지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.12
- 수록면
- 109 - 115 (7page)
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초록· 키워드
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Purpose: This study analyzed the effects of digastric muscle injury on mandibular growth in young rats.
Methods: Fourteen 4-week-old Wistar rats were divided into 3 groups; experimental group A (n=6) with unilateral (right) shortening of the posterior digastric muscle, experimental group B (n=6) with bilateral shortening of the posterior digastric muscles, and control group C (n=2) who underwent a sham operation. Eight weeks after the operation all animals were sacrificed and the outcomes were compared using body weight evaluation, mensurations on lateral radiograph of hemimandibles and histological evaluation.
Results: There was no significant difference between groups A and B in body weight gain. Comparison of the mean values of hemimandible distance on radiograph was performed. The difference in group mean value of mandible-related distances was analyzed using the Wilcoxon test (rank sum test) and a comparison of the homonymous distances of group A and B was performed using the Mann-Whitney test. There were differences between sides in mandibular length in group B and mandibular ramus height and transverse width of the condyle in group A (all, p<0.05). There were differences in condylar height and mandibular length on the left side between groups A and B (p<0.05). Histologic examination of temporomandibular joint showed similar findings in all specimens.
Conclusions: Injury of the posterior belly of the digastric muscle during the rat growth period induced shortening of mandibular ramus height and transverse width of the condyle. It can be inferred that trauma to the posterior belly of the digastric muscle affects horizontal and vertical growth of the mandible.
Methods: Fourteen 4-week-old Wistar rats were divided into 3 groups; experimental group A (n=6) with unilateral (right) shortening of the posterior digastric muscle, experimental group B (n=6) with bilateral shortening of the posterior digastric muscles, and control group C (n=2) who underwent a sham operation. Eight weeks after the operation all animals were sacrificed and the outcomes were compared using body weight evaluation, mensurations on lateral radiograph of hemimandibles and histological evaluation.
Results: There was no significant difference between groups A and B in body weight gain. Comparison of the mean values of hemimandible distance on radiograph was performed. The difference in group mean value of mandible-related distances was analyzed using the Wilcoxon test (rank sum test) and a comparison of the homonymous distances of group A and B was performed using the Mann-Whitney test. There were differences between sides in mandibular length in group B and mandibular ramus height and transverse width of the condyle in group A (all, p<0.05). There were differences in condylar height and mandibular length on the left side between groups A and B (p<0.05). Histologic examination of temporomandibular joint showed similar findings in all specimens.
Conclusions: Injury of the posterior belly of the digastric muscle during the rat growth period induced shortening of mandibular ramus height and transverse width of the condyle. It can be inferred that trauma to the posterior belly of the digastric muscle affects horizontal and vertical growth of the mandible.
목차
INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION
REFERENCES
참고문헌 (24)
참고문헌 신청
[학술지(정기간행물)] - Teixeira VC / 2006 / Skeletal changes after experimentally displaced condylar process fracture in growing rats / J Craniomaxillofac Surg 34 : 220 ~ 225
[학술지(정기간행물)] - Li Z / 2010 / The role of the disc in the healing of displaced subcondylar fracture in the growing period: an experimental study in rats / Int J Oral Maxillofac Surg 39 : 388 ~ 393
[학술지(정기간행물)] - Legrell PE / 1998 / Mandibular height asymmetry following experimentally induced temporomandibular joint disk displacement in rabbits / Oral Surg Oral Med Oral Pathol Oral Radiol Endod 86 : 280 ~ 285
[학술지(정기간행물)] - Dimitroulis G / 1997 / Condylar injuries in growing patients / Aust Dent J 42 : 367 ~ 371
[학술지(정기간행물)] - Yamashiro T / 1998 / Case report: facial asymmetry and early condylar fractur / Angle Orthod 68 : 85 ~ 90
[학술지(정기간행물)] - Li Z / 2010 / The role of the disc in the healing of displaced subcondylar fracture in the growing period: an experimental study in rats / Int J Oral Maxillofac Surg 39 : 388 ~ 393
[학술지(정기간행물)] - Legrell PE / 1998 / Mandibular height asymmetry following experimentally induced temporomandibular joint disk displacement in rabbits / Oral Surg Oral Med Oral Pathol Oral Radiol Endod 86 : 280 ~ 285
[학술지(정기간행물)] - Dimitroulis G / 1997 / Condylar injuries in growing patients / Aust Dent J 42 : 367 ~ 371
[학술지(정기간행물)] - Yamashiro T / 1998 / Case report: facial asymmetry and early condylar fractur / Angle Orthod 68 : 85 ~ 90
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