Received: 6 March 2021
Accepted: 17 June 2021
First Online: 1 October 2021
: The study was approved by The North Denmark Region Committee on Health Research Ethics, Aalborg, Denmark (approval no: N-20170087) and The Swedish Ethical Review Authority in Lund, Sweden (approval no: Dnr. 2018/297). Patients were recruited by public invitation through Facebook or admitted to the Department of Oral and Maxillofacial surgery, Aalborg University Hospital, Aalborg, Denmark or Department of Oral and Maxillofacial Surgery and Oral Medicine, Malmö University, Malmö, Sweden for implant placement in the posterior maxilla.
: Not applicable.
: All authors declare no financial interest or conflict of interest, either directly or indirectly, in the products or information listed in the article.