Table 1 Details of the various groups and subgroups along with their descriptions.

From: Effect of electrical grade glass fibres and silver nanoparticles on the mechanical properties of provisional PMMA material

Group No

Group description

Subgroup number

Subgroup description

Group 1 (G1)

Surface Roughness

Subgroup 1A (SG1A)

PMMA

Subgroup 1B (SG1B)

PMMA + AgNps

Subgroup 1C (SG1C)

PMMA + E-Glass Fibre

Subgroup 1D (SG1D)

PMMA + AgNps + E-Glass

Group 2 G2

Micro-Hardness

Subgroup 2A (SG2A)

PMMA

Subgroup 2B (SG2B)

PMMA + AgNps

Subgroup 2C (SG2C)

PMMA + E-Glass Fibre

Subgroup 2D (SG2D)

PMMA + AgNps + E-Glass

Group 3 G3

Flexural Strength

Subgroup 3A (SG3A)

PMMA

Subgroup 3B (SG3B)

PMMA + AgNps

Subgroup 3C (SG3C)

PMMA + E-Glass Fibre

Subgroup 3D (SG3D)

PMMA + AgNps + E-Glass

Group 4 G4

Particle Distribution

Subgroup 4A (SG4A)

PMMA

Subgroup 4B (SG4B)

PMMA + AgNps

Subgroup 4C (SG4C)

PMMA + E-Glass Fibre

Subgroup 4D (SG4D)

PMMA + AgNps + E-Glass