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KMID : 0358819910180020216
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Journal of Korean Society of Plastic and Reconstructive Surgeons
1991 Volume.18 No. 2 p.216 ~ p.221
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CEPHALOMETRIC ANALYSIS OF MANDIBULAR GROWTH IN RABBITS
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이해욱/Lee, Hae Wook
권성택/김진환/Kwon, Sung Tack/Kim, Chin Whan
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Abstract
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Much progress has been made on the study of the growth and development of craniofacial skeleton with the increase of craniofacial surgery, but many problems remain to be clarified about the choice of appropriate experimental animals and accurate measurements.
The pattern of craniofacial skeletal growth is unique and various methods have been attempted to assess it. Recently, serial cephalometric roentgenography in concert with radiopaque implants, which serve as fixed reliable markers, was introduced to be the most accurate method to determine it.
On the other hand, some authors observed retardation of craniofacial skeletal growth subsequent to rigid fixation with miniplate and screws in craniomaxillofacial reconstruction of children. The aim of this study is as a basic research to understand these problems better. New Zealand white rabbits 500-750gm in weights were used as experimental animals. Two clinically available titanium screws were implanted into the body of mandible and serial cephalometric roentgenographs were taken as the animals grew up. Obtained roentgenographs were analysed to assess the pattern and amount of mandibular growth and compared with that of the control animal group.
Results of the experiments were as followings ;
I) The growth of mandible by the implanted titanium screws revealed no statistically significant influence to that of control group.
2) Serial cephalometric analysis using two implanted titanium screws as fixed reference points revealed volumetric change and pattern of mandibular growth. Therefore it is a more accurate and a useful experimental method assessing the craniofacial skeletal growth.
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KEYWORD
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