[Absence of (jaw)bone may be indicative of malignancy].

Following the loss of several molars in the left maxilla, a 73-year-old man asked his general dentist practitioner to restore his chewing efficiency. Initially, reconstruction of the left maxilla with an implant supported fixed partial denture was considered. However, intraorally a soft-tissue swelling was observed extending from the midline of the palate to the left buccal sulcus.

[Implant-retained overdentures compared with complete dentures with or without preprosthetic surgery. Satisfaction and subjective chewing capabilities].

The aim of this prospective randomized clinical trial was to evaluate and compare a set of clinical items and satisfaction of a group of edentulous patients during a 5-year follow-up. They were treated according to one of the following modalities: 61 patients with a mandibular overdenture on two implants (IMP-group), 60 patients with a conventional complete denture (VP-group) and 28 patients with a complete denture after preprosthetic surgery (MVP-group). It can be concluded that endosseous implants, serving as retention for a mandibular overdenture, have a high survival rate after 5 years of follow-up (93%).

[Overdenture prostheses on implants versus complete dentures].

Objective: To establish the treatment outcome of implant retained overdentures (IRD) versus complete dentures (CD) in which the outcome assessment focuses on the patient's subjective evaluation ('denture-satisfaction and chewing ability').

Design: A multicenter randomized clinical trial (prospective).

Setting: The department of Oral Function and Prosthetic Dentistry of the University of Nijmegen, the department of Oral and Maxillofacial Surgery of the University Hospital Nijmegen and the department of Oral and Maxillofacial Surgery and Maxillofacial Prosthodontics of the University Hospital Groningen.

[Comparison of dental implant systems for mandibular overdentures].

Objective: To compare three implant systems in patients with severely resorbed mandibles 1 year after insertion of the mandibular denture.

Design: A prospective multicenter randomized clinical trial.

Setting: Centers at University of Nijmegen and Groningen.

Five years of aftercare of implant-retained mandibular overdentures and conventional dentures.

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.