TY - JOUR AU - Delmondes Freitas Dantas, C. AU - Maeda Reino, D. AU - Pires de Carvalho, J. AU - Novaes Jr., A.B. AU - Taba Jr., M. AU - Bazan Palioto, D. AU - Cândido dos Reis, A. AU - Scombatti de Souza, S.L. PY - 2015/10/30 Y2 - 2024/03/28 TI - Evaluation of standardized porcine bone models to test primary stability of dental implants, using biomechanical tests and Micro-CT. An in vitro pilot study JF - Journal of Osseointegration JA - J Osseointegr VL - 7 IS - 3 SE - Articles DO - 10.23805/jo.2015.07.03.01 UR - https://journalofosseointegration.eu/jo/article/view/4 SP - 43-51 AB - <p><strong>Aim </strong>This study evaluated a new porcine bone model to test the primary stability of different implants, analyzing Micro-CT, insertion torque, and pull-out strength.</p><p><strong>Materials and methods </strong>Bone cylinders were prepared from porcine bone and separated into 2 groups: 10 high density bone cylinders (HDB), and 10 low density bone cylinders (LDB). Then, 3D pre-implant analyses were performed, evaluating tridimensional bone density (ratio of trabecular bone volume and total tomographic volume, BV/TV), trabecular separation; percentage of closed pores; percentage of open pores; percentage of total porosity, in 3 bone levels (L1 bone volume corresponding to the internal part of the threads; L2 corresponding to the area between 0 to 0.5 mm from the end of threads; L3 corresponding to the area between 0.5 to 1.5 mm from the end of threads). Twenty implants of two different macrostructures were inserted in the bone cylinders, and divided into 4 groups (5 implants each): Group 1, e-Fix HE implant placed in HDB cylinder; Group 2, e-Fix HE implant in LDB cylinder; Group 3, e-Fix HE Silver implant placed in HDB cylinder; Group 4, e-Fix HE Silver implant in LDB cylinder. The insertion torque was recorded and bone cylinders were re-evaluated by Micro-CT (post-implant analysis). Then a pull-out strength test was performed.</p><p><strong>Results </strong>3D analysis showed that pre- and post-implants intra-groups evaluation had statistically significant differences in Group 3 and 4, for all  tomographic parameters assessed. Group 3 showed the best values for biomechanical tests (Friedman Test, p&lt;0.05).</p><p><strong>Conclusion</strong> This methodology can produce standardized bone cylinders of high and low bone density, in which different implant designs are able to promote different effects, evidenced by biomechanical and image analysis.</p> ER -