教材用耳小骨封入標本の作製

INCLUSION OF OSSICULAR CHAIN SPECIMENS IN PLASTICS

　Ⅰ．はじめに

　人体の骨格の中で，耳小骨は形態的・機能的にきわめて特異なものであり，基礎・臨床両面の耳科学上に占める重要性は大きい。

　しかし耳小骨連鎖を構成するそれぞれの骨はきわめて小さく，かつ軽量であるため，これを講義室において学生・実習者に提示し，その複雑・繊細な形状を観察・会得させることにおいて，従来，幾多の難点が存在した。

　The following objects were specifically designed for teaching material to the medical students.

　Dried human auricular ossicles in their natural positions were bleached in 30% hydrogen peroxide solution and then, embedded in a good quality plastics. The plastic mass was shaped into a ball 5 cm in diameter, and the surface of which was polished with a good finish.

　The merits of the objects may be listed as follows :

　1. The objects may he observed in their natural situation because natural human auricular ossicles are employed.

　2. A permanent preservation of the objects is possible because they are embedded in heatproof and chemical-proof material.

　3. The objects are handy for use in the lecture room and easily observed by the students because of the magnifying effect of the plastic covering.