Zia Majid, Azad Azad Ali, Ahmed Salman
Department of Prosthodontics, Dental Section, Ayub Medical College, Abbottabad, Pakistan.
J Ayub Med Coll Abbottabad. 2009 Oct-Dec;21(4):125-8.
After loss of natural teeth, provision of prosthodontic services almost becomes necessity in the present day living. To provide effective mastication teeth have peculiar forms. To make it more efficient both functionally and biologically, they are arranged in particular geometric manner referred to as dental arch. The objective of this study was to compare the distance between mesial edge of the maxillary central incisors and posterior border of the incisive papilla in dentate individuals with different arch forms.
After sample selection, impressions were made for upper and lower arches and the resultant casts were standardised. Arch forms were assessed by their morphological description. Measurements on cast were recorded for incisive papilla (IP) and maxillary central incisor (CI) distance after securing it on cast surveyor.
Ovoid arch form was the most frequently observed arch form both in males (57%) and females (68%) while their combination (Ovoid Square and Ovoid tapered) were the least commonly observed arch forms (4% and 5% each). Gender seems to be important in about 1/4th of the dentate individuals, regarding both the type of the arches and CI-IP distance.
Ovoid type of arches was the commonest arch form seen in either sex. There is no significant difference between males and females in 3/4th of dentate individuals, regarding the type of dental arch as well as CI-IP distance.
在天然牙缺失后，如今进行口腔修复治疗几乎成为必然。为实现有效的咀嚼功能，牙齿具有独特的形态。为使其在功能和生物学上更高效，它们以一种特殊的几何方式排列，即牙弓。本研究的目的是比较不同牙弓形态的有牙颌个体中上颌中切牙近中边缘与切牙乳头后缘之间的距离。
样本选取后，制取上下牙弓印模，并对所得模型进行标准化处理。通过形态学描述评估牙弓形态。将模型固定在模型测量仪上后，记录模型上切牙乳头（IP）与上颌中切牙（CI）之间的距离测量值。
椭圆形牙弓形态在男性（57%）和女性（68%）中都是最常观察到的牙弓形态，而它们的组合（椭圆形 - 方形和椭圆形 - 锥形）是最不常观察到的牙弓形态（各占4%和5%）。就牙弓类型和CI - IP距离而言，性别在约四分之一的有牙颌个体中似乎很重要。
椭圆形牙弓形态是两性中最常见的牙弓形态。在四分之三的有牙颌个体中，男性和女性在牙弓类型以及CI - IP距离方面没有显著差异。
