By Robert Preidt
"Twice-yearly cleanings have been recommended for over 50 years without supporting evidence," study author William Giannobile, a professor of dentistry and biomedical engineering at the University of Michigan, said in a university news release.
But the results of this study "showed that one yearly cleaning is likely to be enough for patients with no risk factors," he said. "Patients with one or more risk factors, which represent over half of the population, should visit at least twice a year and likely more in some cases."
For the study, which was published online June 10 in the Journal of Dental Research, Giannobile and colleagues looked at data from more than 5,100 adults who visited the dentist regularly for 16 straight years, had no history of gum disease and received one or two cleanings each year.
Two dental cleanings a year provided significant benefits to people with one or more of the three risk factors, while people with two or three of the risk factors may require more than two cleanings a year. But one cleaning per year appears sufficient for people with none of the risk factors, according to the study.
"The future of health care is personalized medicine," Giannobile said. "This study represents an important step toward making it a reality, and in a disease that is widespread, costly and preventable."
"We have long known that some individuals are at greater risk of [gum] disease, but tools haven't been available to adequately identify those at increased risk and prevent disease progression," he said.