Tuesday, May 26, 2009

Fusion



So one of these teeth is not like the other..... What is it?? Fusion of the mandibular right lateral incisor and canine (QR fusion). This picture is of my cousin's little girl. My cousin came up to me at a family party and said, "Look at her teeth, I can't floss between them!" I was excited the moment I saw it because I had just had a course on dental anomalies and I knew what it was. It is pretty cool when you are a first year dental student and you get opportunities to apply what you learned in the class room to a more clinical setting. Street Cred....

Anyways, "Fusion" is the union of two tooth buds during their development way before the teeth poke through the gums. You can see in the image how it appears the lateral incisor and the canine kind of grew into each other during development. This should not be confused for "gemination" which is when a tooth bud partially splits during development resulting in a large/wide tooth, frequently with a vertical line running inciso-apically. The two anomalies can look very similar. To determine if it is gemination or fusion, you need to know how many teeth should be in the mouth, you can tell how there should be a canine and a lateral incisor between that molar and the central incisor. This tells us that two teeth merged. Pretty cool huh? Well I ran this photo by a professor at school and he did not think there were any implications of abnormalities that would present in the permanent dentition. In otherwords, she'll lose the tooth, permanent teeth will grow in and everything should be good. So the real question is when she looses the tooth, does she get double payment from the tooth fairy? You decide...

5 comments:

Jody Weiss said...

Jonathan, you're funny. And a good writer! I enjoy reading your dental stuff and it's great to see your enthusiasm for your continuing education and career path. Who's kid is it?

Amy and Bryan said...

What's up Jon? You don't know me but my name's Bryan Clevenger and I'm finishing up my undergrad and just applied to Midwestern. I was wondering if you'd be willing to give me your email so I could ask you a few questions about the school. My email is trifectab43@hotmail.com. If you don't have time it's all good.
Thanks

Tyler and Kendyl said...

Daisy has some sweet teeth hehe! I'm happy to hear that it wont be a permanent thing.

Rachel Inbar said...

Was just checking out tooth pictures - my son has a geminated front tooth. Surprisingly, it's really not so noticeable.

We take extra-good care of it, because it seems like the kind of tooth that could become decayed easily.

You can see pictures here - http://www.fertilitystories.com/fertilityblog/2009/02/gemination-or-fusion.html

rae said...

Jon, my 9year old son has a fused tooth exactly like the one in the photo,same teeth,shape,position-everything. He recently lost the tooth and it did have 2 holes where the roots were...and yes he received double the going rate(i think it was $8 or so),it is after all two teeth as he pointed out. the xrays showed only one tooth to replace the two and so far it is just a large eye tooth coming up.My husband and I both have very crowded teeth so we are hoping that he'll have some extra room because of it. Thanks for the great info about tooth fusion and
gemini teeth-i have looked for info for a few years and your has been the most helpful.
rae.