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2 results

  • Structure of multi-functional calcium phosphates/TiO2 layers deposited on NiTi shape-memory alloy

  • Tomasz Goryczka, Karolina Dudek
  • Journal:
    Powder Diffraction / Volume 32 / Issue S1 / September 2017
    Published online by Cambridge University Press:
    17 April 2017, pp. S99-S105

  • The structure of the NiTi matrix covered by multi-layer was studied applying X-ray diffraction techniques supported by electron microscopy. Multi-layer was composed from titanium oxide (passivation) followed by mixture of the hydroxyapatite (HAp) and β-tricalcium phosphate (β-TCP) (electrophoresis). Conditions of deposition as well as sintering did not change the nominal ratio of HAp/TCP and saved their original structure. Also, the passivated NiTi matrix and with HAp/TCP-deposited layer did not change structure. However, sintering, done for HAp/TCP consolidation, introduced local differences in the lattice parameter as well as phase composition of the NiTi matrix. In consequence of that, two-steps martensitic transformation occurred in sintered NiTi/TiO2/Hap–TCP composite.

  • First results of frontal sinus obliteration with a synthetic, resorbable and osteoconductive bone graft of ß-tricalcium phosphate

  • M Andratschke, H Hagedorn
  • Journal:
    The Journal of Laryngology & Otology / Volume 131 / Issue 6 / June 2017
    Published online by Cambridge University Press:
    03 April 2017, pp. 534-540
    Print publication:
    June 2017
  • Background:

    Despite advances in endoscopic sinus surgery, frontal sinus obliteration is still indicated in some cases. Current options for obliteration include autologous and synthetic materials. The use of ß-tricalcium phosphate as a resorbable bone graft substitute is a good alternative for frontal sinus obliteration. This study aimed to report our experience with this material.

    Methods:

    A retrospective chart review of patients who underwent frontal sinus obliteration at our clinic between 2008 and 2013 was performed. Demographic data, indications, previous surgery, and immediate and late complications were examined. Information on persisting symptoms and patient outcomes was collected using a telephone questionnaire in February 2016.

    Results:

    None of the patients underwent further surgery for frontal sinus disease. All of them reported a good cosmetic result and symptom improvement.

    Conclusion:

    ß-tricalcium phosphate is a good, safe and cost-effective material for frontal sinus obliteration.