Study

Follow-up period

Age (mean, years)

Implant system

Implant size (mm)

Intervention

Control

Outcomes

Mini

Conventional

Aunmeungtong 2017

12 months

Two mini: 69.26 ± 11.2;

Four mini: 66.65 ± 6.28;

Conv: 73.8 ± 10.4

PW plus® (Nakhon Pathom, Thailand)

D = 3.0

L = 12

D = 3.75

L = 10

40 patients received immediate loading of mini-implants (20 two and 20 four implants).

20 patients received immediate loading with two conventional-sized implants.

Implantation success rate, radiographic bone level changes, prosthodontic complications and patient satisfaction.

Threeburuth 2018

12 months

64.1 ± 5.56

PW plus® (Nakhon Pathom, Thailand

D = 3.0

L = 12

D = 3.75

L = 10

15 patients received immediate loading of two mini-implants.

15 patients received immediate loading of two conventional dsized implants.

Radiographic bone loss, patient satisfaction and implantation success rate.

Zigogiannis 2017

12 months

67.9 ± 7.7

Straumann implants, Isntitut Straumann

D = 1.8, 2.1 or 2.4

L = 10 - 18 (range)

D = 3.3 or 4.1

L = 10 or 12

25 patients received immediate loading of four mini-implants.

15 patients received immediate and 10 received delayed loading of two standard-sized tissue-level implants.

Marginal bone loss, success and survival rates.

Omran 2013

12 months

Not available

Sendax MDI MAX; IMTEC, Corp., Ardmore,

USA) and

Tapered Internal dental implant system, Biohorizons

Co., USA

D = 1.8

L = 15

Normal sized

7 patients received immediate loading of four mini-implants mandibular overdentures opposing a maxillary complete denture

7 patients received immediate loading of two ball attachments carried on two normal-sized implants.

Marginal bone height changes.