Effects of structural orientation of enamel and dentine on light attenuation and local refractive index: an optical coherence tomography study

Journal of Dentistry
Ilnaz HaririYasunori Sumi

Abstract

To investigate optical properties of human enamel and dentine in relationship to structural orientation of enamel prisms and dentinal tubules by optical coherence tomography (OCT). Discs of 300-400μm thickness including enamel with cross-cut or long-cut prisms and mid-coronal dentine with cross-cut, long-cut or oblique-cut tubules were obtained from 28 non-carious freshly extracted human third molars sectioned at different directions. Each disc was placed over a metal plate and B-scan images were obtained by a swept-source OCT at 1330nm centre wavelength (Dental SS-OCT Prototype 1, Panasonic Healthcare Co., Ltd, Japan). Refractive index (n) calculated from optical path length and real thickness, and OCT signal slope (OCTSS) in relation to structural orientation were statistically compared among groups (α=0.05). The discs were sectioned and observed under SEM to confirm prism or tubule orientations. No significant differences were found in n and OCTSS among cross-cut and long-cut enamel groups (p>0.05). However, in dentine, there was a significant difference in both variables among different regions. In cross-cut tubule orientation, the average n and OCTSS values were significantly lower compared to other two groups (long-cut an...Continue Reading

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Citations

Sep 8, 2012·Journal of Dentistry·Masatoshi NakajimaJunji Tagami
Apr 15, 2014·Lasers in Surgery and Medicine·Jennifer S HoltzmanPetra Wilder-Smith
Nov 10, 2015·The Journal of Prosthetic Dentistry·Ioana S Pop-CiutrilaDiana Dudea
Jul 8, 2015·Journal of Dentistry·Ioana-Sofia Pop-CiutrilaMandra Badea
Oct 10, 2012·Journal of Dentistry·Turki A BakhshYasunori Sumi
Feb 18, 2014·Lasers in Medical Science·Mona M MandurahJunji Tagami
Mar 5, 2015·Dental Materials : Official Publication of the Academy of Dental Materials·Hussam MillyAvijit Banerjee
Jun 7, 2016·Journal of Dentistry·Rena OguroYasunori Sumi
Jul 21, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Yuan ZhouJunji Tagami
Jul 21, 2017·Orthodontics & Craniofacial Research·T A BakhshM A Abbassy
Mar 9, 2018·Dental Materials Journal·Jorge EspigaresAlireza Sadr
May 5, 2017·Physiological Reviews·Rodrigo S LacruzMichael L Paine
Oct 26, 2013·British Dental Journal·P LancasterV Clerehugh
Jun 1, 2018·Dental Materials Journal·Minh Nguyet LuongJunji Tagami
Nov 6, 2018·Journal of Oral Rehabilitation·Hiba Al-ImamKlaus Gotfredsen
May 11, 2019·Orthodontics & Craniofacial Research·Chris BockletJansen Nash
Jul 26, 2019·Dental Materials Journal·Rima Zakzuk AlshahniJunji Tagami
Oct 1, 2019·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Ethan DuttonWalter Renne
May 15, 2020·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Yasmine AshrafKamal Ebeid
May 2, 2018·Clinical Oral Investigations·Hanan ElgendyFang Qian
Oct 27, 2017·Journal of Healthcare Engineering·Monika MachoyKrzysztof Woźniak
Dec 6, 2018·Brazilian Dental Journal·Sheila Mara Morais SantosAndré Luis Faria-E-Silva
Oct 25, 2017·Journal of Periodontal Research·S KakizakiY Izumi

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