Table 2.

The oxygen saturation values of the index finger and tested teeth in previous studies.

	Authors/Year	Index Finger Saturation	Tested Teeth/Saturation (Mean)	Statistically Significant Differences between Tested Teeth
1	B. Anusha et al./2017 [19]	98.4%	Max. and mand. front teeth—94.6%	-
2	Calil et al./2008 [28]	95%	Max. c. incisor—91.29% Max. canine—90.69%	No
3	M.H. Pozzobon et al./2011 [29]	92.85%	Max. front teeth—85.27%	No
4	M. Sadique et al./2013 [30]	95.88%	Max. front teeth—85%	-
5	C. Estrela et al./2017 [27]	92.89%	Max. molars—83.59% Mand molars—86.89%	Yes No
6	C. Estrela et al./2017 [21]	93.7%	Max. premolars—86.2%	-
7	V. Gopi Krishna et al./2006 [24]	97.58%	Max. front teeth—79.59%	No
8	Present study	97.22%	All types of teeth—93.17%	No