Effect of ceramic material type on the fracture load of inlay-retained and full-coverage fixed dental prostheses

Figures & data

Table 1. Materials used in this study (data obtained from the manufacturers).

Brand	Material	Chemical composition	Batch number	Manufacturer
Vita Suprinity	Zirconia-reinforced lithium silicate ceramic	Zirconium-oxide: 8–12% Silicon dioxide: 56–64% Lithium oxide: 15–21% Lanthanum oxide: 0.1%	0000048421	VITA Zahnfabrik, Bad Säckingen, Germany
Ceramill Zolid FX Multilayer	Super-high translucent zirconia	Zirconium-oxide + yttrium oxide + hafnium-oxide: ≥99%. Yttriumoxide: 8.5–9. 5%. Hafnium-oxide ≤.05%. Aluminium-oxide ≤.05%. Other oxides ≤1%	1811001	Ammann Girrbach AG, Koblach, Austria
Panavia F2.0	Primers	Primer A: HEMA, MDP, 5-NMSA, water, accelerator. Primer B: 5-NMSA, accelerator, water, sodium benzene sulfinate	000064	Kurary Co. Ltd, Osaka, Japan
	Resin composite cement	Paste A: MDP, DMA, silanated silica filler, dl-camphorquinone. Paste B: DMA, silanated barium glass filler, sodium fluoride
Clearfil Ceramic Primer	Ceramic primer	3-MPS, MDP, ethanol	380,024	Kuraray Noritake Dental Inc., Tokoyo, Japan
Initial Zr-FS Feldspar	Silica based ceramic		1707191	GC Europe, Leuven, Belgium

HEMA: 2-hydroxyethyl methacrylate; MDP: 10-methacryoloyloxydecyl dihydrogen phosphate; 5-NMSA: N-methacryloxyl-5-aminosalicylic acid, DMA: dimethacrylates, 3-MPS: 3-methacryloxypropyl trimethoxysilane.

Figure 1. Preparation of the inlay cavities on premolar and molar.

Figure 2. Test specimen for inlay retained fixed partial denture.

Table 2. Failure load (N) for four test groups (n = 8 per group).

Groups	Mean	SD	Min	Max
Zr-FPD	672^a	183	453.04	931.35
Zr-IRFPD	672^a	123	480.61	811.25
ZrC-IRFPD	638^a	59	638.63	734.16
VS-IRFPD	391^b	136	204.02	587.20

Identical superscript letters indicate no significant difference (p ≥ .05). Zr-FPD, complete coverage zirconia fixed partial dentures; Zr-IRFPD, zirconia inlay retained fixed partial denture (air-abraded); ZrC-IRFPD, inlay retained bridge from zircona internally coated by a feldspathic porcelain layer; VS-IRFPD, zirconia reinforced lithium silicate inlay retained fixed partial denture.

Figure 3. Ceramill Zolid FX Multilayer IRFPD where failure occurred in connector.

Figure 4. Ceramill Zolid FX Multilayer IRFPD where failure occurred in pontic.

Figure 5. Vita Suprinity IRFPD where failure occurred in pontic.