Abstract
Introduction: Buccal shelf area (BSA) is a recommended anatomic site for mini-screw insertion. Stability of miniscrew is determined by quantity of bone available in the region.
Objective: To determine bone thickness and height of BSA for optimum placement of miniscrew.
Materials and Methods: This cross-sectional observational study included 40 cone-beam computed tomography (CBCT) scans (23 males, 17 females) of patients aged 19-38 years. Patients were further divided into two age groups 19-28 years and 29-38 years. Measurements were made at 4 different sites: mandibular first molar mesial root (M6) and distal root (D6), second molar mesial root (M7) and distal root (D7). Bone thicknesses were measured at 6 mm and 11 mm apical to the cementoenamel junction (CEJ), and bone heights at 4 mm and 5 mm buccal to the CEJ. Analysis of variance was used to compare bone thickness and height at different sites. Independent t-Test compared the difference in bone thickness and height between gender and age groups.
Results: Bone thickness significantly increased from M6 to D7 at both 6 mm and 11 mm levels (PP
Conclusion: The optimal sites for miniscrew placement in buccal shelf area are distal root of second molar at 6 mm, and mesial and distal roots of second molar at 11 mm apical to CEJ.
Recommended Citation
Shrestha, Roji; Shrestha, Rabindra Man; Dhakal, Jyoti; and Shrestha, Sujita
()
"Evaluation of Mandibular Buccal Shelf Bone Thickness and Height for Miniscrew Placement Using Cone-Beam Computed Tomography,"
Taiwanese Journal of Orthodontics: Vol. 37:
Iss.
4, Article 1.
https://doi.org/10.38209/2708-2636.1387
Available at:
https://www.tjo.org.tw/tjo/vol37/iss4/1
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