To systematically review the literature on the role of bruxism as a risk factor for the different complications
on dental implant-supported rehabilitations.
Material and Methods
A systematic search in the National Library
of Medicine's Medline Database was performed to identify all peer-reviewed papers in the English literature assessing the
role of bruxism, as diagnosed with any other diagnostic approach (i.e., clinical assessment, questionnaires, interviews, polysomnography,
and electromyography), as a risk factor for biological (i.e., implant failure, implant mobility, and marginal bone loss) or
mechanical (i.e., complications or failures of either prefabricated components or laboratory-fabricated suprastructures) complications
on dental implant-supported rehabilitations. The selected articles were reviewed according to a structured summary of the
articles in relation to four main issues, viz., "P" - patients/problem/population, "I" - intervention, "C" - comparison, and
"O" - outcome.
A total of 21 papers were included in the review and split into those assessing biological
complications (n = 14) and those reporting mechanical complications (n = 7). In general, the specificity of the literature
for bruxism diagnosis and for the study of the bruxism's effects on dental implants was low. From a biological viewpoint,
bruxism was not related with implant failures in six papers, while results from the remaining eight studies did not allow
drawing conclusions. As for mechanical complications, four of the seven studies yielded a positive relationship with bruxism.
is unlikely to be a risk factor for biological complications around dental implants, while there are some suggestions that
it may be a risk factor for mechanical complications.