Objective: To test the possible association between enamel colour alteration and resin tag depth.
Design: In vitro laboratory study.
Setting: Department of Orthodontics, Alexandria University, Egypt.
Materials And Methods: Fifty freshly extracted human premolar teeth were equally divided randomly into a control and four experimental groups. Teeth in group I received only enamel prophylaxis. Teeth in groups II and III were etched with 35% phosphoric acid for 15 and 60 seconds, respectively. Teeth in group IV were conditioned with Prompt L-pop self-etching primer and in group V with Xeno III self-etching primer, according to the manufacturer's instructions. Orthodontic brackets were bonded to the teeth in all experimental groups using Transbond XT composite. Following bracket debonding, finishing and polishing were performed. Enamel colour was evaluated spectrophotometrically at baseline and then after debonding, with the corresponding colour differences ΔE calculated. Resin tags lengths were measured on sectioned teeth in each experimental group under scanning electron microscope.
Results: All experimental groups showed clinically perceivable colour change after debonding and finishing as all values were exceeded the clinical colour detection threshold of ΔE = 3.7 units. Significant differences (P<0.05) in resin tag length were found in all experimental groups. Significant moderate correlation was found between colour change and resin tags length when all teeth were combined and tested, irrespective of group.
Conclusions: Moderate evidence exists that shorter resin tag penetration produces less change in enamel colour following clean-up and polishing. Self-etch primers produce less resin penetration and these systems may produce less iatrogenic colour change in enamel following orthodontic treatment.
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http://dx.doi.org/10.1179/1465312512Z.0000000009 | DOI Listing |
BMJ Case Rep
January 2025
Department of Periodontology, King George's Medical University, Lucknow, Uttar Pradesh, India.
Amelogenesis imperfecta (AI) is a genetic disorder that affects both primary and permanent teeth. It primarily manifests as developmental disorders of enamel. The condition occurs independently of other systemic disorders and is caused by mutations in genes responsible for enamel formation, inherited in autosomal dominant, autosomal recessive or X-linked patterns.
View Article and Find Full Text PDFLasers Med Sci
January 2025
School of Medicine and Dentistry, Griffith University, Gold Coast, QLD, Australia.
This in-vitro study assessed the influence of the shade of human teeth on the transmission of near-infrared light. A total of 40 teeth were used. After cleaning the root surface and removing cementum, the teeth were sectioned into slices 3 mm thick, with each comprising a portion of the crown (enamel-dentine (ED)) and of the root (dentine only).
View Article and Find Full Text PDFJ Funct Biomater
December 2024
Department of Operative Dentistry, School of Dentistry, University of São Paulo, Avenida Professor Lineu Prestes, 2227, São Paulo 05508-000, SP, Brazil.
This study evaluated the color change (ΔE) and penetration depth (PD) of white spot lesions (WSLs) infiltrated with the resin infiltrant (Icon) functionalized with methacrylate epigallocatechin-3-gallate (EGCG). To introduce polymerizable double bonds, EGCG was reacted with methacryloyl chloride (EM). Subsequently, the Icon resin infiltrant (I) was loaded with neat EGCG (IE) or EGCG-methacrylate (IEM) at 2 wt% each.
View Article and Find Full Text PDFOphthalmic Genet
January 2025
Department of Ophthalmology, Hospital das Clínicas - Empresa Brasileira de Serviços Hospitalares, Federal University of Pernambuco, Recife, Brazil.
Background: Oculodentodigital dysplasia (ODDD) is a rare syndrome that causes a constellation of facial, ophthalmic, dental, and limb abnormalities. Variants in the gap junction alpha-1 () gene have been described in patients with ODDD. Hereby we present the ocular manifestations in a patient with recessive ODDD due to a novel homozygous frameshift variant in .
View Article and Find Full Text PDFJ Esthet Restor Dent
January 2025
Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, Sao Paulo, Brazil.
Purpose: To compare the color alteration, surface roughness and microhardness and cross-sectional microhardness of bovine enamel treated with at-home whitening strips and gels.
Materials And Methods: Sixty-six pigmented specimens (n = 11) were allocated to six groups: C-cotton wool moistened with distilled water for 1 h; SDS-sodium dithionite strip, for 1 h; HPS-6.5% hydrogen peroxide strip, for 1 h; CPS-20% carbamide peroxide strip, for 1 h; HPG-7.
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