Chlorhexidine: Possible Prevention of Plaque Biofilm on Healing Abutment

A study by Bressan et al evaluated the effect of chlorhexidine (CHX) in preventing plaque biofilm (PB) formation on healing abutments (HAs) in patients rehabilitated with osseointegrated implants. The researchers published their evidence-based clinical article in a recent issue of Implant Dentistry.

The study involved a test group of 50 HAs that were placed in 34 voluntary patients one week after implant surgery. After 7 days, a control group was established with a new set of 50 HAs placed in the same implant sites and removed one week later. During the 2 testing periods, the test group patients were instructed to apply CHX by mouth rinsing twice daily and no tooth brushing, while the control group patients were instructed to use no CHX mouth rinsing and no tooth brushing. Scanning electron microscopy and image analysis were blindly used to objectively quantify PB amount on removed HAs. The study found that median values and interquartile ranges of the percent ratio of titanium surface covered from PB were 0.9 (0.1 to 4.1) and 1.2 (0.1 to 11.6) for test and control groups, respectively (p = 0.0275). Based on these findings, the researchers conclude that CHX mouth rinsing significantly limited plaque formation on HAs and is a valid contribution to mechanical brushing in early phases of plaque control on dental implants.

(Source: Implant Dentistry, February 2014, Volume 23, Issue 1)