TO JUSTIFY A DIFFERENTIATED APPROACH TO PRESERVATION OF THIRD MOLARS DURING ORTHODONTIC TREATMENT BY DETERMINING THEIR CONDITION AND POSITION IN THE JAW

No tooth is as problematic for patients it third molars. After erupting later than all teeth, they often have little space in the dentition, or rather retromolar space, which should appear, above all, with further growth of jaws. Therefore, timing their eruption varies considerably and accompanied by appearance significant morphological functional disorders. That why necessary to take a balanced approach preservation molars dental arch, providing them place timely detecting condition position jawbones thus preserving integrity dentition implementing fourth last stage bite raising orthodontic anomalies.
 The purpose study. To substantiate differentiated treatment determining jaw.
 Material methods research. For this purpose, 44 aged 15-30 years different dentofacial anomalies having full permanent including confirmed clinical X-ray data were examined given treatment. Additional study included analysis diagnostic model measurements (by Pont Korkhaus method). Furthermore, was measured find out if there row teeth measuring its length height using silicone index S.I. Doroshenko Ye.A. Kulhinskyi's method, 2009). studies orthopantomograms (OPG), teleradiography (TRG), computed tomography (CT) scan, etc. OPG conducted K.V. Storozhenko's method (2013) involved inclination especially second relative jaw base. showed lack (2009). Measurement processed mathematical statistics. mean confidence interval sample calculated according GOST R 8.736 – 2011.
 Results. variability base on both sides jaws (on left right). largest difference inclinations observed lower (LJ) right, an insignificant deviation 0.3° ± 0.2°, least upper (UJ), left, but larger 3.6° 0.2°.
 suggested that ones is, more since erupt later. Lower incline medially at crowns therefore smaller angle LJ While distally crown increased UJ In years, 106 (60.2%) retention, 35 (33.1%) physiological retention younger people, 40 (37,7%) half-retention, 31 (29.2%) constant retention.
 An important factor predicting became presence sagittally vertically. i. e. sagittally, 25 (14.2%) 176 molars: 15 (8.5%) molars, 7 (4.0%), right 8 (4.5%) teeth; 10 (5.7%) 6 (3.4%) 4 (2.3%) respectively.
 also depended width equator, appeared be smallest varied from mm 11.7 mm, 12 19 14.17 mm. Differences means between not detected (11.8 11.8 respectively), (14.2 14.1 mm). individual cases, 2.0-4.0 1.0 LJ. latter confirms some scientists’ conclusions sizes vary widely.
 Retention subjects associated most commonly reported 17 (38.6%) distal occlusion (class ІІ) 13 (29.5%) persons deep occlusion, rarely seen medial ІІІ) (9.1%) open (9.1%).
 Clinical when selecting tactic retained apart sagittal determine size vertical indexes. Persons had narrowest alveolar 0.5 while those neutral 5 mm.
 Thus, importance during