Table 2.

Distribution of malocclusion among 3016 Saudi Adolescence according to gender using modified Bjork et al. system

Malocclusion type	Male		Female		Total		P
	n	%	n	%	n	%
Angle’s classification
Normal Class I	177	5.8	181	6	358	12	<0.001
Class I malocclusion	699	23	1019	34	1718	57
Class II malocclusion	347	11.5	171	5.7	518	17
Class II Division1	238	7.9	150	5	388	13
Class II Division2	109	4	21	0.7	130	4
Class III malocclusion	286	9.5	136	4.5	422	14
Overjet
Edge to edge 0mm	49	21.6	65	2	114	3.8	<0.001
Moderate 4-6 mm	250	8	180	5.9	430	14
Severe >6mm	54	1.8	18	0.6	72	4
Scissor bite
Scissor bite >2mm	31	1	16	0.5	47	2	0.02
Crossbite
Anterior crossbite	159	5.3	19	0.62	178	6	<0.001
Posterior crossbite	335	11	429	14.2	764	25	<0.001
Midline shift >2mm
Upper midline shift	245	8.1	135	4.5	380	13	<0.001
Lower midline shift	672	22	519	17	1191	39.5	<0.001
Overbite
Moderate deep bite 4-6 mm	416	14	389	13	805	27	0.35
Severe deep bite >6 mm	27	1	19	0.62	46	1.5
Moderate open bite 4-6 mm	165	5.5	16	0.5	181	6	0.27
Severe open bite >6 mm	120	4	7	0.2	127	4
Crowding >2 mm
Upper crowding	894	30	488	16	1382	46	<0.001
Lower crowding	933	31	648	21.5	1581	52	<0.001
Spacing >2 mm
Upper spacing	224	7	235	7.8	459	15	<0.001
Lower spacing	153	5.1	183	6.1	336	11	0.02