Table 2 Summary of inclusion and exclusion criteria.

From: Soft tissue expansion using self-inflating osmotic hydrogel expanders prior to bone augmentation: healing and complications. Evidence-based review

Inclusion criteria

Exclusion criteria

• Randomized Controlled trials (II)a

• Cohort studies (III)a

• Case-control studies (IV)a

• Case-series (IV)a

• Not restrictions on date

• No restrictions on sample size

• No restrictions on gender

• No restrictions on bone augmentation technique or materials

• Case reports (V)a

• Animal studies (V)a

• Laboratory studies (V)a

• Reviews, editorials, letters, commentaries, or conference abstracts

• Systematic reviews and meta-analyses

• Non-English articles

• Studies not using SOHTEs for STE

• Studies using SHOTEs extraorally

• Duplicate Studies

  1. aStudies were categorised using the Oxford Centre for Evidence-Based Medicine Levels of Evidence classification system [34].