| Author, year |
Country |
Study design |
Number
of patients (n)
|
With
drawals
-
dropouts |
Result |
Comments |
Intervention
Fixed retainer |
Control
Removable retainer |
|
| Artun [11] |
USA |
RCT |
n=49
Group 1: n=11
Group 2: n=13
Group 3: n=11
Group 4: n=14 |
?a |
No caries |
No caries |
Group 1= Mandibular cuspid retainer .032 plain wire
Group 2= Mandibular cuspid retainer .032 spiral wire
Group 3= Mandibular 3-3 retainer .0205 flexible spiral wire
Group 4= Removable lower retainer
Cuspid retainer- bonded only to cuspids.
3-3 retainer- bonded to each tooth |
| Cerny [12] |
UK |
CT |
n=61
Group 1: n=46
Group 2: n=43 |
?a |
No caries |
No caries |
Group 1= Permanent bonded retainer (PBR ) (upper or lower)
Group 2= Removable retainer (RR)
Smokers and those >50 years were excluded from analysis. |
| Artun [14] |
Norway |
CT |
n=108
Group 1: n= 31
Group 2: n=18
Group 3: n=14
Group 4: n=20
(Group 5: n= 25) |
?a |
No caries |
No caries |
Group 1= Mandibular cuspid retainer .032 spiral wire.
Group 2= Mandibular cuspid retainer .032 plain wire.
Group 3= Maxillary .0195 flexible spiral wire retainer.
Group 4= Maxillary retainer plate.
(Group 5= No retainer).
Cuspid retainer = bonded only to cuspids.
3-3- retainer = bonded to each tooth. |
