FİBER İLE GÜÇLENDİRME KOMPOZİT REZİNLERİN EĞİLME DİRENCİNE ETKİ EDER Mİ?

Yıl 2016, Cilt: 26 Sayı: 3, 473 - 477, 01.12.2016

Güliz Aktaş , Emine Göncü Başaran M. Barış Güncü Pekka K. Vallıttu Lippo V.J. Lassıla

https://doi.org/10.17567/ataunidfd.290303

Öz

Amaç: Kompozit rezinler uzun yıllardır hem
restoratif dolgu maddesi olarak hem de 
adeziv restorasyonlarda diş eksikliklerinin giderilmesinde
kullanılmaktadır. Artan okluzal yükler karşısında  kompozit rezinlerin fiber ile güçlendirilmesi
materyalin dayanıklılığını artırmak amacı ile kullanılan bir yöntemdir. Bu invitro çalışmanın amacı fiber ile
güçlendirmenin kompozit rezinlerde eğilme direncine olan etkisinin
araştırılmasıdır.

Gereç ve Yöntem: Farklı fiber
dağılımına ve rezin oranına sahip 
kompozit bloklar (GR 1, GR 2, GR 3,) ve bir deneysel kompozit (GR 4)
laboratuvar ortamında hazırlandı. Fiber ile güçlendirilmiş bloklar ve piyasada
yer alan hazır kompozit blok (GR 5) kesme cihazı ile ebadı 2x2x25 mm olacak
şekilde 5 gruba (n:18) ayrıldı. Örneklere 24 saat 37 C de distile suda
bekletildikten sonra Universal test cihazında  
1mm/dk hızla  eğilme testi
uygulandı. Sonuçlar  tek yönlü varyans
analizi (ANOVA) ile değerlendirildi. 

Bulgular: Tüm gruplar arasında
istatiksel olarak anlamlı farklılık gözlenmiştir (p<0.001). Ortalama eğilme
direnci değerleri ve standart sapmaları GR 1, GR 2, GR 3, GR 4 ve GR 5’de
sırasıyla 130±6, 125±5.1, 136±6.8, 115±4 ve 85±2.9 bulundu.  Gr 3 en yüksek değeri gösterirken, Gr 5 en
düşük değeri göstermiştir (p<0.001).

Sonuç: Bu invitro çalışmada kompozit rezinlerin cam fiber ile güçlendirilmesi
eğilme direncini artırmaktadır.

Anahtar kelimeler: Kompozit rezin, fiber, eğilme direnc

DOES FIBER REINFORCEMENT
EFFECT ON FLEXURAL STRENGTH OF COMPOSITE RESINS?ABSTRACT

 

Aim: Composite resins have
been used for many years both as a restorative material and adhesive
restorations on the loss of tooth structure. Fiber reinforcement is the most
commonly used method for increasing the strength of the composite materials
under increased occlusal forces. The aim of this in vitro study was to
investigate the effect of fiber reinforcement of composite resins for their
flexural strength.

Material
and Methods:  Composite blocks (GR 1, GR 2, GR 3,) which
have different fiber configurations/ resin ratio and experimental composite (GR
4) were prepared in laboratory condition. Fiber reinforced composite blocks and
commercial available composite blocks (GR 5) were cut into small specimens
(2x2x 25mm) into 5 subgroups (n:18). The specimens were stored in distilled
water at 370 C
for 24 hour, and then flexural strength tests were performed with using
Universal Testing Machine. Data were analyzed using one-way ANOVA.

Results: Significant differences
were found among the flexural strength of the tested groups (p<0.001).  The mean flexural strength values of the GR
1, GR 2, GR 3, GR 4 and GR 5 were 130±6, 125±5.1, 136±6.8, 115±4 and 85±2.9
respectively.  GR 3 exhibited the highest
flexural strength values in comparison to the other groups (p<0.001). While
control group (Gr 5) exhibited the lowest.

