1.The deciduous tooth which has a large decayed part.
2.The deciduous tooth having an endodontic treatment get lower the strength of the tooth and it is prone to break,in this case, it needs to fitting a crown needs to protect a tooth.
3.In case dental decay happens in the occlusal surface.
4.In case the use of the restoration material, it is prone to break because of masticatory pressure and the frequency of the second decay.
- Upper right: UR2,UR3,UR4,UR5, UR6, UR