Table 3 Descriptive statistics of internal and marginal discrepancies (μm) among studied groups

Internal discrepancy

Bias

Std. Error

95% Confidence Interval

Lower

Upper

Vita Enamic

N

10

Mean

83.1500

-.0371

1.6620

80.1282

86.7000

Std. Deviation

5.75447

-.58330

1.63998

2.21020

8.03690

Nacera

N

10

Mean

69.2750

.0059

1.0570

67.2013

71.3750

Std. Deviation

3.55209

-.23894

.60208

2.04549

4.33842

Zirconia

N

10

Mean

100.3000

.0758

1.1965

98.1256

102.8744

Std. Deviation

3.97876

-.22735

.62354

2.36117

4.89645

PEKK

N

10

Mean

80.5625

-.0058

1.0826

78.3125

82.5625

Std. Deviation

3.63779

-.20774

.62834

1.98191

4.55598

Marginal discrepancy

Mean

Std. Deviation

Std. Error

95% Confidence Interval for Mean

N

Lower Bound

Upper Bound

Vita Enamic

10

86.5500

14.09777

4.45811

76.4651

96.6349

Nacera

10

82.3750

5.84671

1.84889

78.1925

86.5575

Zirconia

10

102.6500

4.00729

1.26721

99.7834

105.5166

PEKK

10

78.4750

5.15651

1.63063

74.7863

82.1637