Fig. 1

The surgical and prosthesis procedures of the test group. a Buccal view of the preoperative situation. b A mucoperiosteal flap was raised, and the tooth was extracted. c Deproteinized bovine bone was inserted into the implant-socket gap. d Buccal view before the second surgery. e Connective tissue was placed in a supraperiosteal envelope flap. f Buccal view after definitive prosthesis connection