This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record . Please cite this article as doi: 10.1111/ipd.12433 This article is protected by copyright. All rights reserved Validity and reproducibility testing of the Molar Incisor Hypomineralisation (MIH) Index AGHAREED GHANIM, RODRIGO MARIÑO, DAVID J. MANTON. Melbourne Dental School, The University of Melbourne, Parkville Vic., Australia. Running title: MIH index validation. Number of words in abstract 198 Number of words in abstract and text including references and bullet points 4309 Authors Dr Aghareed Ghanim: Clinical Senior Fellow, Melbourne Dental School, The University of Melbourne, Australia. E-mail: aghareed.alqassab@unimelb.edu.au Professor Rodrigo Mariño: Principal Research Fellow, Oral Health Cooperative Research Centre, Melbourne Dental School, The University of Melbourne, Australia. E-mail: marino@unimelb.edu.au Professor David Manton: Elsdon Storey Chair of Child Dental Health, Melbourne Dental School, The University of Melbourne, Australia. E-mail: djmanton@unimelb.edu.au Author Manuscript