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

Table 2

Medians (first/third quartiles) of the oxygen saturation levels measured at different periods of reading (before and after the first, second, and third bleaching session and at the final, that is, 1 week after the third session) for the different whiteners used: Whitegold Office 35% (WGO) and Whiteness HP Auto Mixx 35% (WHP).

Groups (n = 56); 14 patients	Finger^ϯ	Before 1^st	After 1^st	Before 2^nd	After 2^nd	Before 3^rd	After 3^rd	Final
WGO	98 (97/98)^aA	97.3 (96.9/97.9)^aA	97.8 (97.1/98.8)^aA	98 (97.2/98.5)^aA	97.6 (96/98.3)^aA	97.5 (96.6/99)^aA	98 (98/99.2)^aA	98.1 (97.2/99)^aA
WHP	98 (97/98)^aA	98 (96.5/98.8)^aA	97.6 (96.6/98.3)^aA	98.1 (97.6/98.7)^aA	98.1 (97.1/98.6)^aA	98.1 (97.6/99.3)^aA	97 (96/98.2)^aB	97 (96.9/98) ^aA

Medians accompanied by the same superscript lowercase letters in the same line did not show a significant difference (Friedman, ). Medians accompanied by the same superscript capitalized letters in the same column did not show a significant difference (Mann–Whitney U, ). ^ϯSpO₂ values measured on the patient’s finger.