Lee,  Seong-Jae; Kim,  Ui-Seong; Kim,  Gi-Deok; Lee,  Seung-Jong

J Korean Dent Assoc > Volume 44(2); 2006 > Article

The Journal of The Korean Dental Association 2006;44(2):115-122.
Published online February 28, 2006.

자가 치아 이식술에 사용되는 Computer Aided Rapid Prototyping model(CARP model)의 실제 치아에 대한 오차

이성재¹, 김의성², 김기덕³, 이승종⁴

^¹일산예치과ㆍ연세대학교 치과대학 치과보존학교실
^²연세대학교 치과대학 치과보존학교실
^³연세대학교 치가대학 구강악안면방사선학교실
^⁴연세대학교 치과대학 치과보존학교실

Seong-Jae Lee¹, Ui-Seong Kim², Gi-Deok Kim³, Seung-Jong Lee⁴

Abstract

Objective
: The purpose of this study was to evaluate the dimensional errors between real tooth, 3D CT image and CARP model. Materials and Methods : Two maxilla and two mandible block bones with intact teeth were taken from two cadavers. Computed tomography was taken either in dry state and in wet state. After then, all teeth were extracted and the dimensions of the real teeth were measured using a digital caliper at mesio-distal and bucco-lingual width both in crown and cervical portion. 3D CT image was generated using the V-works 4.0TM (Cybemed Inc., Seoul, Korea) software. Twelve teeth were randomly selected for CARP model fabrication. All the measurements of 3D Ct images and CARP models were made in the same manner of the real tooth group. Dimensional errors between real tooth, 3D CT image model and CARP model was calculated. Results : 1) Average of absolute error was 0.199 mm between real teeth and 3D CT image model, 0.169 mm between 3D CT image model and CARP model and 0.291 mm between real teeth and CARP model, respectively. 2) Average size of 3D CT image was smaller than real teeth by 0.149 mm and that of CARP model was smalier than 3D CT image model by 0.067mm. Conclusion : Within the scope of this study, CARP model with the 0.291 mm average of absolute eror can aid to enhance the success rate cf autogenous tooth transplantation due to the increased accuracy of recipient bone and donor tooth.

Key Words: Absolute error;Autotransplantation;Donor tooth;Rapid prototyping;Recipient bone site preparation;