Journal List > J Korean Acad Prosthodont > v.47(1) > 1034568

Han and Shin: Wettability of titanium implants depending upon surface properties

Abstract

Statement of problem

When an implant is fixed, a fixture comes into contact with a tissue fluid. Adhesion of a tissue fluid to a surface of implant is various case by case.

Purpose

The ultimate goal of this work is to analyze a correlation between a surface roughness and wettability of implant specimens. A measurement for wettability is performed considering 4 types of specimen implant with surface treatments different from each other to investigate the change of wettability with the elapse of time.

Material and methods

Firstly, 20 specimens of titanium were prepared. The specimen were made of a commercial Titanium Grade IV with the diameter of 10 mm and the thickness of 1 mm. According to the method of surface treatment, the specimens were classified into 4 groups of 5 specimens per group. Group A: Machined Surface Group B: Anodized surface Group C: RBM (HA blasting) surface Group D: CMP (calcium methaphosphate) coating surface. Surface roughness of specimen was measured using SV-3000S4 (Mituyoto, Japan). The measurement was based on the standard of JIS1994. Sessile drop method was used to measure the wettability, which measures contact angle between implant disc and saline with the time interval of 5, 10, and 15 seconds. SPSS 11.0 was used to analyze the collected data. In order to analyze the difference of wettability and surface roughness according to implant surface treatment method. The statistical significance was tested with the confidence level of 95%. Pearson's correlation coefficient was used to evaluate the correlation of surface roughness and wettability.

Results

The difference of surface roughness was statistically significant in the order of Group C (1.69 ± 0.26), Group D (1.58 ± 0.16), Group B (0.78 ± 0.14) Group A (0.18 ± 0.05). The wettability has also a statistically significant difference, which was in the order of group B (17.70 ± 2.66), Group C (27.86 ± 4.52), Group D (66.28 ± 3.70) Group A (70.52 ± 8.00). There was no difference in wettability with the passage of time.

Conclusions

1. The surface roughness was high in the order of RBM, CMP, Anodized, Machined group (P < .05). 2. The wettability was high in the order of Anodized, RBM, CMP, Machined group (P < .05). 3. There was no statistical significance in the correlation of surface roughness and wettability. (J Korean Acad Prosthodont 2009;47:12-20)

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Fig. 1.
Surface treated disc.
jkap-47-12f1.tif
Fig. 2.
Disc surface roughness measurement machine.
jkap-47-12f2.tif
Fig. 3.
SEM photographs of surface treated titanium. A (× 500), B (× 1,000)
jkap-47-12f3.tif
Fig. 4.
Photographs of surface wettability. A, after 1 second B, after 2 second C, after 3 second D, after 4 second
jkap-47-12f4.tif
Fig. 5.
Change of surface wettability by the time processing. 1: Machined surface 2: Anodized surface 3: RBM surface 4: CMP surface.
jkap-47-12f5.tif
Table I.
Classification of experimental implants
Groups Surfae type N
Group A Machined surface 5
Group B Anodized surface 5
Group C RBM surface 5
Group D CMP surface 5
Table II.
Distribution analysis for surface roughness by implant surface
Groups Mean SD F value P value Scheffe ´ PHT
Machined 0.18 0.05 273.47 0.000 Machined < Anodized < (CMP = RBM)
Anodized 0.78 0.14
RBM 1.69 0.26
CMP 1.58 0.16
Total 1.05 0.64      

P < .05

Table III.
Distribution analysis of wettability by implant surface treatment
Groups Mean SD F value P - value Scheffe ´PHT
Machined 70.52 8.00 135.59 0.000 Anodized < RBM < (CMP = Machined)
Anodized 17.70 2.66
RBM 27.86 4.52
CMP 66.28 3.70
Total 45.59 24.20

P < .05

Table IV.
Distribution analysis for wettability by the time
Time Mean SD F value P - value Scheffe ´PHT
5 sec 45.59 24.20 0.006 0.994 15sec = 10sec = 5sec
10 sec 45.01 24.30
15 sec 44.80 24.29
Total 45.13 23.85

P < .05

Table V.
Mean and SD of wettability by the time
Groups 5 sec 10 sec 15 sec
Machined 70.52 (8.00) 70.34 (7.83) 70.12 (7.68)
Anodized 17.70 (2.66) 16.70 (2.18) 16.42 (1.95)
RBM 27.86 (4.52) 27.60 (4.49) 27.46 (4.57)
CMP 66.28 (3.70) 65.40 (3.88) 65.20 (3.89)
Table VI.
Distribution analysis of wettability by the time
Source Sum of Squares df Mean Squares F value P value
Surface properties 32333.42 3 10777.81 423.494 0.000
Time 6.70 2 3.35 0.132 0.877
S.properties time 1.94 6 0.32 0.013 1.000
Corrected Total 1221.59 48      

P < .05

Table VII.
Corelationship wettability with surface roughness
Groups Wettability Mean Surface Roughness Mean Pearson r P value
Machined 70.49 0.18 -0.189 0.501
Anodized 17.65 0.78 -0.140 0.619
RBM 27.88 1.69 0.061 0.830
CMP 66.52 1.58 0.256 0.358
Total 45.64 1.05 -0.234 0.071

P < .1,

∗∗ P < .05

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