Publication: Microleakage and Marginal Integrity of Ormocer/Methacrylate-Based Bulk-Fill Resin Restorations in MOD Cavities: SEM and Stereomicroscopic Evaluation
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Date
2023-03-01
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Abstract
This in vitro study aimed to compare the microleakage and marginal integrity of methacrylate/ormocer-based bulk-fill composite (BFC) restorations used in cervical marginal relocation
with two different layering thicknesses in mesio-occlusal-distal (MOD) cavities exposed to thermomechanical loading. Standard MOD cavities were prepared in 60 mandibular molars and assigned
into three groups: x-tra fil/AF + x-tra base/XB, Tetric N-Ceram Bulk Fill/TNB + Tetric N-Flow Bulk
Fill/TFB, and Admira Fusion x-tra/AFX + Admira Fusion x-base/AFB. Each group was further
divided into two subgroups (2 mm and 4 mm) based on the thickness of flowable BFCs (n = 10).
The specimens were subjected to thermo-mechanical loading (240,000 cycles) and immersed in 0.2%
methylene blue. Following mesiodistal sectioning, the specimens were examined under stereomicroscope (×25) and scored (0–3) for microleakage. Marginal integrity was examined using a scanning
electron microscope (SEM). Descriptive statistical methods and the chi-square test were used to
evaluate the data (p < 0.05). While there was no statistically significant difference in gingival cement
microleakage in the XB and AFB specimens with a 4 mm thickness, microleakage was significantly
increased in the TFB specimen (p = 0.604, 0.481, 0.018 respectively). A significantly higher amount
of score 0 coronal microleakage was detected in the AFX2 mm + AFB4 mm compared to the TNB2
mm + TFB4 mm (p = 0.039). The SEM examination demonstrated better marginal integrity in groups
with 2 mm thick flowable BFCs. Ormocer and methacrylate-based materials can be used in marginal
relocation with thin layers.
Keywords: bulk-fill composite; layering thicknesses; marginal relocation; microleakage; ormocer
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Keywords
Diş Hekimliği, Sağlık Bilimleri, Dentistry, Health Sciences, Klinik Tıp (MED), Klinik Tıp, DİŞ HEKİMLİĞİ, ORAL CERRAHİ VE TIP, Clinical Medicine (MED), CLINICAL MEDICINE, DENTISTRY, ORAL SURGERY & MEDICINE, Periodontoloji, Ortodonti, Ağız Cerrahisi, Diş Hijyeni, Dişçilik Hizmetleri, Diş Hekimliği (çeşitli), Periodontics, Orthodontics, Oral Surgery, Dental Hygiene, Dental Assisting, Dentistry (miscellaneous), General Dentistry, bulk-fill composite, layering thicknesses, marginal relocation, microleakage, ormocer
Citation
Şenol A. A., Karabulut Gencer B., Tarçın B., Kahramanoğlu E., Yılmaz Atalı P., "Microleakage and Marginal Integrity of Ormocer/Methacrylate-Based Bulk-Fill Resin Restorations in MOD Cavities: SEM and Stereomicroscopic Evaluation", POLYMERS, cilt.15, ss.1-12, 2023