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Int Poster J Dent Oral Med 11 (2009), No. 4     15. Dec. 2009

Int Poster J Dent Oral Med 2009, Vol 11 No 4, Poster 470

SEM study on dentin/resin interface in primary teeth

Language: English
 

Authors:
Dr. Emaan Yoonis, Prof. Dr. Martina Kukletová,
Masaryk University, Medical Faculty, Stomatological Clinic, Brno, Czech Republic
Ing. Aleš Matoušek,
University of Technology, Institute of Materials Science and Engineering, Brno, Czech Republic

Date/Event/Venue:
March 10-12th, 2009
UAE International Dental Conference & Arab Dental Exhibition AEEDC
Dubai

Poster Award
AEEDC Dubai 2009 Poster Award, 2nd Price

Introduction

The aim of the present paper was to study the character of connection between dentine adhesives and dentine in primary teeth, and to compare the structural pattern of selected adhesions in total etch technique and self-etching technique.
 

Objectives

Dentin hybridization in primary teeth.
 

Material and Methods

Dentinal adhesives Excite, Prime bond, Single bond, Xeno III, AdheSe and Prompt-L-pop Adper were used. The former three belong to the total etch technique, the latter three to the self-etching technique. Thirty extracted intact primary teeth were used for the study, each adhesive was applied into 5 teeth and the class I cavity was filled with EvoCeram. Struers Accutom 50 was used to halve the teeth previously embedded into epoxy resin using Epovac, and the obtained samples were embedded into methacrylate resin. The cut surfaces were polished with the Struers Tegra system. The polished surfaces were etched for 20 seconds with 37% phosphoric acid and for 5 minutes in 5% sodium hypochlorite to remove the debris.The samples were photographed in Tescan Vega TS 5136 XM scanning electron microscope.
 

Results

Total-etch technique
The acid-etched dentine surface was covered continuously by dentine adhesives Excite, Prime bond and Single bond.
Dentinal adhesives penetrated into dentinal tubules in the form of tags and formed the hybrid layer in the demineralized surface dentine. The resin tags obturated totally dentinal tubules and sent very fine processes into anastomosing tubules.

Self-etching technique
Self-etching adhesives Xeno III, AdheSe and Prompt-L-Pop Adper formed the hybrid layer and penetrated into dentinal tubules obturing them in the same way as the adhesives of total etched technique, however, best results were obtained after AdheSe and Xeno III application. Co-polymerization of dentinal adhesives with the composite resin material was found to be good and without voids.

Fig. 1a: Excite. Enamel. Tags of dentinal adhesives in the etched enamel Fig. 1b: Excite. Dentine. Dentinal adhesives forms the hybrid layer and penetrates into dentinal tubules. (2-4004) Fig. 1c: Excite. Dentine. Hybrid layer along the cavity wall, penetration of adhesives into dentinal tubules (1-4004)
Fig. 2a: Prime bond. Enamel. Tags of dentinal adhesives in the etched enamel Fig. 2b: Prime bond. Dentine. Dentinal adhesives forms the hybrid layer and penetrates into dentinal tubules. (2-2002) Fig. 2c: Prime bond. Dentine. Hybrid layer along the cavity wall, penetration of adhesives into dentinal tubules (1-2004)
Fig. 3a: Single bond. Enamel. Tags of dentinal adhesives in the etched enamel Fig. 3b: Single bond. Dentine. Dentinal adhesives forms the hybrid layer and penetrates into dentinal tubules Fig. 3c: Single bond. Dentine. Higher magnification of the previous picture
Fig. 4a: Xeno III. Enamel. Tags of dentinal adhesives in the etched enamel Fig. 4b: Xeno III. Dentine. Dentinal adhesives forms the hybrid layer and penetrates into dentinal tubules Fig. 4c: Xeno III. Dentine. Higher magnification of the previous picture
Fig. 5a: AdheSe. Enamel. Tags of dentinal adhesives in the etched enamel Fig. 5b: AdheSe. Dentine. Hybrid layer along the cavity wall, penetration of adhesives into dentinal tubules (1-4005) Fig. 5c: AdheSe. Dentine. Higher magnification of the hybrid layer. (1-4005)
Fig. 6a: Prompt-L-pop. Enamel. Tags of dentinal adhesives in the etched enamel Fig. 6b: Prompt-L-pop. Dentine. Hybrid layer along the cavity wall, penetration of adhesives into dentinal tubules (1-4003)
 
Fig. 6c: Prompt-L-pop. Dentine. Higher magnification of the hybrid layer. (1-2003)
 

Conclusions

There was no substantial difference in morphology of the dentine/resin interface between the adhesives studied. The findings have suggested that the hybrid layer function of all adhesives studied might be of the same quality. This fact that there is no substantial morphological difference in the dentine hybridization between total-etch and self-etching adhesives may be of importance in the restoration of primary teeth because the number of steps and the procedure duration can be significantly reduced.
 

Acknowledgements

The study was supported by the Project 1M0528 from the Czech Ministry of Education and by Czech Science Foundation project No. 106/09/H35.
 

Literature

  1. Gjorgievska E., John W: Marginal adaptation and performance of bioactive dental restorative materials in deciduous and young permanent teeth. J Appl Oral Sci. 2008, 16, pp.1-6.
  2. Kramer N., Lohbauer U., Frankenberger R: Restorative materials in the primary dentition of poli-caries patients. Eur Arch Paediatr Dent. 2007, 8, pp. 29-35.
  3. Kukletová M., Halacková Z., Horký D., Matoušek A.,Gojišová E., Cihlár; J: Comparsion of Dentine-Resin Interface in Total-Etch and Self-Etching Adhesives Using Electron Microscopy. Prague Medical Report 2008, 108, pp. 358-367.
  4. Rood H., Wray A., eds. Treatment planning for the developing dentition, London: Quintessence, 2006, pp. 80-84.
  5. Socini JA., Maserejian NN., Trachtenberg F., Tavares M., Hayes C: The longevity of amalgam versus compomer /composite restorations in posterior primary and permanent teeth. J Am Dent Assoc 2007, 138, pp. 763-772.
  6. Šváchová A.: Contemporary possibilities of dental caries treatment in primary dentition. Dissertation, Charles University Plzen, (in Czech, abstract in English) 2006, pp.112-113.
     

Abbreviations

SEM = Scanning Electron Microscopy
E = enamel
D = dentine
C = dentine tubule
T = tag
H = hybride layer
A = dentinal adhesives
F = composite filling
 

This Poster was submitted by MUDr. Emaan Yoonis.
 

Correspondence address:
Dr. Emaan Yoonis
Masaryk University
Medical Faculty, Stomatological Clinic
Pekarska 53
656 91 Brno
Czech Republic