Mechanical Properties and Cross-sectional Surface Evaluation of Dental Ceramic Abutment

치과용 세라믹 임플란트 지대주의 기계적 특성 및 절단면 평가

Abstract

The purpose of this study is to assess the mechanical properties of the ceramic abutment with washer. In this study, ceramic abutment were used, tested with $30^{\circ}$ compression load, shear fatigue, adaptation accuracy test(rotation angle, contact interval), removal torque force test, torsional breaking force test. The $30^{\circ}$ compression load was 729 N, the shear fatigue load was 275 N, adaptation accuracy test of rotation angle was within $3^{\circ}$, contact interval within $10{\mu}m$, and removal torque force test value is $18.88N{\cdot}cm$, torsional breaking force test value is $35.52N{\cdot}cm$. Ceramic abutment with a washer fitted have sufficient mechanical strength and may be substituted for titanium abutment.

Fig. 1 Screw with a ceramic abutment and washer

Fig. 2. Specimen before embedded

Fig. 3 Fatigue test set-up

Fig. 4. Stress-Strain curve diagram

Fig. 5. Load-cycle diagram

Fig. 6. After testing specimen

Fig. 7. Characteristics of rotation-prevention structure.

Fig. 8. Adaptation accuracy (A-Top view, B-Enlarge view, C & D-Margin Opening)

Fig. 9. Removal torque force test graph

Fig. 10. Torsional breaking force test graph

Table 1. Results of 30° compressive loads test

Table 2. Results of removal torque force test

Table 3. Results of torsional breaking force test