Rodrigues et al. 2017 |
G1: OPC (n = 20) |
cp-Ti |
EH; mini abutment; Neodent, Brasil |
G1: Laser (390 V/9 ms); |
2 points evaluated (B and L); Optical microscope x-ray microtomography. |
G1: 203.09 ± 51.11 |
G2: 42.58 ± 23.58 |
The TIG technique and Laser welding were effective in the marginal and internal reduction of the misfits. |
Positive |
G2: LW (n = 10) |
G2: TIG (36A/60 ms); |
|
G3: 52.40 ± 26.46 |
G3: TIG (n = 10) |
|
|
|
Spazzin et al. 2016 |
G1: OPC (n = 10) |
cp-Ti |
Multi-unit aburment; Neodent, Brasil |
G3: Laser Welding |
8 points evalluated; Optical microscope |
G1: 111 ± 42.6 |
G2: 27.4 ± 3.3 |
LW and FCPA are recommended to improve the fit of implant-supported fixed prostheses. |
Positive |
G2:FCPA (n = 10) |
|
G3: 61.1 ± 31.4 |
G3: LW (n = 10) |
|
|
Neves et al. 2014 |
G1: PUN (n = 3) |
Ni-Cr |
EH; analog; Conexão; Neodent; Biomet 3i |
Ni-Cr-Co-Mo-, brazing (1200°C-1315°C) |
6 pictures on mesial e distal of each abutment; stereomicroscope |
% DMV (≤10µm) |
%DMV (≤10µm) |
The welding procedure didn’t influence an increase marginal misfit in all groups. |
None/Positive |
G2: PUC (n = 3) |
G1:33.3% |
G1:16.6% |
G3: PU3i (n = 3) |
G2: 33.3% |
G2:38.85% |
G4: PUTN (n = 3) |
G3:33.3% |
G3:27.75% |
|
G4:83.25% |
G4:50% |
Tiossi et al. 2012 |
G1: OPC (n = 6) |
Ni-Cr |
Internal Connection; Neodent, Brazil |
G2;G3: Laser (300V/9ms) |
3 points on B, L, P faces; Optical microscope |
Left side screw |
Left side screw |
It increased the accuracy of the adaptation and passivity structures, thus helping to create a successful prosthetic rehabilitation. |
Positive |
G2: LW DA (n = 6 |
G1: 16.5 ± 7.55 |
G2: 16.27 ± 1.71 |
G3: LW DS (n = 6) |
Right side screw |
G3: 6.43 ± 3.24 |
|
G1: 58.66 ± 14.30 |
Right side screw |
|
|
G2: 39.48 ± 12.03 |
|
|
G3: 23.13 ± 8.24 |
Bianchini et al. 2011 |
G1: OPC (n = 6) |
Ag-Pd |
EH, Conexão, Brazil |
G2: Convencional Welding |
Optical microscope |
G1: 28.67 ± 12.92 |
G2: 5.50 ± 1.50 |
The results confirm the findings of previous studies that the soldering of the implant-supported prosthesis optimizes the prosthetic adjustment. |
Positive |
G2: Conventional Soldering (n = 6) |
G3: Laser Welding |
|
G3:6.17 ± 2.14 |
G3: LW (n = 6) |
|
|
|
Tiossi et al. 2010 |
G1: OPC NiCr (n = 6) |
Ni-CR |
Internal Connection; Neodent, Brazil |
Laser |
3 points on B, L, P face; Optical microscope |
G1:11.19 ± 2.54 |
G3:12.88 ± 2.93 |
The results showed that the welding of the cp Ti structures is able to lower the levels of misfit and also to improve the passivity levels for the same frameworks when compared to one-piece cast frameworks. |
Positive |
G2: OPC cp-Ti (n = 6) |
cp-Ti |
G2: 27.57 ± 5.06 |
