Open AccessCONNECTION BETWEEN CLINICAL AND RADIOLOGICAL TORQUE OF MEDIALINCISORS AT PHYSIOLOGICAL OCCL
Author(s) -
T.D. Dmitrienko,
Dmitry Domenyuk,
Mikhail Porfyriadis,
Anna Arutyunova,
Andrey Kondratyuk,
Roman I. Subbotin
Publication year - 2019
Publication title -
archiv euromedica
Language(s) - English
Resource type - Journals
eISSN - 2199-885X
pISSN - 2193-3863
DOI - 10.35630/2199-885x/2019/9/1/29
Subject(s) - protractor , orthodontics , dental occlusion , maxillary central incisor , crown (dentistry) , occlusion , dentistry , radiological weapon , incisor , medicine , torque , mathematics , geometry , physics , cardiology , radiology , thermodynamics
Aim. To determine the link between theclinical and radiological torque of the medial incisors incases with physiological occlusion.Materials and methods. A measurement of the clinicaltorque values was performed (whereas the torque is definedas the deviation of the tooth crown vestibular surface fromthe occlusal plane) in 98 people with physiological occlusionand a full set of permanent teeth. When measuring theclinical incisor torque, three methods were employed. Thefirst method allowed studying teeth torque in relation tothe occlusal plane on the cast jaw models using the ArcoZet equipment (by Scheu Dental GmbH). The secondmethod implied using a modified protractor, where themoving part was oriented in relation to the occlusal plane.The third method we used involved analyzing data fromteleradiography and cone-beam tomograms obtained withthe PaX-i3D SC digital panoramic X-ray unit (VATECHGlobal), which were marked with linear and angularreference points. The patients were divided into three groupsdepending on the incisors location: Group 1 includedpatients with the mesotrusive incisors location; Group 2were patients with physiological protrusion of the incisorsand a decrease in the interincisal angle, with Group 3including patients with physiological retrusion of incisors.Results. Regardless of the type of dental arches and thevestibular lingual inclination of the incisors, the averagedifference between the clinical and the radiologicalincisor torque values is 26°, which can be used in clinicalorthodontics to develop a treatment tactics and itseffectiveness in people with various gnathic and dental typesas well as with various dental arches.Conclusion. All methods used for measuring the teethinclination angles in the vestibular lingual direction canbe employed both in the applied and in the clinical aspect.Identifying the permanent teeth torque through cast modelsof dentition morphometry and through using specialequipment, takes a lot of effort, time, at the same timebeing subject to potential measurement errors. The methodsimplying analysis of cone-beam computed tomographyimages feature high-tech reliance, precision, whereas thereproductive capacity and interpretation of the resultsallows using the available angular and linear parameters forevaluating the effectiveness of the respective orthodonticprocedures through all the stages of treatment