Are Hyoid Bone and Tongue the Risk Factors Contributing to Postoperative Relapse for Mandibular Prognathism?

Table 4

Angular measurements for the various cephalometric parameters of the serial postsurgical changes.

Angular degrees (°)	T2-T1			T3-T2			T4-T3			T4-T1			T4-T2
	Mean	SD		Mean	SD		Mean	SD		Mean	SD		Mean	SD
G-PNS-ANS	6.8	4.23		1.6	3.55		−2.2	3.35		6.1	4.71		−0.6	3.39	—
H-PNS-ANS	2.6	5.55		1.3	4.18	—	−1.6	4.56		2.3	5.47		−0.3	4.83	—
G-H-V	−28.4	18.88		23.9	18.82		−2.3	18.60	—	−6.8	17.23		21.6	18.69

: significant, .
—: not significant.
T2-T1: postsurgical immediate change; T3-T2: difference between postsurgical immediate change and 6 weeks to 3 months’ change.
T4-T3: change between postsurgical 6 weeks to 3 months and over 1 year.
T4-T1: over 1 year final surgical change; T4-T2: over 1 year surgical stability.