Skeletal anchorage-supported systems are used in more complex cases that otherwise would be impossible to treat unless they undergo orthognathic surgery. Because of its susceptibility to relapse, it is essential to evaluate more than the immediate posttreatment results when determining long-term stability. Among those, tongue posture and size, persistence of digital sucking habits, respiratory problems, condylar resorption, and/or unfavorable genetic factors are a few. The associated stability or lack of thereof is under the influence of several factors, especially those AOB etiological factors. Ĭurrently, there is no consensus on whether surgical or non-surgical treatment is the most stable approach for AOB treatment in adult patients. These effects are considered somehow equivalent to those of a maxillary impaction through orthognathic surgery. Skeletal anchorage, by promoting the intrusion of molars into their bony support, facilitates an anti-clockwise rotation of the mandible with the consequent bite closure. With the advent of skeletal anchorage, correction through orthodontic intrusion of the posterior teeth using titanium miniplates or monocortical bone screws became viable. RCTs reporting dropout during the follow-up are in dire need.Īnterior open bite (AOB) can be corrected by orthodontic extrusion of the anterior teeth, by surgical impaction of the maxilla in adult patients, or by the control of molar eruption in growing patients. The level of certainty ranged between very low and low. The stability of AOB through molar intrusion using TADs can be considered relatively similar to that reported to surgical approaches, since 10 to 30% of relapse occurs both in maxillary and mandibular molars. Molar intrusion showed a relapse rate around 12% for the maxillary molars and a 27.2% for mandibular molars. The mean posttreatment follow-up time was 2.5 years (SD = 1.04). Six hundred twenty-four articles met the initial inclusion criteria. Random effects meta-analysis was conducted when appropriate. The quality of evidence was assessed through the JBI tool and certainty of evidence was evaluated through the GRADE tool. Data sources were electronic databases including PubMed, Cochrane Library, Science Direct, Google Scholar, Scopus, Lilacs, OpenGrey, Web of Science, and. A literature search was conducted to identify randomized (RCT) or non-randomized clinical trials based including those considering before and after design. This study was registered in PROSPERO (CRD42016037513). The aim of this systematic review and meta-analysis is to assess the degree of stability of anterior open bite (AOB) treatment performed through the molar intrusion supported with skeletal anchorage at least 1 year posttreatment.
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