The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

EFFECT OF CHEMICAL TREATMENT ON THE BIOACTIVITY OF TITANIUM

화학적 처리가 티타늄의 생체활성도에 미치는 영향

  • Min Kwan-Sik (Department of Prosthodontics, School of Dentistry, Chonbuk National University) ;
  • Lee Min-Ho (Department of Dental Biomaterials, School of Dentistry, Chonbuk National University) ;
  • Ahn Seung-Geun (Department of Prosthodontics, School of Dentistry, Chonbuk National University) ;
  • Park Charn-Woon (Department of Prosthodontics, School of Dentistry, Chonbuk National University)
  • 민관식 (전북대학교 치과대학 치과보철학교실) ;
  • 이민호 (전북대학교 치과대학 치과생체학교실) ;
  • 안승근 (전북대학교 치과대학 치과보철학교실) ;
  • 박찬운 (전북대학교 치과대학 치과보철학교실)
  • Published : 2005.08.01
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Abstract

Statement of problem : Titanium is widely used as an implant material lot artificial teeth. Also, studies on surface treatment to form a fine passive film on the surface of commercial titanium or its alloys and improving bioactivity with bone have been carried out. However, there is insufficient data about the biocompatibility of the implant materials in the body. Purpose: The purpose of this study was to examine whether the precipitation of apatite on titanium metal is affected by surface modification. Materials and methods: Specimens chemically washed for 2 minute in a 1:1:1.5 (in vol%) mixture of 48% HF 60% $HNO_3$ and distilled water. Specimens were then chemically treated with a solution containing 97% $H_2SO_4$ and 30% $H_2O_2$ at $40^{\circ}C$S for 1 hour, and subsequently heat-treated at $400^{\circ}C$ for 1 hour. All specimens were immersed in the HBSS with pH 7.4 at $36.5^{\circ}C$ for 15 days, and the surface were examined with TF-XRD, SEM, EDX and XPS. Also, commercial purity Ti specimens with and without surface treatment were implanted in the abdominal connective tissue of mice for 4 weeks. Conventional aluminium and stainless steel 316L were also implanted for comparison. Results and conclusions : The results obtained were summarized as follows. 1. An amorphous titania gel layer was formed on the titanium surface after the titanium specimen was treated with a $H_2SO_4$ and $H_2O_2$ solution. The average roughness was $2.175{\mu}m$ after chemical surface treatment. 2. The amorphous titania was subsequently transformed into anatase by heat treatment at $400^{\circ}C$ for 1 hour. 3. The average thickness of the fibrous capsule surrounding the specimens implanted in the connective tissue was $46.98{\mu}m$ in chemically-treated Ti, and 52.20, 168.65 and $100.95{\mu}m$ respectively in commercial pure Ti, aluminum and stainless steel 316L without any treatment.

Keywords

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