A.0.5mm厚的牙本質(zhì)可減少有毒物質(zhì)對(duì)牙髓的影響達(dá)75%；1.0mm厚的牙本質(zhì)可減少有毒物質(zhì)對(duì)牙髓的影響達(dá)90%；2.0mm厚的牙本質(zhì)則牙髓反應(yīng)很小
B.1.0mm厚的牙本質(zhì)可減少有毒物質(zhì)對(duì)牙髓的影響達(dá)75%；2.0mm厚的牙本質(zhì)可減少有毒物質(zhì)對(duì)牙髓的影響達(dá)90%；2.5mm厚的牙本質(zhì)則牙髓反應(yīng)很小
C.0.1mm厚的牙本質(zhì)可減少有毒物質(zhì)對(duì)牙髓的影響達(dá)75%；0.5mm厚的牙本質(zhì)可減少有毒物質(zhì)對(duì)牙髓的影響達(dá)90%；1.0mm厚的牙本質(zhì)則牙髓反應(yīng)很小
D.0.5mm厚的牙本質(zhì)可減少有毒物質(zhì)對(duì)牙髓的影響達(dá)90%；1.0mm厚的牙本質(zhì)可減少有毒物質(zhì)對(duì)牙髓的影響達(dá)95%；2.0mm厚的牙本質(zhì)則牙髓反應(yīng)很小
E.0.2mm厚的牙本質(zhì)可減少有毒物質(zhì)對(duì)牙髓的影響達(dá)75%；0.5mm厚的牙本質(zhì)可減少有毒物質(zhì)對(duì)牙髓的影響達(dá)90%；1.0mm厚的牙本質(zhì)則牙髓反應(yīng)很小