CONTENTS Chapter 1 General introduction 9 Chapter 2 Maxillary implant overdentures retained with bars or solitary attachments: a 5-year randomised controlled trial 17 Chapter 3 Utilising the nasal aperture for template stabilisation for guided surgery in the atrophic maxilla 41 Chapter 4 Two or four implants to support a maxillary overdenture in fully edentulous patients: 1-year results of a randomized controlled trial 55 Chapter 5 The performance of two-implant overdentures in the atrophic maxilla: a case series with 1-year follow-up 75 Chapter 6 Incidence of peri-implant mucositis and peri-implantitis in patients with a maxillary overdenture: a sub-analysis of two prospective studies with a 10-year follow-up period 91 Chapter 7 Retreatment of multiple failing maxillary implants after full arch rehabilitation: a retrospective, observational cohort study 105 Chapter 8 General discussion and conclusions 121 Appendices Summary 134 Samenvatting 138 Dankwoord 142 Curriculum vitae 147 List of sponsors 148
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