title: Peri-implant bone changes following tooth extraction, immediate placement and loading of implants in the edentulous maxilla.
abstract: The aim of this study was to clinically and radiographically evaluate peri-implant bone level changes after rehabilitation of a fully edentulous maxilla by placement of six implants in either fresh extraction sites or healed edentulous ridges up till 18 months after implant placement. Twenty patients with a terminal dentition in the maxillae (11 men, 9 women) received a total of 120 OsseoSpeed implants; 118 implants could be loaded immediately of which 59 were placed in extraction sockets and 59 were placed in healed sites. Within 24 h after surgery, all patients received a chairside-assembled, fibre-reinforced temporary fixed prosthetic reconstruction in occlusion. Six months post-surgery, final screw-retained CoCr (15) or Ti (5) computer numerical control-milled and acrylic-veneered frameworks were placed directly at implant level without interposing abutments. Intraoral radiographs were taken 6 and 18 months after implant placement. Implant survival rate was 100%. Mean marginal bone level was located on average -0.35 mm below the reference point (standard deviation 0.29, range -1.20 to +0.02 mm) 18 months after loading. Whether implants were placed in healed bone sites or fresh extraction sockets did not significantly affect the bone level changes. Furthermore, the use of either CoCr or Ti at the implant level did not significantly affect marginal bone loss. Within the limits of this prospective clinical trial, results seem to indicate that immediate placement and occlusal loading of five to six implants in the edentulous maxilla can be carried out successfully. Whether or not those implants are placed in fresh extraction sockets does not seem to alter the outcome. The present data show a successful 1-year outcome of a treatment protocol involving tooth extraction immediately combined with implant placement and loading.
authors.affiliation: Training Center for Dental Students of KU Leuven, Sint-Jan Hospital, Ruddershove 10, 8000 Bruges, Belgium. Lieven.Barbier@azsintjan.be
authors.forename: Lieven
authors.initials: L
authors.lastname: Barbier
authors.forename: Johan
authors.initials: J
authors.lastname: Abeloos
authors.forename: Calix
authors.initials: C
authors.lastname: De Clercq
authors.forename: Reinhilde
authors.initials: R
authors.lastname: Jacobs
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000368:Aged; D000369:Aged, 80 and over; D000539:Alveolar Process / Q000473:pathology / Q000601:surgery; D002858:Chromium Alloys / Q000737:chemistry; D017076:Computer-Aided Design; D059605:Dental Implant-Abutment Design / Q000379:methods; D003764:Dental Materials / Q000737:chemistry; D019094:Dental Prosthesis, Implant-Supported; D003801:Dental Veneers; D003779:Denture Design; D003825:Denture, Complete, Immediate; D003827:Denture, Complete, Upper; D003828:Denture, Overlay; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D057893:Immediate Dental Implant Loading / Q000295:instrumentation / Q000379:methods*; D007575:Jaw, Edentulous / Q000473:pathology* / Q000534:rehabilitation / Q000601:surgery; D008297:Male; D008437:Maxilla / Q000473:pathology* / Q000601:surgery; D008875:Middle Aged; D016348:Osseointegration / Q000502:physiology; D011446:Prospective Studies; D019252:Radiography, Dental, Digital; D014025:Titanium / Q000737:chemistry; D014081:Tooth Extraction / Q000379:methods*; D020390:Tooth Socket / Q000473:pathology / Q000601:surgery; D016896:Treatment Outcome
chemical_list: D000180:Acrylic Resins; D002858:Chromium Alloys; D003764:Dental Materials; D014025:Titanium