Degraded prism sheaths in the transition region of hypomineralized teeth

Journal of Dentistry
Y L ChanN M King

Abstract

Failure of the enamel adjacent to the defects in teeth with molar incisor hypomineralization (MIH) limits the success rate of the restorations placed in these teeth and this frequently leads to their ultimate extraction. To understand the cause, a state-of-the-art combination of focused ion beam (FIB) and nanoindentation techniques was used to evaluate the fracture properties and microstructure of enamel from specific regions of two MIH teeth. Nanoindentation, bend tests on micro-cantilevers and transmission electron microscopy (TEM) were employed to compare the microstructure and mechanical properties of the unaffected, opaque and transitional region in two MIH teeth. Special attention was paid to the transitional region in all the experiments in an attempt to identify its role in affecting the overall integrity of the MIH teeth. The enamel in the transitional region, despite its translucent appearance under the naked eye, was found, under TEM, to have prism sheaths that were significantly less mineralized than unaffected enamel and were proved to be weaker in holding the prisms together when measured using bend tests on micro-cantilever samples machined from the region. The enamel in the transitional region adjacent to the de...Continue Reading

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Citations

May 14, 2011·Journal of the Mechanical Behavior of Biomedical Materials·Y L ChanN M King
May 30, 2013·Australian Dental Journal·S Salanitri, W K Seow
Aug 26, 2014·Journal of the Mechanical Behavior of Biomedical Materials·Ezgi D YilmazGerold A Schneider
Feb 23, 2013·Restorative Dentistry & Endodontics·Hee-Jin KimSu-Jung Park
Feb 13, 2015·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Lisa MelinDavid H Cornell
Apr 16, 2013·Lasers in Medical Science·Carlos de Paula EduardoJan Tunér
Jun 20, 2019·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Omar Marouane, Nabiha Douki
Jun 5, 2020·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Omar Marouane, Fadwa Chtioui
Apr 30, 2019·European Journal of Oral Sciences·Per MalmbergDiana Bernin
Jan 10, 2020·Acta Biomaterialia·Jasmin KoldehoffGerold A Schneider
Mar 18, 2021·International Journal of Paediatric Dentistry·Omar Marouane, David J Manton
Sep 30, 2021·European Archives of Paediatric Dentistry : Official Journal of the European Academy of Paediatric Dentistry·Y-L LeeM Ekambaram

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