Stomatology ›› 2022, Vol. 42 ›› Issue (4): 339-344.doi: 10.13591/j.cnki.kqyx.2022.04.011

• Clinical Research • Previous Articles     Next Articles

Computer-assisted measurement of changes in oral and airway volume in patients with jaw deformity secondary to cleft lip and palate before and after surgery

WU Diqing, LI Zhiping, MENG Jian, CHEN Bin   

  1. Grade 19, The Xuzhou Clinical College of Xuzhou Medical University, Xuzhou 221009,China
  • Revised:2021-10-15 Published:2022-04-28

Abstract: Objective Using computer-assisted three-dimensional reconstruction technology, to measure and compare changes of oral cavity proper and upper airway volume in patients with jaw deformity secondary to unilateral complete cleft lip and palate (UCLP) before and after bimaxillary surgery, and to evaluate the effect of digital surgery guided orthognathic surgery on airway and speech. Method 3D reconstruction of maxillofacial CBCT and oral scan data before and after bimaxillary surgery was operated for 5 patients with jaw deformity secondary to UCLP admitted from July 2015 to December 2019. Mimics 20.0 software was used to divide boundaries of the oral cavity proper and upper airway on 3D model to measure and analyze the oral cavity proper and upper airway volume and related indicators before the surgery as well as one month and three months after the surgery, and patients' ventilation and voice status was followed up before and after the surgery. Results In these 5 patients, there was no significant difference in measurement values of total oral cavity proper volume and upper airway volume before, 1 month and 3 months after bimaxillary surgery (P>0.05). The lower volume, median sagittal area, length, width and length of the mandible of oral cavity proper were significantly reduced (P<0.05), and the upper volume and height were significantly increased (P<0.05). The upper airway volume of the nasopharyngeal segment and velopharyngeal segment was significantly increased after surgery (P<0.05), and the glossopharyngeal segment and the minimum cross-sectional area were significantly reduced (P<0.05). One patient had slight snoring symptoms after operation, and the mandible moved slightly forward 3 months after operation. There was no significant change in speech of 5 patients. Conclusion There is no significant difference in the total volume of oral cavity proper and the total volume of upper airway in patients with jaw deformity secondary to UCLP before and after orthognathic surgery. This parameter can be personalized and slightly adjust the design process of digital surgery, and can effectively assist the implementation of orthognathic surgery in patients with jaw deformity secondary to cleft lip and palate.

Key words: cleft lip and palate, computer-assisted, oral volume

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