G4:13.77 ± 1.51 |
G3: LW NiCr (n = 6) |
|
|
|
G4: LW cp-Ti (n = 6) |
|
|
|
Aguiar Júnior et al. 2009 |
G1: OPC (n = 3) |
Ni-Cr |
Internal Connection; Neodent, Brazil |
Laser (300V/9ms) |
3 points on B, L, P faces; Optical microscope |
G1:11.18 ± 2.54 |
G2:19.19 ± 11.83 |
The results of this study suggest that the frameworks that were submitted to welding reduce the levels of prosthetic misfit in implant-supported frameworks and also significantly improve the passivity when compared with one-pieces casts frameworks |
Positive |
G2: LW D( n = 3) |
|
G3:10.08 ± 3.73 |
G3: LW T (n = 3) |
|
|
|
|
|
Tiossi et al. 2008 |
G1: OPC (n = 6) |
Co-Cr |
Internal Connection, Conexão, Brazil |
Laser Welding |
3 points on B, L, P face; Optical microscope |
G1: |
G2: |
Welding of the specimens, followed by laser welding, is a suitable procedure to achieve lower misfit values and promote better passivity. |
Positive |
G2: Laser Welding (n = 6) |
Ni-Cr |
Cr-Co: 54.23 ± 37.10 |
Cr-Co:21.49 ± 9.08 |
|
cpTi |
Ni-Cr:25.00 ± 7.92 |
Ni-Cr:13.10 ± 1.81 |
|
|
cpTi:48.41 ± 26.69 |
cpTi:17.70 ± 11.70 |
Barbosa et al. 2007 |
G1: Lab1(n = 2) |
Ni-Cr |
EH; Conexão Sistemas de Prótese, Brazil |
Conventional Welding |
2 pictures on mesial and distal face; SEM |
% DMV (≤10µm) |
% DMV (≤10µm) |
The weld increased the degree of misfit of the structure, regardless of the laboratory that did it. |
Negative |
G2: Lab 2 (n = 2) |
G1:95% |
G1:70.8% |
G3: Lab 3 (n = 2) |
G2:70.8% |
G2:70.8% |
|
G3:87.5% |
G3:79.1% |
Castillo et al. 2006 |
G1-S (n = 10) |
cp-Ti |
EH; Conexão Sistemas de Prótese, Brazil |
Laser (300V/10ms) |
12 points; Digital microscope |
G1S |
C1:25.08+6.30 |
G1S |
C1:15.83+4.57 |
The marginal fitting values for slotted screws were not different with or without laser welding, but significant differences were found for hexagonal screws in the same conditions. |
None/Positive |
G1-H (n = 10) |
Co-Cr |
C2:25.99 ± 8.01 |
C2:19.49 ± 4.30 |
G2-S (n = 10) |
|
C3:24.83 ± 3.73 |
C3:15.75 ± 3.60 |
G2-H (n = 10) |
|
G1H |
C1:24.99+4.27 |
G1H |
C1:19.08+6.86 |
|
|
C2:22.80 ± 2.70 |
C2:18.99 ± 4.86 |
|
|
C3:25.33 ± 6.90 |
C3:16.33 ± 2.86 |
|
|
G2S |
C1:22.91+3.97 |
G2S |
C1:23.91+4.52 |
|
|
C2:25.33 ± 3.02 |
C2:21.41 ± 4.60 |
|
|
C3:24.16 ± 2.58 |
C3:22.83 ± 3.10 |
|
|
G2H |
C1:29.83+7.66 |
G2H |
C1:24.83+6.07 |
|
|
C2:26.74 ± 3.54 |
C2:21.07 ± 5.39 |
|
|
C3:27.24 ± 4.96 |
C3:19.33 ± 3.12 |
Koke et al. 2004 |
G1: Ti |
Cr-Co and cp-Ti |
Friadent GmbH, Germany |
Laser |
8 points; Light microscope |
G1: 40 ± 11 |
G1 e G2: 17 ± 6 |
The manufacture of the one-piece casts and then the welding provides a better marginal fit. |
Positive |
G2: Cr-Co |
G2:72 ± 40 |