Background This study was conducted to investigate the clinical efficacy of Socket-Shield Technique on the first premolar bone preservation in Orthodontic Extraction Treatment. Methods patients were underwent Orthodontic Extraction Treatment in the First Affiliated Hospital of Guangzhou Medical University were enrolled. Extracted teeth were paired and randomly allocated into two groups: test group (Socket-Shield Technique) and control group. Cone beam computerized tomography were utilized to access the horizontal resorption and vertical resorption at 1mm, 3mm and 5mm from a reference plane of alveolar crest, as well as tooth movement rate at four time-points: before tooth extraction (T0), three months after tooth extraction (T1), the juncture socket-shield was removed (T2) and three months after socket-shield removal (T3).
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Vertical alveolar bone loss
Timeframe: 0 weeks, 3 months, 6 months and 9 months
Horizontal alveolar bone loss
Timeframe: 0 weeks, 3 months, 6 months and 9 months