www.sbdmj.com - Stomatologija - Baltic Dental and Maxillofacial Journal

Stomatologija 2018; 20 (3): 96-101 470 KB

Evaluation of the posterior maxillary teeth movements during Class II correction: 3-dimensional superimposition of casts

Igor Griblasky¹, Dalia Latkauskiene², Gundega Jakobsone¹

Summary

Aim and objectives. The aim of this study was to analyze the changes of the posterior dentition during Class II correction with the crown Herbst appliance (cHerbst) and intermaxillary Class II elastics. Sample. Class II patients were divided into 2 groups: those who were treated with the cHerbst appliances (n=40, mean age 14.1±1.3) and those who were treated with fixed appliances and Class II elastics (n = 20, mean age 16.7±2.7).

Materials and methods. The scans of pre- and post-treatment casts the patients were superimposed and registered using the freeware Blender 2.67. The linear measurements in the anteroposterior, transversal and vertical planes along with the rotation angles of the first molars were assessed.

Results. In the cHerbst group clinically significant derotation (13.8±5.0°) and distalization (3.2±1.2 mm) of the upper first molars were recorded compared to the intermaxillary Class II elastics group (4.2±5.5°, -0.3±1.5, respectively). In the cHerbst group the second and first premolars followed the distal movements of the upper first molars. The premolars expanded slightly more than the molars in both groups. The posterior teeth extruded in both groups, except the molars in the cHerbst group.

Conclusions. The crown Herbst appliance is significantly more effective in molar derotation and distalization than intermaxillary Class II elastics.

Key words: Class II treatment, Class II elastics, Herbst appliance, cast scans.

Received: 04 08 2017

Accepted for publishing: 20 09 2018

¹Department of Orthodontics, Institute of Stomatology, Riga Stradins University, Riga, Latvia

²Private practice, Kaunas, Lithuania

Correspondence to: Gundega Jakobsone, Department of Orthodontics, Institute of Stomatology, Riga Stradins University, Dzirciema street 20, Riga LV 1007, Latvia.

E-mail address: g.jakobsone@latnet.lv



	Baltic Dental and Maxillofacial Journal

September, 2018, Vol. 20, No. 3 CONTENTS REVIEWS Comparison of skeletal anchorage distalizers effect in maxillary buccal segment: A systematic review Lior Levin, Arūnas Vasiliauskas, Juste Armalaite, Kristina Kubiliute 66-72 Dental roots’ and surrounding structures’ response after contact with orthodontic mini implants: A systematic literature review Greta Gintautaitė, Giedrius Kenstavičius, Alė Gaidytė 73-81 SCIENTIFIC ARTICLES Correlation of temporomandibular joint clinical signs with cone beam computed tomography radiologic features in juvenile idiopathic arthritis patients Ilga Urtane, Iveta Jankovska, Hadeel Al-Shwaikh, Zane Krisjane 82-89 Relationship between unilateral posterior crossbite and mandibular asymmetry during late adolescence Kristina Lopatienė, Karolina Trumpytė 90-95 Evaluation of the posterior maxillary teeth movements during Class II correction: 3-dimensional superimposition of casts Igor Griblasky, Dalia Latkauskiene, Gundega Jakobsone 96-101 CASE REPORT Maxillary Central Incisor Root Resorption due to Canine Impaction after Trauma. Is the Canine Substitution for Maxillary Incisors a suitable Treatment Option? Two Case Reports Cinzia Maspero, Andrea Fama, Guido Galbiati, Lucia Giannini, Laima Kairyte, Luca Bartorelli, Marco Farronato 102-108 © 2018 Stomatologija		Stomatologija 2018; 20 (3): 96-101 470 KB Evaluation of the posterior maxillary teeth movements during Class II correction: 3-dimensional superimposition of casts Igor Griblasky¹, Dalia Latkauskiene², Gundega Jakobsone¹ Summary Aim and objectives. The aim of this study was to analyze the changes of the posterior dentition during Class II correction with the crown Herbst appliance (cHerbst) and intermaxillary Class II elastics. Sample. Class II patients were divided into 2 groups: those who were treated with the cHerbst appliances (n=40, mean age 14.1±1.3) and those who were treated with fixed appliances and Class II elastics (n = 20, mean age 16.7±2.7). Materials and methods. The scans of pre- and post-treatment casts the patients were superimposed and registered using the freeware Blender 2.67. The linear measurements in the anteroposterior, transversal and vertical planes along with the rotation angles of the first molars were assessed. Results. In the cHerbst group clinically significant derotation (13.8±5.0°) and distalization (3.2±1.2 mm) of the upper first molars were recorded compared to the intermaxillary Class II elastics group (4.2±5.5°, -0.3±1.5, respectively). In the cHerbst group the second and first premolars followed the distal movements of the upper first molars. The premolars expanded slightly more than the molars in both groups. The posterior teeth extruded in both groups, except the molars in the cHerbst group. Conclusions. The crown Herbst appliance is significantly more effective in molar derotation and distalization than intermaxillary Class II elastics. Key words: Class II treatment, Class II elastics, Herbst appliance, cast scans. Received: 04 08 2017 Accepted for publishing: 20 09 2018 ¹Department of Orthodontics, Institute of Stomatology, Riga Stradins University, Riga, Latvia ²Private practice, Kaunas, Lithuania Correspondence to: Gundega Jakobsone, Department of Orthodontics, Institute of Stomatology, Riga Stradins University, Dzirciema street 20, Riga LV 1007, Latvia. E-mail address: g.jakobsone@latnet.lv