Conclusion:
It
is concluded that glass fiber reinforcement improves the flexural strength of
composite resins.

Key words: Composite resin, fiber, flexural strength

Anahtar Kelimeler

Kompozit rezin, fiber

Kaynakça

• Gaengler P, Hoyer I, Montag R, Gaebler P. Micromorphological evaluation of posterior composite restorations - a 10-year report. J Oral Rehabil 2004;31:991-1000.
• 2. Kohler B, Rasmusson CG, Odman P. A five-year clinical evaluation of Class II composite resin restorations. J Dent 2000;28:111-6.
• 3. Sarrett DC. Clinical challenges and the relevance of materials testing for posterior composite restorations. Dent Mater 2005;21:9-20.
• 4. Vallittu PK, Narva K. Impact strength of a modified continuous glass fiber - Poly(methyl methacrylate). Int J Prosthodont 1997;10:142-8.
• 5. Kangasniemi I, Vallittu P, Meiers J, Dyer SR, Rosentritt M. Consensus statement on fiber-reinforced polymers: Current status, future directions, and how they can be used to enhance dental care. Int J Prosthodont 2003;16:209-9.
• 6. Kim SH, Watts DC. Effect of glass-fiber reinforcement and water storage on fracture toughness (K-JC) of polymer-based provisional crown and FPD materials. Int J Prosthodont 2004;17:318-22.
• 7. Vallittu PK. Flexural properties of acrylic resin polymers reinforced with unidirectional and woven glass fibers. J Prosthet Dent 1999; 81: 318-26.
• 8. Vallittu PK. Survival rates of resin-bonded, glass fiber-reinforced composite fixed partial dentures with a mean follow-up of 42 months: A pilot study. J Prosthet Dent 2004;91:241-6.
• 9. Stipho HD. Repair of acrylic resin denture base reinforced with glass fiber. J Prosthet Dent 1998;80:546-50.
• 10. Dyer SR, Lassila LVJ, Jokinen M, Vallittu PK. Effect of fiber position and orientation on fracture load of fiber-reinforced composite. Dent Mater 2004;20:947-55
• Candan U, Eronat E, Turkun M. Fiberle güçlendirmenin nanofil kompozitin eğme direncine etkisinin incelenmesi. Atatürk Üniv Diş Hek Fak Derg 2015;25:13-20.
• 21. Venhoven BAM, deGee AJ, Werner A, Davidson CL. Influence of filler parameters on the mechanical coherence of dental restorative resin composites. Biomaterials 1996;17:735-40.
• 22. Ellakwa AE, Shortall AC, Shehata MK, Marquis PM. The influence of fibre placement and position on the efficiency of reinforcement of fibre reinforced composite bridgework. J Oral Rehabil 2001;28:785-91.
• 23. Altieri JV, Burstone CJ, Goldberg AJ, Patel AP. Longitudinal Clinical-Evaluation of Fiber-Reinforced Composite Fixed Partial Dentures - a Pilot-Study. J Prosthet Dent 1994;71:16-22.
• 24. Vallittu P. Glass fiber reinforcement in repaired acrylic resin removable dentures: preliminary results of a clinical study. Quintessence Int 1997;28:39-44.
• 25. Basaran EG, Ayna E, Vallittu PK, Lassila LVJ. Load Bearing Capacity of Fiber-Reinforced and Unreinforced Composite Resin Cad/Cam-Fabricated Fixed Dental Prostheses. J Prosthet Dent 2013;109:88-94.
• 26. Keulemans F, Lassila LVJ, Garoushi S, et al. The influence of framework design on the load-bearing capacity of laboratory-made inlay-retained fibre-reinforced composite fixed dental prostheses. J Biomech 2009;42:844-9.
• 27. Jones M, Bayne SC, Thompson JY. Effects of branched-fiber pillar additions on dental composite mechanical properties. J Dent Res 1997;76:76.