Access restricted to higher education institution's students and staff
master's thesis
Stability of orthodontic mini-implants

Domen Novšak (2012)
Metadata
TitleStabilnost ortodontskih miniimplantata
AuthorDomen Novšak
Mentor(s)Stjepan Špalj (thesis advisor)
Abstract
Svrha: Cilj ovog istraživanja je bio utvrditi u kojoj mjeri biomehanički čimbenici - debljina kompakte, promjer i dužina miniimplantata, metoda uvrtanja te komponente vertikalne implantacijske sile utječu na primarnu stabilnost miniimplantata. Materijali i metode: Testirano je šest tipova cilindričnih samobušećih miniimplantata Dual Top (Jeil Medical Corp., Seul, Koreja) promjera 1.4, 1.6 i 2.0 mm, dužine 6 i 8 mm uvrtanih ručno i strojno u uzorke svinjskih rebara bez pilot rupe. Mjereni su debljina kompakte pomoću pomične mjerke te okretni moment i vertikalna sila tijekom implantacije pomoću specijalnog dizajniranog uređaja povezanog s osciloskopom. Maksimalni implantacijski okretni moment rabljen je kao mjera primarne stabilnosti. U statističkoj analizi korištene su analiza kovarijance i Sidak post - hoc test te multipla hijerarhijska linearna regresijska analiza. Rezultati: Statistički značajni prediktori bolje primarne stabilnosti ortodontskih miniimplantata su veća debljina kompakte (objašnjava 24.2% varijabilnosti), veći promjer miniimplantata (20.6%), ručni način uvrtanja (9.9%), veća dužina miniimplantata (3.7%), veća maksimalna vertikalna sila (2.2%) te manja vertikalna sila pri maksimalnom okretnom momentu (1.4%). Cijeli model opisuje 61.5% varijabilnosti primarne stabilnosti. Zaključci: Na primarnu stabilnost miniimplantata najviše utječu debljina kompakte i promjer miniimplantata te način uvrtanja, dok dužina implantata i komponente vertikalne sile imaju manji utjecaj.
KeywordsMini-implant Miniscrew TAD Insertion torque Diameter Length Vertical force Insertion mode
Parallel title (English)Stability of orthodontic mini-implants
Committee MembersStjepan Špalj
Vladimir Ahel
Danko Bakarčić
GranterSveučilište u Rijeci
Medicinski fakultet
Lower level organizational unitsKatedra za ortodonciju
PlaceRijeka
StateCroatia
Scientific field, discipline, subdisciplineBIOMEDICINE AND HEALTHCARE
Dental Medicine
Orthodontics
Study programme typeuniversity
Study levelintegrated undergraduate and graduate
Study programmeDental Medicine
Academic title abbreviationdr. med. dent.
Genremaster's thesis
Language Croatian
Defense date2012-11-30
Parallel abstract (English)
Objective: The aim of this study was to determine predictive values of biomechanical factors influencing primary stability of mini-implants: compacta thickness, mini-implant diameter and length, method of insertion, and components of vertical insertion force. Materials and Methods: Six different types of cylindrical self-drilling mini-implants Dual Top (Jeil Medical Corp., Seoul, Korea) with diameters of 1.4, 1.6 and 2.0 mm and lengths of 6 and 8 mm were manually (hand-driven) and mechanically (machine-driven) inserted into the swine ribs bone samples without pre-drilling a guiding hole. Compacta thickness was measured with sliding caliper, while insertion torque and vertical insertion force were recorded with specially designed device connected with oscilloscope. Maximal insertion torque was used as a measure of primary stability. Analyses of covariance, Sidak post – hoc test and hierarchical multiple linear regression analysis were used in statistical analysis. Results: Statistically significant predictors of better primary stability of orthodontic mini-implants are thicker compacta (explaining for 24.2% of variability), wider diameter of mini-implant (20.6%), manual insertion (9.9%), greater length of mini-implant (3.7%), higher maximal vertical insertion force (2.2%), and lower vertical force at maximal insertion torque (1.4%). A total of 61.5% of variability of primary stability is explained by this model. Conclusions: Compacta thickness, mini-implant diameter, and manual insertion have higher impact on the primary stability of orthodontic mini-implants, while mini-implant length and components of vertical insertion force have lower impact.
Parallel keywords (Croatian)miniimplantat implantacijski okretni moment promjer dužina vertikalna sila način implantacije
Resource typetext
Access conditionAccess restricted to higher education institution's students and staff
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:184:078403
CommitterBosa Licul