Author :
Saurabh Sonar, Ravinder Yadav, Ashish Chopra,Puneet Batra
Volume :
1
Issue :
1
Abstract :
Objective: This study was done to evaluate the effect of mini implant anchorage to control lower incisor inclination in
treatment of Class II malocclusion with fixed functional appliance.
Materials and Method: 20 patients (12 males and 8 females) with Class II div 1 malocclusion with a mean age of 19.23
2.42 years were selected and randomly divided in two groups. All patients were treated using 0.022"(MBT) with Forsus
fatigue resistant device (3M Unitek). Group I consisted of 10 patients treated with Forsus fatigue resistant device (FRD)
and Group II consisted of 10 patients treated with Forsus fatigue resistant device and miniscrew implant for anchorage
(FMI). Lower incisor inclinations were measured on the lateral cephalograms and the data was statistically analyzed.
Results: The mean degree of lower incisor inclination at pre functional (T0) for FRD group was ; L1 to NB : 28.80o ±
3.79oand IMPA 97.10o ± 5.32o. At post functional stage (T1) L1 to NB was 36.00o ± 4.13oand IMPA 107.8o ± 6.51o.The mean
degree of lower incisor inclination at pre functional (T0) for FMI group was ; L1 to NB : 25.20o ± 4.39oand IMPA 97.60o ±
6.14o .At post functional stage (T1) L1 to NB was 28.20o ± 2.39oand IMPA 102.0o ± 7.68o.The results showed that there
was statistically highly significant increase in the inclination of the lower incisors in the FRD group compared to the FMI
group (p=0.001).
Conclusion: Miniscrew implant anchorage is effective in minimizing the lower incisor proclination associated with fixed
functional appliance treatment in Class II malocclusion.