Immediate versus early loading of two implants

gennaio 1, 2008 in Articoli, Carico Immediato

Immediate versus early loading of two implants placed with a flapless technique supporting mandibular bar-retained over dentures: a single-blinded, randomised controlled clinical trial

Gioacchino Cannizzaro, Michele Leone, Marco Esposito

  • Purpose: To evaluate the efficacy of immediate loading versus early loading at 6 weeks of bar-re- tained mandibular overdentures supported by two implants placed with a flapless technique. Materials and methods: Sixty patients were randomised: 30 to the immediately loaded group and 30 to the early loaded group. To be immediately loaded, implants had to be inserted with a mini- mum torque > 48 Ncm. Outcome measures were prosthesis and implant failures, biological and biomechanical complications, patient satisfaction, and Implant Stability Quotient (ISQ) assessed with a resonance frequency analysis instrument.
  • Results: Sixty implants were placed in each group. Flaps had to be raised in nine patients to check drill direction or to better visualise the area after multiple teeth extraction. Two implants in two pa- tients did not reach the planned insertion torque and were immediately replaced by larger diame- ters ones. After 1 year no drop out occurred and two early loaded implants failed in two patients. There were no statistically significant differences between groups for prosthesis failures, implant losses, complications, and mean ISQ values; however, patients in the immediately loaded group were significantly more satisfied than those loaded early. When comparing mean ISQ values taken 6 weeks after placement with 1-year data within each group, values decreased significantly.
  • Conclusions: Mandibular overdentures can be successfully loaded the same day of implant place- ment with a minimally invasive surgery, increasing patient satisfaction while decreasing treatment time and patient discomfort. No apparent advantages were seen when loading the overdentures at 6 weeks.