From: Clinical and satisfaction outcomes of using one or two dental implants for mandibular overdentures: preliminary short-term follow-up of a randomized clinical trial
N (subjects)
Minimum
Maximum
Average
S.D.
General maintenance
18
1
5
2.78
1.309
Two implants
10
2.20
1.135
One implant
8
2
3.50
1.190