Table 2.
Distribution of subjects with speech disorders and morphological characteristics of occlusion into groups
| (1) Group TMD | (2) Group S and S | (3) Group S or S | (4) Group N | Total | |
|---|---|---|---|---|---|
| n=40 | n=68 | n=33 | n=11 | n=152 | |
| Speech disorders | 13 (33%) | 27 (40%) | 15 (45%) | 2 (18%) | 57 (38%) |
| Distortions /s/ and /z/ | 6 (15%) | 17 (25%) | 5 (15%) | 1 (9%) | 29 (19%) |
| Substitutions and omissions | 3 (8%) | 2 (3%) | 1 (3%) | 0 | 6 (4%) |
| Frontal lisp /s/ and /z/ | 7 (18%) | 7 (10%) | 3 (9%) | 1 (9%) | 18 (12%) |
| Tongue thrust /t/; /d/; /n/;/l/ | 8 (20%) | 10 (15%) | 5 (15%) | 1 (9%) | 24 (16%) |
| Deviations of the jaw to left or right | 0 | 0 | 0 | 0 | 0 |
| Reduction of vertical amplitude | 2 (5%) | 3 (4%) | 5 (15%) | 0 | 10 (7%) |
| Occlusal characteristics | |||||
| Class I | 27 (68%) | 36 (53%) | 25 (76%) | 8 (73%) | 96 (63%) |
| Class II | 13 (33%) | 31 (46%) | 7 (21%) | 3 (27%) | 54 (36%) |
| Class III | 0 | 1 (1%) | 1 (3%) | 0 | 2 (1%) |
| Posterior crossbite | 7 (18%) | 7 (10%) | 3 (9%) | 2 (18%) | 19 (13%) |
| Overbite ≥2/3 | 21 (53%) | 43 (63%) | 17 (52%) | 5 (45%) | 86 (57%) |
| Overjet ≥4 mm | 18a (45%) | 43a (63%) | 11b (33%) | 1b (9%) | 73 (48%) |
Values followed by different superscript small letters differ significantly (p<0.05 Fisher's Exact test or Qui-square)