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Stomatologija 2013; 15 (4): 123-8 123 KB

Influence of restorative techniques on fracture load of endodontically treated premolars

Ana Amélia Bianchi e Silva, Paula Cristine Ghiggi, Eduardo Gonçalves Mota, Gilberto Antonio Borges, Luiz Henrique Burnett Júnior, Ana Maria Spohr

Summary

Objective. This study evaluated the influence of restorative techniques on the fracture load and fracture mode of endodontically treated premolars with MOD cavities. Materials and Methods: Sixty maxillary premolars were divided into groups: G1 – sound teeth; G2 – direct technique using Four Season; G3 – Adoro inlays; G4 – Adoro onlays; G5 – Empress inlays; G6 – Empress onlays. The specimens were submitted to compressive axial loading until failure. The fracture mode was analyzed.

Results. According to ANOVA and Tukey’s test (α=0.05), the sound teeth (1370.61 N) showed the highest fracture load mean, which did not differ statistically from IPS Empress onlays (1304.21 N). Intermediate values were obtained for IPS Empress inlays (918.76 N), Adoro onlays (861.15 N), Adoro inlays (792.71 N) which did not differ statistically among them. The lowest fracture load was obtained for direct restorations with Four Seasons (696.08 N), which did not differ statistically from the Adoro inlays.

Conclusions. The ceramic restorations provided higher fracture load and more incidences of catastrophic fractures. Cuspal coverage increased teeth fracture load. The results were similar for direct and indirect inlays with composite resin.

Key words: ceramics, composite resins, restorations, resistance.

Received: 06 06 2012

Accepted for publishing: 23 12 2013

¹Department of Restorative Dentistry, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Brazil

²University of Uberaba, Brazil

³Department of Dental Materials, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Brazil

Ana Amélia Bianchi e Silva¹ – D.D.S, MSc, PhD Student

Paula Cristine Ghiggi¹ – D.D.S, MSc, PhD Student

Eduardo Gonçalves Mota¹ – D.D.S., MSc, PhD, adj. prof.

Gilberto Antonio Borges² – D.D.S., MSc, PhD student

Luiz Henrique Burnett Júnior¹ – D.D.S., MSc, PhD, assist. prof.

Ana Maria Spohr³ – D.D.S., MSc, PhD, adj. prof.

Address correspondence to Ana Maria Spohr, Av. Ipiranga 6681 Block 6 – School of Dentistry, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil.

E-mail address: anaspohr@terra.com.br



	Baltic Dental and Maxillofacial Journal

December, 2013, Vol. 15, No. 4 CONTENTS SCIENTIFIC ARTICLES Expression of growth factors and growth factor receptors in human cleft-affected tissue Benita Krivicka, Mara Pilmane, Ilze Akota 115-118 Radiographic assessment of findings in the maxillary sinus using cone-beam computed tomography Ilze Dobele, Ligija Kise, Peteris Apse, Gints Kragis, Andris Bigestans 119-122 Influence of restorative techniques on fracture load of endodontically treated premolars Ana Amélia Bianchi e Silva, Paula Cristine Ghiggi, Eduardo Gonçalves Mota, Gilberto Antonio Borges, Luiz Henrique Burnett Júnior, Ana Maria Spohr 123-128 Apoptosis and MMP-2, TIMP-2 expression in cleft lip and palate Liene Smane, Mara Pilmane, Ilze Akota 129-134 Toothache among dental patients attending a Nigerian secondary healthcare setting Clement Chinedu Azodo, Oritseweyemi Ololo 135-140 © 2014 Stomatologija		Stomatologija 2013; 15 (4): 123-8 123 KB Influence of restorative techniques on fracture load of endodontically treated premolars Ana Amélia Bianchi e Silva, Paula Cristine Ghiggi, Eduardo Gonçalves Mota, Gilberto Antonio Borges, Luiz Henrique Burnett Júnior, Ana Maria Spohr Summary Objective. This study evaluated the influence of restorative techniques on the fracture load and fracture mode of endodontically treated premolars with MOD cavities. Materials and Methods: Sixty maxillary premolars were divided into groups: G1 – sound teeth; G2 – direct technique using Four Season; G3 – Adoro inlays; G4 – Adoro onlays; G5 – Empress inlays; G6 – Empress onlays. The specimens were submitted to compressive axial loading until failure. The fracture mode was analyzed. Results. According to ANOVA and Tukey’s test (α=0.05), the sound teeth (1370.61 N) showed the highest fracture load mean, which did not differ statistically from IPS Empress onlays (1304.21 N). Intermediate values were obtained for IPS Empress inlays (918.76 N), Adoro onlays (861.15 N), Adoro inlays (792.71 N) which did not differ statistically among them. The lowest fracture load was obtained for direct restorations with Four Seasons (696.08 N), which did not differ statistically from the Adoro inlays. Conclusions. The ceramic restorations provided higher fracture load and more incidences of catastrophic fractures. Cuspal coverage increased teeth fracture load. The results were similar for direct and indirect inlays with composite resin. Key words: ceramics, composite resins, restorations, resistance. Received: 06 06 2012 Accepted for publishing: 23 12 2013 ¹Department of Restorative Dentistry, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Brazil ²University of Uberaba, Brazil ³Department of Dental Materials, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Brazil Ana Amélia Bianchi e Silva¹ – D.D.S, MSc, PhD Student Paula Cristine Ghiggi¹ – D.D.S, MSc, PhD Student Eduardo Gonçalves Mota¹ – D.D.S., MSc, PhD, adj. prof. Gilberto Antonio Borges² – D.D.S., MSc, PhD student Luiz Henrique Burnett Júnior¹ – D.D.S., MSc, PhD, assist. prof. Ana Maria Spohr³ – D.D.S., MSc, PhD, adj. prof. Address correspondence to Ana Maria Spohr, Av. Ipiranga 6681 Block 6 – School of Dentistry, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil. E-mail address: anaspohr@terra.com.br