This study examined the effects of applying a 40% chlorhexidine varnish on dental plaque. 40 volunteers participated in a clinical trial where their plaque levels, gingival bleeding, and bacterial colony counts were measured after applying the varnish or not applying anything. The results showed that applying the chlorhexidine varnish significantly decreased plaque levels and gingival bleeding in volunteers with poor oral hygiene. It also reduced the frequency of high bacterial colony counts. The varnish was most effective at reducing plaque for patients with high baseline plaque levels. Regular application of chlorhexidine varnish can be an effective way to reduce caries risk for patients with poor oral hygiene.

1. 폴리클 5조 38번 유고은
Clinical and microbiological
effects of local chlorhexidine
applications

2. Introduction & Aim
 Chlorhexidine(CHX) is regarded as an effective locally
applied antimicrobial
 The most suitable forms for application : varnish
applied in interproximal, cervical, fissure
 Aim : To study the effects of an application of
chlorhexidine varnish(40%) on dental plaque

3. Materials and methods
• 40 volunteers (20male/20female), 25~35 years of age
• API (Approximal plaque-index)
• Test group : CHX
Control group : no CHX
• Ramfjord teeth
• The number of colony unit : CFU
0: no CFU
1: 1-10 CFU
2: 11-100 CFU
3: more than 100 CFU

4. Materials and methods
Clinical trial was carried out three sessions

5. Results 1. Basic data

6. 2. Plaque-index (Quigley-Hein)
A
B
C
D

7. 3. Sulcus-bleeding index (SBI)

8. 4. The Dentocult® SM test

9. Results
 CHX application significantly decreases plaque values in
volunteers with poor oral hygiene
 Effect of a CHX varnish on sulcus-bleeding index
→ considerable decrease was noted in group C
 CHX application reduced the frequently of high CFU
scores

10. Discussion
 Low plaque-accumulation test group :
slightly lowered following the application of CHX
 High plaque-accumulation test group :
when underwent CHX application,
considerable reduction of the plaque-index

11. Discussion
 under clinical conditions with good dental hygiene:
NOT required in the repertoire of preventive measures
 high plaque-accumulation patients:
application of a chlorhexidine-varnish is very effective
method to reduce the main risk-factor for the
emergence of caries
 Compliance is required primarily to reduce the caries
incidence of high-risk subjects