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Vertical alveolar bone distraction at molar region using lag screw principle
Soon-Jung Hwang1, Jong-Geul Jung, Ji-Ung Jung
1Department of Oral and Maxillofacial Surgery, College of Dentistry, Seoul National University, Seoul, Korea. sjhwong@snu.ac.kr
Summary
A novel device utilizing the lag screw principle enables effective vertical alveolar bone distraction in the molar region. This innovative approach simplifies the surgical technique and achieves successful bone augmentation without complications.
Area of Science:
- Dental Implantology
- Oral and Maxillofacial Surgery
- Biomaterials Engineering
Background:
- Alveolar bone distraction is a common procedure for bone augmentation.
- Existing devices have limitations, particularly for posterior alveolar ridge distraction.
- A need exists for improved devices for molar region alveolar bone distraction.
Purpose of the Study:
- To develop a new device for vertical alveolar bone distraction in the molar region.
- To evaluate the clinical efficacy and application of the newly developed device.
Main Methods:
- The device employs a lag screw principle with four components: distraction screw, hole implant fixture, supporting plate, and temporary fixation.
- The distraction screw moves the alveolar transport segment via the hole implant fixture without vertical screw movement.
- Pre-clinical animal studies were followed by clinical application in four patients.
Main Results:
- Successful alveolar bone distraction was achieved in all patients without complications.
- The device allowed for adjustable distraction, enabling both vertical and horizontal bone expansion.
- The surgical technique was simple, required no second surgery, and avoided occlusal disturbances.
Conclusions:
- The new lag screw-based device is effective for alveolar bone distraction in the molar region.
- This device offers a simplified and versatile solution for posterior alveolar ridge augmentation.