Biodegradable system for regenerating the periodontium
Patent 5077049 Issued on December 31, 1991. Estimated Expiration Date: 
July 24, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 24, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMedical putty for tissue augmentation Controlled release drug delivery system for the periodontal pocket Fibrous and cartilaginous tissue replacement Periodontal disease treatment system Patent #: 4919939 InventorsAssigneeApplicationNo. 384416 filed on 07/24/1989US Classes:424/426, Errodable, resorbable, or dissolving424/422, Implant or insert424/423, Surgical implant or material424/425, Diffusion barrier is matrix424/435MouthExaminersPrimary: Page, Thurman K.Assistant: Spear, James M. Attorney, Agent or FirmForeign Patent References
International ClassA61F 002/00AbstractMethods are described for assisting the restoration of periodontal tissue in a periodontal pocket and for retarding migration of epithelial cells along the root surface of a tooth. The methods involve placement of an in-situ forming biodegradable barrier adjacent the surface of a tooth. The barrier is microporous and includes pores of defined size. The barrier can include a biologically active agent. | |
