Journal of Peking University (Health Sciences) ›› 2020, Vol. 52 ›› Issue (6): 1112-1116. doi: 10.19723/j.issn.1671-167X.2020.06.021

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Effect of disinfectant with benzethon chloramine and isopropanol as main active ingredients on the accuracy of dental impression

Di XU,Dong-hao WEI,Ya-chi ZHANG,Ping DI(),Ye LIN   

  1. Department of Oral Implatology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
  • Received:2020-02-12 Online:2020-12-18 Published:2020-12-13
  • Contact: Ping DI E-mail:diping@bjmu.edu.cn
  • Supported by:
    Capital Health Research and Development Special Project(2018-2-4102)

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Abstract:

Objective: To assess the effect of disinfectant (Cavicide) with benzethon chloramine and isopropanol as main active ingredients disinfectant on dental impression accuracy. Methods: The effect of Cavicide on three impression materials (alginate, polyether and vinylpolysiloxane) were assessed using a standard model. The standard model was digitized by an extraoral scanner (IScan D103i, Imetric). For each kind of impression materials, thirty impressions were taken following the manufactures’ instruction in the same conditions. Subsequently, the impressions were randomly divided into three groups, with ten impressions in each group. After the impression taking was completed, the three groups underwent pure water rinse for 1 min (blank control, BC), 2% glutaraldehyde solution immersion disinfection for 30 min (glutaraldehyde, GD), and Cavicide solution spray disinfection for 5 min (Cavicide, CC), respectively. All the impressions were digitized by the extraoral scanner (IScan D103i, Imetric) after disinfection and exported to a dedicated three-dimensional analysis software (Geomagic Qualify 2014, Geomagic, USA). In the software, the digital models of the impressions were trimmed to teeth and then superimposed with the digitized standard model via best-fit alignment. Root mean square (RMS) was used to evaluate the deviations between the impression and the standard model. The deviation in the anterior and posterior regions was evaluated respectively. One-way ANOVA test and the LSD post-hoc test were used to compare the deviations between the three groups (P <0.05). The color map of each superimposition was saved for visual analysis. Results: For the polyether and vinylpolysiloxane materials, the difference between the three groups was not statistically significant (P=0.933, P=0.827). For the alginate material, the difference in posterior region between group GD and group BC, as well as group GD and group CC were statistically significant (GD vs. BC, P=0.001; GD vs. CC, P=0.002), while the difference between group BC and group CC was not statistically significant (P=0.854). The visual analysis showed an obvious deviation in the buccal-lingual direction in group GD. Conclusion: Disinfectant (Cavicide) with benzethon chloramine and isopropanol as main active ingredients using spray disinfection has no effect on the accuracy of the alginate, polyether and vinylpolysiloxane impressions.

Key words: Dental impression, Disinfection, Accuracy, Three-dimensional

CLC Number: 

  • R783

Figure 1

Standard model (master model) (A) from occlusal view (B) from labial view"

Figure 2

Digitization of the standard model"

Table 1

RMS of the anterior region between impression and master model (x-±s)/μm"

Group BC GD CC P value
VSE 21.6±4.9 20.4±6.9 24.1±3.7 0.220
POE 28.7±10.3 31.2±9.4 30.9±11.4 0.740
ALG 40.5±21.6 47.9±23.0 42.4±25.1 0.703

Table 2

RMS of the posterior region between impression and master model(x-±s)/μm"

Group BC GD CC P value
VSE 27.1±6.7 29.2±10.0 26.4±7.7 0.733
POE 43.0±20.9 40.2±24.2 45.4±19.4 0.827
ALG 43.3±23.2 60.9±20.4 47.2±21.4 0.037

Figure 3

Typical deviation pattern (incisal view) of the anterior region between standard model and impressions in all groups BC, blank control; GD, glutaraldehyde; CC, Cavicide; VSE, vinylpolysiloxane; POE, polyether; ALG, alginate. The deviation range is color coded from -120 (blue) μm to +120 (red) μm. Green surface shows area with minor deviation (-30 μm to +30 μm). VSE,vinylpolysiloxane; POE,polyether; ALG,alginate."

Figure 4

Typical deviation pattern (occlusal view) of the posterior region between standard model and impressions in all groups BC, blank control; GD, glutaraldehyde; CC, Cavicide; VSE, vinylpolysiloxane; POE, polyether; ALG, alginate. The deviation range is color coded from -120 (blue) μm to +120 (red) μm. Green surface shows area with minor deviation (-30 μm to +30 μm)."

Figure 5

Typical deviation pattern (buccal view) of the posterior region between standard model and impressions in all groups when taking alginate impressions BC, blank control; GD, glutaraldehyde; CC, Cavicide. The deviation range is color coded from -120 (blue) μm to +120 (red) μm. Green surface shows area with minor deviation (-30 μm to +30 μm). In group GD, larger deviation was observed on buccal surface, while minor deviation was observed on this area in group BC and CC."

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