Received: 4 August 2019
Accepted: 3 September 2019
First Online: 16 September 2019
Compliance with ethical standards
: An informed and voluntary written consent was obtained prior to clinical examination according to the ethical principles of the Declaration of Helsinki (version 2013). The protocol study was approved by the Ethical Committee of the dentistry department of the faculty.
: The authors declare that they have no conflict of interest.