Comparison of the degree of coronal pigmentation in extracted premolars after the application of Bi-antibiotic and Tri-antibiotic pastes.

Pedro Pablo Mejía, María Claudia Monterrsa


Objective: To compare the degree of pigmentation in coronary premolars, extracted after applying Bi-antibiotic and Tri-antibiotic pastas. Methods: Non-probability and intentional sampling. Thirty healthy premolars extracted due to orthodontic reasons, which met the inclusion criteria were selected, comprising: two experimental groups and one control group of 10 teeth each. The group I (G1) was treated with Bi-antibiotic paste, group II (G2) with Tri-antibiotic paste; and group III or control (G3) was treated with saline solution. Two previously calibrated observers, took the initial color of each sample giving its corresponding value according to the shade guide. After the opening and instrumentation, all tooth received the appropriate medication for 30 days, taking color records using the same initial conditions of light. The data were compiled into Excel for descriptive and inferential analysis with SPSS 19.0, ANOVA test with a confidence level of 95% was used. Results: The degree of pigmentation was 1 ±0.9 in G1, 12.2 ±1.2 in G2, and 0.9 ±0.8 in G3. No statistically significant difference between G1 and G3 (p = 0.8086) was found, but there were between G1 and G2 (p <0.001), and G2 and G3 (p <0.001). Conclusion: The degree of pigmentation with Tri-antibiotic paste was superior to the degree of pigmentation of the Bi-antibiotic paste used as a temporary medication. No difference between the degree of pigmentation present in the Bi-antibiotic paste and the control group treated with saline was observed. The Bi-antibiotic paste did not show pigmentation in the crown of the extracted premolars.


Coronal pigmentation; double antibiotic paste; triple antibiotic paste.


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