Table 3. Association of between MT and restorations.

		MT						Kruskall-Wallis H test
		n	Mean	Median	Minimum	Maximum	sd	Average rank	H	P value
Tooth # 4	Normal	86	9.4	5.8	0.0	48.0	9.7	252.09	7.4	0.283
	Caries	237	8.9	6.1	0.0	41.0	7.9	263.08
	RCT	15	9.7	6.9	1.5	33.5	8.0	287.90
	Filled	7	11.2	9.2	3.3	23.0	7.6	327.21
	Inadequate RCT	39	10.0	7.0	1.2	36.0	8.5	282.12
	Crown	47	10.5	7.4	1.5	30.1	8.5	293.31
	Missed	117	11.2	8.3	0.0	43.0	9.3	299.14
Tooth # 5	Normal	76	7.9	5.3	0.0	37.1	7.5	239.91	13.8	0.031*
	Caries	221	9.3	6.4	0.0	41.0	8.1	268.63
	RCT	10	8.3	5.7	1.5	28.5	8.4	233.00
	Filled	5	9.9	4.7	2.9	22.2	8.9	270.00
	Inadequate RCT	37	11.0	7.3	1.6	38.0	9.9	294.38
	Crown	45	13.9	12.3	2.1	43.0	10.2	343.66
	Missed	154	9.9	6.9	0.0	48.0	8.8	277.85
Tooth # 6	Normal	37	9.3	6.9	0.0	39.0	9.1	268.69	10.1	0.117
	Caries	208	8.9	6.2	0.0	41.0	7.8	259.62
	RCT	8	8.6	5.5	2.5	22.7	7.5	255.38
	Filled	14	7.8	5.6	2.6	19.4	5.0	261.39
	Inadequate RCT	49	7.9	5.5	0.0	36.0	7.1	238.13
	Crown	19	9.4	6.5	2.5	33.5	8.3	275.11
	Missed	213	11.2	8.1	0.0	48.0	9.6	299.93
Tooth # 7	Normal	92	8.8	6.3	0.0	37.1	7.6	264.48	20.3	0.002*
	Caries	206	8.9	6.1	0.0	41.0	8.1	259.14
	RCT	1	6.5	6.5	6.5	6.5		266.50
	Filled	16	7.4	6.8	1.7	18.0	4.5	257.50
	Inadequate RCT	45	12.6	8.5	1.3	38.0	10.3	315.88
	Crown	36	15.0	13.1	0.0	36.2	9.7	374.86
	Missed	152	9.6	6.5	1.2	48.0	8.9	267.20

RCT, Root canal treatment; MT, mucosal thickness.

* Significant difference between coronal restorations and MT.