Computer-aided three-dimensional assessment of periodontal healing distal to the mandibular second molar after coronectomy of the mandibular third molar: a prospective study

Table 2 Correlation analyses of previously reported and coronectomy-related factors

			M3M condition			M2M condition		Coronectomy-related factors
		Age	P&G‘s depth of impaction	Angulation of M3M	RMS	DBD depth at BL	ERR	Enamel remains	Root migration	Root rotation	Total volume of bone regenerated in tooth socket	Thickness of calcification bridge above root section
DBD depth reduction	r	−0.23	0.20	0.37	−0.36	0.59	−0.08	− 0.03	0.01	0.19	−0.01	0.27
DBD depth reduction	P-value	0.001	0.003	0.000	0.000	0.000	NS	NS	NS	0.005	NS	0.000
PD reduction	r	−0.09	0.07	0.28	−0.26	0.17	−0.01	− 0.06	0.02	0.06	−0.03	0.30
PD reduction	P-value	0.187	0.309	0.000	0.000	0.014	NS	NS	NS	NS	NS	0.000
Volume of bone regenerated in distal 2 mm	r	−0.21	0.28	0.43	−0.44	0.42	−0.04	− 0.02	0.09	0.24	0.20	0.25
Volume of bone regenerated in distal 2 mm	P-value	0.002	0.000	0.000	0.000	0.000	NS	NS	NS	0.000	0.004	0.000

DBD Distal intra-bony defect, RMS Retromolar space, ERR External root resorption, r correlation coefficient; “NS” denotes “no significant difference”

ISSN: 1472-6831