AIM: To detect post-treatment change in the inclination and position of incisors in cases treated with orthodontic non-extraction therapy. MATERIALS AND METHODS: The group consisted of 102 patients without extractions in lower and upper dental arch during orthodontic treatment. Cephalogram examination evaluated the position of the lower incisor to point A by Downs-pogonion line (-1 to APo) and inclination of the lower incisor to mandibular line (-1 to ML), position of the upper incisor to nasion-pogonion line (+1 to NPo), inclination of the upper incisor to nasion-sella line (+1 to NS) and the size of the inter-incisival angle between upper and central lower incisor (-1 to +1). RESULTS: In 58 % of cases, the difference in post-treatment and pre-treatment changes in the position of the (-1 to Apo) was within ± 2 mm, which we considered stable. Statistically signifi cantly higher values after treatment were in unstable rather than in stable cases with values (-1 to Apo), (-1 to ML), (+1 to NPo). Statistically signifi cantly lower value after the treatment was measured in unstable cases rather than in stable cases with a value (-1 to +1). There was no statistically signifi cantly different value in stable and unstable cases after treatment in values (+1 to NS). CONCLUSION: The number of stable post-treatment cases was only 16 % higher than the number of unstable cases. With the increasing value (-1 to Apo), the value (-1 to ML) and (+1 to NPo) increased, the value (+1 to -1) decreased. The value (-1 to NS) not after treatment was not statistically signifi cantly different in stable and unstable cases (Tab. 6, Fig. 4, Ref. 27). Text in PDF www.elis.sk.

Using PAR index / Peer Assessment Rating Index / effectiveness of orthodontic treatment was assessed in the group of patients treated with fixed and removable appliances. The group consisted of 83 patients after the end of the active phase of treatment. 34 patients were treated with removable appliances and 49 patients were treated with fixed appliances. Patients came from three orthodontic workplaces in Slovakia. In individual patients, treatment was initiated between 1st January 2010 to 31 December 2012. Measurement was carried out in dental casts made before and after the active phase of treatment using PAR meter. Results of measurement were recorded in the charts. It follows from the results of measurement that effectiveness and quality of treatment with fixed appliances was higher than in patients treated with removable appliances. In some cases of treatment with removable appliances resulting in minimal improvement, it was necessary to continue intreatment with fixed appliance.