本世纪初,法国学者庞特发表了人类学指数,后称庞特指数(Pont index)。该指数表明上颌切牙的近远中径总和(简称总径,下同)与上颌第一双尖牙近中凹间距(双尖牙间距)、上颌第一磨牙中央凹间距(磨牙间距)有指数关系。此后,欧美不少学者从不同地区、不同民族的牙(牙合)模型测量中,均得出与庞特指数相似的结果,只 The beginning of this century, French scholar Ponte published an anthropological index, later known as the Pont index (Pont index). The index shows the maxillary incisors near and far the sum of the diameter (the total diameter, the same below) with the maxillary first bicuspid near-medial spacing (bicuspid gap), maxillary first molar central pit spacing (molar spacing) there Exponential relationship. Since then, many scholars from Europe and the United States from different regions and different nationalities (occlusal) model measurements, all come to similar results with the Pontiac index, only