Intrusion Using Mini Impants: Review Of Literature

Abstract

Achieving precise tooth movement is fundamental for optimal functional and aesthetic results in orthodontics. Among the most challenging movements is intrusion, which involves the vertical movement of a tooth or group of teeth into the alveolar bone. Intrusion is commonly indicated in patients with deep bite, supra-erupted molars, or skeletal discrepancies requiring posterior intrusion for bite correction and facial improvement.

The introduction of mini-implants/temporary anchorage devices (TADs), has significantly transformed orthodontic biomechanics by providing absolute anchorage and minimizing unwanted reciprocal tooth movements.² These small screw-like devices, typically 1.2–2.0 mm in diameter and 6–12 mm in length, can be inserted into alveolar or extra-alveolar bone with minimal surgical intervention and removed after treatment. They are available in titanium alloy, stainless steel, cobalt-chromium, or zirconia and can withstand orthodontic forces without requiring osseointegration, making them highly versatile