NCT07320417

Schneider Membrane Preservation With In Situ Osteogenesis: A Modified Maxillary Resection Study

Schneider Membrane Preservation Combined With In Situ Osteogenesis Strategy: A Feasibility Study of a Modified Maxillary Resection

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 18 (estimated)
• Sponsor: Wenzhao Guan · Academic / Other
• Sex: All
• Age: 18 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

This case series study aimed to find out if a new surgical technique that preserves the sinus membrane during upper jaw removal can help patients regenerate bone and recover function better after surgery. The study included two female patients with jaw tumors who were not suitable for or did not want complex reconstruction with tissue flaps. The main questions the study tried to answer were: Can the preserved sinus membrane help new bone grow spontaneously in the jaw defect area after surgery? Can this new method reduce common complications seen with traditional surgery, such as oronasal fistula and empty nose syndrome? How well can patients recover in terms of chewing, swallowing, speech, and quality of life after the procedure? In the study, during surgery, the surgeon carefully separated and preserved the sinus membrane from the bone that needed to be removed. After surgery, patients were followed with regular CT scans to check new bone growth. They also underwent tests to measure chewing force, swallowing ability, speech function, and quality of life to evaluate the long-term outcomes of this technique.

Conditions

• Maxillary Diseases

Interventions

Type	Name	Description
PROCEDURE	chneiderian Membrane-Preserving	1\. Perform preoperative imaging evaluation of the patient to observe the condition of the maxillary sinus bony walls. During surgery, flap the tissue to expose the anterior wall of the maxilla, and create a window in the normal bone area of the anterior wall (approximately 10×15mm in diameter); 5. Carefully insert the maxillary sinus elevation instrument between the maxillary sinus membrane and the maxilla, delicately separate the maxillary sinus membrane while maintaining its integrity, and elevate the membrane to the required height. 6\. Place a wet gauze between the elevated membrane and the maxilla to protect the Schneiderian membrane, use an ultrasonic osteotome or reciprocating saw to remove the pathological tissue, and confirm negative margins intraoperatively with frozen section.

Timeline

• Start date: 2025-05-01
• Primary completion: 2026-06-08
• Completion: 2026-06-10
• First posted: 2026-01-06
• Last updated: 2026-01-27

Locations

1 site across 1 country: China