Comparison of the buccolingual inclination in alveolar bone and tooth using dental CBCT

Kim, Sung Eun; Kim, Jin Soo; Kim, Jae Duk

Abstract

PURPOSE: It is important to determine the bucco-lingual inclination of implants on radiographs before the implant surgery. The purpose of this study was to compare the buccolingual inclination in alveolar bone and the tooth with dental cone beam CT and to prepare the standard for the buccolingual inclination of implant.
MATERIALS AND METHODS
Axial, panoramic, and buccolingually sectioned images of 80 implant cases with stent including straight marker using CB Mercuray(TM) (Hitachi, Japan) were evaluated. The comparison of the buccolingual inclination of remained alveolar bone with the tooth and the marker on buccolingually sectioned views was performed statistically.
RESULTS
The average buccolingual inclination of remained alveolar bone and tooth was 82.8+/-4.6degrees and 85.8+/-4.7degrees (p<0.05, r=0.96) at the 1st molar area and 76.4+/-1.7degrees and 82.7+/-1.7degrees respectively (p>0.05, r=0.12) at the 2nd premolar area in upper jaw. The average buccolingual inclination of remained alveolar bone and tooth was 81.3+/-8.3degrees and 87.5+/-6.3degrees (p>0.05, r=0.85) at the lower 2nd premolar area and 94.3+/-6.6degrees and 93.3+/-7.2degrees respectively (p>0.05, r=0.91) at the 1st molar area in lower jaw. The inclinations of markers were very different from those of remained bone at the most of areas except the upper 2nd premolar area (r=0.79).
CONCLUSION
We recommend dental CBCT analysis for determining the buccolingual inclination of dental implant, because of significant difference, in average, between the buccolingual inclination of remained alveolar bone and tooth.