The purpose of this study was to evaluate the therapeutic effect of standard extract of the unsaponifiable fraction of Zea Mays L. when administered alone, or combined with oral hygiene instruction, scaling subgingival curettage, and flap operation in advanced periodontits.
This study was carried out on 671 advanced periodontitis sites which had loss of attachment more than 6mm among 53 patients.
Clinical parameters such as probing depth, loss of attachment, bleeding index, and plaque index were recorded on initial examination. During administration of standard extract of the unsaponiflable fraction of Zea Mays L. to experimental group and placebo to control group, 5 types of therapy were performed : (1) no treatment, (2) oral hygiene instruction, (3) scaling, (4) subgingival curettage, and (5) flap operation.
Clinical parameters were recorded on 4,8,12,16 weeks after treatments, and all data were analysed statistically.
The results were as follows.
1. For group 1 (no treatment), there were significant reductions of probing depth and loss of attachment in both experimental and control group, (P<0.05) and there was no significant difference between experimental and control group.
2. For group 2 (oral hygiene instruction), the reduction of all clinical parameters on 4, 8, 12, 16weeks in experimental group is significantly different compared to control group(P<0.05).
3. For group 3 (sealing), there were significant reductions of all clinical parameters in both experimental and control group(P<0.05). The reduction of probing depth and loss of attachment on 12weeks and plague index on 4,8,12 weeks in
experimental group is significantly different compared to Control group(P<0.05).
4. For group 4 (subgingival curettage), there were significant reductions of probing depth, loss of attachment, and bleeding index in both experimental and control group(P<0.05), and there was no significant difference between experimental and control group.
5. For group 5 (flap operation), there were significant reductions of all clinical parameters in both experimental and control group(P<0.75). The reduction of loss of attachment on 4,8 weeks in experimental group is signifcantly different compared to control group(P<0.05).