Shimizu M, Osa N, Okamura K, Yoshiura K
Department of Oral & Maxillofacial Radiology, Faculty of Dental Science, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka, 812-8582 Japan.
Dentomaxillofac Radiol. 2006 Mar;35(2):95-102. doi: 10.1259/dmfr/71115878.
To investigate the aetiology of Stafne's bone defects by analysing the CT findings of two types of defects, which appeared differently on panoramic radiographs.
32 lesions with suspicion of the Stafne's bone defect on a panoramic radiograph were categorised into two groups: typical "Stafne type", which showed the connection to the base of the mandible, and non-typical "Cyst type", which showed no connection. Age, sex, the existence of hypertension and the following CT findings: location, size and inner content of the defect, existence of expansion of the buccal cortical bone, and location of submandibular glands, were analysed.
There were 14 "Stafne type" and 17 "Cyst type" on the panoramic radiographs. One lesion in the "Cyst type" was a true cystic lesion and was excluded from further review. The "Stafne type" was seen primarily in the posterior and inferior locations, while the "Cyst type" was seen in the anterior and superior locations on the CT. The size of the defect was significantly larger in the "Stafne type". Buccal cortical expansion was observed only in three lesions in the "Stafne type". While the "Cyst type" contained mainly fatty tissue, the "Stafne type" contained other soft tissues. Though the submandibular glands on the defect side were located anteriorly in both types compared with those on the contralateral side and on the control patients, they spread mainly outwards in the "Stafne type".
The Stafne's bone defects are thought to be caused by the dislocated submandibular gland. The differences between the two types might occur as a result of a different location of the submandibular gland.
通过分析两种在全景X线片上表现不同的骨缺损的CT表现，探讨斯滕内骨缺损的病因。
将32例全景X线片上疑似斯滕内骨缺损的病变分为两组：典型的“斯滕内型”，显示与下颌骨底部相连；非典型的“囊肿型”，显示无连接。分析年龄、性别、高血压的存在情况以及以下CT表现：缺损的位置、大小和内部内容物、颊侧皮质骨扩张的存在情况以及下颌下腺的位置。
全景X线片上有14例“斯滕内型”和17例“囊肿型”。“囊肿型”中的1个病变为真正的囊性病变，被排除在进一步研究之外。“斯滕内型”主要见于后部和下部位置，而“囊肿型”在CT上见于前部和上部位置。“斯滕内型”缺损的大小明显更大。仅在“斯滕内型”的3个病变中观察到颊侧皮质扩张。“囊肿型”主要包含脂肪组织，而“斯滕内型”包含其他软组织。尽管与对侧和对照患者相比，缺损侧的下颌下腺在两种类型中均位于前方，但它们在“斯滕内型”中主要向外扩散。
斯滕内骨缺损被认为是由下颌下腺脱位引起的。两种类型之间的差异可能是由于下颌下腺位置不同所致。
