Comparison between the oblique and vertical interradicular placement of the mini-screw in the buccal alveolar bone between the maxillary second premolar and first molar using CAD technology

Abstract
Introduction: The purpose of the study was to compare the oblique with the vertical buccal interradicular placement of the mini-screw between the maxillary second premolar and first molar in terms of the safety of placement and the potential maximum distalization of the maxillary dentition.
Materials and methods: Using 22-patient maxillary cone beam computed tomography (CBCT) scans and computer-aided design (CAD) technology, a virtual screw was inserted into the buccal process at the angle of 30 degrees (30ᵒ group) or 90 degrees (90ᵒ group) to the long axis of the upper second premolar. The space between the virtual screw and adjacent roots, the length of the virtual screw in the bone and the maximum distalization of the maxillary dentition were measured.
Results: The means of space were around 1.52 mm in the 30ᵒ group and 1.16 mm in the 90ᵒgroup with significant difference (P< 0.001). The means of the maximum distalization were 2.85 mm in the 30ᵒ group and 1.24 mm in the 90ᵒ group with significant difference (P< 0.001). The means of the virtual screw length in the bone were 5.60 mm and 5.77mm in 30ᵒ and 90ᵒ groups respectively without significant difference (P>0.05).
Conclusions: The oblique (30°) placement of mini-screw was much safer and had more potential for distalization of the maxillary dentition compared with the vertical (90°) placement.

Keywords
comparison, oblique, vertical, buccal interradicular, mini-screw placement, CAD

Cite this paper
Wenyong Liang, Qian Cheng, Shuran Liang, Comparison between the oblique and vertical interradicular placement of the mini-screw in the buccal alveolar bone between the maxillary second premolar and first molar using CAD technology , SCIREA Journal of Clinical Medicine. Volume 9, Issue 4, August 2024 | PP. 116-129. 10.54647/cm321289

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