NCT07269951

The Bone Thickness of Infrazygomatic Crest Was Measured on CBCTs

Assessment of Bone Thickness in the Infrazygomatic Crest and Proper Insertion Angle for Miniscrew Positioning: A Retrospective CBCT Study

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 95 (actual)
• Sponsor: Cairo University · Academic / Other
• Sex: All
• Age: 16 Years – 35 Years
• Healthy volunteers: Not accepted

Summary

This study will be done on 95 patients with CBCTs retrospectively, to evaluate the bone depth of infrazygomatic crest region for selecting suitable size of miniscrews and proper insertion angle clinical guide in the infrazygomatic crest without injuring the mesiobuccal root of the maxillary first molar.

Detailed description

CBCTs of 95 patients were collected retrospectively from archives of Faculty of Dentistry, Cairo University, that were requested for different dental purposes. The thickness of the IZC was measured above mesio-buccal root of upper 6 (U6MB), above disto-buccal root of upper 6 (U6DB) and contact point between upper 6 and 7 roots (U6-7). The distance from point of entry of miniscrew to the occlusal plane, that saves roots from injury, was measured. Then, the angle of miniscrew insertion in relation to the occlusal plane was measured at maximum thickness available together with point of entry in relation to the occlusal plane. The IZC thickness of right and left sides of each patient was compared, also compared in males and females. Kruskal-Wallis test, Paired Wilcoxon signed rank test \& Spearman correlation were used to analyze results

Conditions

• Miniscrew Placement

Timeline

• Start date: 2025-09-24
• Primary completion: 2025-09-30
• Completion: 2025-09-30
• First posted: 2025-12-08
• Last updated: 2025-12-08

Locations

1 site across 1 country: Egypt