Effects induced after the use of maxillary protraction appliances: A literature review

Adanai de Brito FREIRE, Leonard Euler Andrade Gomes do NASCIMENTO, Ana de Lourdes Sá de LIRA

Objective: The present literature review, examined the effects of maxillary protraction in patients treated with different types of facial masks. Methods: The review searched for relevant articles, including randomized controlled trials, controlled clinical trials and uncontrolled trials. Comparisons were made between eight different types of facial masks: Delaire; Grummons; Petit; Turley; Batista; “Sky Hook”; Nanda and Türbinger. Following aspects were evaluated: a) the type of anchorage; the origin, direction and magnitude of forces and b) the relevant results of following skeletal and dental measurements: angular (SNA and SNB), linear (AFAI); vertical angles (SN.GoGn, FMA); dental (IMPA) and linear (1-NA, 1-NB). Conclusion: The results showed that there was no uniformity in the choice of anchorage type and form of application of forces between the facial masks examined, but there were similarities in skeletal and dental aspects: Anterior displacement of the maxillary complex (increase in SNA) ; anterior displacement of the upper anterior teeth (increase of 1-NA), the lingual inclination of mandibular incisors (decrease of 1-NB), down and back rotation of the mandible (increase AFAI, SN.GoGn, FMA, decrease in SNB).

Keywords: Headgear Appliances. Angle Class III malocclusion. Maxilla.

How to cite: Freire AB, Nascimento LEAG, Lira ALS. Effects induced after the use of maxillary protraction appliances: A literature review. Dental Press J Orthod. 2012 July-Aug;17(4):122-8.

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