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Occlusal Pressure Redistribution with Single Implant Restorations
Miguel A Roque1, German O Gallucci1, Sang J Lee1
1Department of Restorative Dentistry and Biomaterials Science, Harvard School of Dental Medicine, Boston, MA.
Summary
Placing posterior implant restorations significantly increases bite pressure where they are located and decreases it on the opposite side. This finding is crucial for understanding occlusal force redistribution in dental arches.
Area of Science:
- Dental Implantology
- Biomechanical Analysis
- Prosthodontics
Background:
- Occlusal forces are critical for maintaining dental arch health.
- Understanding how implant restorations affect natural dentition is essential for long-term success.
- Previous research has not fully elucidated the biomechanical impact of single posterior implants on overall occlusal pressure distribution.
Purpose of the Study:
- To quantify the redistribution of occlusal pressure in dental arches after the placement of single posterior implant-supported restorations.
- To compare occlusal pressure distribution before and after the insertion of all-ceramic implant crowns.
- To analyze the statistical significance of pressure changes in different sextants of the dental arch.
Main Methods:
- A study involving 15 patients with osseointegrated single posterior implant restorations.
- Fabrication and delivery of cement-retained, all-ceramic implant crowns.
- Utilized a digital sensor to measure occlusal contact point forces as a percentage of total applied pressure.
- Recorded measurements pre- and post-restoration to assess changes in occlusal stress distribution.
Main Results:
- Placement of posterior implant restorations led to a statistically significant average increase of 4.18% in bite pressure within the affected sextants (p = 0.019).
- A significant decrease of 2.9% in occlusal load was observed in the contralateral sextant (p = 0.047).
- No significant differences in pressure distribution were found among specific tooth positions within the sextants.
Conclusions:
- Single posterior implant restorations demonstrably alter occlusal pressure, increasing it in the ipsilateral sextant and decreasing it contralaterally.
- Posteriorly placed implant restorations showed a trend towards reducing occlusal pressure on anterior dentition.
- These findings highlight the importance of considering biomechanical load redistribution when planning and placing posterior dental implants.
