A randomized pilot study is designed to determine marginal bone changes between patients treated with a milled framework in Co/Cr if the connection is Internal or External for the rehabilitation of a partially edentulous area with a multiunit screw retained bridge. The investigation will be performed in one clinical centre affiliated to the Department of Prosthodontics, Faculty of Odontology, Malmö University . In this center the clinician and the examiner will be the same person.