When to Extract Mesiodens?
A 3-year-old boy with attention deficit and autism has several incipient caries.
Panoramic X-ray reveals that two of mesiodens (Fig.1 *) block eruption of the
upper central incisors (1), as compared to the lateral ones (2). When is
the best time to extract the mesiodens?
Hi Xin, I do believe that you will need to extract the supernumerary teeth.
It is a question of when. I think I would delay until this patient is old
enough to have half the permanent central incisors root formed-so that
extraction really does help them erupt. I wish I could just blink and have
them removed because I hate that 8 and 9 are already higher than 7 and 10.
I will send this case to two of my pediatric friends. Tim
Sunday, October 29, 2017 6:37 PM
I agree with you Tim about delaying the extraction decision of any
primary or supernumary teeth at this time and monitoring the development
of the root structures of the U 1's with a future decision on
extractions timing and then also a decision on pre-surgical orthodontic
brackets and wire progression to heavy wires to allow potentially same
day surgical exposing and bonding of the central incisors with forced
Of course that would be a decision to make at the time of the decision
of removal of the inverted supernumerary teeth...one surgery and monitor
or one surgery and planned bonding and forced eruption.
It would be optimal to obtain a 3D of the area likely about age 5-6 to
determine the actual position of the supernumerary teeth to the
permanent central incisors.
I have always been informed that there is a concern for iatrogenic
damage to the permanent teeth when there is minimal root formation.
I agree that it appears obvious that the supernumerary teeth are and
will likely continue to affect the position of the developing
centrals. However I don't believe this would develop into a scenario
that could not be managed in the early mixed dentition that would aid in
preventing a severe malalignment and spacing issue.
A 3 D view would be paramount at the "right" time.
I hope Hank thinks he taught me well...
GD Mick Mayhew October 29, 2017 at 8:48:19 PM EDT
CBCT taken on 11/03/2017 confirms the findings mentioned above (Fig.2-4).
These 2 supernumerary teeth are close palatally (Fig.3 (for UR1), 4 (UL1)).
Dear Dr. Shaughnessy: Thanks for forwarding the message. Since the mesiodens
are so superficial (palatally), iatrogenic damage will be minimal. If the
permanent tooth buds are popping out, they can be put back immediately without
too much ill effect. I may refer the case to a pediatric OMFS at Emory.
I cannot help doing it in my chair. Last week composite was done with
local anesthesia without too much hassle. Here is a case we discussed
several years ago (2).
It seems appropriate to me to have early intervention.
PA is taken 10 months later (Fig.5). The roots of the supernumerary teeth
(*) elongate, while the permanent centrals (1) have descended as the same level
as the laterals (2). The divergent centrals seem not be able to cause root
resorption of the deciduous ones. The parents have hesitated to accept
Xin Wei, DDS, PhD, MS 1st edition 10/27/2017, last revision