Biotherapies, Life Imaging Platform (PIV), University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France; Department of Imagery, Faculty of Dental Surgery, University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France
| | - Elisabeth Dursun
- URP 4462, Innovative Dental Materials and Interfaces Research Unit, University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France; Department of Pediatric Dentistry, Faculty of Dental Surgery, University Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France.
| |
Collapse
|
2
|
Li Y, Li Y, Bai Q, Wen M, Ma D, Lin Y, Chu J. Recombinant amelogenin peptide TRAP promoting remineralization of early enamel caries: An in vitro study. Front Physiol 2023; 14:1076265. [PMID: 36755789 PMCID: PMC9899998 DOI: 10.3389/fphys.2023.1076265] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 01/13/2023] [Indexed: 01/24/2023] Open
Abstract
Objective: To explore the regulatory effect of recombinant amelogenin peptide TRAP on the remineralization of early enamel carious lesions. Methods: Forty-eight bovine enamel blocks that prepared initial lesions in vitro were split at random into four groups for immersion treatment for 12 days: 1) remineralizing medium; 2) studied peptide 1 (consisting of the N- and C-termini of porcine amelogenin) + remineralizing medium; 3) studied peptide 2 (TRAP) + remineralizing medium; 4) fluoride + remineralizing medium. After demineralization and remineralization immersion, each specimen's mean mineral loss and lesion depth were measured using micro-computed tomography (micro-CT). The changes in lesion depth (∆LD) and mineral gain (∆Z) were computed following remineralization. The enamel samples were then cut into sections and examined with polarized light microscopy (PLM). The cross-section morphology was observed by scanning electron microscopy (SEM). The crystal phase was analyzed by an X-ray micro-diffractometer (XRD). The calcium-binding properties were determined using isothermal titration calorimetry (ITC). Results: Micro-CT analysis revealed a significant reduction in mineral loss in the four groups following the remineralization treatment (p < 0.05). The treatment with fluoride resulted in the greatest ∆Z and ∆LD, whereas the treatment with a remineralizing medium showed the least ∆Z and ∆LD among all groups. The ∆Z and ∆LD of the studied peptide 1 and studied peptide 2 groups were greater than those of the remineralizing medium group. However, there was no significant difference between the studied peptide 1 and studied peptide 2 groups (p > 0.05). All of the samples that the PLM analyzed had a thickening of the surface layer. A negative birefringent band changed in the lesion's body. The SEM displayed that minerals were formed in all four groups of samples. The XRD results indicated that the products of remineralization of the studied peptide were hydroxyapatite crystals (HA). ITC showed that there were two binding modes between the calcium and peptide TRAP. Conclusion: This study confirmed the potential of the recombinant amelogenin peptide TRAP as a key functional motif of amelogenin protein for enamel remineralization and provided a promising biomaterial for remineralization in initial enamel carious lesion treatment.
Collapse
Affiliation(s)
- Yaru Li
- 1The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,2College of Stomatology, Zhengzhou University, Zhengzhou, China
| | - Yiwei Li
- 1The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,2College of Stomatology, Zhengzhou University, Zhengzhou, China
| | - Qinghua Bai
- 1The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,2College of Stomatology, Zhengzhou University, Zhengzhou, China
| | - Mingzhu Wen
- 1The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,2College of Stomatology, Zhengzhou University, Zhengzhou, China
| | - Dandan Ma
- 1The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yisha Lin
- 1The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,2College of Stomatology, Zhengzhou University, Zhengzhou, China
| | - Jinpu Chu
- 1The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China,*Correspondence: Jinpu Chu,
| |
Collapse
|