Reyneke J P, Johnston T, van der Linden W J
Division of Maxillofacial and Oral Surgery, University of the Witwatersrand, Johannesburg, South Africa.
Br J Oral Maxillofac Surg. 1997 Oct;35(5):352-6. doi: 10.1016/s0266-4356(97)90409-5.
To compare the skeletal stability of wire and screw fixation after advancement genioplasty.
Retrospective study.
Teaching hospital and private practice, South Africa.
40 Patients who required advancement genioplasty, 20 in each group.
Advancement genioplasty measurements made on cephalometric radiographs before and immediately after operation, and at least 6 months later.
Comparison of horizontal and vertical measurements.
In the screw (rigid) group mean horizontal advancement was 6.3 mm followed by a relapse of 0.3 mm during the follow up period. The corresponding figures for the wire (non-rigid) group were 5.8 and 0.5 mm. The two differed significantly in the degree of vertical change but the result is clinically unimportant. There was no difference in the degree of horizontal change.
There was no difference in skeletal stability between the two groups.
比较颏成形术前进后退术后钢丝固定和螺钉固定的骨骼稳定性。
回顾性研究。
南非的教学医院和私人诊所。
40例行颏成形术前进后退术的患者，每组20例。
在术前、术后即刻及至少6个月后对头影测量X线片进行颏成形术前进后退术测量。
水平和垂直测量的比较。
螺钉（刚性）组平均水平前移6.3mm，随访期间复发0.3mm。钢丝（非刚性）组的相应数字分别为5.8mm和0.5mm。两组在垂直变化程度上有显著差异，但结果在临床上并不重要。水平变化程度无差异。
两组之间的骨骼稳定性无差异。
