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Magnesium-enriched hydroxyapatite at immediate implants: a histomorphometric study in dogs.

Marco Caneva¹, Daniele Botticelli, Edoardo Stellini

¹UNESP - Faculty of Dentistry of Araçatuba, São Paulo State University, Brazil.

Clinical Oral Implants Research

|December 15, 2010

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Magnesium-enriched hydroxyapatite (MHA) did not significantly preserve buccal alveolar bone crest contours around implants placed immediately into extraction sockets. Bone resorption occurred at both test and control sites after 4 months.

Area of Science:

Dental Implantology
Biomaterials Science
Oral Surgery

Background:

Immediate implant placement into extraction sockets is a common dental procedure.
Maintaining alveolar bone height and contour is crucial for esthetic and functional outcomes.
Magnesium-enriched hydroxyapatite (MHA) is a biomaterial investigated for bone regeneration and preservation.

Purpose of the Study:

To evaluate the efficacy of MHA in preserving bone contour and promoting osseointegration.
To assess the influence of MHA on implants placed immediately into extraction sockets.
To compare bone resorption patterns between MHA-augmented and non-augmented sites.

Main Methods:

Six Labrador dogs received immediate implants in extraction sockets.

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MHA was used as an augmentation material at test sites; control sites received no augmentation.

Histomorphometric analysis was performed after 4 months of submerged healing.

Main Results:

One control implant failed to integrate; 5 test and 5 control implants were evaluated.
Bone resorption was observed at both test and control sites.
Buccal alveolar crest outline maintenance was slightly better in MHA sites (0.7 mm loss) vs. control (1.2 mm loss), but not statistically significant.

Conclusions:

MHA augmentation did not significantly enhance the maintenance of the buccal alveolar bone crest contours.
Further research may be needed to explore MHA's role in immediate implant procedures.
Bone resorption remains a challenge in immediate implant placement, even with augmentation.