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Guided Alveolar Ridge Preservation (G-ARP) with a Subperiosteal Cortical Lamina: A Retrospective Observational Case
Orlando Guerra Cobian1, Giacomo Mainetti2, Franco Bengazi1,2
1Department Oral Surgery, Faculty of Dentistry, University of Medical Science of La Habana, La Habana 10400, Cuba.
Dentistry Journal
|June 25, 2026
Summary
Alveolar ridge preservation using a cortical bone lamina showed minimal dimensional changes post-extraction. This technique offers a viable alternative to particulate grafting, though molar regions may experience greater reduction.
Area of Science:
- Dentistry
- Oral Surgery
- Regenerative Medicine
Background:
- Alveolar ridge preservation is crucial after tooth extraction to maintain bone volume.
- Traditional methods often involve particulate grafting materials.
- Evaluating novel techniques without particulate grafting is essential for clinical advancement.
Purpose of the Study:
- To assess the dimensional stability of alveolar ridges preserved with a subperiosteal cortical bone lamina.
- To compare outcomes with and without particulate grafting material under clinical conditions.
Main Methods:
- Retrospective study of 70 patients undergoing tooth extraction and immediate cortical lamina placement.
- Cone-beam computed tomography (CBCT) scans pre-extraction and ~6 months post-healing.
- Measurement of crestal width and vertical dimensions (buccal, central, lingual).
- Exploratory subgroup analysis by tooth region (anterior, premolar, molar).
Main Results:
- Mean crestal width reduction of -0.6 mm (p=0.001) over ~6 months.
- Buccal height stable; lingual height showed a small reduction (-0.6 mm, p=0.005).
- Central vertical dimension remained unchanged (p=0.531).
- Molar regions exhibited greater dimensional reduction (-2.2 mm) compared to anterior (-0.3 mm) and premolar (0.1 mm) sites.
Conclusions:
- The cortical lamina approach results in limited post-extraction dimensional changes.
- This method is a potential alternative for alveolar ridge preservation without particulate grafting.
- Dimensional stability may be less predictable in molar regions.
