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The prediction in computer color matching of dentistry based on GA+BP neural network.

Li H, Lai L, Chen L, Lu C, Cai Q - Comput Math Methods Med (2015)

Bottom Line: Although the use of computer color matching can reduce the influence of subjective factors by technicians, matching the color of a natural tooth with a ceramic restoration is still one of the most challenging topics in esthetic prosthodontics.To our knowledge, we firstly combine the BPNN with GA in computer color matching in dentistry.Extensive experiments demonstrate that the proposed method improves the precision and prediction robustness of the color matching in restorative dentistry.

View Article: PubMed Central - PubMed

Affiliation: School of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100048, China.

ABSTRACT
Although the use of computer color matching can reduce the influence of subjective factors by technicians, matching the color of a natural tooth with a ceramic restoration is still one of the most challenging topics in esthetic prosthodontics. Back propagation neural network (BPNN) has already been introduced into the computer color matching in dentistry, but it has disadvantages such as unstable and low accuracy. In our study, we adopt genetic algorithm (GA) to optimize the initial weights and threshold values in BPNN for improving the matching precision. To our knowledge, we firstly combine the BPNN with GA in computer color matching in dentistry. Extensive experiments demonstrate that the proposed method improves the precision and prediction robustness of the color matching in restorative dentistry.

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Related in: MedlinePlus

Measure of the shade of the specimen with crystaleye.
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fig4: Measure of the shade of the specimen with crystaleye.

Mentions: We mixed VITA VMK95 dentin porcelain powder according to different proportion. The powder will be molding in homemade stainless steel mold (the diameter is 15 mm; the thickness is 3 mm). Then, we put the porcelain powder into porcelain pieces in porcelain furnace and manufacture porcelain pieces of specimen. Finally, the color of porcelain restoration database is generated by measuring the shade of the specimen with crystaleye dental spectrophotometer [19], as shown in Figure 4.


The prediction in computer color matching of dentistry based on GA+BP neural network.

Li H, Lai L, Chen L, Lu C, Cai Q - Comput Math Methods Med (2015)

Measure of the shade of the specimen with crystaleye.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385598&req=5

fig4: Measure of the shade of the specimen with crystaleye.
Mentions: We mixed VITA VMK95 dentin porcelain powder according to different proportion. The powder will be molding in homemade stainless steel mold (the diameter is 15 mm; the thickness is 3 mm). Then, we put the porcelain powder into porcelain pieces in porcelain furnace and manufacture porcelain pieces of specimen. Finally, the color of porcelain restoration database is generated by measuring the shade of the specimen with crystaleye dental spectrophotometer [19], as shown in Figure 4.

Bottom Line: Although the use of computer color matching can reduce the influence of subjective factors by technicians, matching the color of a natural tooth with a ceramic restoration is still one of the most challenging topics in esthetic prosthodontics.To our knowledge, we firstly combine the BPNN with GA in computer color matching in dentistry.Extensive experiments demonstrate that the proposed method improves the precision and prediction robustness of the color matching in restorative dentistry.

View Article: PubMed Central - PubMed

Affiliation: School of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100048, China.

ABSTRACT
Although the use of computer color matching can reduce the influence of subjective factors by technicians, matching the color of a natural tooth with a ceramic restoration is still one of the most challenging topics in esthetic prosthodontics. Back propagation neural network (BPNN) has already been introduced into the computer color matching in dentistry, but it has disadvantages such as unstable and low accuracy. In our study, we adopt genetic algorithm (GA) to optimize the initial weights and threshold values in BPNN for improving the matching precision. To our knowledge, we firstly combine the BPNN with GA in computer color matching in dentistry. Extensive experiments demonstrate that the proposed method improves the precision and prediction robustness of the color matching in restorative dentistry.

Show MeSH
Related in: MedlinePlus