Oral implants with different thread designs. A histometrical evaluation
| 1044 Oral implants with different thread designs. A histometrical evaluation | ||
| G.E. ROMANOS1, M. DAMOURAS2, A. VEIS3, F. SCHWARZ4, and N. PARISIS3, 1New York University, USA, 2Dental School Frankfurt, Germany, 3University of Thessaloniki, Greece, 4University of Düsseldorf, Germany
Primary stability of oral implants is an important criterion for the long-term success. Bone-to-implant contact (BIC) % may determine the osseointegration based on light microscopical examination. Objectives: The aim of this study was to find out the BIC and bone volume (in %) at the coronal (BVc) and apical (BVa) of surrounding trabecular bone in different implant systems with various thread designs immediately after their insertion. Methods: 5 implants of each one of the following implant systems with comparable sizes (11.00/3.5mm, progressive threads-Ankylos(A), thread cylinder-Frialit-2(F) and condensation threads-XiVE(X); 13.00/3.5 mm diameter for Replace (R) Select tapered) were inserted in rip bone of freshly slaughtered cows. The implants were placed using the exact surgical protocol suggested by the manufacturer. Immediately after surgery, the implants with the surrounded bone tissues were examined histologically and histomorphometrically using a grinding technique (Donath and Breuner, 1982). Results: The histomorphometrical evaluation (Mann-Whitney test) presented significantly better results in the BIC (A/F, A/R, A/X), the BVa (F/A, X/A) and the BVc (X/A, X/R, X/F). Implant BIC% BVc BVa Ankylos 37.00 ± 13.08 22.00 ± 5.45 17.00 ± 4.84 (n=11) Frialit-2 19.00 ± 8.62 26.00 ± 3.75 23.00 ± 5.42 (n=11) XiVE 22.16 ± 3.70 34.50 ± 6.20 22.50 ± 4.73 (n=5) Replace Select Tapered 24.40 ± 7.86 22.80 ± 6.86 18.22 ± 6.30 (n=10) Based on these data only the primary BIC% of the tested implant systems seems to be dependent on the thread design. Conclusions: We concluded that the special progressive and condensation macrodesigns present significantly higher primary stability than other implant thread geometries. | ||
| Seq #119 - Imaging and Histological Analysis 3:30 PM-4:45 PM, Thursday, March 22, 2007 Ernest N. Morial Convention Center Exhibit Hall I2-J | ||
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