本文收集了上颌中切牙区多生牙５６例，发现其无论是否萌出，一般均有典型的临床表现。对其生长情况作统计分析，发现该区同时发生两个多生牙者较多见（５８．９％），而且两个多生牙常分别位于腭中缝两侧（９０％）；多生牙的生长方向可能有竖直、倒立与水平等几种，萌出方向异常者均造成阻生。作Ｘ线定位诊断，发现该区埋伏多生牙绝大多数（８７．３％）位于中切牙腭侧的颌骨内，少数（１２．７％）位于牙弓内中切牙之间，未见有唇侧埋伏者。 This article collected 56 cases of maxillary central incisor area polygamy, found that whether or not eruption, the general are typical clinical manifestations. Statistical analysis of their growth showed that there were more than two multiple births in the district (58.9%), and the two common births were located on both sides of the mid-palatal slit (90%), respectively The direction of growth may be vertical, inverted and horizontal, etc., eruption direction caused by abnormalities were impacted. X-ray localization diagnosis showed that the vast majority (87.3%) of the ambushing teeth in this area were located in the jawbone of the palatal incisors and a few (12.7%) were located between the incisors, No one has labial ambush.