Table 1.

Means of mouth opening during whole follow up intervals.

	Mean ± standard deviation		“t”	Probability
	Hard	Soft
Preoperative	26.94 ± 20.60	26.03 ± 3.84	0.898	0.187
1 M	28.39 ± 2.95	27.88 ± 3.93	0.482	0.316
2 M	29.89 ± 3.38	29.34 ± 4.15	0.475	0.318
3 M	32.67 ± 2.67	33.28 ± 3.05	0.713	0.240
4 M	34.22 ± 1.77	35.22 ± 2.01	1.754	0.043
F value	21.779	38.239
Probability	2.14E-12	3.09E-22
LSD	1.818	1.726