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The effect of cinnamon bark extract on the dental plaque index of the lingual surfaces of mandibular anterior teeth among selected dental students of Cebu Doctors' University A.Y. 2015-2016.


Zarrah May G. Alegarbes,
Shaira Jane Rhea U. Boiser,
Ma. Viar Kim  R. Bucad,
Vanessa Mae G. Capistrano,
Lynlee Grace  P. Enabe,
AI R. Kakuoka,
Jemaida A. Kulani,
Michelle Elaine C. Paredes,
Jamila Chade M. Patalinjug,
Mohammad Reza Tazik,
Leonila L. Tan

Related Institution

College of Dentistry - Cebu Doctors' University

Publication Information

Publication Type
Thesis Degree
Publication Date
March 2016


This study aimed to determine the effect of cinnamon bark extract on the dental plaque index on the lingual surfaces of the mandibular anterior teeth among selected dental students of Cebu Doctors' University A.Y. 2015-2016. The study used the randomized controlled trial design. The study was conducted in the Dental Infirmary, College of Dentistry, Cebu Doctors' University. Twenty two participants were selected according to a set of inclusion and exclusion criteria. Eleven participants were randomly allocated for the experimental and control groups. The study used the Modified Quigley-Hein to measure the plaque scores which was defined by G.A. Quigley and J.W. Hein and was modified by the researchers.

After gargling with Cinnamon bark extract, the dental plaque index score on the lingual surfaces of mandibular anterior teeth reduced from 5.55mm to 5mm on tooth number 33, from 5.27mm to 4.36mm on tooth number 32, from 4.91mm to 4.09mm on tooth number 31, from 5.45mm to 4.64mm on tooth number 41, from 6.45mm to 5mm on tooth number 42, and from 5.91mm to 5.36mm on tooth number 43. There was no significant difference in the mean plaque index of the pre-test and post-test scores after the treatment in the control and experimental group, though, both the experimental and control groups showed a decline of mean plaque index score on the 5th day. Mann-Whitney test shows the significant mean difference in the plaque index scores of the mandibular anterior teeth between the experimental and control group, the test revealed that tooth number 33 with a p value of .918, tooth number 32 with a p value of .708, tooth number 31 with a p value of .221, tooth number 41 with a p value of .738, and on tooth 43 with a p value of .644 at .05 level of significance, therefore not rejecting the null hypothesis. This means that the cinnamon oil and 0.12% Chlorhexidine digluconate were comparatively effective due to its minimal mean difference between the experimental and control group.

Based on the findings, the researchers concluded that cinnamon oil is effective in reducing the dental plaque index on the lingual surfaces of the mandibular anterior teeth of selected dental students. Cinnamon bark extract is comparatively effective as 0.12% Chlorhexidine Gluconate when used to reduce the dental plaque index. The researchers would like to recommend using the results of the study as source of added literature and background regarding cinnamon oil for conducting further studies about its effects on the dental plaque index.As the study was based on a 5-day experimental period, further researchers are encouraged to conduct studies that cover a longer timeframe comparing the results of the same experiment in which it would be precisely tested. Second, as the study used Soxhlet method in extracting oil from cinnamon bark, further researchers are encouraged to use steam distillation method. Lastly, the study aimed to decrease the plaque index of the lingual surfaces of the mandibular anterior teeth; the researchers suggest using maxillary first or second molar.


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Cebu Doctors' University - Main Library U3 Ef36ale 2016 Fulltext Print Format

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