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Updated: Feb 8, 2026

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Published on: April 1, 2015
The Rigid-Shield Technique: A New Contour and Clot Stabilizing Method for Ridge Preservation
Alessandro Mattiola1, Dieter Bosshardt2, Patrick R Schmidlin3
1Private Practice, Bahnhofstrasse 6, 5610 Wohlen, Switzerland. amattiola@bluewin.ch.
This study introduces a novel degradable membrane for alveolar ridge preservation after tooth extraction. The technique successfully promoted bone regeneration and enabled ideal implant placement without bone graft materials.
Area of Science:
- Dentistry
- Regenerative Medicine
- Biomaterials
Background:
- Alveolar bone loss following tooth extraction necessitates ridge preservation techniques.
- Guided bone regeneration (GBR) often uses filler materials and membranes.
- Existing methods aim to stabilize extraction sockets for future implantology.
Observation:
- A novel approach utilized a degradable polylactic acid membrane with a collagen matrix.
- This method aimed to reshape the alveolar wall and stabilize soft tissues.
- The technique was applied in a case with an unfavorable initial situation.
Findings:
- Clinical, radiographic (CBCT), and histologic evaluations demonstrated successful osteoneogenesis.
- The implant was ideally placed and circumferentially surrounded by bone.
- The minimally invasive method avoided filler materials and socket entrance coverage.
Implications:
- This technique offers a potential new approach to socket preservation without bone grafts.
- It may provide enhanced soft tissue stabilization during bone matrix formation.
- Further controlled research is required to validate this innovative method.
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Consider two children sitting on a seesaw, which has negligible mass. The first child has a mass (m1) of 26 kg and sits at point A, which is 1.6 meters (r1) from the pivot point B; the second child has a mass (m2) of 32 kg and sits at point C. How far from the pivot point B should the second child sit (r2) to balance the seesaw?