Received Date: 04 Jan 2008
Revision Received Date: 25 Mar 2008
Electronic Publication Date: 28 Nov 2008
The author extends sincere thanks to the Departments of Periodontics and Prosthodontics, Graduate Institute of Dental Sciences, College of Dental Medicine, Kaohsiung Medical University, Taiwan, for their valuable advises. We also thank Chi Mei Medical Center, Tainan, Taiwan and Kaohsiung Medical University for the grant support.