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 1 Variation in the PD and DBD depth between BL and Po.6 m and difference between them

	DBD depth ≥ 4 mm			DBD depth (mm)			PD (mm)			PD reduction vs DBD depth reduction (mm)
	BL	Po.6 m	P-value	BL	Po.6 m	P-value	BL	Po.6 m	P-value	PD reduction	DBD depth reduction	Difference	P-value
	%	%	P-value	Mean ± SD	Mean ± SD	P-value	Mean ± SD	Mean ± SD	P-value	Mean ± SD	Mean ± SD	Mean ± SD	P-value
DL	18.31	6.10	0.000	2.70 ± 1.86	1.91 ± 1.19	0.000	6.33 ± 2.07	5.67 ± 1.18	0.000	0.61 ± 2.01	0.79 ± 1.38	− 0.21 ± 2.36	NS
DM	63.38	27.70	0.000	4.72 ± 2.17	3.18 ± 1.57	0.000	11.25 ± 3.70	4.57 ± 1.34	0.000	6.62 ± 3.88	1.55 ± 1.66	5.03 ± 4.00	0.000
DB	72.77	45.07	0.000	5.43 ± 2.29	3.95 ± 1.84	0.000	13.92 ± 2.74	6.94 ± 2.13	0.000	6.94 ± 3.04	1.50 ± 1.59	5.38 ± 2.84	0.000
Mean value	51.49	26.29	0.000	4.28 ± 1.66	3.01 ± 1.28	0.000	10.50 ± 1.72	5.73 ± 1.27	0.000	4.72 ± 1.86	1.28 ± 1.24	3.38 ± 1.84	0.000

DBD Distal intra-bony defect. PD at BL was the distance from the distal marginal ridge of the M2M to the bottom of the DBD. PD at Po.6 m was the distance from the distal marginal ridge of the M2M to the junctional epithelium. “NS” denotes “no significant difference”

ISSN: 1472-6831