title: Five years of aftercare of implant-retained mandibular overdentures and conventional dentures.
abstract: The purpose of this multicentre randomized clinical trial was to analyse surgical and prosthetic aftercare and clinical implant performance of edentulous patients with implant-retained mandibular overdentures and of patients with conventional dentures, either or not after pre-prosthetic vestibuloplasty and deepening of the floor of the mouth. The evaluation period was 5 years. The implant systems evaluated were the IMZ implant system, the Brånemark implant system and the Transmandibular Implant system. The centre in Groningen had five groups (n=149) and the centre in Nijmegen had three groups (n=86). The evaluation comprised of surgical and prosthetic aftercare, together with clinical implant performance (CIP). The highest implant loss (29%) is found in the Transmandibular Implant group. All groups had prosthetic revisions and complications according to the CIP-scale. The majority of the patients in the endosseous implant groups were subject to minor complications. The CIP-score of the Transmandibular Implant group is significantly higher than the scores of the other groups, because of the high number of lost posts. In 26;1% of the patients in this group score 4 is given, which means failure of the implant system. From this study it can be concluded that the endosseous implant systems used in this study have less surgical aftercare and a better clinical implant performance than the Transmandibular Implant system and are therefore the systems of choice for the edentulous mandible.
authors.affiliation: Department of Oral-Maxillofacial Surgery and Maxillofacial Prosthodontics, University Hospital Groningen, Groningen, The Netherlands.
authors.forename: A
authors.initials: A
authors.lastname: Visser
authors.forename: M E
authors.initials: ME
authors.lastname: Geertman
authors.forename: H J A
authors.initials: HJ
authors.lastname: Meijer
authors.forename: G M
authors.initials: GM
authors.lastname: Raghoebar
authors.forename: J M
authors.initials: JM
authors.lastname: Kwakman
authors.forename: N H J
authors.initials: NH
authors.lastname: Creugers
authors.forename: R P
authors.initials: RP
authors.lastname: Van Oort
mesh_terms: D000359:Aftercare; D016301:Alveolar Bone Loss / Q000209:etiology / Q000601:surgery; D003758:Dental Implantation, Endosseous; D015921:Dental Implants / Q000009:adverse effects; D017268:Dental Prosthesis Retention; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003826:Denture, Complete, Lower; D003828:Denture, Overlay; D005260:Female; D005881:Gingiva / Q000637:transplantation; D005885:Gingival Hyperplasia / Q000601:surgery; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation; D008297:Male; D008334:Mandible; D019233:Retreatment; D016896:Treatment Outcome; D014727:Vestibuloplasty
chemical_list: D015921:Dental Implants