The periodontal guided tissue regeneration (GTR) is a new treatment on periodontal disease. Biodegradable GTR Barrier has a compound structure with fabric inside and coating outside.

牙周再生是近年来一种新兴的牙周治疗技术，所用牙周再生片内层为织物，外层为涂层，对其工艺参数的研究尚处于起步阶段。

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A protective coating of colloidal silver is painted on the inside and outside of the filter to kill bacteria.

VOA: special.2009.06.22