BMC Oral Health

Table 4 Relationships between maxillary sinus membrane thickness and periodontal bone loss, age, and gender

From: Evaluating the relationship between periodontal bone loss in maxillary posterior teeth and Schneiderian membrane thickness

			Anterior MT/Premolar				Median MT/I. Molar				Posterior MT/II. Molar
Age	Gender	MT	n	PBL (mm)	Std.	p	n	PBL (mm)	Std.	p	n	PBL (mm)	Std.	p
Group I	F	Class I	135	1.27	0.39	0.000*	122	1.12	0.37	0.021**	151	0.98	0.33	0.432
		Class II	44	1.74	0.57		51	1.74	0.55		39	1.73	0.58
		Class III	23	2.72	0.66		26	2.92	0.78		17	2.53	0.87
	M	Class I	67	1.23	0.37	0.002**	68	1.21	0.46	0.026**	82	1.13	0.5	0.248
		Class II	42	1.89	0.64		45	1.78	0.6		42	1.67	0.66
		Class III	30	2.72	0.65		15	2.91	0.59		17	2.82	0.79
Group II	F	Class I	28	1.29	0.59	0.415	23	1.35	0.92	0.369	34	1.18	0.63	0.996
		Class II	42	1.76	0.63		39	1.76	0.66		48	1.55	0.6
		Class III	41	2.75	0.99		31	2.76	1.05		28	2.93	0.88
		Class IV	2	6.23	2.22		2	6.51	3.26		3	5.27	0.69
	M	Class I	12	1.41	0.65	0.013**	9	1.42	0.77	0.132	13	1.31	0.79	0.161
		Class II	29	1.99	0.83		29	1.82	0.52		45	1.88	0.68
		Class III	51	3.18	0.97		30	3.32	1.05		41	3.08	0.81
		Class IV	3	5.98	0.63		2	6.42	2.56		-	-	-
Group III	F	Class I	13	1.5	0.45	0.112	9	1.63	0.61	0.228	19	1.37	0.69	0.156
		Class II	45	1.91	0.62		31	2.05	0.67		37	1.9	0.63
		Class III	53	3.03	0.8		52	3	0.71		57	2.93	0.7
		Class IV	13	5.42	0.74		12	5.2	1.26		11	5.63	1.74
		Class V	-	-	-		2	12.36	1.51		-	-	-
	M	Class I	-	-	-	0.061	5	2.34	0.48	0.124	4	2.34	0.33	0.133
		Class II	20	1.95	0.68		11	2.06	0.89		20	2.14	0.81
		Class III	69	3.2	0.86		42	3.18	0.87		52	3.1	0.99
		Class IV	27	5.29	1.36		27	6.11	1.64		30	5.65	1.24
Group IV	F	Class I	1	3.02	-	0.631	-	-	-	0.808	-	-	-	0.798
		Class II	1	2.6	-		1	2.2	-		1	1.8	-
		Class III	11	3.38	0.62		4	2.84	0.49		8	3.32	0.3
		Class IV	4	4.57	0.26		6	4.82	0.71		4	4.66	0.63
	M	Class I	1	1	-	0.844	-	-	-	0.854	-	-	-	0.964
		Class II	2	1.74	0.13		-	-	-		2	2.27	0.09
		Class III	5	3.26	0.2		5	2.81	0.3		4	3.45	0.46
		Class IV	12	4.9	0.85		2	6.4	0.85		8	6.07	0.75

*p < 0.001
**p < 0.05
n: Number of teeth, F: Female, M: Male, MT: Membrane thickness, PBL: Periodontal bone loss, Std: Standard deviation

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