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Updated: Jun 17, 2025

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Digital Hybrid Model Preparation for Virtual Planning of Reconstructive Dentoalveolar Surgical Procedures
Published on: August 5, 2021
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A digital in situ bone augmentation workflow for reconstructing the alveolar ridge outline using a modified shell
Xiaomeng Gao1, Xinyu Guo2, Yong Ao2
1Research Assistant, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Clinical Research Center of Oral Diseases, Guangzhou, PR China.
The Journal of Prosthetic Dentistry
|August 12, 2024
Summary
The modified shell technique uses the defect site for bone grafting, avoiding a second surgical site. This in situ approach offers a more controlled method for alveolar bone augmentation.
Area of Science:
- Oral and Maxillofacial Surgery
- Periodontology
- Dental Implantology
Background:
- The traditional shell technique is used for alveolar bone augmentation but has drawbacks.
- These include donor site morbidity and imprecise bone graft harvesting.
- A second surgical site is typically required for bone graft procurement.
Purpose of the Study:
- To introduce and evaluate a modified shell technique for in situ bone augmentation.
- To utilize the root area at the defect site as the in situ donor site.
- To assess the controllability and potential for enhanced bone augmentation.
Main Methods:
- A digitally designed bone harvest guide was developed.
- The modified shell technique was planned and executed using the root area as the in situ donor site.
- This workflow aimed to streamline the bone augmentation procedure.
Main Results:
- The in situ approach eliminated the need for a second surgical site.
- The use of a digitally designed guide facilitated a controllable harvesting procedure.
- The modified technique showed potential for effective bone augmentation.
Conclusions:
- The modified shell technique with an in situ donor site is a viable alternative.
- Digital planning and guides enhance the controllability of the procedure.
- This technique may improve outcomes in alveolar bone augmentation.

