- Characteristics of study or subgroup
- McEwan (a) [32]: self-drilling insertion with 3Â M implants with implant-root contact versus without implant-root contact
- McEwan (b) [32]: self-drilling insertion with Tomas implants with implant-root contact versus without implant-root contact
- Wilmes et al. (a) [33]: pre-drilling insertion with implant-root contact versus without implant-root contact
- Wilmes et al. (b) [33]: pre-drilling insertion with implant-root penetration versus without implant-root contact