Comparison of removal torque of dual-acid etched and single-acid etched implants in rabbit tibias = 단일, 이중 산처리 임플란트의 회전제거력 비교

다국어 초록 (Multilingual Abstract)

Purpose. Chemically strong-acids (HF and HCl/H2SO4) dual etching implant surfaces have higher strengths of osseointegration than machined implant surfaces. However, the dual acid treatment deteriorates the physical properties of the titanium by weakening the fatigue resistance of the implant and causing microcracks. The removal torque comparison between the dual-acid etched (hydrochloric acid, sulfuric acid, HS) and single-acid etched implants (hydrochloric acid, H) could reveal the efficiency of implant surface acid treatment.
Material and methods. Nine 3.75 × 4 mm dual-acid etched SLA implants and nine single-acid etched SLA implants were inserted into New Zealand rabbit tibias. After 10 days, removal torque, roughness, and wetting angle were measured.
Results. Mean removal torque values were as follows: Mean removal torque were 9.94 Ncm for HS group and 9.96 Ncm for H group (P=0.995). Mean surface roughness value were 0.93 um for HS group and 0.84 um for H group (P=0.170). Root mean square roughness (RSq) values were 1.21 um for HS group and 1.08 um for H group (P=0.294), and mean wetting angle values were 99° for HS group and 98° for H group (P=0.829). Statistical analysis showed no significant difference between the removal torques, roughness, or wetting angles of the two groups.
Conclusions. In this experiment, we found no significant difference in removal torque, roughness, or wetting angle between dual-acid etched and single-acid etched implants.

KEYWORDS: osseointegration, biocompatibility, surface treatment, biomechanical evaluation

목차 (Table of Contents)

• I. Introduction 1
• II. Materials and Methods 4
• III. Results 6
• IV. Discussion 9
• V. Conclusions 14
• VI. References 15
• VII. Abstract 21