1. University of Naples “Federico II”
Italian Society of
Pediatric Dentistry
University of Naples “Federico II”
OPD 5.10
10th EAPD Interim Seminar and Workshop
April 20th – 22nd , 2017
Torino, Italy
 Analysis of therapy-time for the correction of anterior central upper incisor cross-bite
Maglitto M*, Caruso S**, Marano M*, Costagliola A*, Pellegrino G*** . .
*Department of Neuroscience, Reproductive and Oral Sciences, School of Pediatric Dentistry, Chair Professor: Prof. A. Ingenito, University of Naples, “Federico II”, Naples, Italy.
**Department of Life, Health & Environmental Sciences, University of L'Aquila, L'Aquila, Italy.
***Department of Neuroscience, Reproductive and Oral Sciences, School of Orthodontics, University
of Naples, “Federico II”, Naples, Italy.
AIM
The aim of this study is to evaluate the treatment-time to correct the cross-bite of an upper central incisor by using a preformed device (LM-Activator High Short).
STUDY DESIGN
The analysed sample consisted of 10 patients (5 males and 5 females) aged from 5,8 to 7,2 with a central incisor cross-bite.
The only instrumental test performed was OPT.
The device was used only at night (from after dinner to the following morning) and the average using time per night was 11 hours.
The average time of the treatment was 14 nights.
At the end of the treatment, the stabilization stage was set at 30 days, only at night.(Fig :clinical cases examples)
Fig. 1
Fig.2
Fig. 3
Fig. 4
T0. T0 T0 T0 T1 T1
LM-Activator High Short T1 T1
RESULTS
The study turned out to be successful as the correction was fast but not painful at all.
In particular, the use of the preformed device with a raised thickness in the rear area prevents vertical interference that may open the bite and corrects the morphology in the front area with enclosures with an inclined plane.
This may allow to alter the inclination
of the tooth in reverse.
CONCLUSION
In conclusion, the advantages of using a preformed device, in order to correct the cross-bite of a central incisor, are manifold. First of all, it is used at night and it requires no effort by the patient, secondly, it is extremely fast in correction and finally it allows to maintain results overtime, being no painful at all.
In addition, by using a preformed device, dental impressions are not necessary.
References:
Anna-Paulina Wiedel and Lars Bondemark (2015) Stability of anterior crossbite correction: A randomized controlled trial with a 2-year follow-up. The Angle Orthodontist: March 2015, Vol. 85, No. 2, pp
Wiedel, Anna-Paulina, et al. "A cost minimization analysis of early correction of anterior crossbite—a randomized controlled trial." The European Journal of Orthodontics 2016; 38 (2):  
Wiedel, Anna-Paulina, and Lars Bondemark. "Fixed versus removable orthodontic appliances to correct anterior crossbite in the mixed dentition—a randomized controlled trial." The European Journal of Orthodontics 37.2 (2015):