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  • Küçük Resim
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    Allogenic versus Autogenous Bone Rings in Dental Implant Surgery: Guidance of Stress Analysis-Part II
    (Amer Scientific Publishers, 2018) Ozgul, Ozkan; Altay, Berkan; Atil, Fethi; Onder, M. Ercument; Tekin, Umut; Yilmaz, Seda; Kocyigit, Ismail Doruk
    Objective The aim of this study is to compare the stress distribution along the alveolar bone following the allogenic and autogenous bone ring assisted immediate dental implant surgery using three dimensional finite element analyses Material and Methods Finite element models of maxilla and mandible that augmented with autogenous and allogenic bone ring graft with dental implant were created Vertical force of 100 N and oblique force of 100 N at 45(degrees) angle were applied to root formed design dental implant and abutment Results The highest calculated values of VonMisses (VM) stresses were observed in oblique loaded mandible model which augmented with allogenic graft In all models the highest VM stress values were greater for oblique loading compare to vertical loadings Allogenic bone ring grafts contribute the stresses more evenly through the implant, as for the autogenous grafts stresses are concentrated in the neck area of the implant Discussion Allogenic and autogenous grafts applied with implant placement create different stress distributions Stress distributions should be considered when choosing type of biomaterial.
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    Öğe
    Outcome of Thrombotic Thrombocytopenic Purpura Patients: A Single-Center Experience
    (Galenos Yayincilik, 2019) Ceneli, Ozcan; Yilmaz, Seda; Karaselek, Mehmet Ali; Camli, Kazim
    [Abstract No tAvailable]
  • Küçük Resim
    Öğe
    Stress Analysis of Zygomatic Implants on the Augmented Maxillary Sinus: Is It Necessary to Graft?
    (Lippincott Williams & Wilkins, 2017) Kaman, Suleyman; Atil, Fethi; Tekin, Umut; Ozgul, Ozkan; Onder, Mustafa Ercument; Yilmaz, Seda; Kocyigit, Ismail Doruk
    Purpose: Zygomatic implants are becoming an ideal therapy with advanced implant-supported prosthetic treatment for the posterior atrophic maxilla. The purpose of this study is to examine the quantity and distribution of stress, which was caused by zygomatic implants placed using intrasinus method with or without augmentation to the atrophic posterior maxilla. Materials & Methods: In this study, 3-dimensional atrophic edentulous maxilla models with and without sinus augmentation are designed with computer-aided programs. Stress analysis was carried out on the created computer models for maxillary alveolar cortical bone, for cortical bone in the zygomaticomaxillary suture, and for zygomatic spongy bone at the apex of the zygomatic implant and for metal substructure of Von Misses stress data. Results: Having augmented the maxillary sinus with graft, it was observed that after the loading especially in the posterior region, the tensile and compressive stresses on the alveolar crest was distributed more homogeneously and the stress generated on the cortical bone was reduced through the graft. Conclusion: Although zygomatic implants are graftless solutions for athrophic maxilla, sinus augmentation will be useful for bearing stress around the implants.