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Three-dimensional growth pattern of the rat mandible revealed by periodic live micro-computed tomography

 Hak-Jin Kim  ;  Kyeong-Mee Park  ;  Hye-Jin Tak  ;  Ji Wook Choi  ;  Sang-Hoon Kang  ;  Wonse Park  ;  Sang-Hwy Lee 
 Archives of Oral Biology, Vol.87 : 94-101, 2018 
Journal Title
 Archives of Oral Biology 
Issue Date
Growth ; Mandible ; Micro-computed tomography ; Rat ; Skeletal unit ; Three-dimensional
OBJECTIVE: We wanted to evaluate the three-dimensional (3D) mandibular growth of Sprague-Dawley rats from 4th to 16th postnatal weeks with periodic and live micro-computed tomographic scanning. DESIGN: Twenty Sprague-Dawley rats were used for micro-CT scanning from 4th to 16th postnatal weeks. After 3D reconstruction of rat mandible, we performed the linear and angular measurements and the superimposition of the 3D models to evaluate the mandibular growth of rat. RESULTS: The results showed that the growth direction of the condylar and coronoid regions was superior primarily and posterior secondarily, while the condyle had minimal lateral growth. Moreover, the angular region was growing mainly toward the posterior and lateral direction, while the body and symphysis maintained small, incremental anterior-posterior growth. CONCLUSIONS: We could evaluate the amount, rate, and direction of growth using the mandibular skeletal unit. Some reference points and measurements were more relevant in properly characterizing 3D growth of the mandible. Their growth rates were the greatest between 4th and 8th postnatal weeks, a period which seems most appropriate for studies of rat mandible growth.
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2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Advanced General Dentistry (통합치의학과) > 1. Journal Papers
Yonsei Authors
Kim, Hak Jin(김학진) ORCID logo https://orcid.org/0000-0001-6063-3406
Park, Wonse(박원서) ORCID logo https://orcid.org/0000-0002-2081-1156
Lee, Sang Hwy(이상휘) ORCID logo https://orcid.org/0000-0002-9438-2489
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