EVALUATION OF CEPHALOMETRIC ANALYSIS IN PATIENTS WITH BILATERAL CONDYLAR RETROPOSITION IN TEMPOROMANDIBULAR DYSFUNCTION

Abstract

Relevance. During the dentoalveolar growth and development, the direction and growth type of facial skull play a very important role. Development of esthetical symmetry, functional relationship, and clinical disharmony depends on skull parameters. Temporomandibular joint dysfunction is one of the most common diseases nowadays. That is why early identification of risk factors is among the priorities. This study aimed at evaluating occlusional and skeletal specific characteristics in patients with temporomandibular joint dysfunction, comparing different cephalometric findings and CT findings relating to condylar position. Materials and methods. The study included 45 individuals. The study group consisted of 26 patients with bilateral condylar retroposition. Control group was made up of 19 patients. The participants underwent clinical examination, functional testing, palpation of masticatory muscles, occlusion diagnosis by applying Baush articulating film 200,100,8 microns, cephalometric analysis: Tweed, Kim, Jarabak, Ricketts, computed tomography of temporomandibular joint. Statistical analysis was carried out by the program IBM SPSS Statistic Base v.22. Results. There were no pathological contacts during evaluation of static and dynamic occlusion, laterotrusion as «canine guidance». The patients of the test group had bilateral posterior joint fissure reduced right-median 1,96, left-median 1,81. In control group the position was right-average 2,75 and left-median 2,67 The patients in the control and test groups the indices Tweed <FMA average were 19,6°/ median 21,7°; <IMPA average 97,9°/ median 97,8°; Kim ODI median was 68,9°/73,74°; Ricketts Overbite median 2.1 mm /1,9 mm, Overjet median was 2,9 mm /2,85 mm, PM-Xi-ANS median was 44,1°/43,75°, <NPog-FH median was 91°/86,85°,<NBa-PtGn median was 91,1°/90,1°, <MeGo-FH median was 18,7°/22,4°; Jarabak <N-S-Ar average was 127,2°/125,6 °. Conclusions. In the patients with bilateral condylar retropositionm the joint fissure is reduced. Cephalometric analysis demonstrated the following: Tweed <FMA, <IMPA; Kim ODI; Ricketts Overbite, Overjet, PM-Xi-ANS, <MeGo-FH; Jarabak <N-S-Ar can not be used as diagnostic criteria of bilateral condylar retroposition. Ricketts <NPog-FH in the test group showed the mandibular retroposition, but with normal type of mandibular growth <NBa-PtGn. It can be used as one of the primary cephalometric diagnostic indicator of bilateral condylar retroposition.