Proposed business combination to create a Nasdaq-listed medical device company focused on advancing the commercial execution and market development of Keystone’s comprehensive portfolio of implants, arches and other tooth replacement solutions Keystone 2022 revenues exceeded $60 million The combined company will trade on the NASDAQ with the ticker “KSD” Investor conference call and webcast scheduled for 8:30 a.m. ET on Thursday, August 17th IRVINE, Calif. and BURLINGTON, Mass., Aug. 16, 2023 (GL