Muller M, Berytrand M F, Quatrehomme G, Bolla M, Rocca J P
Laboratoire de Biomatériaux Dentaires et d'Odontologie Expérimentale, Faculté de Chirurgie Dentaire, Nice, France.
J Forensic Odontostomatol. 1998 Jun;16(1):1-7.
Fifty-eight premolars, extracted for orthodontic reasons, were incinerated for one hour in a furnace at temperatures varying from 150 degrees C to 1150 degrees C, increasing at 100 degrees C intervals. Between 150 degrees C and 700 degrees C the teeth changed from light yellow to bluish-white passing through brown. The scanning electron microscope showed that at 150 degrees C cracks appeared in the enamel, increasing in number as the temperature rose. At 450 degrees C the internal surface detached from the dentine and showed the same cracked surface as the exterior. Above 1100 degrees C the enamel fragments had a prismatic structure difficult to identify due to their melted structure. Dentine retained its tubular structure up to 1150 degrees C even when the tubules' diameter decreased at 700 degrees C. The cementum cracked as the temperature increased. Certain cracked areas actually detached at 600 degrees C giving a corroded aspect to the cementum and the residual zones became irregular when the temperature rose and eventually at 1150 degrees C the cementum was no longer identifiable.
58颗因正畸原因拔除的前磨牙在炉中于150摄氏度至1150摄氏度的温度下焚烧1小时，温度以100摄氏度的间隔递增。在150摄氏度至700摄氏度之间，牙齿颜色从浅黄色变为蓝白色，中间经过棕色。扫描电子显微镜显示，在150摄氏度时牙釉质出现裂纹，随着温度升高裂纹数量增加。在450摄氏度时，内表面与牙本质分离，呈现出与外表面相同的裂纹表面。高于1100摄氏度时，牙釉质碎片具有棱柱结构，由于其熔化结构难以辨认。牙本质在1150摄氏度之前都保持其管状结构，即使在700摄氏度时小管直径减小。随着温度升高，牙骨质出现裂纹。在600摄氏度时，某些裂纹区域实际上会分离，使牙骨质呈现出腐蚀的外观，当温度升高时，残留区域变得不规则，最终在1150摄氏度时牙骨质无法辨认。
