Extra-alveolar mini-implants insertion site in the buccal shelf – systematic review

Vol. 15 – Number 57 – 2022 Systematic review Page 95-102 Extra-alveolar mini-implants insertion site in the buccal shelf – systematic review Marcus Vinicius Neiva Nunes do Rego1 Cristiano Alvarenga Sousa2 Verônica Sousa Pinto2 Pio Thiago Fortes³ Abstract The present study aimed to evaluate, through a systematic review of the literature, the best anatomical area for the installation of extra-alveolar mini-implants in the mandible, buccal shelf region. The research was conducted in the PUBMED, SCOPUS and WEB OF SCIENCE databases and COCHRANE LIBRARY from September 2019 to March 2020. The search strategy included terms related to extra-alveolar mini-implants, skeletal anchorage and thickness of the mandibular bone cortex and resulted in 18585 titles/abstracts of which nine articles were read in full. Five articles were selected for methodological evaluation after the application of the inclusion and exclusion criteria. All the studies were retrospective and most of them with a moderate level of evidence. The results revealed a high success rate of the extra-alveolar miniimplants (around 90%), and in relation to the anatomical region, the area corresponding to the distal of the second molar presented greater cortical thickness and bone width. However, the more distal to the second molar, the greater the proximity of the inferior alveolar nerve. Individual variations were observed, but scientific evidence is lacking regarding the possible interference variables, such as malocclusion type, growth pattern, racial type, age and gender It was concluded that extra-alveolar mini-implants in the buccal shelf region are efficient anchoring resources and the most appropriate place for the installation was the vestibular region to the second molars, at a distance of 4mm to 8mm from the cementoenamel junction, with angulation ranging from 70 to 90 degrees in relation to the mandibular occlusal plane. Descriptors: Orthodontic anchorage procedures, mandible, systematic review. ¹ MSc and PhD in Orthodontics, Post-Doctorate in Orthodontics – UFRJ, Department of Orthodontics – University Center Uninovafapi/PI. ² Graduated in Dentistry, University Center Uninovafapi/PI. ³ Specialist in Orthodontics, University Center Uninovafapi/PI. DOI: 10.24077/2022;1557-185112