Effect of placement angle on the stability of loaded titanium microscrews in beagle jaws.

Effect of placement angle on the stability of loaded titanium microscrews in beagle jaws. Angle Orthod. 2012 Dec 10; Authors: Xu Z, Wu Y, Zhao L, Zhou Y, Wei X, Tang N, Feng X, Tang T, Zhao Z Abstract Abstract Objective: To evaluate the effect of insertion angle on stability of loaded titanium microscrews in beagle jaws. Materials and Methods: Forty-eight microscrews were inserted at four different angles (30°, 50°, 70°, and 90°) into the intraradicular zones of the mandibular first molars and third premolars of 12 beagles and immediately loaded with a force of 2 N for 8 weeks. Microcomputed tomography (micro-CT) and biomechanical pull-out tests were used to assess osseointegration of the interface. Results: All micro-CT parameters and maximum pull-out force (F(MAX)) of the microscrews were affected by insertion angles of microscrews. Higher micro-CT parameters and F(MAX) were seen for implants inserted at angles between 50° and 70° (P
Source: The Angle Orthodontist - Category: Dentistry Authors: Tags: Angle Orthod Source Type: research

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