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Alveoli and Alveolar Ducts

Alveoli and Alveolar Ducts

The respiratory zone of the human body, which stands in contrast to the conducting zone, comprises the structures that actively participate in the exchange of gases. The initiation of this zone is marked by the terminal bronchioles converging into respiratory bronchioles, the tiniest bronchiole classification. The respiratory bronchioles give way to the alveolar ducts that opens into a congregation of alveoli. Actively involved in gas exchange, alveoli resemble tiny sacs similar to clusters of...

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Related Experiment Video

Updated: Apr 28, 2026

Designing CAD/CAM Surgical Guides for Maxillary Reconstruction Using an In-house Approach

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Published on: August 24, 2018

Guided Alveolar Ridge Preservation (G-ARP) Using a Cortical Lamina: A Pilot Randomized Controlled Trial.

Giacomo Mainetti¹, Franco Bengazi^1,2, Tomaso Mainetti¹

¹ARDEC Academy, 47923 Rimini, Italy.

Dentistry Journal

|April 27, 2026

Summary

This summary is machine-generated.

A novel graft-free technique using a cortical lamina effectively preserved alveolar bone ridge dimensions after tooth extraction, promoting natural bone regeneration and improving outcomes compared to unassisted healing.

Keywords:

alveolar process alveolar ridge augmentation/methods bone regeneration cone-beam computed tomography guided tissue regeneration periosteal inhibition tooth extraction xenografts

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Last Updated: Apr 28, 2026

Designing CAD/CAM Surgical Guides for Maxillary Reconstruction Using an In-house Approach

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Published on: August 24, 2018

Calvarial Model of Bone Augmentation in Rabbit for Assessment of Bone Growth and Neovascularization in Bone Substitution Materials

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Published on: August 13, 2019

Biological Compatibility Profile on Biomaterials for Bone Regeneration

Published on: November 16, 2018

Area of Science:

Dentistry
Oral Surgery
Regenerative Medicine

Background:

Alveolar bone resorption post-extraction negatively impacts aesthetics and dental implant success.
Traditional alveolar ridge preservation (ARP) methods often involve bone grafting.
A graft-free approach is needed to maintain ridge morphology and function.

Purpose of the Study:

To evaluate a novel graft-free technique, Guided Alveolar Ridge Preservation (G-ARP), using a lamina to preserve ridge morphology.
To compare the dimensional changes of alveolar bone using G-ARP versus unassisted healing (CTRL).
To assess the potential for native bone regeneration with the lamina-based approach.

Main Methods:

A randomized controlled study involving 40 alveoli.
The test group received G-ARP with a subperiosteally placed cortical lamina.
The control group underwent unassisted healing.
Cone-beam computed tomography (CBCT) was used for measurements at baseline and 5 months.

Main Results:

The G-ARP group demonstrated a vertical gain of 0.5 mm and minimal horizontal reduction (0.2 mm) after 5 months.
The control group experienced significant vertical bone loss (1.7 mm) and horizontal reduction (2.7 mm).
Regeneration occurred via native bone formation without the need for grafts, with large effect sizes for dimensional preservation.

Conclusions:

Subperiosteal placement of a cortical lamina is an effective graft-free method for preserving alveolar ridge dimensions post-extraction.
This technique offers potential technical and biological advantages over conventional grafting.
The G-ARP approach supports new bone regeneration, enhancing ridge preservation outcomes.