The study analysed X-rays of over 600 patients. The more implants a patient had in the jaw, the more common it was to find loss of supporting bone. Just over a quarter - 28 per cent - of patients had lost some degree of supporting bone around their implants.
"Contrary to what we had previously assumed, the bone loss in these patients was not linear, but instead accelerated with time," says consultant dental surgeon Christer Fransson, who wrote the thesis. "This is a new discovery that shows just how important it is to detect and treat bone loss around implants at an early stage."Smoking is one of several factors that increase the risk of bone loss. In the study smokers had more implants with bone loss than non-smokers.
The thesis also shows that the soft tissues surrounding an implant with bone loss is often inflamed.
"It's important to examine the tissues around implants in the same way as we examine the tissues around teeth," says Fransson. "In that way we can notice early signs of inflammation and treat it before the bone loss has any serious consequences."DENTAL IMPLANTS
Thesis for the degree of Doctor of Philosophy (Odontology) at the Department of Periodontology, Institute of Odontology, Sahlgrenska AcademyTitle of thesis: Prevalence, extent and severity of peri-implantitis
II. Fransson, C., Wennström, J., Berglundh, T. (2008) Clinical characteristics at implants with a history of progressive bone loss. Clinical Oral Implants Research 19: 142-147.
III. Fransson, C., Wennström, J., Tomasi, C., Berglundh, T. (2009) Extent of peri-implantitis-associated bone loss. Journal of Clinical Periodontology 36: 357-363.
Helena Aaberg | idw
Water forms 'spine of hydration' around DNA, group finds
26.05.2017 | Cornell University
How herpesviruses win the footrace against the immune system
26.05.2017 | Helmholtz-Zentrum für Infektionsforschung
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
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Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
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We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
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