The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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A study of upper airway dimensional change according to maxillary superior movement after orthognathic surgery

양악 수술 시 상악골 상방 이동에 따른 상기도 변화

  • Kim, Yong-Il (Department of Orthodontics, School of Dentistry, Pusan National University) ;
  • Park, Soo-Byung (Department of Orthodontics, School of Dentistry, Pusan National University) ;
  • Kim, Jong-Ryoul (Department of Oral and Maxillofacial Surgery, Pusan National University)
  • 김용일 (부산대학교 치과대학 교정학교실) ;
  • 박수병 (부산대학교 치과대학 교정학교실) ;
  • 김종렬 (부산대학교 치과대학 구강악안면외과학교실)
  • Published : 2008.04.30
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Abstract

Objective: The purpose of this study was to evaluate the upper airway dimensional change according to maxillary superior movement after orthognathic surgery and to identify the relationship between the amount of maxillary movement and upper airway dimensional changes. Methods: The samples consisted of 24 adult patients (9 males and 15 females) who had a skeletal discrepancy and had received presurgical orthodontic treatment. They underwent Le Fort I superior impaction osteotomy and mandibular setback surgery. Cephalometric x-rays were taken at 3 stages - T0 (before orthognathic surgery), T1 (just or within 2 weeks after orthognathic surgery), T2 (6 months after surgery) Results: 1, Pharyngeal airway space (PAS (R)-nasopharynx) was decreased after surgery (T1) but recovered at 6 months after surgery; 2, Pharyngeal airway space (PAS (NL)-palatal plane) was increased after surgery and at 6 months after surgery; 3, Pharyngeal airway space (PAS (OL)-occlusal plane) was increased at T1 and was decreased at T2; 4, Soft palate thickness was increased at T1 but it became the same or thinner at T2; 5, There is no statistically significant relation between the amount of maxillary superior movement and pharyngeal airway space. Conclusions: These findings suggested that the maxillary superior movement of about an average of $4.40{\pm}1.14 mm$ did not affect upper pharyngeal airway space changes.

양악 수술 시 상악골의 상방이동을 시행하였을 경우에 상기도의 공간적 구조변화를 평가하기 위하여, 술전, 술후, 술후 6개월 후의 간격으로 두부규격방사선사진을 촬영하여 그 변화량을 분석해 보았다. 술전 교정치료를 시행하여 상악은 Le Fort I 골절단술로 상방이동 시행하였고 동시에 하악은 후방이동 시키는 수술을 시행 받은 24명을 대상으로 하였다 (평균 연령22세 1개월, 남자 9명 여자 15명). 상악골 상방이동에 대한 상기도 공간의 변화와 그에 따른 관련성을 조사한 결과, PAS (R)부위는 술후 (T1) 감소하였으나 (p<0.01) 술후 6개월 후(T2)에는 다시 증가하여 술전과 비교 시, 크기 변화를 관찰할 수 없었고, PAS (NL) 부위는 술후(T1)와 술후 6개월 후(T2)에서 유의성 있는 크기 증가를 보였다. PAS (OL)의 경우, 술후 (T1)증가를 보이다가 술후 6개월 이후(T2)에서 감소하였다. 연구개의 두께는 술후 (T1) 증가를 보이다가 6개월 이후 (T2) 처음과 같거나 약간 감소하는 것으로 나타났으며 FH-uvular 각도는 술후 6개월 이후 증가하였다. 또한 상악골 상방이동에 대한 상기도 공간의 변화를 회귀분석 시행한 결과 양악수술 시 평균 $4.40{\pm}1.14mm$의 상악골 상방이동은 양악 수술 후 상기도 공간의 변화에 큰 영향을 미치지 않는 것으로 나타났다.

Keywords

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