Marginal and internal fit of all ceramic crown using the replica technique and the triple-scan protocol

Mi-Sun Shin; Jang-Hoon Lee

doi:10.4047/jkap.2017.55.4.372

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Shin and Lee: Marginal and internal fit of all ceramic crown using the replica technique and the triple-scan protocol

Original Article

The Journal of Korean Academy of Prosthodontics 2017; 55(4): 372-380.

Published online: 26 October 2017

DOI: https://doi.org/10.4047/jkap.2017.55.4.372

Marginal and internal fit of all ceramic crown using the replica technique and the triple-scan protocol

Mi-Sun Shin¹

, Jang-Hoon Lee²

¹Department of Convergence Technology, Graduate School of Venture, Hoseo University, Seoul, Republic of Korea.

²Division of Architecture, Civil and Environmental Engineering, Hoseo University, Asan, Republic of Korea.

Corresponding Author: Jang-Hoon Lee. Department of Environmental Engineering, Division of Architecture, Civil and Environmental Engineering, Hoseo University 79 Hoseo-ro, Baebang-eup, Asan-si, Chungcheongnam-do 31499, Republic of Korea. +82 (0)41 540 5144: jhlee@hoseo.edu

Received 12 June 2017 Revised 26 August 2017 Accepted 4 September 2017

The Korean Academy of Prosthodontics

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

This study was conducted to compare the marginal and internal fit of all ceramic crown using the replica technique and the triple-scan protocol.

Materials and methods

Twenty zirconia ceramic crowns were fabricated using titanium abutment model. All crowns were divided into two groups of 10 each, depending on the replica technique and the triple-scan protocol. The internal and marginal fit of 10 zirconia ceramic crowns were measured at 17 points for each specimen using the replica technique. The other 10 ceramic crowns were measured using the triple-scan protocol. Statistical analysis was performed by t-test (α= .05).

Results

The mean and standard deviation of marginal and internal fit were significantly different between the replica technique (49.86 ± 29.69 µm) and triple-scan protocol (75.35 ± 64.73 µm, P<.001). The mean and standard deviation of internal fit except marginal fit were 58.38 ± 31.77 µm and 64.00 ± 46.43 µm, respectively (P>.343).

Conclusion

There was a statistically significant difference in the marginal fit measured by the two methods. However, there was no statistically significant difference in the internal fit between the two methods.

Keywords: Replica technique, Triple-scan protocol, Marginal fitness, Internal fitness, All zirconia ceramics

Figures and Tables

Fig. 1

Master model with titanium block made by using CAD/CAM system (Juyoung Dental Lab, Seoul, Korea).

Fig. 2

Zirconia cr. made by using CAD/CAM system (S-plus, Seoul, Korea).

Fig. 3

The constant seating force (40 N) was maintained using a universal testing machine for 5 minutes.

Fig. 4

Scanned three dimensional surface data. (A) Titanium master die, (B) zirconia crown, (C) superimposed crown on the master die.

Fig. 5

Intersection of the replica preparation for microscopic measurement.

Fig. 6

Cross-section view of replica specimens. (A) Buccolingual section, ×50. AI: Axial internal gap. (B) AMD: Absolute marginal discrepancy, MG: Marginal gap. (C) Buccolingual section, ×50. OI: Occlusal internal gap.

Fig. 7

Measurement points for marginal gap (1, 2, 8, 9, a, b, g, h) and internal gap (3, 4, 5, 6, 7, c, d, e, f) (A) Buccolingual section, (B) Mesiodistal section.

Fig. 8

Mean of marginal gap according to replica and triple-scan methods (^* Significant at P < .05).

Fig. 9

Mean of internal gap according to replica and triple-scan methods (^* Significant at P < .05).

Fig. 10

Mean of marginal gap and internal gap (n = 170) according to replica and triple-scan methods.

Fig. 11

Mean of internal gap (n = 90) according to replica and triple-scan methods.

Table 1

Mean of marginal and internal gap according to replica and triple-scan methods (Unit: µm)

Table 2

Mean of marginal and internal gap according to replica and triple-scan methods (Unit: µm)

References

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ORCID iDs: Mi-Sun Shin
https://orcid.org/0000-0001-7961-7553
Similar articles

Marginal and internal fit of all ceramic crown using the replica technique and the triple-scan protocol

Abstract

Purpose

Materials and methods

Results

Conclusion

Figures and Tables

Fig. 1

Master model with titanium block made by using CAD/CAM system (Juyoung Dental Lab, Seoul, Korea).

Fig. 2

Zirconia cr. made by using CAD/CAM system (S-plus, Seoul, Korea).

Fig. 3

The constant seating force (40 N) was maintained using a universal testing machine for 5 minutes.

Fig. 4

Scanned three dimensional surface data. (A) Titanium master die, (B) zirconia crown, (C) superimposed crown on the master die.

Fig. 5

Intersection of the replica preparation for microscopic measurement.

Fig. 6

Cross-section view of replica specimens. (A) Buccolingual section, ×50. AI: Axial internal gap. (B) AMD: Absolute marginal discrepancy, MG: Marginal gap. (C) Buccolingual section, ×50. OI: Occlusal internal gap.

Fig. 7

Measurement points for marginal gap (1, 2, 8, 9, a, b, g, h) and internal gap (3, 4, 5, 6, 7, c, d, e, f) (A) Buccolingual section, (B) Mesiodistal section.

Fig. 8

Mean of marginal gap according to replica and triple-scan methods (* Significant at P < .05).

Fig. 9

Mean of internal gap according to replica and triple-scan methods (* Significant at P < .05).

Fig. 10

Mean of marginal gap and internal gap (n = 170) according to replica and triple-scan methods.

Fig. 11

Mean of internal gap (n = 90) according to replica and triple-scan methods.

Table 1

Mean of marginal and internal gap according to replica and triple-scan methods (Unit: µm)

Table 2

Mean of marginal and internal gap according to replica and triple-scan methods (Unit: µm)

References

Mean of marginal gap according to replica and triple-scan methods (^* Significant at P < .05).

Mean of internal gap according to replica and triple-scan methods (^* Significant at P < .05).