ACJ Quiz – Post Placement

the post has to be at least the same size as the crown of the tooth and there has to be at least 3-4 mm Gutta perca remained at the end of the root.

the post in the distal root is a fiber post and it is acceptable.the crown is full porcelain (Emax) over a composite core.

In this case there is a metal prefabricated post that is short, so both options inappropriate post space prep and inappropriate post placement can be selected

In this X ray a prefabricated fiber post is placed on distal root of the tooth # 3.6. The post is short so both options A and B are correct

in this case there is a fiber post placed in the palatal root of the tooth # 1.6. Although there is a small gap between gutta pecha and the post, still it is in the acceptable range.

in this case although there is a J shape radiolucency in the canal, BUT the question is only asking about the post placement. The distal post which is the main post has the right size and placement. The post in the mesial canal although a little bit short and normally not indicated, but some concepts suggest placing a post in the second root for anti rotation ( although this concept is mostly for casting posts but there is no reference indicating that a prefabricated post used as anti rotation can be considered as a mistake.

the post in the tooth # 1.5 is a casting post which is short so both options can be selected

This is a particular case, in this case, size and length of the post is proper but the post space preparation is 2 mm more than post that is placed, this gap is not acceptable and the option inappropriate post space prep can be selected separately.

the tooth 1.5 shows a casting post that is short, both options A and B can be selected

the tooth 4.2 shows a casting post that is short, both options A and B can be selected

the tooth 1.1 shows a casting post that is short, both options A and B can be selected

in this case, size and length of the post is proper but the post space preparation is 2 mm more than post that is placed, this gap is not acceptable and the option inappropriate post space prep can be selected separately.

this is a very larg size pose, not enough gutta remained at the tip of the tooth and unnecessary tooth structure is removed for this post placement

) this is a casting post, the post space is prepared too thick which can break the tooth.

there is no post in the X ray, it is amalgam in the canal (amalgapost) so no options for post should be selected

this is a casting post and core, although the core design is not the best but the question is asking about the post, and the post size and length is acceptable.

although the bone loss can indicat root fracture but the question is asking about the post placement that seems acceptable.the gap is less than 1 mm and is acceptable

the post in the tooth # 1.1 is a fiber post, everything is ok with this post.

the post in the tooth # 4.6 is a metal post and is acceptable

there is no post in tooth # 2.5 as it is amalgacore extending in the canals

) in this case inappropriate post placement is noreder line, but as there is a huge gap between post space prep and tip of the post the option A can be selected

there is a fiber post in the tooth # 1.4 as it is short the option C can be selected

in this case a fiber post and a composite build up can be seen in the tooth # 1.1 that is acceptable, the radiopacity is very close to the gutta percha but we have to pay attention that fiber posts have different opacities and sometimes can resemble gutta percha and needs attention.