Ivanov A S
Arkh Anat Gistol Embriol. 1976 Apr;70(4):61-5.
Specific features of the disposition of root apexes of premolars and molars in the alveolar process of the upper jaw were studied in 148 skulls and 67 tooth-jaw cuts. The least thickness of the alveolar process was found to be at the level of the first premolar (10,41 +/- 0,33 mm), and the greatest--at the level of the first molar (14,075 +/- +/- 0,456 mm). Strong correlation of the alveolar process was established between the levels of the premolars and the last two molars. The distance from the apexes of cheek roots of the first molar to the bottom of the maxillary sinus is 2,05--2,92 mm, and the palatal roots -- 2,02 mm. On roentgenograms the molar roots are often projected on the sinus bottom.
在148个颅骨和67个牙颌切片中研究了上颌牙槽突中前磨牙和磨牙根尖的分布特征。发现牙槽突最薄处位于第一前磨牙水平（10.41±0.33毫米），最厚处位于第一磨牙水平（14.075±0.456毫米）。在前磨牙和最后两颗磨牙水平之间建立了牙槽突的强相关性。第一磨牙颊根根尖到上颌窦底部的距离为2.05 - 2.92毫米，腭根为2.02毫米。在X线片上，磨牙根常投影于窦底。
