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단일, 이중 산처리 임플란트의 회전제거력 비교

Comparison of removal torque of dual-acid etched and single-acid etched implants in rabbit tibias

  • 김종진 (경북대학교 치과대학 치과보철학교실) ;
  • 조성암 (경북대학교 치과대학 치과보철학교실)
  • Kim, Jong-Jin (Department of Prosthodontics, School of Dentistry, Kyungpook National University) ;
  • Cho, Sung-Am (Department of Prosthodontics, School of Dentistry, Kyungpook National University)
  • 투고 : 2019.05.03
  • 심사 : 2019.08.12
  • 발행 : 2019.10.31

초록

목적:불산과 염산/ 황산을 두 번 사용하는 임플란트 표면처리 방식은 선반가공한 표면에 비하여 강한 결합력을 보이지만 두 번 산처리하는 방식은 티타늄의 피로도를 야기시켜 미소균열을 야기시킬 수 있으므로, 염산으로 한번 산처리하는 방식이 비슷한 결합력을 가진다면 단순하고 효율적인 산처리 방식이 될 수 있다. 재료 및 방법: 9개의 지름 3.75, 길이 4 mm의 두 번 처리 방식의 임플란트와 같은 크기의 한 번 처리 방식의 임플란트를 토끼의 경골에 심어서, 10일 후에 회전제거력, 거칠기, 젖음각도를 측정하였다. 결과: 두 번 처리 방식과 한 번 처리 방식의 회전제거력은 차이가 없었고 (P = .995). 두 번 처리군의 거칠기는 $0.93{\mu}m$, 한 번 처리는 $0.84{\mu}m$이었다 (P = .170). 평균젖음각은 두 번 처리는 $99^{\circ}$, 한 번 처리는 $98^{\circ}$ 이었다 (P = .829). 각 변수 모두 두 그룹의 차이는 없었다. 결론:산으로 한번 처리하거나 두 번 처리 하거나 두 그룹의 회전제거력, 거칠기, 평균젖음각의 차이는 없었기 때문에 종래의 dual acid treatment보다 한번 처리하여도 유용한 것으로 보여진다.

Purpose: Chemically strong-acids (HF and $HCl/H_2SO_4$) 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. Materials and methods: Nine $3.75{\times}4mm$ 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=.995). Mean surface roughness value were $0.93{\mu}m$ for HS group and $0.84{\mu}m$ for H group (P=.170). Root mean square roughness (RSq) values were $1.21{\mu}m$ for HS group and $1.08{\mu}m$ for H group (P=.294), and mean wetting angle values were $99^{\circ}$ for HS group and $98^{\circ}$ for H group (P=.829). Statistical analysis showed no significant difference between the removal torques, roughness, or wetting angles of the two groups. Conclusion: In this experiment, we found no significant difference in removal torque, roughness, or wetting angle between dual-acid etched and single-acid etched implants.

키워드

참고문헌

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