Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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The Effect of Abutment Inclined Angle on the Marginal Fit of Zirconia All-ceramic Crown

지대주 경사각이 지르코니아 전부도재관의 변연적합도에 미치는 영향

  • Lee, Seo-Yeon (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan) ;
  • Chung, In-Sung (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan) ;
  • Jeon, Byung-Wook (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan)
  • 이서연 (부산가톨릭대학교 보건과학대학 치기공학과) ;
  • 정인성 (부산가톨릭대학교 보건과학대학 치기공학과) ;
  • 전병욱 (부산가톨릭대학교 보건과학대학 치기공학과)
  • Received : 2016.05.01
  • Accepted : 2016.09.09
  • Published : 2016.09.30
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Abstract

Purpose: The present study was performed to investigate the effect of abutment inclined angle on the marginal fit of zirconia all-ceramic crown. Methods: The Ti abutments with 3 different inclined angle($2^{\circ}$, $4^{\circ}$ and $6^{\circ}$) were fabricated. The zirconia copings were fabricated for each abutment by using dental CAD/CAM system. The manufactured zirconia copings were duplicated through silicone replica technique, and a replicated specimen was sectioned in the center of bucco-lingual and mesio-distal axial to measure the marginal fit by using a stereo microscope. The results were analyzed using a one-way ANOVA with SPSS 22.0 for Windows(${\alpha}=0.05$). Results: On the bucco-lingual axial, marginal fit was the RL3($41.5{\pm}3.4{\mu}m$), RL2($44.3{\pm}4.3{\mu}m$) and RL1($47.5{\pm}5.7{\mu}m$), respectively. On the mesio-distal axial, marginal fit was the RL3($41.1{\pm}3.7{\mu}m$), RL2($45.7{\pm}5.3{\mu}m$) and RL1($46.2{\pm}4.5{\mu}m$), respectively. One-way ANOVA showed statistically significant difference between groups for marginal fit(p<0.05). Conclusion: For marginal fit of the abutments inclined angle, RL3 specimen was superior. The abutment inclined angle had influence on marginal fit of the zirconia copings. The marginal fit of each group were within clinically acceptable range.

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References

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