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Zirconia and Titanium Implants Placed at Two Supracrestal Levels in Fresh Extraction Socket: Canine Periodontitis
Hyunkyung Kim1, Sungtae Kim1, Young-Dan Cho1
1Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University and Seoul National University Dental Hospital, Seoul, Republic of Korea.
Clinical Implant Dentistry and Related Research
|April 4, 2026
Summary
Zirconia implants show comparable stability to titanium implants in a canine periodontitis model. Zirconia implants demonstrated significantly less marginal bone loss when the rough surface was exposed, suggesting a better peri-implant bone response.
Area of Science:
- Dental Implantology
- Periodontology
- Biomaterials Science
Background:
- Dental implants are crucial for tooth replacement.
- Periodontitis poses challenges for implant success.
- Titanium and zirconia are common implant materials.
Purpose of the Study:
- To compare clinical and radiographic outcomes of titanium vs. zirconia implants.
- To evaluate implants placed supracrestally in fresh extraction sockets.
- To assess outcomes in a canine model with natural periodontitis.
Main Methods:
- 32 titanium and zirconia implants were placed in 8 dogs.
- Implants were placed in fresh extraction sockets with 0mm or 1mm rough surface exposure.
- Evaluations included mucosal tissue inflammation, implant stability quotient (ISQ), and marginal bone loss (MBL) at 6, 12, and 18 weeks.
Main Results:
- Zirconia implants showed stability and soft tissue response comparable to titanium.
- Marginal bone loss (MBL) was significantly lower with zirconia implants (0.32mm) compared to titanium (0.71mm) when rough surfaces were exposed.
- Mucosal tissue inflammation (MTI) scores were slightly higher for zirconia but did not impede osseointegration.
Conclusions:
- Titanium and zirconia implants exhibit similar stability in a periodontitis model.
- Zirconia implants demonstrate superior marginal bone preservation compared to titanium under conditions of rough surface exposure.
- Zirconia may offer a more favorable peri-implant bone response in challenging periodontal situations.
