Barbara Janssens

Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement The data that support the findings of this study are available from the corresponding author upon reasonable request. Supporting Information Filename Description idh70080-sup-0001-Appendix1.docxWord 2007 document , 21.2 KB Appendix 1 includes the Checklist for Reporting Of Survey Studies (CROSS), available from the EQUATOR Network (www.equator-network.org).

1 Introduction Despite being largely preventable, oral diseases are highly prevalent, affecting over 3.7 billion people worldwide, including older adults [1]. As a result of ageing societies and changing oral epidemiology, older adults are now living longer and with heavily restored natural teeth and dental prostheses, thereby increasing the risk of oral conditions and complex treatment needs later in life [2].

EDITORIAL Editorial: Health services research in an ageing society Barbara E. Janssens, Corresponding Author Barbara E. Janssens Department of Oral Health Sciences, Gerodontology, ELOHA (Equal Lifelong Oral Health for All) research group, Ghent University, Ghent, Belgium Correspondence Barbara E. Janssens Email: barbarae.janssens@ugent.be Search for more papers by this authorMoira B. Smith, Moira B.