Article thumbnail

Efficacy of Composite Restorative Techniques in Marginal Sealing of Extended Class V Cavities

By Salwa Khier and Khamis Hassan


Objectives. To compare the efficacy of three placement techniques in marginal sealing of Class V composite restorations extending onto the root. Materials and Methods. Class V cavities were prepared on buccal surfaces of 30 extracted human molars, with gingival margins 1.5 mm on the root. Prepared teeth were randomly assigned into 3 groups of 10 each and restored with Single Bond/Filtek Supreme using following techniques; Group I: oblique; Group II: occlusogingival; and Group III: split-increment. After restoration finishing, teeth were thermocycled, and immersed in 2% methylene blue dye for 24 h. Teeth were sectioned buccolingually. Digital photographs were made of sectioned surfaces using digital camera fitted on stereomicroscope. Microleakage was scored at occlusal and gingival margins using 0–3 scale. Dye penetration depth (DPD) at both margins was also measured using AnalySIS software. Data were analyzed using one-way ANOVA and Bonferroni multiple comparison test. Results. 5% of occlusal margins in Groups I and III had 50 μm average (DPD). In Group II, only 10% of occlusal margins showed dye penetration, with 60 μm average depth. For gingival margins, Groups I and III presented dye penetration in 55% of specimens, with 220 and 150 μm average (DPD), respectively. Group II had 60% of gingival margins, with 230 μm average (DPD). There was no significant difference in microleakage at occlusal and gingival margins in all groups. Dye penetration was larger at gingival than at occlusal margins (P < .001). Conclusion. None of placement techniques produced gap-free margins. Oblique and occlusogingival techniques exhibited higher degrees of microleakage at occlusal and gingival margins, as compared to that of split-increment technique. Splitting flat composite increment by diagonal cut, prior to light-curing, preserved bonded gingival margin integrity and reduced microleakage

Topics: Research Article
Publisher: Hindawi Publishing Corporation
OAI identifier:
Provided by: PubMed Central

Suggested articles


  1. (1996). A review of polymerization contraction: the influence of stress development versus stress relief,”
  2. (1984). annstr¨ om, “Communication between the oral cavity and the dental pulp associated with restorative treatment,”
  3. (1984). C.L.DavidsonandA.J.deGee,“Relaxationofpolymerization contraction stresses by flow in dental composites,”
  4. (1998). Clinical success of class V composite resin restorations without mechanical retention,”
  5. (1993). Composite resin-fundamentals and direct technique restorations,” in Esthetic Dentistry: A Clinical Approach to Techniques
  6. (2005). Developing a more complete understanding of stresses produced in dental composites during polymerization,”
  7. (2000). Direct anterior restorationsaesthetics and function,”
  8. (2001). Effect of composite resin placement techniques on the microleakage of two self-etching dentin-bonding agents,”
  9. (1986). Effect of placement techniques on microleakage of a dentin-bonded composite resin,”
  10. (2005). Effect of placement techniques on the marginal adaptation of class V composite restorations,”
  11. (2003). Increment technique for extended class V restorations: an experimental study,”
  12. (2004). Influence of c-factor and layering technique on microtensile bond strength to dentin,”
  13. (1988). L e c l a i r e ,L .W .B l a n k ,J .W .H a r g r a v e ,a n
  14. (1991). Marginal adaptation of class V restorations using different restorative techniques,”
  15. (1993). Marginal seal of cervical tooth-coloured restorations. A laboratory investigation of placement techniques,”
  16. (1988). Marginal sealing of curing contraction gaps in class V composite resin restorations,”
  17. (1976). Microleakage : a review,”
  18. (1972). Microleakage around dental restorations: a summarizing review,”
  19. (1993). Microleakage of class 5 composite resin restorations: a comparison between in vivo andinvitro,”
  20. (1999). Microleakage of composites and compomers in class V restorations,”
  21. (1991). Microleakage of three resin placement techniques,”
  22. (1996). Microleakage off class V composite, resin sandwich, and resin-modified glass ionomers,”
  23. (2002). MicroleakageofclassVcompositesusingdifferentplacement and curing techniques: an in vitro study,”
  24. (1989). Od´ en, “Effects of bonding agent types and incremental techniques on minimizing contraction gaps around resin composites,”
  25. (1990). Quantitative determination of stress reduction by flow in composite restorations,”
  26. (2003). Relationship between composite contraction stress and leakage in class V cavities,”
  27. (2006). S t a r r ,“ C l a s sVr e s t o r a t i o n s , ”i nFundamentals of Operative Dentistry:
  28. (1989). Shortcomings of composite resins in class V restorations,”
  29. (2007). Split-increment technique: an alternative approach for large cervical composite resin restorations,”
  30. (1984). The competition between the composite-dentin bond strength and the polymerization contraction stress,” J o u r n a lo fD e n t a lR e s e a r c h ,
  31. (2002). Tooth Colored Restoratives—Principles and Techniques,

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.