WALTHAM, Mass.--(BUSINESS WIRE)--“Follow-up research among patients consistently shows a marginal bone level reduction of just 0.4 mm or less for Astra Tech dental implants, a performance indicator at least three times superior to the industry norm. The findings involve hundreds of individual cases and are remarkable in their consistency,” says Lyndon Cooper, Professor of Dentistry in the Department of Prosthodontics at the University of North Carolina, who has performed one of the studies.