Success Rate of the Miniscrews in the Mandibular Buccal Shelf

Evidence-based Selection of Orthodontic Miniscrews, Increasing Their Success Rate in the Mandibular Buccal Shelf: A Randomized, Prospective Clinical Trial

Stability of the orthodontic miniscrews placed in the mandible is still considered to bare higher risk of failure compared to other intraoral locations. The aim of our study was to determine the influence of the miniscrew size on their long-term stability, occurrence of oral mucosa inflammation and pain lasting over 48 hours after implantation.

Inclusion Criteria:

• generally healthy Caucasians
• mild Class III maloclussion that required an absolute anchorage for en-masse distalization in the mandible
• hypodivergent or normal angle between the maxillary and mandibular planes
• excellent oral hygiene

Exclusion Criteria:

• Hyperdivergent angle between the maxillary and mandibular planes
• unfavorable anatomical conditions - e.g. presence of a strong frenulum potentially irritating the miniscrew head during chewing and/or facial movement