Table 4 Intra-oral features (Inter-arch characteristics) of malocclusion within gender groups

Molar relationship

2° first molars not present

8 (3.00)

9 (3.00)

15 (5.00)

14 (4.00)

23

3.80

23

3.80

Class I

188 (67.0)

192 (69.0)

210 (64.0)

198 (61.0)

398

65.7

390

64.4

Class II

68 (24.0)

62 (22.0)

78 (24.0)

85 (26.0)

146

24.1

147

24.3

Class III

16 (6.00)

17 (6.00)

23 (7.00)

29 (9.00)

39

6.4

46

7.6

Canine relationship

2° canines are not present

91 (32.5)

92 (33.0)

98 (30)

103 (31.5)

189

31.2

195

32.2

Class I

115 (41.0)

119 (42.0)

132 (40.5)

119 (36.5)

247

40.8

238

39.3

Class II

64 (23.0)

64 (23.0)

85 (26.0)

90 (28.00)

149

24.6

154

25.4

Class III

10 (4.50)

5 (2.00)

11 (3.50)

14 (4.00)

21

3.5

19

3.1

Crossbite

None

223 (79.6)

259 (79.0)

482

79.5%

Buccal crossbite

52 (18.6)

65 (20.0)

117

19.3%

Lingual crossbite

5 (1.80)

2 (1.00)

7

1.20%

Mandibular displacement (MD)

None

264 (94)

313 (96.0)

577

95.2%

Anterior MD

8 (3)

6 (2.00)

14

2.30%

Lateral MD

8 (3)

7 (2.00)

15

2.50%

Discrepancy between the RCP and ICP

None

254 (91.0)

287 (88.0)

541

89.3%

 < 1 mm

12 (4.00)

19 (6.0)

31

5.10%

1–2 mm

11 (4.00)

16 (5.0)

27

4.50%

 > 2 mm

3 (1.00)

4 (1.0)

7

1.20%

Incisors relationship

Class I

114 (41.0)

131 (40.0)

245

40.4%

Class II d1

70 (25.0)

80 (25.0)

150

24.8%

Class II d 2

56 (20.0)

56 (17.0)

112

18.5%

Class III

40 (14.0)

59 (18.0)

99

16.3%

Overjet

Average

132 (47.0)

147 (45.0)

279

46.0%

Increased

101 (36.0)

118 (36.0)

219

36.1%

Reduced

39 (14.0)

54 (17.0)

93

15.3%

Reversed

8 (3.00)

7 (2.00)

15

2.50%

Overbite

Average

93 (33.2)

109 (33.4)

202

33.3%

Increased

98 (35.0)

91 (28.0)

189

31.2%

Reduced

74 (26.4)

105 (32.2)

179

29.5%

AOB

15 (5.40)

21 (6.40)

36

5.90%