Naslov
Upotreba metode objektnog rastera za testiranje upotrebe kratkih mini implantata za retenciju donje pokrovne proteze
(Digital image correlation analysis of mandibular overdenture retained by four short mini dental implants)

Autori
Kovačić, Ines ; Peršić Kiršić, Sanja ; Kranjčić, Josip ; Čelebić, Asja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
6. Međunarodni kongres Stomatološkog fakulteta Sveučilišta u Zagrebu. U: Acta stomatologica Croatica vol.54 br.2 / Klarić Sever, Eva - Zagreb : Stomatolški fakultet Sveučilišta u Zagrebu, Hrvatsko Stomatološko društvo - Hrvatskog liječničkog zbora, 2020, 217-218

Skup
6. međunarodni kongres Stomatološkog fakulteta Sveučilišta u Zagrebu = 6th International Congress of the School of Dental Medicine University of Zagreb

Mjesto i datum
Zagreb, Hrvatska, 28.02.2020. - 29.02.2020

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
extremely atrophied mandible ; mandibular overdenture ; short one-piece mini-implants ; digital image correlation

Sažetak
Introduction: Insertion of short mini dental implants (short MDIs) could be the new treatment modality for cases of extreme mandibular ridge resorption. Aim was to test the behavior of dental implants being both, slim and short (short MDIs) for complete over-denture (OD) retention by digital image correlation (DIC).Materials and methods: Based on CBCT scans of patients with extremely atrophied man-dible (interforaminal height < 10 mm), six identical models of an average extremely re-sorbed mandible were virtually built and 3D printed. In each model, four MDIs (6, 8 or 10 mm long ; 2 or 2.5 mm wide) were inserted interforaminally and CoCr reinforced over-dentures (OD) were loaded using a testing machine with 150N loads applied on the den-ture molar region bilaterally, unilaterally and the on anterior region. The precise measure-ment of von Mises Strain and vertical displacement was conducted using the DIC method. Results: Von Mises Strain showed very low values on all models ranging from 0.46 % to 1.23 %, with the highest values observed at the zone of bone-denture contact and at sites closer to the force application. The DIC showed, in all loading stages, identical spreading direction with the maximum strain value within the bone-denture contact line. The same mean value of vertical displacement was measured for all three types of loading, amount-ing to 0.2 mm on all the models. It followed that the vertical displacement was the result of denture subsidence due to “o-ring” elasticity.Conclusion: DIC has demonstrated a low level of uniformly distributed strain that allows the use of short MDIs for the retention and stabilization of mandibular OD.

Izvorni jezik
Hrvatski, engleski

Znanstvena područja
Dentalna medicina

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