Comparison of the effects of different loading locations on stresses transferred to straight and angled implant-supported zirconia frameworks: a finite element method study

Figures & data

Figure 1. Mandible, implant-supported crown and titanium structure (abutment + implant body) model.

Table 1. Poisson ratio and Young's moduli values of materials used in the study.

Material	Poisson ratio	Young's moduli (GPa)	Reference
Cortical bone	0.30	13.7	[18]
Spongious bone	0.30	1.10	[18]
Titanium structure (implant body + abutment)	0.34	114.00	[18]
Zirconia	0.33	210.00	[12]
Porcelain	0.35	82.80	[19]
Cement	0.35	12.00	[20]

Figure 2. Examples of vertical and oblique loading forces of 300 N.

Figure 3. Stress analysis of the straight implant-supported crown.

Table 2. Maximum and minimum stress values after force application (MPa).

Type of implant-supported		Vertical loading (MPa)		Oblique loading (MPa)
prosthesis model	Material	(Max.)	(Min.)	(Max.)	(Min.)
Straight	Titanium structure (abutment + implant body)	62.51	1.70	244.52	0.64
	Zirconia framework	64.02	3.93	229.74	1.21
Angled	Titanium structure (abutment + implant body)	74.62	1.47	336.6	0.93
	Zirconia framework	94.34	6.33	731.46	3.53

Figure 4. Stress analysis of the angled implant-supported crown.

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