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ePaper created 2015-10-15, 17:20:52 | version 1.38.0
news4 ICOI World Congress XXXII HAIFA, Israel: An examination of 100 biologically failed dental im- plants has found that more than 60 per cent of these implants showed signs of mechanical flaws, such as crack-likedefectsandfullcracks.In publicising these results, the re- searchers aim to encourage dental implantmanufacturersanddentists tofindwaystoreducethestructural damage that occurs when a metal is subjecttorepeatedappliedloads. In the study, the researchers exam- ined 100 discarded dental implants, whichhadbeenextractedowingto peri-implantitis, made of a tita- nium alloy and commercially pure titanium using energy dispersive X-ray analysis and scanning elec- tron microscopy. They found me- chanical defects in 62 per cent of the specimens. In addition, the in- spection showed that the pure tita- nium implants had more cracks than did the titanium alloy im- plants. “Embedded particles appear to be linked to the generation of surface defects that evolve into full cracks,” explained Dr Keren Shemtov-Yona, a dental researcher at the Technion—Israel Institute of Technology, who conducted the study as part of her Master of Science degree. Furthermore, the wear and tear of daily use may also contributetowardsthepotentialof manufacturing flaws to develop into cracks and subsequently lead to failure of the material, the re- searchers stated. It was also found thatthewidthandlengthofthedif- ferent implants in this study were not correlated with the observed defects. Shemtov-Yona is now aiming to conduct further studies to inves- tigate the reasons for the devel- opment of cracks to determine whether the causes lie in manufac- turing, use or both. The study, titled “On the me- chanical integrity of retrieved dental implants”, was published in the September issue Journal of the MechanicalBehaviorofBiomedical Materials. TECHNICIANS & CDTs PRACTICE OWNERS & MANAGERS DENTAL NURSESDENTISTS DENTAL HYGIENISTS & THERAPISTS NOT JUST ALL MOUTH. FIND A UK DEALER MAJOR EXHIBITION EXHIBITOR SATISFACTION MEET BUYERS PRODUCT LAUNCHES INTERNATIONAL PACKAGES The only event where you can reach all sectors of the UK dental market. For more information call +44(0)20 7348 5270 or email dentistry@closerstillmedia.com BOOKYOURSTAND AD New study suggests many dental implants may be prone to fracture by DTI Dr Keren Shemtov-Yona (© Technion—Israel Institute of Technology) Scanning electron micrographs show vari- ous locations along the implant’s thread used to fix it into the jawbone (A & B). C and D are magnifications of these locations. (Images: Technion—Israel Institute of Technology) +44(0)2073485270 or