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Q U I N T E S S E N C E I N T E R N AT I O N A L

Influence of pulpotomy medicaments on the ultrastructure and shear bond strength of a self-etch adhesive to primary tooth dentin Hanaa Shalan, DDS1/Salwa Awad, DDS2/ Abeer Abd-El Sallam El-Fallal, DDS3

Objective: To compare the effect of the pulpotomy medicaments glutaraldehyde, ferric sulfate, and formocresol on the structure and shear bond strength of a self-etch adhesive to the dentin of primary teeth. Method and Materials: Forty human primary molars were sectioned mesiodistally and divided into four groups: group I (control group), dentin specimens were soaked in distilled water for 48 hours; group II, dentin specimens were soaked in 2% glutaraldehyde; group III, dentin specimens were soaked in formocresol; and group IV, dentin specimens were soaked in 15.5% ferric sulfate. All specimens were rinsed with tap water and dried with air. AdheSE One (a self-etch adhesive) and Valux Plus composite resin were applied to the dentin surfaces. The molecular structure PG UIF BEIFTJWF JUTFMG BOE BEIFTJWF XJUI DPNQPTJUF SFTJO XFSF UFTUFE VTJOH BO '5*3 spectrometer. Shear bond strength was tested with a universal testing machine. Failure modes analyses were performed with a scanning electron microscope (SEM). Results: Glutaraldehyde showed little changes in the molecular structure of the adhesive itself and adhesive with composite. However, ferric sulfate and formocresol affected the molecular structure of the adhesive alone and the adhesive with composite. The highest mean value of shear bond strength was for the glutaraldehyde group (11.17 ± 4.87 MPa). Ferric sulfate and formocresol significantly reduced shear bond strength after the application of pulpotomy medicaments (7.45 ± 3.73 and 5.31 ± 3.30 MPa, respectively). SEM analysis revealed that most of the specimens failed in cohesive and mixed modes. Conclusion: This study revealed that formocresol and ferric sulfate adversely affect the shear bond strength and molecular structure of the adhesive system to primary dentin. (Quintessence Int 2012;43:517–523)

Key words: bond strength, ferric sulfate, formocresol, glutaraldehyde, infrared, pulpotomy medicaments

In pediatric dentistry, pulpotomy is the

on the enamel of succedaneous teeth.3

most widely accepted clinical procedure

To avoid these harmful effects, alternative

for endodontically treating primary teeth.1

agents for vital pulpotomy procedures are

Formocresol has been widely used as a

being sought. Glutaraldehyde is consid-

pulpotomy agent in pediatric dentistry.2

ered a substitute for formocresol in primary

/VNFSPVT QSPCMFNT IBWF CFFO JEFOUJ-

teeth because of its better tissue fixative

fied with the application of formocresol,

properties and superior crosslinking abili-

including postoperative systemic transport

ties.4 Two percent buffered glutaraldehyde

of the medicament and possible effects

was an effective agent and showed high success rates in the pulpotomy of pri-

1

2

3

Lecturer,

Department

of

Pediatric

Dentistry,

Mansoura

mary teeth.5 Ferric sulfate has received

University, Mansoura, Egypt.

some attention as a pulpotomy agent.6–8

Associate Professor, Department of Pediatric Dentistry,

It has demonstrated good clinical and

Mansoura University, Mansoura, Egypt.

radiographic success in human clinical

Associate Professor, Department of Dental Materials, Mansoura

trials.9 A clinical study compared the effec-

University, Mansoura, Egypt.

tiveness of ferric sulfate to formocresol and

Correspondence: Dr Abeer Abd-El Sallam El-Fallal, Department of Dental Materials, Faculty of Dentistry, Mansoura University, Gomhouria St, Mansoura 35516, Egypt. Email: elfallal3@ yahoo.com, elfallal3@mans.edu.eg

VOLUME 43 t /6.#&3 6 t +6/& 2012

showed that the success rates were 85% and 86% for formocresol and ferric sulfate, respectively.10

517


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