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master's thesis
Novi sustav zaključavanja za kutno stabilne pločice
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2019. urn:nbn:hr:235:080105
Adamović, Petra
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Adamović, P. (2019). Novi sustav zaključavanja za kutno stabilne pločice (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:080105

Adamović, Petra. "Novi sustav zaključavanja za kutno stabilne pločice." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2019. https://urn.nsk.hr/urn:nbn:hr:235:080105

Adamović, Petra. "Novi sustav zaključavanja za kutno stabilne pločice." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2019. https://urn.nsk.hr/urn:nbn:hr:235:080105

Adamović, P. (2019). 'Novi sustav zaključavanja za kutno stabilne pločice', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 12 April 2025, https://urn.nsk.hr/urn:nbn:hr:235:080105

Adamović P. Novi sustav zaključavanja za kutno stabilne pločice [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2019 [cited 2025 April 12] Available at: https://urn.nsk.hr/urn:nbn:hr:235:080105

P. Adamović, "Novi sustav zaključavanja za kutno stabilne pločice", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:235:080105

Metadata
TitleNovi sustav zaključavanja za kutno stabilne pločice
Title (english)A novel locking system for angular stable plates
AuthorPetra Adamović
MentorJanoš Kodvanj (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2019-07-12, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
General Mechanical Engineering (Construction)
Abstract
Kod liječenja prijeloma stabilnost osteosinteze od posebne je važnosti za dobar ishod liječenja. Ovisno o lokaciji i vrsti prijeloma stabilnost se postiže imobilizacijskom udlagom, vanjskom fiksacijom, intramedularnom fiksacijom, kompresijskim pločicama ili pločicama na zaključavanje. Prijelomi se danas uglavnom liječe otvorenom repozicijom i unutarnjom fiksacijom pločicama na zaključavanje. Čvrsta veza između vijka i pločice postiže se posebno oblikovanom glavom vijka i provrta u pločici.... More Poliaksijalnost vijaka osigurava veću biomehaničku stabilnost sustava kost-pločica-vijak, što rezultira očuvanjem biološkog integriteta kosti, bržim cijeljenjem i posljedično manjim brojem postoperativnih komplikacija. U ovom radu provedeno je ispitivanje funkcionalnosti novog sustava zaključavanja vijka u pločici i sustava koji je prema stanju tehnike sličan novom rješenju i koristi se u kirurškoj praksi. Ispitivanja računalnim simulacijama pri statičkom i cikličkom opterećenju provedena su i eksperimentalno za četiri kuta otklona osi vijka u odnosu na os provrta u pločici. Rezultati računalnih simulacija metodom konačnih elemenata su pokazali da su naprezanja kod aksijalnog tlačnog opterećenja vijka neznatno veća kod vijka i pločice kontrolnog modela. Pri savijanju vijka naprezanja u vijku su veća kod kontrolnog modela, a u pločici kod novog sustava zaključavanja. Pomaci su kod oba opterećenja veći na vijku novog sustava zaključavanja. Rezultati cikličkih ispitivanja savijanjem vijka zaključanog u pločici su pokazali da kod sva četiri položaja vijka nema statistički značajne razlike u pomacima između novog i kontrolnog sustava zaključavanja. Rezultati statičkog testa istiskivanja su pokazali da je pri aksijalnom opterećenju vijka zaključanog okomito na pločicu maksimalna sila koja dovodi do popuštanja veze između glave vijka i provrta u pločici statistički značajno veća kod kontrolnog sustava zaključavanja. Less
Abstract (english)
In treating fractures, osteosynthesis is of particular importance for a good outcome of the treatment. Depending on the location and type of the fracture, stability is achieved by immobilization, external fixation, intramedular fixation, compression plates or locking plates. Nowadays, fractures are mostly cured by open repositioning or internal fixing, which requires locking plates. The strong connection between the bolt and the plate results from a specially designed screw head and a... More hole in the plate. The polyaxiality of screws ensures greater biomechanical stability of the bone-plate-screw system, resulting in preservation of biological bone integrity, faster healing and consequently fewer postoperative complications. This paper examines the functionality of the new proposed locking system and the existing system which is already used in surgical practice. Computer simulation experiments under static and cyclic loads were also performed for four cases of changing the angles of the screw axis with respect to the axis of the screw hole in the plate. The results of the computer simulations carried out by applying the finite element method show that stresses in the case when the screw is under axial load are slightly higher than in the case of the control locking system. The results of bending tests show that stresses in the screw are greater in the control locking system and stresses in the plate are greater in the new locking system. The displacements are greater in the screw in both cases. The results of the cyclic tests carried out by bending the screws locked in the plate show that there are no statistically significant differences in the displacements between the new and the control locking system. The results of the static push-out test show that in the case when the screw is locked perpendicularly to the plate, the maximum force leading to the release of the strong connection between the screw head and the screw in the plate is statistically higher in the control locking system. Less
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:080105
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2021-07-04
Terms of useLicence In copyright icon
Created on2019-07-03 20:18:49
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