Accuracy of Zygomatic Implant Placement Using Completely Versus Partially Guided

Area of Science:

• Oral and Maxillofacial Surgery
• Dental Implantology
• Computer-Aided Surgery

Background:

• Zygomatic implant placement presents surgical challenges due to limited access and visibility.
• Computer-generated 3D surgical guides aim to improve accuracy in complex implant procedures.
• Atrophic maxillae often necessitate zygomatic implants for prosthetic rehabilitation.

Purpose of the Study:

• To compare the accuracy of completely versus partially limiting 3D surgical guides for zygomatic implant placement.
• To evaluate the impact of guide type on operative time and implant positioning accuracy.

Main Methods:

• A prospective randomized controlled study involving patients with atrophic maxillae requiring zygomatic implants.
• Participants were randomized to receive zygomatic implants using either completely limiting or partially limiting 3D computer-guided surgical templates.
• Accuracy was assessed by measuring linear (coronal and apical) and angular deviations; operative time was also recorded.

Main Results:

• No significant differences in linear or angular deviations were found between the two groups, except for greater apical deviation in the midsagittal plane with partially limiting guides.
• Partially limiting guides resulted in a significantly shorter mean operative time compared to completely limiting guides.
• No postoperative complications or dropouts were reported in either group.

Conclusions:

• Partially limiting surgical guides are a viable, less invasive option for zygomatic implant placement, offering reduced surgical time with comparable accuracy.
• Completely limiting guides provide enhanced control over the critical apical implant position.
• Further research with larger sample sizes is warranted to confirm these findings.