*3.1. Selection of Studies*

The initial search yielded 122 articles. After applying the inclusion criteria and eliminating duplicate entries, the selected studies were 37. After reading the abstracts, 17 studies were selected and finally, after the full reading of the articles, only 7 fulfilled the criteria (Figure 1). The data obtained is summarized in Table 1.

#### *3.2. Study Design*

Table (c) was created to extract data from the selected articles [28–34]. The characteristics of the studies, their objectives, and the results and conclusions obtained were assessed separately.

Three randomized controlled clinical trials (RCT) [28,30,31], three controlled clinical trials [29,33,34], and one case series [32] were included. All clinical trials had a control group comparable to the study group, and three of them used the contralateral side as the control group [28,29,31].

According to the SORT criteria [27], we can state that all RCT [28,30,31] are level 1, and the controlled clinical trials [29,33,34] can be marked as level 2, and finally the case series [32] can be staged as a level 3.

**Figure 1.** PRISMA flowchart.
