Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
Chin Med J (Engl). 2012 Jan;125(1):119-22.
The prevalence of malocclusion in modern population is higher than that in the excavated samples from the ancient times. Presently, the prevalence of juvenile malocclusion in the early stage of permanent teeth is as high as 72.92% in China. This study aimed to observe and evaluate the prevalence and severity of malocclusions in a sample of Xia Dynasty in China, and to compare these findings with the modern Chinese population.
The material consisted of 38 male and 18 female protohistoric skulls of Xia Dynasty 4000 years ago. Of 86 dental arches, 29 cases had the jaw relationships. Tooth crowding, diastema, individual tooth malposition and malocclusion were studied.
Of the samples, 23.3% showed tooth alignment problems including crowding (8.1%), diastema (9.3%), and individual tooth malposition (5.8%). The prevalence of malocclusion was 27.6%, mainly presented as Angle Class I.
It is indicated that over thousands of years from Neolithic Age (6000 - 7000 years ago) to Xia Dynasty (4000 years ago), the prevalence of malocclusion did not change significantly. The prevalence of malocclusion of Xia Dynasty samples was much lower than that of modern population.
现代人群的错颌畸形患病率高于古代发掘样本。目前，中国恒牙早期青少年错颌畸形的患病率高达 72.92%。本研究旨在观察和评估中国夏代样本的错颌畸形患病率和严重程度，并将这些发现与现代中国人进行比较。
本材料由 38 名男性和 18 名女性夏代 4000 年前的史前颅骨组成。在 86 个牙弓中，有 29 例存在颌骨关系。研究了牙拥挤、间隙、个别牙齿错位和错颌畸形。
在样本中，有 23.3%的人出现牙齿排列问题，包括拥挤（8.1%）、间隙（9.3%）和个别牙齿错位（5.8%）。错颌畸形的患病率为 27.6%，主要表现为安氏Ⅰ类。
从新石器时代（6000-7000 年前）到夏代（4000 年前），几千年过去了，错颌畸形的患病率并没有明显变化。夏代样本的错颌畸形患病率远低于现代人群。
