齿质

除了V，抹香鲸齿质对海产动物（干质量）的其他9种元素都没有富集作用。

Except element V , the other nine elements in the sea organisms aren 't accumulated by dentinal GLGs .

巨型抹香鲸齿质层元素分析

Analysis on elements in teeth dentin layers of sperm whale Physeter macrocephalus

因此前牙做牙冠及柱心冠心，主要是为了美观问题，或是因为齿质剩下太少的缘故。

Heart and Crown of anterior teeth Crown and columns , mainly to appearance issues , or because ivory leaving too little reason .

在做根管治疗时，齿质的去除愈保守愈好，以便保留多一些齿质。

When do root canal treatment , removal of tooth mass and the more conservative , the better to keep the more ivory .

根据对牙齿磨片牙骨质和牙齿齿质上的生长层组判断，其年龄约为29龄。

Based upon the growth layer groups in cementum and dentine of the tooth , the age of the huge Sperm Whale was estimated at 29 years .

对于前牙而言，若保留的齿质够多，做完根管治疗后可以考虑不做假牙，简单的填补即可。

For the front teeth , if of tooth mass enough to keep , can consider not doing false teeth after root canal therapy done , simple filling .

要做这两种牙冠，需要修磨掉的齿质较多，牙齿齿质会丧失较多，此时就需要做柱心与冠心了。

To do either of the two crowns , need more grinding out of ivory teeth tooth mass will lose more , column heart and coronary heart needs to be done at this time .

当牙齿的齿质剩下不多时候，若要做牙冠，则必须在牙根内打钉子，做上冠心，以做出牙齿必要的假牙支撑部分。

When the ivory of teeth not much time left , to Crown , you must hit the nail in the teeth , coronary heart on doing , necessary to make teeth denture supporting parts .

做完根管治疗的牙齿，牙医师通常会建议做牙冠套起来，而做完治疗的牙齿，齿质保留的多寡，也影响是否需做柱心。

Done root canal treated teeth , dentists will advise the Crown usually set up and finished the treatment of teeth , tooth mass amount of reservation , also affect whether column needs to be done .