インプラント径選択のための日本人歯頸部径の計測

抄録

The purpose of this study was to investigate the buccolingual and mesiodistal cervical diameters of each tooth in Japanese males and females to establish reference values for selecting suitable implants. The study examined the skulls of 110 cadavers belonging to the First Department of Anatomy of the Jikei University School of Medicine. The age and gender of each skull were known, and the skulls retained most of their dentition. The skulls were of 71 Japanese male and 39 Japanese female with an average age of 29 years. The gender difference for each tooth type was ascertained, then the maximum buccolingual and mesiodistal diameters of each tooth were measured at the cement-enamel junction and analyzed with respect to difference between the sexes and tooth type. The results were as follows:
1. The buccolingual diameters of the maxillary canine, mandibular canine, mandibular lateral incisor, and mandibular central incisor in males were significantly greater than those in females.
2. Mesiodistal diameters for males were significantly greater than for females, except for the maxillary first molar, mandibular central incisor, and mandibular second molar.
3. Judging from the mesiodistal cervical diameter of natural teeth, implants for selection should be increased from 3.0 mm to 8.0 mm in diameter and the difference in tooth cervical width by sex should be considered. Therefore, smaller steps in implant diameter are necessary for implant selection.