Retencija djelomičnih proteza

master's thesis

• Title (english): Retention of partial dentures
• Author: Eugen Čulo
• Mentor: Vlado Carek (mentor)
• Granter: University of Zagreb; School of Dental Medicine; Zagreb
• Defense date and country: 2004, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Dental Medicine

Abstract

U ovom radu opisane su vrijednosti retencijskih sila teleskop krunica i lijevanih kvačica uzimajući u obzir sve faktore koji utječu na njih. Iz tog razloga nastojalo se što detaljnije opisati kako sastavne dijelove djelomične proteze i njeno planiranje, tako i fizikalna i kemijska svojstva materijala od kojih je načinjena. Djelomična proteza uz zvačnu, estetsku i fonetsku funkciju treba djelovati profilaktički na potporna tkiva i preostale zube. Osnovna je zadaća takvog terapijskog djelovanja što dugotrajnije očuvati zdravlje svih bioloških struktura. Retencijski elementi kod takvih proteza moraju pružati otpor svim funkcijskim i parafunkcijskim silama u žvačnom sistemu. Stanje stomatognatog sustava ne može nakon dužeg vremena biti isto kao u trenutku namještanja djelomične proteze. Ono se kontinuirano mijenja iz biološki opravdanih razloga, ali se retencijsko sredstvo mora prilagoditi tim promjenama, a ne da ih ubrzava. Kvačice koje nisu mjerene paralelometrom i pri čijoj izradi nisu poštivane adekvatne laboratorijske faze, te kvačice koje su brušene pri stavljanju u usta, imaju smanjenu elastičnost i veću lomljivost. Legure kobalta i kroma imaju široku primjenu u stomatološkoj protetici za izradbu djelomičnih proteza. Treba se pridržavati propisanih temperatura topljenja i lijevanja, jer se time ne mijenjaju fizikalna i mehanička svojstva. Posebnu pozornost treba obratiti na završnu obradu jer ona također utječe na retencijsku silu kvačice. Vremenom dolazi i do zamora materijala uslijed čega slabi retencija i stabilizacija proteze, te se povećava njena pomičnost. Iz tog razloga treba planirati i izraditi biološki što ispravnija i tehnološki savršenija retencijska sredstva, koristeći osnovne principe biomehanike i statike.

Abstract (english)

The aim of this work was to describe the value of the retention forces of cast attachments taking into consideration all the factors that have influence on them. For this reason we have tried to describe in details all the parts of the partial prosthesis such as planning of the partial prosthesis as well as the physical and chemical properties of the materials used for its construction. The partial prosthesis has to function prophylacticly on the supporting tissue and the remaining teeth in addition to its masticatory, esthetic and phonetic function. The basic task of such therapy is to protect for a longer period of time the health all biological sttructures. The retention elements in such dentures must give resistance to all functional
and parafunction forces of the masticatory system. The state of the stomatognathis system cannot remain the same as in the beginning (inserting) the partial denture in the mouth. This state is continually changing from justifiable biological reason, but the retentional device has to adapt to this changes. The attachments that are not measured by parallelometer and for which making, the adequate laboratory procedures were not respected, as well as the attachments that were grinded at the time of their inserting in the mouth, have a lower flexibility and higher fragility. The cobalt and cohrom alloys have a large application in the prosthetic dentistry for the construction of the partial dentures. It is recommended to stick to the prescribed melting temperatures and casting temperatures, because in such a way, the physical and mechanical properties are not changed. Special attention should be given to the final process, because it has influence of the retention force of the attachment. With the passing of time there is a fatigue of the material, which results in the weakening of the retention and stability of the denture, and in the increase of its mobility

• Keywords: djelomične proteze; retencija
• Keywords (english): Partial Denture; Retention
• Language: croatian
• URN:NBN: urn:nbn:hr:127:377464
• Study programme: Title: Integrated undergraduate and graduate university study of Dental Medicine; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: doktor dentalne medicine (doktor dentalne medicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2024-08-29 11:59:08