Table 6.

Comparison of the monoclinic content (vol%) in various zirconia materials after hydrothermal aging with other studies.

			0 h	5 h	12 h	50 h	100 h	150 h	200 h
Putra 2017[13]	UTML		0.4	1.1	-	2.4	1.4	-	-
	STML		1.7	2.2	-	8.5	8.1	-	-
Flinn 2017[12]	ML		< 5	< 5	-	11	35	32	35
This Study	UTML	Enamel	0	-	< 1	-	-	-	-
		Dentin	0	-	< 1	-	-	-	-
	STML	Enamel	0	-	< 1	-	-	-	-
		Dentin	0	-	< 1	-	-	-	-
	ML	Enamel	0	-	11.5	-	-	-	-
		Dentin	0	-	18.0	-	-	-	-

Both Putra[13] and Flinn[12] performed the LTD experiments at 134°C, whereas the current study was conducted at 120°C.