Microsurgical Anatomy of the Superior Wall of the Mandibular Canal and Surrounding Structures: Suggestion for New Classifications for Dental Implantology
Microsurgical Anatomy of the Superior Wall of the Mandibular Canal and Surrounding Structures: Suggestion for New Classifications for Dental Implantology
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DOI：
10.1002/ca.23456
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发表时间：
2019-09-08
期刊：
影响因子：
2.4
通讯作者：
Tubbs, R. Shane
中科院分区：
文献类型：
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作者：
Iwanaga, Joe;Anand, Mahindra Kumar;Tubbs, R. Shane
我们的目标是弄清楚下颌管上壁和牙齿的存在之间的关系。我们还试图研究牙齿缺失后下颌管的结构变化。研究对象为10侧干燥下颌骨，男6例，女4例。这些标本死亡时的年龄从57岁到91岁不等。下颌骨在正中切开，形成20个半下颌骨。每个半下颌记录牙齿的存在(从第二个前磨牙到第三个磨牙)。下颌骨体内的下颌管分为四个区，即1-4区。观察下颌管上壁和下颌管上方的松质骨样结构。然后，水平切开下颌管中心，下方观察下颌管上壁。共产生75个区域(20个有牙区和55个无牙区)。远端切面分为三组：I型(骨小梁型)、II型(骨质疏松型)和III型(致密/不规则型)。有牙区I型占60.0%(12/20)，无牙区I型占32.7%。有牙区为15.0%(23/55)，无牙区为41.8%。根据下颌管上壁面的不同，下切面分为4类，即I类(骨小梁型)、II类(骨质疏松型)、III类(致密/不规则型)和IV类(光滑型)，有牙区最常见(55.0%)，无牙区最多见(45.5%)。根据这些结果，我们得出结论，随着牙齿的缺失，下颌管上壁可能会发生变化。克莱恩。阿纳特，2019年。(C)2019年威利期刊公司。
Our goal was to clarify the relationship between the superior wall of the mandibular canal and the presence of teeth. We also sought to study the structural changes of the mandibular canal after tooth loss. Twenty sides from 10 dry mandibles derived from six males and four females were used for this study. The age of the specimens at the time of death ranged from 57 to 91 years. The mandibles were cut in the midline resulting in 20 hemi-mandibles. The presence of teeth (from the second premolar to the third molar) was recorded for each hemi-mandible. The mandibular canal in the body of the mandible was divided into four areas, that is, Areas 1-4. The superior wall of the mandibular canal and a cancellous bone pattern above the mandibular canal were observed. Next, the mandibular canal was horizontally cut at its center and the superior wall of the mandibular canal observed inferiorly. A total of 75 areas (20 dentulous areas and 55 edentulous areas) were produced. The distal view was classified into three groups, Type I (trabecular pattern), Type II (osteoporotic pattern), and Type III (dense/irregular pattern). The Type I pattern was found in 60.0% (12/20) of the dentulous areas and 32.7% of the edentulous areas. While the Type II pattern was found in 15.0% (23/55) of the dentulous areas and 41.8% of the edentulous areas. The inferior view was classified into four groups depending on the surface of the superior wall of the mandibular canal, that is, Class I (trabecular pattern), Class II (osteoporotic pattern), Class III (dense/irregular pattern), and Class IV (smooth).The Class I pattern was seen most frequently (55.0%) in dentulous areas and the Class IV pattern (45.5%) most frequently in edentulous areas. Based on these results, we conclude that the superior wall of the mandibular canal could change following tooth loss. Clin. Anat., 2019. (c) 2019 Wiley Periodicals, Inc.