Influence of the Hinge Axis Transfer Modality on the ThreeDimensional Condylar Shift Between the Centric Relation and the Maximum Intercuspation Positions

Abstract

Adresa za dopisivanjeRobert Ćelić Sveučilište u Zagrebu Stomatološki fakultet Zavod za mobilnu protetiku Gundulićeva 5, 10 000 Zagreb Tel: 1 4802 111 celic@sfzg.hr Sažetak Svrha: Željelo se odrediti utječe li način registracije i prijenosa šarnirske osi (prijenos obraznim lukom spram prosječnog montiranja) s ispitanika u artikulator na trodimenzionalni pomak kondila između položaja centrične relacije (CR) i maksimalne interkuspidacije (MI). Materijal i metode: U istraživanju su sudjelovala 32 potpuno ozubljena ispitanika (16 muškaraca i 16 žena). Inkluzijski kriteriji studije obuhvatili su asimptomatske ispitanike s normalnim okluzijskim odnosima (Angleova klasa I) u dobi od 20 do 33 godine (prosječna dob 22,6 ± 4,7 godina). Trodimenzionalni pomak kondila (anteroposteriorni, superoinferiorni i mediolateralni) između položaja centrične relacije (CR) i maksimalne interkuspidacije (MI) bio je analiziran upotrebom indikatora položaja mandibule (MPI, SAM Prazisionstechnik GmbH, München, Njemačka). Rezultati: Prosječni trodimenzionalni pomak kondila iznosio je 0,13 ± 0,12 milimetara za prijenos obraznim lukom i 0,22 ± 0,23 milimetra za prosječno montiranje. Nisu zabilježene statistički značajne razlike između spolova. Rezultati Mann-Whitneyjeva testa pokazali su statistički značajne razlike za anteroposteriorni i superoinferiorni pomak kondila (P < 0,001). Razlika u mediolateralnom pomaku nije bila statistički značajna. Zaključak: S obzirom na odstupanja unutar trodimenzionalnog pomaka kondila, prijenos obraznim lukom pokazao se točnijim u odnosu prema prosječnom montiranju u poluprilagodljivi artikulator. No prosječne vrijednosti trodimenzionalnog pomaka kondila nisu odstupale od normalnih vrijednosti, pa nemaju kliničko značenje. Prema tome, pouzdanima se mogu smatrati oba načina prijenosa (prijenos obraznim lukom i prosječno montiranje) kod asimptomatskih ispitanika s normalnom okluzijom.Ključne riječi artikulatori; centrična relacija; zglobna osovina; prijenos obraznim lukom 1 Dom zdravlja Zagreb zapad, Albaharijeva 5, 10000 ZagrebHealth center Zagreb west,

Three‐dimensional morphological and positional analysis of the temporomandibular joint in adults with posterior crossbite: A cross‐sectional comparative study

“…Dimensional measurements of the TMJ joint spaces were considered indicative of condyle movement potential 44 . The PJS was greater than the AJS in all three groups except the crossbite side of the UCG, and the SJS was the largest joint space in all three groups, which is in agreement with Leonardi et al 23 In the UCG, the AJS was slightly smaller on the non‐crossbite side, and the SJS was slightly larger on the non‐crossbite side.…”

Three‐dimensional analysis of mandibular morphology asymmetry and temporomandibular joint position in patients with unilateral Brodie bite

“…It has been suggested that the position of the condyles concerning the posterior walls of the glenoid fossa is more asymmetric in unilateral malocclusion than normal occlusion 36 . The dimension of TMJ joint space can be indicative of the condylar movement potential 37 . A most recent study showed that the patients with unilateral chewing preference had more anterior condyles than those without, 38 which might account for our findings.…”

“…36 The dimension of TMJ joint space can be indicative of the condylar movement potential. 37 A most recent study showed that the patients with unilateral chewing preference had more anterior condyles than those without, 38 which might account for our findings. To enhance the accuracy and reliability of our results, we assessed the relative condylar position within the mandibular fossa using another method and obtained the same results.…”

A proposed novel digital condylar position adjustment technique to help restore a normal disc-condyle relationship

“…This requires the use of a facebow and an articulator to record the patient's occlusal relationship, which is called occlusal transfer. The spatial relationship of the maxilla and mandible can be recorded and adjusted in vitro [ 6 ]. The clinical importance of the use of facebows is controversial because there is no evidence to support that their use leads to better clinical outcomes [ 7 ].…”