Evaluation of effectiveness and stability of aligner treatments using the Peer Assessment Rating Index

Effectiveness and Stability of Treatment with Orthodontics Clear Aligners: What Evidence?

“…Graf and al. [19] also concluded that conventional attachments and the combination with optimized attachments equally led to treatment effectiveness regarding the total PAR score reduction with equally achieved effectiveness in mild, moderate, and rather severe cases. However, for Class II malocclusion, Patterson et al [31] reported that there was no significant Class II correction or overjet reduction with elastics for an average of 7-month duration in the adult population.…”

“…As far as the malocclusion type is concerned, the study by Graf et al [19] showed that Invisalign® treatments are able to significantly reduce malocclusions in adult patients. The study found that all types of sagittal malocclusion (class I, class II, and class III) were 'greatly improved' with a rate of 77.44%.…”

“…Of the eleven included articles, there were five retrospective studies [6,[14][15][16][17], two prospective studies [7,11], two randomized controlled trials (RCT) [18,19], two systematic reviews [2,20] and one meta-analysis [20]. Most of the included studies evaluated mild to moderate malocclusions except for one [17] that involved first premolar extraction cases.…”

“…Nine of the covered studies assessed predictability of tooth movements comparing post-treatment patient models to the predicted digital planned tooth movement models [2,6,7,11,[14][15][16][17][18]. Two studies assessed the stability of the clear aligner therapy [19,20].…”

“…According to the SBU tool (Tables 1 and 2), among the selected studies, the methodological quality was low for four studies [6,11,16,17], moderate for four others [7,14,15,19] and high for one study [18] (Table 5). Thus, conclusions with a moderate level of evidence could be drawn from the review process.…”