Banca de QUALIFICAÇÃO: ANA LARISSE CARNEIRO PEREIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ANA LARISSE CARNEIRO PEREIRA
DATE: 19/08/2020
TIME: 09:00
LOCAL: plataforma remota google meet
TITLE:

 

VERACITY OF A NEW  INTRAORAL SCANNING TECHNIQUE:  EFFECT OF DISTANCE AND ANGLE BETWEEN IMPLANTS IN ENDENTULOUS MANDIBULAR ARCHES 

KEY WORDS:

Protheses supported-implant; Three-dimensional; CAD/CAM; Edentulous; Jaw.

PAGES: 84
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUBÁREA: Clínica Odontológica
SUMMARY:

This controlled, non-randomized, cross-sectional study aims to present new intraoral scanning technique to increase veracity of scanning in capturing angle and distance of implants in edentulous mandibular arches. The participants rehabilitated with fixed implant-supported total mandibular temporary prosthesis retained by four implants were submitted three impression methods. SC group (intraoral scanning with digital scanbodies), SD group (intraoral scanning with device) and CT group (transfer of implant position transfer). A laboratory scanner was used digitize master models of CT group. The STL data set was overlaid. From this, coordinate system was defined for three-dimensional projection of each implant. Variations in these coordinates for linear (∆x, ∆ye ∆z), angular (XY, XZ and YZ) displacements and their variations (∆θXY, ∆θXZ and ∆θYZ) were compared statistically (p<0.05) (n=60/implant). Then, inter-cylindrical distances (n=40/distances) were measured. In search for correlations between distances and axes of coordinates, Spearman's correlation coefficient (p <0.05) was used. As for linear displacements, the SD group presented veracity values better than the SC for ∆y (ႿSC: 2.82; ႿSD: 0.63; p=0.017) and ∆z (ႿSC: 2.06; ႿSD: 0,70; p=0.014) when compared with the CT group. As for ∆x (ႿSC: -0.17; ႿSD: -0.21; p=0.485) statistically no differences were found. The SD group showed less angular variation in the three projection planes (∆θXY, ∆θYZ and ∆θXZ) and was the closest to the CT group, the opposite did not happen with the SC group.The SD group presented mean values closer CT far distances between implants (SC: 20.15; SD: 21.46; CT: 21.52; p = 0.011). No significant correlation was observed between distances and axes of coordinates. The new intraoral scanning technique (SD group) showed results of linear, angular displacements and distance between implants superior SC group and closer CT group.

 

BANKING MEMBERS:
Interna - 1459400 - ADRIANA DA FONTE PORTO CARREIRO
Interno - 2042290 - BONIEK CASTILLO DUTRA BORGES
Interno - 1466265 - GUSTAVO AUGUSTO SEABRA BARBOSA