2020
DOI: 10.2341/18-231-l
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Endodontic Access Effect on Full Contour Zirconia and Lithium Disilicate Failure Resistance

Abstract: SUMMARY Objectives: To evaluate the effect of endodontic access on the failure load resistance of both adhesively and conventionally luted, full-contour monolithic yttria-stabilized zirconium dioxide (Y-TZP) and adhesively luted lithium disilicate (LD) crowns cemented on prepared teeth. Methods and Materials: Seventy-two human maxillary molars were prepared per respective guidelines for all-c… Show more

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Cited by 7 publications
(21 citation statements)
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“…The results of the present study differed from those of another study, which concluded that accessing through 3Y zirconia crowns cemented with glass ionomer cement with a coarse diamond rotary instrument reduced its fracture load 7 . That study differed from the present study in that the crowns were cemented to natural teeth, the access opening was prepared in an anatomical shape with a cylindrical bur, and the access opening was placed between a mesial‐buccal cusp and triangular ridge that may have placed a wedging force when loaded.…”
Section: Discussioncontrasting
confidence: 99%
See 1 more Smart Citation
“…The results of the present study differed from those of another study, which concluded that accessing through 3Y zirconia crowns cemented with glass ionomer cement with a coarse diamond rotary instrument reduced its fracture load 7 . That study differed from the present study in that the crowns were cemented to natural teeth, the access opening was prepared in an anatomical shape with a cylindrical bur, and the access opening was placed between a mesial‐buccal cusp and triangular ridge that may have placed a wedging force when loaded.…”
Section: Discussioncontrasting
confidence: 99%
“…The other study reported that 3Y zirconia crowns bonded with resin cement demonstrated a lower fracture load following endodontic access 8 . Regarding bonded lithium disilicate crowns, some studies have reported no difference, 7,9–11 whereas other report a lower fracture load 12,13 following endodontic access with a coarse diamond rotary instrument. According to a recent Practice Based Research Network (PBRN) study, most US dentists cement zirconia crowns with glass ionomer‐based cements and bond lithium disilicate with resin cement 14 .…”
Section: Introductionmentioning
confidence: 99%
“…Similar to this study, Wood et al 14 found that after access hole preparation, fracture load of the zirconia crowns reduced significantly. Mallya et al 17 also found that endodontic access hole preparation significantly reduced the fracture load of zirconia crowns luted on extracted maxillary molar teeth. Grobecker‐Karl et al 18 found that access preparation would lead to microcracks in the zirconia.…”
Section: Discussionmentioning
confidence: 95%
“…Similar to this study, Wood et al 14 created a standard access hole by marking the preparation area on the occlusal surface through a plastic template. In contrast, Mallya et al 17 created endo access on natural teeth, which may represent the clinical condition more closely, however, this study design has the potential to create various sizes of access holes on each tooth which may affect the fracture load of the specimens as a confounding variable.…”
Section: Discussionmentioning
confidence: 99%
“…Their biological inertness and electrical passivation have made ceramics a promising material in the medical equipment and medicine. In comparison with metallic implants, zirconia-based ceramics show minimum ion release and are biologically inert [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Modern Ti implant technologies are being introduced due to possible combination of immunologic and aesthetic aspects of Ti and Ti alloys.…”
Section: Introductionmentioning
confidence: 99%