Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
권호 표지

Study of the relationship between the indication rod of stent on implant CT and the real path of implant fixture insertion considering residual ridge

임플란트 CT에서 방향 표시자의 방향과 잔존골을 고려한 임플란트 식립 방향의 관계에 관한 연구

  • Kim Do-Hoon (Dept. of Oral and Maxillofacial Radiology and Dental Research Institute, College of Dentistry, Seoul National University) ;
  • Heo Min-Suk (Dept. of Oral and Maxillofacial Radiology and Dental Research Institute, College of Dentistry, Seoul National University) ;
  • Lee Sam-Sun (Dept. of Oral and Maxillofacial Radiology, Dental Research Institute, and BK21, College of Dentistry, Seoul National University) ;
  • Oh Sung-Ook (Dept. of Oral and Maxillofacial Radiology and Dental Research Institute, College of Dentistry, Seoul National University) ;
  • Choi Hang-Moon (Dept. of Oral and Maxillofacial Radiology, Kangnung National University) ;
  • Jeon In-Seong (Dept. of Dentistry, Inje University Sanggyepaik Hospital) ;
  • Choi Soon-Chul (Dept. of Oral and Maxillofacial Radiology, Dental Research Institute, and BK21, College of Dentistry, Seoul National University)
  • 김도훈 (서울대학교 치과대학 구강악안면방사선학교실 및 치학연구소) ;
  • 허민석 (서울대학교 치과대학 구강악안면방사선학교실 및 치학연구소) ;
  • 이삼선 (서울대학교 치과대학 구강악안면방사선학교실, 치학연구소 및 BK21) ;
  • 오성욱 (서울대학교 치과대학 구강악안면방사선학교실 및 치학연구소) ;
  • 최항문 (강릉대학교 치과대학 구강악안면방사선학교실) ;
  • 전인성 (인제대학교부속 상계백병원 치과학교실) ;
  • 최순철 (서울대학교 치과대학 구강악안면방사선학교실, 치학연구소 및 BK21)
  • Published : 2003.06.01
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Abstract

Purpose : To assess the relationship between the direction of the indicating rod of the radiographic stent for ideal prosthetic design and the actual possible path of implant fixture placement when residual ridge resorption is considered. Materials and Methods: The study materials consisted of 326 implant sites (male 214 cases and female 112 cases) from a total of 106 patients (male 65 patients and female 41 patients) who desired implant prostheses. Computed tomography of patients were taken and reformatted using ToothPix/sup (R)/ software. Bony defects, bony sclerosis, the change of the direction of indicating rod, and root proximity of the adjacent teeth were examined on the CT-derived images. Results: The rate of the irregular crestal cortex was relatively high on premolar and molar area of maxilla. Mandibular molar area showed relatively high rate of focal sclerosis on the area of implant fixture insertion. The position of the indicating rods were relatively acceptable on the molar areas of both jaws. However, the position of the indicating rods should be shifted to buccal side with lingual rotation of the apical end on maxillary anterior teeth and premolar area. Conclusion: Clinically determined rod direction and position of the indicating rod for implant placement was not always acceptable for insertion according to the reformatted CT images. The pre-operative treatment plan for implant should be determined carefully, considering the state of the alveolar bone using the reformatted CT images.

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