The aim of the study was to evaluate the accuracy of zygomatic implant placement using customized bone-supported laser-sintered titanium templates. Pre-surgical computed tomography (CT) scans allowed to develop the ideal virtual planning for each patient. Direct metal laser-sintering was used to create the surgical guides for the implant placement. Post-operative CT scans were taken 6 months after surgery to assess any differences between the planned and placed zygomatic implants. Qualitative and quantitative three-dimensional analyses were performed with the software Slicer3D, recording linear and angular displacements after the surface registration of the planned and placed models of each implant. A total of 59 zygomatic implants were analyzed. Apical displacement showed a mean movement of 0.57 & PLUSMN; 0.49 mm on the X-axis, 1.1 & PLUSMN; 0.6 mm on the Y-axis, and 1.15 & PLUSMN; 0.69 mm on the Z-axis for the anterior implant, with a linear displacement of 0.51 & PLUSMN; 0.51 mm on the X-axis, 1.48 & PLUSMN; 0.9 mm on the Y-axis, and 1.34 & PLUSMN; 0.9 mm on the Z-axis for the posterior implant. The basal displacement showed a mean movement of 0.33 & PLUSMN; 0.25 mm on the X-axis, 0.66 & PLUSMN; 0.47 mm on the Y-axis, and 0.58 & PLUSMN; 0.4 mm on the Z-axis for the anterior implant, with a linear displacement of 0.39 & PLUSMN; 0.43 mm on the X-axis, 0.42 & PLUSMN; 0.35 mm on the Y-axis, and 0.66 & PLUSMN; 0.4 mm on the Z-axis for the posterior implant. The angular displacements recorded significative differences between the anterior implants (yaw: 0.56 & PLUSMN; 0.46 & DEG;; pitch: 0.52 & PLUSMN; 0.45 & DEG;; roll: 0.57 & PLUSMN; 0.44 & DEG;) and posterior implants (yaw: 1.3 & PLUSMN; 0.8 & DEG;; pitch: 1.3 & PLUSMN; 0.78 & DEG;; roll: 1.28 & PLUSMN; 1.1 & DEG;) (p < 0.05). Fully guided surgery showed good accuracy for zygomatic implant placement and it should be considered in the decision-making process.
Accuracy of Zygomatic Implant Placement Using a Full Digital Planning and Custom-Made Bone-Supported Guide: A Retrospective Observational Cohort Study
Gallo, Francesco;Barone, Selene;Giudice, Amerigo
2023-01-01
Abstract
The aim of the study was to evaluate the accuracy of zygomatic implant placement using customized bone-supported laser-sintered titanium templates. Pre-surgical computed tomography (CT) scans allowed to develop the ideal virtual planning for each patient. Direct metal laser-sintering was used to create the surgical guides for the implant placement. Post-operative CT scans were taken 6 months after surgery to assess any differences between the planned and placed zygomatic implants. Qualitative and quantitative three-dimensional analyses were performed with the software Slicer3D, recording linear and angular displacements after the surface registration of the planned and placed models of each implant. A total of 59 zygomatic implants were analyzed. Apical displacement showed a mean movement of 0.57 & PLUSMN; 0.49 mm on the X-axis, 1.1 & PLUSMN; 0.6 mm on the Y-axis, and 1.15 & PLUSMN; 0.69 mm on the Z-axis for the anterior implant, with a linear displacement of 0.51 & PLUSMN; 0.51 mm on the X-axis, 1.48 & PLUSMN; 0.9 mm on the Y-axis, and 1.34 & PLUSMN; 0.9 mm on the Z-axis for the posterior implant. The basal displacement showed a mean movement of 0.33 & PLUSMN; 0.25 mm on the X-axis, 0.66 & PLUSMN; 0.47 mm on the Y-axis, and 0.58 & PLUSMN; 0.4 mm on the Z-axis for the anterior implant, with a linear displacement of 0.39 & PLUSMN; 0.43 mm on the X-axis, 0.42 & PLUSMN; 0.35 mm on the Y-axis, and 0.66 & PLUSMN; 0.4 mm on the Z-axis for the posterior implant. The angular displacements recorded significative differences between the anterior implants (yaw: 0.56 & PLUSMN; 0.46 & DEG;; pitch: 0.52 & PLUSMN; 0.45 & DEG;; roll: 0.57 & PLUSMN; 0.44 & DEG;) and posterior implants (yaw: 1.3 & PLUSMN; 0.8 & DEG;; pitch: 1.3 & PLUSMN; 0.78 & DEG;; roll: 1.28 & PLUSMN; 1.1 & DEG;) (p < 0.05). Fully guided surgery showed good accuracy for zygomatic implant placement and it should be considered in the decision-making process.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
