T. Ringeisen

The use of biodegradable polylactic acid barrier materials in the treatment of grade II periodontal furcation defects in humans--Part II: A multicenter investigative surgical study.

J. Brekke, J. Rapley, H. L. Wang, 1999, The International journal of periodontics & restorative dentistry.

Use of biodegradable polylactic acid barrier materials in the treatment of grade II periodontal furcation defects in humans--Part I: A multicenter investigative clinical study.

J. Brekke, J. Rapley, H. L. Wang, 1998, The International journal of periodontics & restorative dentistry.