Related Experiment Video
Updated: Jun 14, 2026
07:09
In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
Published on: March 7, 2014
Marginal bone loss with mandibular two-implant overdentures using different loading protocols: a systematic
1Oral Implantology Research Group, Sir John Walsh Research Institute, School of Dentistry, University of Otago, Dunedin, New Zealand.
The International Journal of Prosthodontics
|March 23, 2010
Summary
This review found that early and immediate loading protocols for two-implant overdentures show no short-term harm to marginal bone levels. However, long-term data is insufficient to fully recommend these protocols for mandibular implant-supported overdentures.
Area of Science:
- Dental Implantology
- Prosthodontics
- Oral Surgery
Background:
- Mandibular two-implant overdentures are a standard for complete denture service.
- Marginal bone loss around implants is a key indicator of implant success.
Purpose of the Study:
- To systematically review and evaluate short- and long-term marginal bone loss associated with mandibular two-implant overdentures.
- To assess different loading protocols for these overdentures.
Main Methods:
- A systematic literature search of MEDLINE, EMBASE, and PubMed was conducted.
- Studies on two oral implants supporting mandibular overdentures with varying loading protocols were reviewed.
- Marginal bone loss and its validity for determining implant success were evaluated.
Main Results:
- Twenty-five studies met the criteria; most focused on short-term outcomes for early/immediate loading.
- High success rates were reported regardless of loading protocol, but radiographic methods lacked standardization.
- First-year marginal bone loss varied: 0.2-0.7 mm (conventional two-stage), 0.0-2.0 mm (one-stage), 0.0-0.2 mm (early), and ~0.7 mm (immediate).
Conclusions:
- Short-term data suggests early and immediate loading protocols do not negatively impact marginal bone levels.
- Long-term data is lacking, making it premature to fully recommend these protocols for mandibular two-implant overdentures.
