A RANDOMIZED, CONTROLLED CLINICAL TRIAL OF LATERAL RIDGE AUGMENTATION USING AUTOGENOUS BONE BLOCKS OR XENOGENIC BONE BLOCK GRAFTS LOADED WITH RECOMBINANT HUMAN BONE MORPHOGENIC PROTEIN-2)
by Stefan P. Bienz (Switzerland), Ronald E. Jung, Michael Payer, Christoph H. F. Hämmerle, Norbert Jakse, Daniel S. Thoma

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Objectives: Recent studies using PCR and RT -PCR analysis has verified that the internal structures of implants and abutmant are heavily contaminated with pathogenic bacteria. The purpose of this study and topographic characterization of the internal spaces (Endoimplanto) of the implants using 2D and 3D computed microtomography. Methods: Six implants Biomet External hexagon cylindrical implants with tapered apex (3.75.0 x 11.5 mm Pi-Brånemark, EXOPRO, Bauru, Brazil) were used to test. Inner structure of implants and abutmant was divided into 4 zones: Endoimplanto/UCLA, Endoimplanto/Abutment, Endoimplanto/Microgap, EndoImplanto/Implants. All micro-CT scans were acquired on a Triumph multi-modality system (Gamma Medica, Northridge, CA) using the following acquisition parameters: tube voltage 80 kVp, tube current 250 A, detector pixel size 50 m, focal spot size 50 m and a field-of-view of 59 or 93 mm. The spatial resolution was 39 m and 28 m, and the radiation dose was 8.3 cGy and 19.7 cGy for a field-of-view of 93 mm and 59 mm, respectively. Results: The results showed that the endoimplanto abutment/UCLA corresponds to 40/50%, Endoimplanto/Abutment 10-20% , Endoimplanto/Microgap 2-3 %, Endoimplanto/Implant 10 -15 % of full structucture implant/Abutment /UCLA. Conclusion: It concludes that the empty spaces of the implants (Endoimplanto ) occupy a large part of the overall volume Implant /Abutment /UCLA. This space can serve as a repository of relevant bacteria and fungi in the development of periodontal and peri-implant disease. The microtomography and a good non -destructive and non-invasive method to search the internal structures of the implants.
Details
Osteology
Content Type:
Poster
Publication date:
10/02/2016
Publisher:
Osteology