Study Study type Follow-up (mean) Sample size Number of implants Early complications Late complications
Maxilla Mandible Patients
(%) 		Implants
(%) 		Period after restauration Patients
(%) 		Implants
(%)
Turkyilmaz et al. [33] Retrospective 1 years 10 12 11 0 0 - 0 0
Anner et al. [34] Retrospective 30.82 months 475 (49 DM+; 426 DM-) 1626 (non-distinguished) Unknown Unknown 24.71 months 12.2
8.2 (CD+)
12.7 (CD-) 		4,7
2.8 (CD+)
5 (CD-)
Oates et al. [35] Prospective Pilot 4 months 32 42 (non-distinguished) 0 0 - 0 0
Dowell et al. [36] Prospective Pilot 4 months 35 16 34 0 0 - 0 0
Tawil et al. [37] Prospective 42.4 months 90 (45 DM+; 45 DM-) 499 (255 DM+; 244 DM-) Unknown 0.97% (in < 7% HbA1c gr)
3.5 % (in 7 - 9% HbA1c gr)
9% (in a group of one person with > 9% HbA1c) 		3 years 2 (1 patient DM+) 0.4 (1 implant)
Khandelwal et al. [38] Prospective
(controlled trial) 		16 weeks 24 48 Unknown 38% (SLA)
33% (modSLA)
Not osseointegrated: 2% (1 SLA implant) 		- 0 0

DM+ = diabetes mellitus patients; DM- = diabetes mellitus free; HbA1C = glycated haemoglobin; SLA/modSLA = specific implant type, reported by author.