A Clinical and Radiographic Evaluation of Zirconia Dental Implants: 10-Year Follow-Up.

Andrea Enrico Borgonovo,Rachele Censi,Susanna Ferrario,Virna Vavassori,Carlo Maiorana,Dino Re,Shinn Jyh Ding

doi:10.1155/2021/7534607

Abstract

Purpose The aim is to evaluate the survival and success rates, as well as the marginal bone loss (MBL) and periodontal indexes, of zirconia implants with 10-year follow-up. Materials and Methods 10 patients were selected and 26 one-piece zirconia implants were used for the rehabilitation of single tooth or partially edentulous ridge. After 10 years, a clinical-radiographic evaluation was performed in order to estimate peri-implant tissue health and marginal bone loss. Results The survival and success rates were 100%. The average marginal bone loss from baseline to 120 months after surgery was 0.92 ± 0.97 mm. Conclusion One-piece zirconia dental implants are characterised by high biocompatibility, low plaque adhesion, and absence of microgap that can be related to the clinical success of these implants.

Highlights

Modern implantology has developed from the studies on bone healing and regeneration conducted in the 1950s and 1960s by the Swedish orthopedic surgeon Branemark et al [1]. e protocol is based on the discovery that titanium can effectively fuse with bone when osteoblasts grow on and within the raw surface of the implanted titanium. is forms a structural and functional link between living bone and the implant, defined as “osseointegration.” After establishing that the use of titanium implants is a safe rehabilitation, several modifications were made to the micro- and macrostructure of the implants in order to improve their physical, mechanical, and optical properties [2,3,4]
Implant System. e implants used in this study are among the first zirconia implants put on the market: they are single-component implants with conical body, double thread, and rounded apex. ese are sintered and yttriumstabilized zirconium oxide implants with an average roughness of 0.9–1 μm (Figure 1)
For the evaluation of radiographic bone resorption and periodontal indexes, 12 patients were selected who needed single or multiple edentulous prosthetic implant rehabilitation in the upper or lower jaw and who were rehabilitated with 29 single-component zirconia implants partially stabilized with yttrium in the period from January 2007 to April 2012

Summary

Introduction

The use of implants for the rehabilitation of single and multiple edentulism is considered an effective and welldocumented treatment.Modern implantology has developed from the studies on bone healing and regeneration conducted in the 1950s and 1960s by the Swedish orthopedic surgeon Branemark et al [1]. e protocol is based on the discovery that titanium can effectively fuse with bone when osteoblasts grow on and within the raw surface of the implanted titanium. is forms a structural and functional link between living bone and the implant, defined as “osseointegration.” After establishing that the use of titanium implants is a safe rehabilitation, several modifications were made to the micro- and macrostructure of the implants in order to improve their physical, mechanical, and optical properties [2,3,4].several disadvantages are represented by the use of a metal alloy inside the tissues. Undesirable allergic reactions (0.6%) [5] have been found for which adequate epicutaneous patch tests are lacking; cell sensitization and galvanic current formation are possible [6]. In addition to these disadvantages, the possible aesthetic failure is due to the grey colouring of titanium, which is evident in thin gingival biotypes. For these reasons, the demand for more aesthetic and biocompatible implant materials has increased over time [5, 7,8,9]

Objectives

Methods

Results