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Published on: December 30, 2025
Maxillary ridge augmentation with fresh-frozen bone allografts
Cintia Mussi Milani Contar1, João Rodrigo Sarot, Jayme Bordini
1Center for Health and Biological Sciences, Pontifícia Universidade Católica do Paraná, Curitiba, Brazil. cintiacontar@hotmail.com
Summary
Fresh-frozen bone allografts effectively reconstruct maxillary alveolar ridges, providing stable support for dental implants. Histological analysis confirmed mature bone integration, demonstrating their viability as an alternative to autografts.
Area of Science:
- Oral and Maxillofacial Surgery
- Regenerative Medicine
- Dental Implantology
Background:
- Maxillary alveolar ridge defects often require bone grafting prior to dental implant placement.
- Autogenous bone grafts are traditionally used but have limitations.
- Alternative bone graft materials are being investigated for ridge augmentation.
Purpose of the Study:
- To clinically and histologically evaluate fresh-frozen bone allografts for maxillary alveolar ridge reconstruction.
- To assess bone fill and implant support provided by these allografts.
- To determine the efficacy of fresh-frozen bone in preparing the ridge for dental implants.
Main Methods:
- Human tibia fresh-frozen bone chips were used for maxillary reconstruction in 15 patients with atrophic ridges.
- Re-entry procedures were performed after nine months, with bone cores extracted for histological analysis.
- Dental implants were subsequently placed, assessing stability and success rates.
Main Results:
- Allografts were firm, well-incorporated, and vascularized upon re-entry.
- 51 dental implants were successfully placed with high torque, and no implants were lost during 24-35 months of follow-up.
- Histological analysis revealed mature, compact osseous tissue with marrow spaces, indicating living bone.
Conclusions:
- Fresh-frozen bone allografts are a successful graft material for maxillary ridge defects.
- With appropriate surgical techniques, allografts offer a safe alternative to autografts for implant site preparation.
- This method provides effective bone regeneration and reliable support for dental implants.
