engleski

HINGE AXIS - HOBO POINT - FRANKFORTH HORIZONTAL RELATIONS

Aim of this investigation was to determine the spatlai relations of the Terminal hinge axis of the temporomandibular joints toward and Frankforfi horizontal. The sample consists of 50 exominees. Terminal hinge axis was located, using Lauritzen's Technique, on the left side of foce for each examinee. Arbitrary point, as proposed by Sumia Hobo, was measured and point Orbitale was defined by palpation. On designated points steel pellets 0.25 mm In diameter were slicked. Lathero - latheral cephalogram was obtained for each examinee. Cephalograms were traced down on a transparent foil and points Orbitale. THA - terminal hinge axis, Hobo and Porion - as the uppermost point of the metal ear rod of the cephalostat, were designated. Connecting points Orbitale and Porion, Frankforth horizontal was defined, and shortest distance toward points THA and Hobo, as well as between them were measured. Vnes parallel and perpendicular to Frankforth horizontal were drawn through point THA. In a coordinate system defined in such a way, upper left quadrant was first, upper right second, lower right third, and lower left was fourth. Observation was made in which quadrant Hobo point was located. Measured values were statistically evaluated. Results revealed that Hobo oolnt is located in first quadrant in 5 cases In second In 7 third Quadrant in 18 and in fourth in 20 cases That mean that Hobo point Is located lower to the THA point In maloritv of our oooulation. Points THA and Hobo were not identical in anv case

TMJ

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