## 3 Results  
According to the data presented in Table 1 after two years, the AAS of the published items increased by 28.3%, but only 98 (2.5%) new items gained a positive AAS in the same time period. The Angle Orthodontist and The Journal of Orofacial Orthopedics were the journals that showed the highest increase, with 5.27% and 5.22% of the publications that achieved positive AAS. Only 42 more articles managed to reach an AAS greater than five from 2019 to 2021. In the same time span, the count of Classic citations in both the evaluated database (WOS and Scopus) increased between 110.70 and 114.25%. Progress in Orthodontics and EJO also presented the highest AAS per article in 2021. Comparing the breakdown of different Altmetric data resources after two years (Table 2), we can appreciate that the increase in Tweets is anecdotical in most of the included journals except for the EJO with 43 new tweets and for the Angle Orthodontist with 20 new tweets while in all journals the weight of Tweets in percentage on the total of the Altmetric resources decreased. The same behavior is displayed by Facebook posts with the exception of Progress in Orthodontics, which displayed a 60-post increase, followed by the AJODO with 17 new posts. In all journals except Progress in Orthodontics the weight of Facebook posts in percentage on the total of the Altmetric resources decreased. Google+; Video Uploader; Blogs and Peer reviews display at a global level no or a very slight fluctuation in the studied period, while other Altmetric resources presented a significant increase. News Outlets showed a five-fold increase passing from 61 to 328, but the increase was not homogeneous between the different journals and involved especially the AJODO that passed from 10 to 259 news outlets. Policy sources increased from 3 to 50, in this case, the increase was slight and homogeneous in most journals except for the Angle Orthodontist whose articles were cited 21 times in new policy sources. Only the KJO and the AJO articles were not related to any policy source at the end of the studied period. Patents increased from 13 to 104 with the EJO accounting for almost half of them (53), followed by the Angle Orthodontist with 16 patents. Although Mendeley reader number is not taken into account for the AAS calculation, we can appreciate that the 102% increase of this item is similar to the increase displayed by classic citations. The behavior of the different altmetrics along the studied period can be visually observed in the radar graph (Figure 2) and compared with the one displayed by the classic citations and Mendeley readers number (Figure 3). When the items are stratified by topic (Table 3), the highest AAS is displayed by articles about OHRQoL followed by Others due to the extremely high online attention attracted by the article of [PERSON]. (2015) on the _Evolving concepts of heredity and genetics in orthodontics_[15]. \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c} \hline \hline \multicolumn{1}{c}{JOURNAAL} & \multicolumn{1}{c}{**Year**} & \multicolumn{1}{c}{**Twitter**} & \multicolumn{1}{c}{**Facebook**} & \multicolumn{1}{c}{**Mondelory**} & \multicolumn{1}{c}{**Congle+**} & \multicolumn{1}{c}{**Big**} & \multicolumn{1}{c}{**News Outliers**} & \multicolumn{1}{c}{**Policy Source**} & \multicolumn{1}{c}{**Wiliapolis**} & \multicolumn{1}{c}{**Video Upander**} & \multicolumn{1}{c}{**Fololololololumn{1}{c}{**Folumnumn{1}{c}{**Folumnumn{1}{c}{**Folumn{1}{c}{**Folumn{1}{c}{**  
This article, the second for the AAS magnitude in the sample, is a new entry in relation to what was observed in 2019. Its high AAS is due to the large number of news outlets in which the item was cited. The topic Injuries and complications during treatment on both hard and soft tissues own the highest AAS per published item. When the items were stratified by study design, the highest AAS was displayed by RCTs as in 2019 followed by Observational studies, in contrast to what was observed in 2019 when Systematic reviews were the second study design for AAS.