Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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THREE-DIMENSIONAL SPACE CHANGES AFTER PREMATURE LOSS OF THE PRIMARY FIRST MOLAR: A LONGITUDINAL STUDY

제1유구치의 조기 상실로 인한 공간 변화에 대한 3차원적 분석

  • Kim, Ji-Yeon (Department of Pediatric Dentistry, Samsung Medical Center Sungkyunkwan University School of Medicine) ;
  • Jung, Da-Woon (Department of Pediatric Dentistry, Samsung Medical Center Sungkyunkwan University School of Medicine) ;
  • Kwak, So-Youn (Department of Pediatric Dentistry, Samsung Medical Center Sungkyunkwan University School of Medicine) ;
  • Yoo, Seung-Eun (Department of Pediatric Dentistry, Samsung Medical Center Sungkyunkwan University School of Medicine) ;
  • Park, Ki-Tae (Department of Pediatric Dentistry, Samsung Medical Center Sungkyunkwan University School of Medicine)
  • 김지연 (성균관대학교 의과대학 삼성서울병원 치과진료부 소아치과) ;
  • 정다운 (성균관대학교 의과대학 삼성서울병원 치과진료부 소아치과) ;
  • 곽소연 (성균관대학교 의과대학 삼성서울병원 치과진료부 소아치과) ;
  • 유승은 (성균관대학교 의과대학 삼성서울병원 치과진료부 소아치과) ;
  • 박기태 (성균관대학교 의과대학 삼성서울병원 치과진료부 소아치과)
  • Published : 2008.05.30
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Abstract

The purpose of this study was to evaluate a 3-Dimensional laser scanner for the space analysis after loss of a primary first molar. Six children with premature loss of a primary first molar were examined using study models taken before and after the extraction. The results were as follows: 1. There was no change in primary molar space after the extraction of a maxillary primary first molar However, 2 out of 3 children experienced primary molar space loss in extraction side of a mandibular primary first molar. 2. Arch width and arch perimeter showed no difference between initial and final model. 3. All primary canines did not show any changes in inclination. Maxillary primary second molars had similar changes in both extraction and control side. However, 2 out of 3 mandibular primary second molars in extraction side showed more lingual tipping compared to control side. Mandibular permanent first molars tipped more lingually in extraction side. 4. In angulation, primary canines showed nothing of significance. Mandibular primary second molars tipped more mesially in extraction side than in control side. Maxillary permanent first molars have increased distal angulation after extraction of primary first molars in both side.

본 연구는 제1유구치의 조기 상실 시공간 변화에 대한 분석을 위하여 3-Dimensional Laser Scanner를 이용하여 그 유용성을 평가하고자 하는 예비논문이다. 6세-8세 사이의 제1대구치가 맹출하여 확실한 교합 관계를 이루는 혼합치 열기 어린이 중 편측 제1유구치의 조기 발치가 필요한 6명의 발치 전 후의 모형을 이용하여 다음과 같은 결과를 얻었다. 1. 유구치 공간변화는 상악은 실험군과 대조군 모두 현저한 감소를 보이지 않았고, 하악은 실험군에서 3명 중 2명에서 공간감소가 관찰되었다. 2. 치열궁 너비, 치열궁 둘레는 초기모형과 최종모형에서 비슷한 값을 보였다. 3. 협설측 경사도 변화는 유견치에서는 상하악 모두 특별한 경향을 보이지 않았으며, 제2유구치는 상악은 실험군과 대조군이 유사하였고, 하악에서는 3명중 2명에서 실험군이 더 큰 설측경사도 변화를 보였다. 제1대구치는 하악에서 실험군이 더 큰 설측경사도 변화가 관찰되었다. 4. 근원심 경사도 변화 측정에서 유견치는 상하악 모두 특별한 경향이 관찰되지 않았고 제2 유구치의 경우 하악에서 실험군이 더 큰 근심경사도 증가가 보였다. 제1대구치는 상악에서 실험군, 대조군 모두 원심 경사도가 증가되었다.

Keywords

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