AN ANALYSIS OF ORTHODONTIC MINISCREW STABILITY IN EXPERIMANTAL AND CLINICAL CASES

The aim of this research was an experimental and clinical study measuring stability of the orthodontic miniscrews “Turbo” (Russia) and “BioRay” (Taiwan). Four self-drilling orthodontic miniscrews of each manufacturer, i.e. “BioRay”, Taiwan, (10-mm length, 2-mm diameter) and “Turbo”, Russia, (9-mm length, 2-mm diameter), a total of 8 items, were inserted into native pig mandible sample. Their stability was estimated by torques using a dynamometer (Zahoransky AG, Germany). In the clinical study, 62 orthodontic miniscrews were used: 16 “Turbo” (Russia) and 46 “BioRay” (Taiwan). Their stability was clinically evaluated by the criterion of the presence or absence of mobility of the orthodontic miniscrew after the application of the load. It was established that the orthodontic miniscrew “Turbo” (Russia) were not inferior to “BioRay” (Taiwan) miniscrews in the primary stability, stability after 7 days under loading and in resistance to the load in clinical case. In this regard, Russian orthodontic mini-screws can be successfully applied in clinical practice as well as foreign counterparts for studies of primary stability and loads resistance in clinical conditions.

orthodontic miniscrew, pitch, thread angle, submalar ridge, mandible, osteointegration, primary stability, orthodontic miniscrew stability, insertion torque, loss of stability

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