A retrospective study by Balshe, et al compared the survival rates of smooth- and rough-surface dental implants. The study retrospectively reviewed patient charts for the time period from January 1, 1991, through December 31, 1996, during which smooth-surface implants were used, and also reviewed the time period from January 1, 2001, through December 31, 2005, during which rough-surface implants were used. The study included all implants placed and restored in one institution during the above 2 time frames. Data that were collected included patient age and gender, implant diameter and length, and anatomic location of the implants. Further, implants from the first time period were followed through mid 1998 and implants from the second time period were followed through mid-2007.
(Source: International Journal of Oral & Maxillofacial Implants, November/December 2009, Volume 24, Issue 6)