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The objective of this study was to assess the validity of the IOTN-AC in the assessment of aesthetic impairment in bimaxillary protrusion patients.

The article informs about a systematic review and meta-analysis comparing the effects of four first premolar extraction and nonextraction orthodontic treatments on intra-arch width, profile, treatment duration, occlusal outcomes, smile aesthetics, and stability. Topics include the debate between extraction and nonextraction treatments, historical perspectives, and a comprehensive analysis of outcomes, emphasizing the need for further high-quality research in the field.

Background Root resorption can be considered the most unfortunate complication of orthodontic treatment. Objective To evaluate the available evidence regarding orthodontically induced inflammatory root resorption (OIIRR). Search methods A comprehensive literature search was conducted for the systematic reviews investigating OIIRR published up to 24 May 2020. This was accomplished using electronic databases: MEDLINE via OVID, EMBASE, AMED (Allied and Complementary Medicine Database), PubMed, and Web of Science. Any ongoing systematic reviews were searched using Prospero and a grey literature search was undertaken using Google Scholar and OpenGrey (www.opengrey.eu/). No language restriction was applied. Selection criteria Only studies investigating OIIRR were included. Data collection and analysis Screening, quality assessment [using the AMSTAR 2 tool (A Measurement Tool to Assess Systematic Reviews)], and data extraction were performed by two authors independently. Information was categorized and narratively synthesized for the key findings from moderate and high-quality reviews. Results A total of 2033 potentially eligible studies were identified. After excluding the non-relevant studies, 28 systematic reviews were included. Of which, 20 systematic reviews (71.5%) were of moderate and high-quality level of evidence. The incidence and severity of OIIRR increase with the fixed appliance, especially with heavy force, intrusion, torqueing movements, increased treatment duration, and treatment with extractions or with long apical displacement (particularly for maxillary incisors). There was insufficient evidence regarding most other treatment- and patient-related factors on OIIRR. Following all precautionary measures, pausing treatment and regular monitoring benefits patients with OIIRR. Conclusions and implications There is a limited number of high-quality studies in terms of OIIRR. The influence of fixed appliance on root resorption was noted; however, the cause and effect relationship between OIIRR and orthodontic biomechanics has not been confirmed. Avoiding heavy, continuous forces and a greater amount of apical displacement over a long duration of treatment is recommended. Precautionary measures should be carefully considered when treating patients with a high risk of OIIRR. Registration CRD42020166629. [ABSTRACT FROM AUTHOR]

Background Patient perception with fixed appliance orthodontic treatment is important to improve oral health-related quality of life. Objective The main objective of this study was to evaluate the impact of labial fixed appliance orthodontic care on patient perception before, during, and after the treatment. Search methods Relevant systematic reviews investigating patient perception with fixed appliance orthodontic treatment were identified by searching electronic databases: MEDLINE via OVID (1946 to 31 December 2018), EMBASE (1974 to 31 December 2018), AMED (Allied and Complementary Medicine Database; 1985 to November 2018), PubMed (inception to 31 December 2018), Web of Science (1900 to 2018), and PsychINFO (1806 to 31 December 2018). Ongoing systematic reviews were searched using Prospero and a grey literature search was undertaken using Google Scholar and OpenGrey (www.opengrey.eu/). No language restriction was applied. Selection criteria Only studies investigating patient perception of fixed appliance orthodontic treatment were included. Data collection and analysis Screening, quality assessment [using the AMSTAR 2 tool (A Measurement Tool to Assess Systematic Reviews)], and data extraction were performed by two authors independently. Information was categorized and narratively synthesized for the key findings. Results A total of 163 articles investigating patient expectation, experience, and satisfaction with conventional ligation labial fixed orthodontic appliances were obtained. Of these, 152 observational or interventional studies were excluded, resulting in 11 eligible systematic reviews. Two were excluded as earlier reports of a Cochrane review. The quality of the reviews was variable (critically low, low, and moderate). The findings were as follows: aesthetics represents a primary motive for orthodontic treatment; a temporary deterioration in the quality of life occurs during the initial phases of treatment; gender and ethnicity factors do not have an impact on patient perception of treatment; and a positive relationship between orthodontist–patient–parent is important to achieve patient compliance and satisfaction. Conclusions There is a lack of high-quality studies in terms of systematic reviews and meta-analyses for assessing patient perception with fixed appliance orthodontic treatment. The aesthetic impact of malocclusion is the main motive for seeking orthodontic treatment. Quality of life reduces during the initial stages of orthodontic treatment but improves in the later stages of treatment. Assessment before, during, and after orthodontic treatment is necessary to comprehensively assess patient perception at all stages of care. Trial registration CRD42019122653. Conflict of Interest None to declare. [ABSTRACT FROM AUTHOR]

To evaluate systematically the effectiveness of miniscrew-supported maxillary incisor intrusion compared with other nonsurgical intrusive mechanics for deep-bite correction. Unrestricted electronic searches in Embase, Web of Science, MEDLINE, LILACS, and Cochrane's CENTRAL as well as manual searches were conducted up to August 2019. Only randomized clinical trials (RCTs) were included. Study selection, data extraction, and bias assessment were done by two independent reviewers. The Cochrane risk-of-bias tool was used, and the quality of evidence was graded using the GRADE approach. A random-effects meta-analysis of continuous data, with its 95% confidence intervals (CIs), was used. Seven RCTs were included in the quantitative synthesis, and the overall quality of evidence was very low to low. When compared with intrusion arches, miniscrews resulted in a more efficient deep-bite reduction with a standardized mean difference (SMD) of −0.48 (95% CI, −0.89 to −0.07). When miniscrews were used, a statistically significant difference was observed favoring less maxillary molar extrusion (SMD, −0.86; 95% CI, −1.46 to −0.27) and more incisor intrusion as measured from centroid to palatal plane (SMD, −0.95; 95% CI, −1.41 to −0.49). Results also showed a statistically nonsignificant difference regarding the amount of resultant root resorption between miniscrews and intrusion arches. There is weak evidence indicating efficient deep-bite correction using miniscrews. Root resorption seems to be an associated adverse effect that occurs regardless of the intrusive mechanics used. These conclusions should be viewed with great caution as further well-designed long-term research is recommended. [ABSTRACT FROM AUTHOR]