The purpose of this randomized clinical trial study was to investigate the patient satisfaction , component costs , treatment time and survival Rate of mandibular over denture retained by one (midline) or two (bilateral)implants after immediate loading.
Methods:
fourteen patients with problematic conventional complete dentures were enrolled in the study (mean age 62/8 years) (42-79 y) . The chief complaint of the patients was poor retention of the mandibular dentures . subjects were randomized to receive either one midline or two bilateral mandibular implants (Implantium . Dentium co.Republic of korea) .All the implants installed were 3.8×10mm . Implant stability was measured by periotest device (Medizin technik .Gulden Germany) . The kerator attachments Placed and the patients mandibular dentures were relined to incorporate implant retention . subjects indicated on a visual analogue scale satisfaction with their denture before installation of implants and at 8 months after implant surgery .statistical analyses used were Mann-U-whitney nonparametric rank test , Signed rank test and T-Test.
Results:
All the subjects completed the 8 months follow up time . the mean satisfaction rate was 93(max100 - min 87) in the single implant group and 94 (Max 100 - min89) in the group consisted of two implants .(P>0.5) it is clearly obvious that the single implant group had significantly lower component costs (P<0.001) and lower treatment times for surgery (P=0.002) and denture reline (P<0.001) . the survival rate of all implants in both groups were 100% .
Conclusions:
lower component costs and treatment time , with comparable patient satisfaction over the 8 months follow up indicate that a mandibular over denture retained by a single midline implant may be an alternative to the customary over dentures retained by two implants for poor socioeconomical patients .