Evaluation of the Pulp Oxygen Saturation Reading after Tooth Bleaching: A Randomized Clinical Trial

Table 4

Medians (first/third quartiles) of oxygen saturation levels measured at different periods of reading for the different dental groups.

Evaluation	UCI (n = 28); 14 patients	ULI (n = 28); 14 patients	LCI + LLI (n = 28); 7 patients	UC + LC (n = 28); 7 patients
Before the 1^st session	97.6 (95.6/98.6)^aA	97.5 (96.3/98.9)^aA	97 (96/98)^aA	97.5 (96.7/98.6)^aA
After the 1^st session	98.3 (97.5/99)^abA	98.8 (98.3/99.6)^bAB	98.6 (98/99.6)^abC	97.8 (96.6/98.6)^aA
Before the 2^nd session	98.1 (97/99.3)^aA	98.3 (98/99.3)^aAB	98.3 (97.1/99.2)^aBC	98.1 (97.3/98.6)^aA
After the 2^nd session	98.5 (97.7/99.6)^bcA	98.6 (98.1/99.6)^cAB	97.6 (96.6/98.3)^aAB	98 (96.7/98.6)^abA
Before the 3^rd session	98.6 (98/99.3)^aA	99 (97.7/99.6)^aAB	98.3 (97.3/99.2)^aABC	97.8 (97.3/99)^aA
After the 3^rd session	99 (98/100)^abA	99 (99/100)^bB	98.5 (97/100)^abcBC	98 (97/99)^aA
Final	98.6 (97.5/99.3)^abA	99 (98/99.3)^bAB	98 (97.1/99)^abBC	97.8 (97/98.3)^aA

Medians accompanied by the same superscript lowercase letters in the same line did not show a significant difference (Kruskal–Wallis and adjusted multiple comparisons, ). Medians accompanied by the same superscript capitalized letters in the same column did not show a significant difference (Friedman and adjusted multiple comparisons, . UCI: upper central incisor; ULI: upper lateral incisor; LCI: lower central incisor; LLI: lower lateral incisor; UC: upper canine; LC: lower canine.