Friday, July 26, 2013

Gemination and Fusion (Gemination vs Fusion)


Gemination

 


Gemination is when a tooth bud attempts to split in two during development. (ie:  Attempting to form another tooth.)  The tooth will appear larger than a normal tooth.




 




Gemination of Deciduous Tooth #D. 

Gemination is when a tooth bud attempts to split in two during development. (ie:  Attempting to form another tooth.)  The tooth will appear larger than a normal tooth.

 

 

 

 

 

Fusion

Below is a small occlusal xray of the maxillary arch and in the larger occlusal xray of the mandibular arch you'll notice the fused #N-O.  Notice the two separate pulp chambers.

 
 
 
 

 

Fusion or Gemination?  You decide.

 



Fusion of Permanent Teeth #25-26 or is it Gemination?

 

 In the above picture and x-ray, my first thought is gemination because there are two pulp chambers but only one canal. but I was taught that the tooth count should be normal in a gemination case.  So if there are only three incisors I would have to conclude that this is a case of tooth fusion.  Any thoughts or opinions?

 
 
 

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