Bazı yeni sabitleyici dental sistemler ile desteklenen seramik kronların kırılma yükü
Amaç: Bu çalışmanın amacı, bilgisayar yardımlı tasarım/bilgisayar yardımlı imalat (BYT/BYİ; CAD/CAM) anterior diş endo-kron ve fiberle güçlendirilmiş kompozit (FGK) esaslı post-kor restorasyonunun kırılma yükünün değerlendirilmesidir. Gereç ve Yöntem: CAD/CAM ile kanin kök modeli şeklinde zirkonya model (Ice Zirconia, ZirkonZahn GmBH, Bruneck, Italy) üzerinde toplam 40 post-kor destekli kron ve endokron yapıldı. Statik taşıma yükü kapasitesi değerlendirmesi şu restorasyon gruplarında yapıldı: Grup 1: CAD/CAM tek parça FGK post-kor-kron sistemi (deneysel CAD/CAM FGK blok) ile desteklenen zirkonya kron (Prettau anterior, ZirkonZahn GmBH); Grup 2: Devamlı olmayan FGK kor (EverX posterior, GC Corp., Tokyo, Japan) ve FGK post (GC Corp.) ile desteklenen zirkonya kron (Prettau anterior); Grup 3: Zirkonya endokron (Prettau anterior) ve Grup 4: Lityum disilikat seramik endokron (IPS e.max CAD, Ivoclar Vivadent AG, Schaan, Liechtenstein) (n = 10/grup). Kronların/endokronların zirkonya kök modele adeziv simantasyonunu takiben, universal test cihazında dişlerin uzun eksenine 45° olacak şekilde yük uygulandı. Kırık modları görsel olarak değerlendirildi. İstatistiksel analiz tek-yönlü ANOVA ve Tukey post-hoc testleri ile gerçekleştirildi. Bulgular: Grupların kırılma yükü değerleri arasında anlamlı farklılık gözlendi (p<0.05). Grupların istatistiksel olarak sıralanması şu şekildedir: Grup 3 (1168 ± 141 N) > Grup 4 (721 ± 96 N) ≥ Grup 1 (680 ± 86 N) > Grup 2 (534 ± 36 N). Sonuç: Endokron monoblok restorasyonlar, fiberle güçlendirilmiş post-kor restorasyon destekli kron restorasyonlara alternatif olarak kullanılabilir.
Anahtar Kelimeler:
Bilgisayar yardımlı tasarım, bilgisayar yardımlı imalat, kök çivisi tekniği, seramikler
Fracture load of ceramic crowns supported by some novel anchoring dental systems
Objective: This study aimed to evaluate the fracture load of endocrown restorations and fiber-reinforced composites (FRCs) fabricated through computer-aided design/computer-aided manufacturing (CAD-CAM) for post–cores of anterior teeth. Materials and Method: Forty post–core-supported crowns and endocrowns were fabricated through CAD-CAM on a canine root zirconia model (Ice Zirconia, ZirkonZahn GmBH, Bruneck, Italy). The static load-bearing capacity was measured on the following restoration groups: Group 1: zirconia crown (Prettau anterior, ZirkonZahn GmBH) retained with CAD-CAM one-piece FRC post-core crown system (experimental CAD-CAM FRC block); Group 2: zirconia crown (Prettau anterior) retained with FRC post (GC Corp., Tokyo, Japan) with discontinuous fiber composite (EverX posterior, GC Corp) core; Group 3: zirconia endocrown (Prettau anterior); and Group 4: lithium disilicate ceramic endocrown (IPS e.max CAD, Ivoclar Vivadent AG, Schaan, Liechtenstein) (n = 10/per group). After the adhesive cementation of crowns/endocrowns to the zirconia root model, a load was applied at 45° to the long axis of the teeth and measured using a universal testing machine. The fracture modes were visually examined. The statistical analyses were performed using one-way ANOVA and Tukey post-hoc tests (p < 0.05). Results: The fracture load significantly differed among the groups (p < 0.05) and was ranked as follows: Group 3 (1168 ± 141 N) > Group 4 (721 ± 96 N) ≥ Group 1 (680 ± 86 N) > Group 2 (534 ± 36 N). Conclusion: Endocrown monoblock restorations can be used as an alternative to fiber-reinforced post–core supported crown restorations.
Keywords:
Ceramics Computer-aided manufacturing, Post and core technique, Computer-aided design, Post and core technique,
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- Yayın Aralığı: Yılda 3 Sayı
- Başlangıç: 1984
- Yayıncı: Gazi Üniversitesi Diş Hekimliği Fakültesi Dergisi
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