Table 2.

Features of the Root Morphologies and Alveolar Bone Loss Measurements

		n	%	Minimum	Maximum	Mean	SD	M
Presence of concavity	No	0	0
	Yes	200	100
Origin of the concavity	Cervical third of the crown	71	35.5
	Cervical third of the root	117	58.5
	Middle third of the root	7	3.5
	Apical third of the root	0	0
	Middle third of the crown	5	2.5
Depth of the concavity (mm)				0.2	2.09	0.96	0.37	1
Buccolingual length (mm)				1.71	6.4	4.32	0.89	4.23
Distance from CEJ on the crown (mm)				0	3.9	0.54	0.82	0
Distance from CEJ on the root (mm)				1.22	12.46	7.21	2.06	7
Apicocoronal length (mm)				1.22	14.69	7.75	2.25	7.8
Amount of bone loss (BL) (CBCT)	0	92	46
	< 25%	49	24.5
	25-50%	41	20.5
	> 50%	18	9
Amount of bone loss (BL) (Panoramic radiograph)	0	99	49.5
	< 25%	46	23
	25-50%	40	20
	> 50%	15	7.5
Location of furcation	0	93	46.5
	Cervical Third	2	1
	Middle Third	42	21
	Apical Third	63	31.5
Number of roots	Single Root	93	46.5
	Double Root	107	53.5
Buccal root length (mm)				7.22	17.6	13.45	1.71	13.61
Palatinal root length (mm)				7.77	15.88	12.56	1.71	12.61
Buccopalatinally cervical root width (mm)				6.2	9.8	8.23	0.73	8.4

n, number; SD, standard deviation; M, median