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Uticaj strukture ortodontskih žica na biokompatibilnost i percepciju bola tokom početne faze lečenja fiksnim aparatima : doktorska disertacija = Influence of structural properties of orthodontic wires on biocompatibility and pain perception at the beginning of treatment with fixed orthodontic appliances : doctoral dissertation
Marković, Evgenija
The aims of this study were: to investigate and compare pain perception of patients at the beginning of orthodontic treatment with fixed appliances after insertion of six different archwires; to ...examine alterations in Nickel (Ni) and Titanium (Ti) surface composition and morphology in as recived and retrieved archwires; to estabilish any possible connection between pain perception and structure of the nickel titanium (NiTi)alloy. The study group consisted of 189 orthodontic patients, 84 males and 105 females. Following insertion of 0.014" NiTi archwires from six different manufactures, wich was performed by random selection, a modified McGill pain questionnaire with VAS, comprising of questions regarding intensity, provocation, beginning, duration, quality of pain and analgesic consumption was given to each patient. As-received and retrieved archwires (after one month) were subject to SEM and EDS micro analyses. No significant differences were found between groups of patients with different archwires in terms of perception of pain. In all groups of patients, pain was provoked by chewing, perceived as a pressure starting after 6 hours, lasted 2 days and decreased without pain medication. SEM and EDS showed changes in Ni and Ti content in as-recived and retrieved archwires with visible alterations of alloy surface topography. Intraoral exposure of different NiTi archwires alters the content of Ni and Ti in surface layers as well as their morphology, but the relation to pain perception was not found.
Type of material - dissertation
; adult, serious
Publication and manufacture - Beograd : [E. S. Marković], 2013
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