# Dental Hydrogels with Essential Oils with Potential Activity in Periodontitis
## 2 Results and Discussion
### GC-MS Analysis of Gels Containing Essential Oils
The volatile compounds recovered from the composition are listed in Table 1.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & & & **O \%** & **T \%** & **F \%** \\ \cline{3-6}
**Compounds** & **RT** & **LRI** & **Mean/SD** & **Mean/SD** & **Mean/SD** \\ \hline \(\alpha\)-Thujene (MH) & 12.398 & 936 & 0.21 \(\pm\) 0.02 & 0.00 \(\pm\) 0.00 & 5.53 \(\pm\) 0.55 \\ \(\alpha\)-Pinene (MH) & 12.658 & 943 & 0.24 \(\pm\) 0.02 & 1.35 \(\pm\) 0.01 & 49.79 \(\pm\) 0.00 \\ \(\mathrm{Campene}\) & 13.308 & 960 & 0.00 \(\pm\) 0.00 & 0.22 \(\pm\) 0.00 & 0.81 \(\pm\) 0.04 \\ \(\beta\)-Phellandrene (MH) & 14.106 & 981 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 4.03 \(\pm\) 0.30 \\ \(\beta\)-Pinene (MH) & 14.240 & 985 & 0.25 \(\pm\) 0.02 & 0.26 \(\pm\) 0.00 & 1.30 \(\pm\) 0.02 \\ \(\beta\)-Myrcene (MH) & 14.470 & 991 & 0.29 \(\pm\) 0.05 & 2.20 \(\pm\) 0.04 & 3.88 \(\pm\) 0.12 \\ \(\alpha\)-Phellandrene (MH) & 15.211 & 1024 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 2.44 \(\pm\) 0.03 \\ \(\mathrm{D}\)-Limonene & 15.987 & 1070 & 0.00 \(\pm\) 0.00 & 16.85 \(\pm\) 0.29 & 20.55 \(\pm\) 0.29 \\ \(\mathrm{p}\)-Cymene (MH) & 16.013 & 1071 & 4.22 \(\pm\) 0.65 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 \\ \(\mathrm{Eucalypt}\) (OM) & 16.161 & 1080 & 0.70 \(\pm\) 0.10 & 13.80 \(\pm\) 0.36 & 0.54 \(\pm\) 0.02 \\ \(\gamma\)-Terpinene (MH) & 16.885 & 1124 & 1.53 \(\pm\) 0.20 & 1.30 \(\pm\) 0.04 & 0.00 \(\pm\) 0.00 \\ \(\mathrm{Linalool}\) (OM) & 18.308 & 1204 & 1.15 \(\pm\) 0.07 & 0.41 \(\pm\) 0.02 & 0.00 \(\pm\) 0.00 \\ \(\mathrm{Trans}\)-Verbenol & 20.132 & 1246 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 0.35 \(\pm\) 0.04 \\ \(\mathrm{Campbor}\) (OM) & 20.245 & 1249 & 0.26 \(\pm\) 0.00 & 0.54 \(\pm\) 0.02 & 0.00 \(\pm\) 0.00 \\ endo-Borned (OM) & 20.851 & 1263 & 0.26 \(\pm\) 0.04 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 \\ Terpinen-4-ol (OM) & 21.077 & 1268 & 0.29 \(\pm\) 0.03 & 0.08\(\pm\) 0.06 & 0.33 \(\pm\) 0.12 \\ Methoxydecine (Et) & 21.467 & 1277 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 \\ \(\alpha\)-Terpineol (OM) & 21.588 & 1280 & 0.38 \(\pm\) 0.03 & 0.74 \(\pm\) 0.03 & 0.24 \(\pm\) 0.03 \\ Methyl carvacrol (OM) & 22.482 & 1301 & 0.08 \(\pm\) 0.06 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 \\ Citral (OM) & 23.583 & 1348 & 0.00 \(\pm\) 0.00 & 0.23 \(\pm\) 0.03 & 0.00 \(\pm\) 0.00 \\ Bornyl acetate & 23.674 & 1351 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 0.28 \(\pm\) 0.01 \\ Thymol (OM) & 24.272 & 1377 & 1.21 \(\pm\) 0.10 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 \\ Cinnamaldehyde (Ald) & 24.636 & 1392 & 0.00 \(\pm\) 0.00 & 8.99 \(\pm\) 0.26 & 0.00 \(\pm\) 0.00 \\ Carvacrol (OM) & 24.710 & 1395 & 86.65 \(\pm\) 1.74 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 \\ \(\alpha\)-Copaene (SH) & 25.294 & 1398 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 \\ \(\beta\)-Bourbonene & 26.175 & 1399 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 0.07 \(\pm\) 0.10 \\ Eugenol (OI) & 26.253 & 1403 & 0.04 \(\pm\) 0.05 & 42.30 \(\pm\) 0.49 & 0.00 \(\pm\) 0.00 \\ \(\beta\)-Elemene (SH) & 26.366 & 1409 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 0.72 \(\pm\) 0.02 \\ \(\mathrm{Carophyllene}\) (SH) & 27.255 & 1456 & 1.32\(\pm\) 0.15 & 4.00 \(\pm\) 0.17 & 3.12 \(\pm\) 0.08 \\ Humulene (SH) & 28.247 & 1509 & 0.23 \(\pm\) 0.02 & 0.38 \(\pm\) 0.01 & 0.49 \(\pm\) 0.01 \\ \(\gamma\)-Munrolene (SH) & 28.642 & 1512 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 0.29 \(\pm\) 0.02 \\ Cinnamyl acetate (Ac) & 28.655 & 1513 & 0.00 \(\pm\) 0.00 & 0.35 \(\pm\) 0.02 & 0.00 \(\pm\) 0.00 \\ Germacrene D & 28.907 & 1526 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 0.41 \(\pm\) 0.01 \\ \(\alpha\)-Selinene (SH) & 29.148 & 1530 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 0.25 \(\pm\) 0.16 \\ Bicyclosesquiphellandrene & 29.206 & 1532 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 0.27 \(\pm\) 0.07 \\ \(\beta\)-Bisabolene (SH) & 29.236 & 1533 & 0.00 \(\pm\) 0.00 & 0.20 \(\pm\) 0.09 & 0.00 \(\pm\) 0.00 \\ \(\beta\)-Cadinene (SH) & 29.633 & 1540 & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 & 1.39 \(\pm\) 0.11 \\ Trans-isoeugenol (OI) & 30.294 & 1588 & 0.00 \(\pm\) 0.00 & 4.72 \(\pm\) 0.12 & 0.00 \(\pm\) 0.00 \\ Caryophyllene oxide (OS) & 31.789 & 1598 & 0.22 \(\pm\) 0.04 & 0.32 \(\pm\)The experimental gels contained, as shown in Table 1, a mixture of essential oils (Thieves(r)--T), Frankincense(r) essential oil (F), and Oregon(r) essential oil.