Evaluation of Zygomatic Implant Placement Accuracy Using Fully Metallic vs Resin-based Static Surgical Guides in Severely Atrophic Maxilla

Summary

Some patients lose a large amount of bone in the upper jaw. When this happens, it can be difficult to place regular dental implants. In these cases, special implants called zygomatic implants can be used. These implants are longer than normal implants and are fixed in the cheekbone, which usually has enough bone to support them. They can help support fixed teeth for patients with severe bone loss in the upper jaw.

Placing zygomatic implants requires careful planning and high accuracy. To help guide the surgeon during the operation, a surgical guide can be used. A surgical guide is a custom-made device that helps the surgeon place the implant in the planned position.

Surgical guides can be made from different materials. The most common type is made from resin (a strong plastic material) using 3D printing. Recently, fully metallic surgical guides have been developed. These metal guides may be stronger and more stable during surgery, but it is not yet clear if they improve the accuracy of implant placement.

The purpose of this study is to compare the accuracy of metal surgical guides and resin surgical guides when placing zygomatic implants in patients with severe bone loss in the upper jaw.

Patients included in the study will undergo a clinical examination and a CT scan before surgery to plan the implant positions. During the surgery, each patient will receive zygomatic implants on both sides of the upper jaw. On one side, the implants will be placed using a metal surgical guide, and on the other side, they will be placed using a resin surgical guide. This allows the two types of guides to be compared in the same patient.

After the surgery, another CT scan will be taken to check the final position of the implants. The planned implant position will be compared with the actual position after surgery to measure the accuracy of placement.

The results of this study will help determine whether metallic surgical guides or resin surgical guides provide better accuracy when placing zygomatic implants.

Participation in this study is voluntary. All patients will receive full information about the study and will sign a consent form before participating.

Conditions

• Atrophic Edentulous Maxilla
• Zygomatic Implants
• Guided Surgery
• Dental Implant
• Accuracy of Dental Implant Placement

Interventions

DEVICE

Resin surgical Guide

Before surgery, a CT scan and a digital impression of the mouth will be taken. A resin surgical guide (made with biocompatible 3D-printed material) will be created to guide the implant placement. On the assigned side, the zygomatic implant will be placed using this resin guide.

DEVICE

Group B (Metallic nickel Guide)

CT scan and digital planning will be used. A metallic surgical guide (made of nickel using CAD/CAM technology) will be created. , the zygomatic implant will be placed using this metallic guide on one side.

Sponsors & Collaborators

• Future University in Egypt

  lead OTHER

Principal Investigators

• ramy ragab el beialy, proffessor · cairo university in egypt

• mohamed safwat eid, bachelor · future unversity in egypt

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

CROSSOVER

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2025-11-03

Primary Completion

2026-06-30

Completion

2026-06-30

Countries

• Egypt

Study Locations