Bazı yeni sabitleyici dental sistemler ile desteklenen seramik kronların kırılma yükü

Yıl 2018, , 33 - 37, 12.04.2018

İsil Cekic Nagas , Emre Nagas , Ferhan Egilmez , Gulfem Ergun , Pekka Vallittu Lippo Lassila

https://doi.org/10.17214/gaziaot.327867

Cited By: 1

Öz

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

Öz

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.

Anahtar Kelimeler

Ceramics, Computer-aided manufacturing, Post and core technique, Computer-aided design, Post and core technique

Kaynakça

• Lauvahutanon S, Takahashi H, Shiozawa M, Iwasaki N, Asakawa Y, Oki M, et al. Mechanical properties of composite resin blocks for CAD/CAM. Dent Mater J 2014;33:705-10.
• Elsaka SE. Bond strength of novel CAD/CAM restorative materials to self-adhesive resin cement: the effect of surface treatments. J Adhes Dent 2014;16:531-40.
• Guess PC, Zavanelli RA, Silva NR, Bonfante EA, Coelho PG, Thompson VP. Monolithic CAD/CAM lithium disilicate versus veneered Y-TZP crowns: comparison of failure modes and reliability after fatigue. Int J Prosthodont 2010;23:434-42.
• Yu W, Guo K, Zhang B, Weng W. Fracture resistance of endodontically treated premolars restored with lithium disilicate CAD/CAM crowns or onlays and luted with two luting agents. Dent Mater J 2014;33:349-54.
• Magne P, Schlichting LH, Maia HP, Baratieri LN. In vitro fatigue resistance of CAD/CAM composite resin and ceramic posterior occlusal veneers. J Prosthet Dent 2010;104:149-57.
• Schmitter M, Mueller D, Rues S. Chipping behaviour of all-ceramic crowns with zirconia framework and CAD/CAM manufactured veneer. J Dent 2012;40:154-62.
• Sulaiman TA, Abdulmajeed AA, Donovan TE, Ritter AV, Lassila LV, Vallittu PK, et al. Degree of conversion of dual-polymerizing cements light polymerized through monolithic zirconia of different thicknesses and types. J Prosthet Dent 2015;114:103-8.
• Muñoz EM, Longhini D, Antonio SG, Adabo GL. The effects of mechanical and hydrothermal aging on microstructure and biaxial flexural strength of an anterior and a posterior monolithic zirconia. J Dent 2017;63:94-102.
• Sulaiman TA, Abdulmajeed AA, Shahramian K, Lassila L. Effect of different treatments on the flexural strength of fully versus partially stabilized monolithic zirconia. J Prosthet Dent 2017;118:216-20.
• Sulaiman TA, Abdulmajeed AA, Donovan TE, Vallittu PK, Närhi TO, Lassila LV. The effect of staining and vacuum sintering on optical and mechanical properties of partially and fully stabilized monolithic zirconia. Dent Mater J 2015;34:605-10.
• Gresnigt MM, Özcan M, van den Houten ML, Schipper L, Cune MS. Fracture strength, failure type and Weibull characteristics of lithium disilicate and multiphase resin composite endocrowns under axial and lateral forces. Dent Mater 2016;32:607-14.
• Le Bell-Rönnlöf A-M, Lassila LVJ, Kangasniemi I, Vallittu PK. Load-bearing capacity of human incisors restored wit prefabricated and individually formed fiber reinforced composite posts. Dent Mater 2011;27:107-15.
• Sedrez-Porto JA, Rosa WL, da Silva AF, Münchow EA, Pereira-Cenci T. Endocrown restorations: A systematic review and meta-analysis. J Dent 2016;52:8-14.
• Chang C-Y, Kuo J-S, Lin Y-S, Chang Y-H. Fracture resistance and failure modes of CEREC endo-crowns and conventional post and core-supported CEREC crowns. J Dent Sci 2009;4:110-7.
• Ozcan M, Valandro LF. Fracture strength of endodontically-treated teeth restored with post and cores and composite cores only. Oper Dent 2009;34:429-36. Carlini-Jr B, Cecchin D, Pereira GD, Paulillo LA. Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts. Braz Oral Res 2011:25:345-50.
• Junqueira RB, de Carvalho RF, Marinho CC, Valera MC, Carvalho CAT. Influence of glass fibre post length and remaining dentine thickness on the fracture resistance of root filled teeth. Int Endod J 2017;50:569-77.
• Ceyhanli KT, Orucoglu H, Erdilek N, Turkun M, Akdag MS. Microleakage of 4 post-luting cements evaluated by the computerized fluid filtration method. Int J Artif Organs 2015;38:646–50.
• Sun T, Zhou S, Lai R, Liu R, Ma S, Zhou Z, et al. Load-bearing capacity and the recommended thickness of dental monolithic zirconia single crowns. J Mech Behav Biomed Mater 2014;35:93-101.
• Waltimo A, Könönen M. Maximal bite force and its association with signs and symptoms of craniomandibular disorders in young Finnish non-patients. Acta Odontol Scand 1995;53:254-8. Nicola S, Forniglia A, Tempesto RM, Comba A, Saratti CM, Pasqualini D, et al. Effects of fiber-glass reinforced composite restorations on fracture resistance and failure mode of endodontically treated molars. J Dent 2016:53;82-7.
• Fahmy NZ. Effect of dowel material and design on the fracture resistance of premolars. Dentistry 2012:2;116.