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. 2020 Feb 4;13(3):699. doi: 10.3390/ma13030699

Table 1.

Characteristics of experimental implant-abutment systems.

Group Ext Int-H2 Int-H1 Int-O2 Int-O1
Implant system US II GS II SS II
Implant/abutment interface External
butt joint		 11° taper
internal hexagon		 8° morse taper
internal octagon
Abutment type Cemented
(two-piece)		 Transfer
(two-piece)		 Rigid
(one-piece)		 Comocta
(two-piece)		 Solid
(one-piece)
Abutment material Ti CP-Gr 3 Ti CP-Gr 3 Ti-6Al-4V Ti CP-Gr 3 Ti-6Al-4V
Abutment diameter Ø5.0 Ø5.0 Ø5.0 Ø4.3 Ø3.5
Abutment gingival height 2 mm 2 mm 2 mm - -
Abutment height (HA) 5.5 mm 5.5 mm 5.5 mm 4 mm 4 mm
Abutment screw Ta WC/C Ta - Ta -
Fixture material Ti CP-Gr 4 Ti CP-Gr 4 Ti CP-Gr 4
Fixture diameter Ø4.0 Ø4.0 Ø4.0 Ø4.1 Ø4.1
Fixture height(HF) 11.4 mm 11.5 mm 11.5 mm 11.5 mm 11.5 mm
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Ext: external hexagon fixture + Cemented abutment; Int-H2: internal hexagon fixture + two-piece abutment; Int-H1: internal hexagon fixture + one-piece abutment; Int-O2: internal octagon fixture + two-piece abutment; Int-O1: internal octagon fixture + one-piece abutment; Ta: titanium alloy; WC/C Ta: tungsten carbide/carbon-coated titanium alloy; HA: Abutment height; HF: fixture height.