Journal Presentation

2 조 15 번

김안석

Sealant

• Dent Res J (Isfahan). 2013 Sep-Oct; 10(5): 643–646. • PMCID: PMC3858740• Microleakage assessment of fissure sealant following fissurotomy bur or pumice prophylaxis use before etching• Ali Bagherian,1 Majid Akbari,2 Mohsen Rezaeian,3 and Ghassem Ansari4

• 1Department of Pediatric Dentistry, Dental School, Rafsanjan University of Medical Sciences, Rafsanjan, Iran

• 2Department of Restorative Dentistry, Dental School, Mashhad University of Medical Sciences, Mashhad, Iran

• 3Department of Social Medicine, Medical School, Rafsanjan University of Medical Sciences, Rafsanjan, Iran

• 4Department of Pediatric Dentistry, Dental School, Shahid Beheshti Medical University, Evin, Tehran, Iran

Background

####- A prolonged life of fissure to prevent invulnerable newly erupted teeth - The use of preparatory techniques bur introduction 1) fissuratomy bur 2) pumice prophylaxis to reduce microleakage

Microleakage

Any sign of microleakage….

-Considered the weak point -Failure to isolate pit and fissures-providing the retention of bacteria, nutri-

ents, and their acidic metabolic products

##eventually leading to Sealant failure!!##

• Group A

• Group B

Materials and Methods 90 freshly extracted healthy human maxillary premolar teeth randomly divided into 3 groups (each for 30 teeth)

Group A a fissuratomy bur on a high speed reduction on all the occlusal fissures

Group B 20 seconds thorough prophylaxis pumice on a low speed reduction on all the occlusal surfaces

Group C no preparation

Continued …. 1) Teeth etched for 20s with phosphoric acid gel and then washed and dried for 20s2) Teeth received an adhesive3) LED light cured4) Sealant applied to all to the prepared fissures through a syringe tip5) Thermocycled with 1,000cycles between 5~55C for 20s6) Covered with two layers of nail varnish and then with a layer of sticky wax7) immersed in a 3% basic fuchsin dye solution for 72 h.8) washed under the tap water for 1 min to remove excess dye 9) embedded in acrylic blocks and sectioned in the bucco- lingual plane through the sealant for two identical sections using a water-cooled diamond disk on an Isomet saw

result

- Examined under a stereomicroscope dye penetration score # 0 - no dye penetration # 1 - dye penetration to the outer half of the

enamel-sealant interface # 2 - dye penetration in the inner half of the

enamel-sealant interface # 3 - dye penetration into the underlying fissure **Kruskall-Wallis Analysis of Variance and Mann

- Whitney U-tests

Fissuratomy bur – 80%

Prophylaxis pumice – 79.2%

No preparation (conventional) – 66.7%

Conclusion

- Findings of this study indicate that the use of fissurotomy bur along with

etchant gel enhances adhesiveness of sealant to the tooth

- The use of prophylaxis paste would be advantageous in microleakage reduction

to the use of etching alone