Abstract
Purpose To investigate the 10-year survival and complication rates of Morse taper connection implants (MTCIs) placed in grafted sinuses. Methods This study reports on patients treated with maxillary sinus augmentation (with the lateral window technique (LWT) or the transalveolar osteotomy technique (TOT)) and installed with MTCIs supporting fixed restorations (single crowns (SCs) and fixed partial dentures (FPDs)), in two dental clinics. The outcomes of the study were the 10-year implant survival and complication rates. Results Sixty-five patients (30 males and 35 females) with a mean age of 62.7 (±10.2) years were installed with 142 MTCIs: 79 fixtures were inserted with the LWT and 63 were placed with the TOT. After ten years, five implants failed, for an overall survival rate of 96.5%. Three implants failed in the LWT group, for a survival rate of 96.3%; two implants failed in the TOT group, for a survival rate of 96.9%. The 10-year incidence of biologic complications was 11.9%. Prosthetic complications were all technical in nature and amounted to 7.6%. Conclusions MTCIs seem to represent a successful procedure for the prosthetic restoration of the grafted posterior maxilla, in the long term. This study was registered in the ISRCTN registry with number ISRCTN30772506.
Highlights
In the posterior maxilla, sinus pneumatisation with ageing [1] and postextraction alveolar crest resorption [2] can severely affect the amount of bone volume, jeopardizing a successful osseointegration, unless a reconstructive osseous surgery is performed to sustain a functional and aesthetic implantsupported restoration [3].Currently, bone volume increase in the posterior maxilla is mainly obtained by maxillary sinus floor augmentation [4,5,6]
We conducted a retrospective clinical study on patients that have been treated with maxillary sinus augmentation and with fixed prosthetic restorations (SCs and FPDs) supported by Morse taper connection implants (MTCIs), in the period from January 2003 to August 2006, in two private dental clinics
We have evaluated the 10-year implant survival and complication rates of MTCIs placed in grafted sinuses using two different surgical techniques
Summary
Bone volume increase in the posterior maxilla is mainly obtained by maxillary sinus floor augmentation [4,5,6]. This surgical procedure was found to be reliable and it can be performed according to two major techniques: the lateral window approach [7], which is still the most common method, and the transalveolar osteotomy technique [8, 9]. The one-stage approach consists of simultaneous implant placement into the augmented sinus graft [14], while the two-stage method involves implant insertion secondary to reconsolidation of the bone graft [15]. Morse taper connection implants (MTCIs) represent a valid treatment option for restoring partially and completely edentulous patients, as demonstrated by several long-term follow-up studies [16,17,18,19]
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