Article

Prospective evaluation of 2,549 Morse taper connection implants: 1- to 6-year data.

Dental School, University of Varese, Varese, Italy.
Journal of Periodontology (Impact Factor: 2.57). 01/2011; 82(1):52-61. DOI: 10.1902/jop.2010.100243
Source: PubMed

ABSTRACT The aim of this study is to evaluate the implant survival, the implant-crown success, and the prosthetic complications of 2,549 Morse taper interference-fit connection implants.
A total of 2,549 Morse taper connection implants were inserted in 893 patients from January 2003 until December 2008. At each annual recall, clinical, radiographic, and prosthetic parameters were assessed. The implant-crown success criteria included the absence of pain, suppuration, and clinical mobility; an average distance between the implant shoulder and the first visible bone contact <2 mm from initial surgery; and the absence of prosthetic complications at the implant-abutment interface. Prosthetic restorations were fixed partial prostheses (462 units); fixed full-arch prostheses (60 units); single crowns (531 units); and overdentures (93 units).
The cumulative implant survival rate was 98.23% (97.25% maxilla, 99.05% mandible). The implant-crown success was 92.49%. A few prosthetic complications at implant-abutment interface were reported (0.37%). After 6 years, distance between the implant shoulder and the first visible bone contact was 1.10 mm (± 0.30 mm).
The use of Morse taper connection implants represents a successful procedure for the rehabilitation of partially and completely edentulous arches.

5 Followers
 · 
760 Views
  • Source
    • "The success of implant-supported restorations is associated with effective osseointegration of the dental implant, the health of the peri-implant tissue, and the reestablishment of function and aesthetics (Amarante et al., 2008; Faggion et al., 2011; Mangano et al., 2011). Other conditions may be associated with implant failure in specific groups of patients who are systemically compromised, including those suffering from head and neck cancer. "
    [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to assess the survival rate of titanium implants placed in irradiated jaws. MEDLINE, EMBASE, and CENTRAL were searched for studies assessing implants that had been placed in nongrafted sites of irradiated patients. Random effects meta-analyses assessed implant loss in irradiated versus nonirradiated patients and in irradiated patients treated with hyperbaric oxygen (HBO) therapy. Of 1,051 potentially eligible publications, 15 were included. A total of 10,150 implants were assessed in the included studies, and of these, 1,689 (14.3%) had been placed in irradiated jaws. The mean survival rate in the studies ranged from 46.3% to 98.0%. The pooled estimates indicated a significant increase in the risk of implant failure in irradiated patients (risk ratio: 2.74; 95% confidence interval: 1.86, 4.05; p < .00001) and in maxillary sites (risk ratio: 5.96; 95% confidence interval: 2.71, 13.12; p < .00001). Conversely, HBO therapy did not reduce the risk of implant failure (risk ratio: 1.28; 95% confidence interval: 0.19, 8.82; p = .80). Radiotherapy was linked to higher implant failure in the maxilla, and HBO therapy did not improve implant survival. Most included publications reported data on machined implants, and only 3 studies on HBO therapy were included. Overall, implant therapy appears to be a viable treatment option for reestablishing adequate occlusion and masticatory conditions in irradiated patients.
    Journal of dental research 10/2013; 92(S12). DOI:10.1177/0022034513504947 · 4.14 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: In recent times there has been a substantial increase in the cost and complexity of fabricating a VLSI chip. The lithography masks themselves can cost between &epsi; and ≥. It is conjectured that due to these increasing costs, the number of ASIC starts in the last few years has declined. We address this problem by using an array of dynamic PLAs which require only metal and via mask customization in order to implement a new design. This would allow several similar-sized designs to share the same base set of masks (right up to the metal layers) and only have different metal and via masks. We have implemented our methodology for both combinational and sequential designs, and demonstrate that our approach strikes a reasonable compromise between ASIC and field programmable design methodologies in terms of placed-and-routed area and delay. Our method has a 2.89× (3.58×) delay overhead and a 4.96× (3.44×) area overhead compared to standard cells for combinational (sequential) designs.
    2004 International Conference on Computer-Aided Design (ICCAD'04), November 7-11, 2004, San Jose, CA, USA; 01/2004
  • [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this in vitro study was to evaluate the implant-abutment assembly of Astra Tech (AST), Bego (BEG), Camlog (CAM), Friadent (FRI), Nobel Biocare (NOB) and Straumann (STR) with respect to yield force before and after cyclic fatigue, using a static overload test with a test set-up according to ISO 14801. Ten specimens of each type were split into two homogenous groups: one half was tested for static yield force without any further treatment (control), whereas the other one underwent one million cycles of mechanical loading with 100N as the upper load limit. For load-to-failure testing, specimens were then placed in a stainless steel jig and loaded in a universal testing machine under an angle of 30° with respect to the implant axis until failure. Load-displacement curves were analyzed and the yield forces at which non-linear behaviour set in (Fp) were recorded. Statistical analysis was performed using one-way ANOVA and t-test, respectively, with the level of significance set at 0.05. Statistical analysis revealed that the type of implant-abutment connection has a significant influence on Fp (p<0.001). Furthermore, dynamic loading proved to significantly influence Fp of BEG and CAM (p<0.001). None of the implant-abutment types tested would be expected to fail under clinically relevant forces, but the type of implant-abutment connection significantly influences the yield force Fp.
    03/2011; 56(1):19-24. DOI:10.1016/j.jpor.2011.02.002
Show more