Download or read book Ten-year Results of Tapered Implants Supporting Single-tooth Or Fixed Partial Dentures written by Stefano Corbella and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: BackgroundDespite dental implants being widely used in clinical practice, there is a relative lack of information about medium- and long-term outcomes of implant-supported rehabilitations, particularly with respect to tapered implants and trends in bone resorption rates.AimThe aim of this extension study, recalling patients from a prospective single-center investigation, was to evaluate the ten-year clinical outcomes of single-tooth and partial rehabilitations supported by tapered implants.Materials and methodsIn this single-center study, the patient inclusion criteria were classification as healthy or having mild systemic disease (ASA-1 or ASA-2), one or more teeth missing, adequate oral hygiene level, healthy periodontium, and smoking less than ten cigarettes a day. All patients fulfilling the criteria were treated between June 2005 and March 2006 with tapered implants (Replace Select Tapered, Nobel Biocare), using either a one- or two-stage protocol. Bone quality (Lekholm and Zarb) was assessed at implant insertion on implant level. Patients were recalled every six months for the first 3 years and then annually. Mean marginal bone resorption (MBR; mean of mesial/distal measures from paired periapical radiograph, being the time of prosthetic placement the baseline), and occurrence of complications were recorded. Cumulative success and survival rates on implant level were determined by life table analysis. Unpaired student t-test was used to assess the significance of differences in MBRs.ResultsA total of 19 patients (6 male, 13 female; mean age 64.60u00b18.59 years) received 53 tapered implants supporting 30 prosthetic rehabilitations comprising 13 single crown restorations and 17 fixed partial dentures (FPDs). Prosthetic rehabilitation was done at 4.2u00b10.6 months (range 3.0-4.8 months) after surgery, and all patients were followed for 10 years from loading. Three implants failed due to peri-implantitis (one each after 2, 6 and 8 years from loading) and were removed, giving a cumulative survival rate of 95.4% and a cumulative success rate of 88.9% at 10 years after prosthetic loading. The mean MBRs were 0.44u00b10.19 mm, 0.71u00b10.35 mm, and 1.05u00b11.06 mm after 1, 5 and 10 years of loading, respectively. The mean MBR was statistically higher (P=0.02) for implants placed in type 3 bone (n=26) than for those placed in type 2 bone (n=27). Furthermore, the mean MBR for implants supporting FPDs was statistically higher than for single crowns (P=0.03).Conclusions and clinical indicationsTapered dental implants were characterized by a high cumulative survival and success rate, up to 10 years after loading. Low MBR was observed, particularly at implant sites in type 2 bone or supporting single crowns. Within the limitations of this study, this supports the clinical use of tapered implants for long-term single crown and FPD restorations.