Pregled bibliografske jedinice broj: 315335
Stress distributin in different type of post and core
Stress distributin in different type of post and core // Abstracts of the 31th Annual Conference of the European Prosthodontic Association "From metal to glass and polymers"
Atena, Grčka, 2007. str. 122-122 (poster, međunarodna recenzija, sažetak, ostalo)
CROSBI ID: 315335 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Stress distributin in different type of post and core
Autori
Borčić, Josipa ; Antonić, Robert ; Glažar, Irena ; Muhvić Urek, Miranda ; Ćatić, Amir ; Petričević, Nikola
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo
Izvornik
Abstracts of the 31th Annual Conference of the European Prosthodontic Association "From metal to glass and polymers"
/ - , 2007, 122-122
Skup
Annual Conference of the European Prosthodontic Association "From metal to glass and polymers"
Mjesto i datum
Atena, Grčka, 11.10.2007. - 13.10.2007
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
nadogradnja; naprezanje; metoda konačnih elemenata
(post and core; stress; finite element method)
Sažetak
Post and core applications are generally used in the restoration of endodontically treated teeth. The stress distribution during masticatory function in a tooth restored with post and core can cause root fracture. The different mechanical behaviour of post and dentine is a critical parameter for the load transmission. In order to minimise the rigidity difference between the dentine and the post, a new kind of prefabricated posts were developed. The aim of the study was to analyse the mechanical behaviour of a new polymeric composite post reinforced with glass fibres vs cast post and core through 3D finite element analysis. A natural tooth was considered as a reference model. Models have more than 1, 5 million elements and an average loading force of 200 N was used to simulate biting forces in the two different occlusal conditions. First condition represents so called normal occlusion with tripodal occlusal contact. Second condition represents malocclusion with single contact on the palatal cusp. The load vectors were applied in the direction normal to the surface in order to simulate the contact with antagonistic teeth. Endodontic posts take some of the stresses on themselves and values are smaller on the surface of the tooth. In the case of normal occlusion stress distribution is the same for sound and restored tooth, dissimilarity exsists in the values od stresses. Significantly higher tensile stress values were recorded for the cast post and core restored tooth. At the root furcation, tensile stress appeared only in the restored tooth. In the case of normal occlusion, tensile stress at root furcation occurs only in the model with cast post and core. Cast posts resulted in significantly higher stress values. Tensile stresses are much harmful for the tooth tissue and this type of stress occurs at the root furcation only in the restored tooth, esspecially in the cast post and core.
Izvorni jezik
Engleski
Znanstvena područja
Dentalna medicina
POVEZANOST RADA
Projekti:
062-0650444-0442 - Biološki učinci stomatoloških materijala (Pezelj-Ribarić, Sonja, MZOS ) ( CroRIS)
062-0650446-0499 - Stres, okluzijska trauma i oralno-kirurška patologija (Borčić, Josipa, MZOS ) ( CroRIS)
Ustanove:
Medicinski fakultet, Rijeka
Profili:
Miranda Muhvić-Urek
(autor)
Nikola Petričević
(autor)
Robert Antonić
(autor)
Amir Ćatić
(autor)
Irena Glažar
(autor)
Josipa Borčić
(autor)