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Factors Affecting Total Treatment Time in Patients Treated With Orthognathic Surgery Using the Surgery-First Approach: Multivariable Analysis Using 3D CT and Scanned Dental Casts

 Jun-Young Kim  ;  Jin Hoo Park  ;  Hwi-Dong Jung  ;  Young-Soo Jung 
 JOURNAL OF CLINICAL MEDICINE, Vol.9(3) : 641, 2020-02 
Journal Title
Issue Date
digital dentistry ; orthognathic ; scanned casts ; surgery-first approach ; treatment time
The aim of this study was to analyze factors affecting treatment times in patients treated with the surgery-first approach (SFA) for orthognathic surgery. Fifty skeletal class III patients who had undergone SFA bimaxillary orthognathic surgery were enrolled. Retrospective chart reviews and analysis of 3D CT and digitally scanned casts were conducted to assess the total treatment time. Statistical analysis was then performed with multiple study variables. Longer treatment times were required for patients with severe maxillary or mandibular teeth crowding (p = 0.009), a preoperative anterior open bite (p = 0.021), and those undergoing orthodontic extractions (p < 0.001). Longer treatment times were also observed when setting surgical occlusion in the postoperative anterior open bite (p = 0.007) and in patients with postoperative dental midline deviation (p < 0.001) and transverse maxillary deficiencies (p = 0.035). Treatment times were shorter when a class I molar key was formed in the surgical occlusion setup (p = 0.002) and in bilateral anterior and posterior occlusion with a minimum of four contact points (p < 0.001). The number of contact points, the number of extracted teeth, and postoperative midline deviation were identified as significant predictors. These results suggest that proper patient selection is important when considering SFA and that surgeons can reduce total treatment time with an appropriate surgical occlusion setup.
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2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Jun-Young(김준영) ORCID logo https://orcid.org/0000-0002-6596-6135
Park, Jin Hoo(박진후) ORCID logo https://orcid.org/0000-0003-2337-9554
Jung, Young Soo(정영수) ORCID logo https://orcid.org/0000-0001-5831-6508
Jung, Hwi Dong(정휘동) ORCID logo https://orcid.org/0000-0003-1025-8323
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