Research on the Characteristics of Food Impaction with Tight Proximal Contacts Based on Deep Learning

Table 4

Principal component analysis of impaction and nonimpaction.

Item	Loading coefficient		Communality (common factor variance)
	Principal component 1	Principal component 2
Adjacent line length	0.707	0.111	0.513
Adjacent surface area	0.719	0.069	0.522
Tongue abduction gap angle	0.051	0.596	0.358
Buccal abduction gap angle	-0.168	-0.757	0.601
Occlusal abduction gap angle	-0.650	0.439	0.615

Note: the numbers in the table are overstriking: bold means the absolute loading factor coefficient is greater than 0.4; otherwise is less than 0.4.