Objective To investigate the molecular mechanism of age-related effects on periodontal tissue turnover, we examined osteoprotegerin (OPG) mRNA expression in young and aged rat periodontal tissues.

• 目的 比较幼年鼠和成年鼠牙周组织骨保护素(Osteoprotegerin,OPG)信使RNA(mRNA)表达的不同,以探讨增龄因素影响牙周组织改建的分子机制。