Inagaki K, Suzuki M, Nozaki K, Noguchi T, Miyajima K, Sakai M, Miyao T, Tsurumi K, Jinno T
Aichi-Gakuin University, School of Dentistry.
Aichi Gakuin Dent Sci. 1991;4:53-64.
In 1941, the Ohguruwa remains were discovered at the Mizuho sports ground site in Nagoya. They date from about 3000 B.C., which is the early Jomon era. When the stadium was reconstructed in 1980, four human skeletons were found. Three of them, however, were in poor condition and moreover, were incomplete. However, the second skeleton was in good condition and could almost be reconstructed, and this skeleton (No. 2) was used for our study. It was found in the classic posture with arms and legs folded. Some pieces of a dog's skeleton were also discovered near the No. 2 skeleton's chest. This particular skeleton generally showed characteristics typical of the Jomon era. It had a stout structure and was judged to be a middle aged male because of the following features. There was considerable attrition of the occlusal surfaces on the remaining teeth. The teeth were worn flat, probably owing to the hard food and to their use as a tool. Both canines and first premolars of the upper and lower arches had been extracted in accordance with the custom of the time. Typical caries and localized periodontal breakdown were not observed, although there was horizontal alveolar bone loss, especially in the anterior regions. The mastoid process was extremely large and prominent. The lateral prominence of the mandible was developed. Analysis of lateral cephalogram revealed that the mandible was in the anterior position. The angles of SNA, SNB and ANB were 89.6 degrees, 89.2 degrees and 0.4 degrees, respectively. The skeletal pattern was definitive Class III. The adaptive changes in the teeth, their supporting tissues, temporomandibular joints and the related muscles--the harmonious masticatory system--were all estimated.
1941年，在名古屋的瑞穗运动场遗址发现了大 guruwa 遗迹。它们可追溯到公元前3000年左右，即绳纹时代早期。1980年体育场重建时，发现了四具人类骨骼。然而，其中三具状况不佳，而且不完整。不过，第二具骨骼状况良好，几乎可以重建，这具骨骼（编号2）被用于我们的研究。它是以手臂和腿折叠的经典姿势被发现的。在2号骨骼胸部附近还发现了一些狗的骨骼碎片。这具特殊的骨骼总体上呈现出绳纹时代的典型特征。它结构粗壮，由于以下特征被判定为一名中年男性。剩余牙齿的咬合面有相当程度的磨损。牙齿被磨平了，可能是由于食物坚硬以及用作工具的缘故。上下牙弓的犬齿和第一前磨牙都按照当时的习俗被拔掉了。虽然存在水平牙槽骨吸收，尤其是在前部区域，但未观察到典型的龋齿和局限性牙周破坏。乳突非常大且突出。下颌骨的外侧突出发达。头颅侧位片分析显示下颌骨处于前位。SNA、SNB 和 ANB 角分别为89.6度、89.2度和0.4度。骨骼模式为确定的III类。对牙齿、其支持组织、颞下颌关节和相关肌肉——和谐的咀嚼系统的适应性变化进行了全面评估。
