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作者对527例牙位异常和出牙困难的病人进行X线检查。男242例,女285例;年龄11～15岁26例,16～20岁44例,21～30岁98例,31～40岁217例,41～50岁87例,51～60岁55例。X线检查包括摄口内牙片和口外颌骨片及曲面体层摄影。结果显示,88垂直阻生190例(男100例,女90例),77远中面至下颌支前缘的距离:1cm左右45例,1.5～3mm52例,部分88牙冠被升支前缘遮盖93
The author of 527 cases of dental anomalies and teeth difficult patients X-ray examination. There were 242 males and 285 females; 26 patients aged 11-15 years, 44 patients aged 16-20 years, 98 patients aged 21-30 years, 217 patients aged 31-40 years, 87 patients aged 41-50 years and 55 patients aged 51-60 years . X-ray examination including the mouth of the oral and oral jaw and curved body surface photography. The results showed that 88 vertical occlusion of 190 cases (100 males and 90 females), 77 distal midface to mandibular anterior margin distance: 45cm around 1cm, 1.5 ~ 3mm52 cases, some 88 crowns were ascending anterior margin Cover 93