Hastabaşı CAD/CAM sistemi ile üretilen posterior tam seramik kronların marjinal ve internal adaptasyonlarının değerlendirilmesi: in vitro çalışma

Year 2018, , 1 - 8, 27.07.2017

Merve Bankoğlu Güngör , Aylin Doğan , Bilge Turhan Bal Seçil Karakoca Nemli

https://doi.org/10.17214/gaziaot.306165

Abstract

Amaç: Hastabaşı bilgisayar destekli tasarım / bilgisayar
destekli üretim (CAD/CAM) teknolojisindeki ve materyal bilimindeki ilerlemeler,
günümüzde anterior ve posterior dişler için estetik restorasyonların yapımını
olanaklı hale getirmiştir. Ancak, üretilen yeni CAD/CAM materyallerinin
marjinal ve internal adaptasyonları ile ilgili yeterince veri yoktur. Bu çalışmanın
amacı; hastabaşı CAD/CAM sistemi ile üretilen posterior tam seramik
restorasyonların marjinal ve internal adaptasyonlarını değerlendirmektir.

Gereç ve Yöntem: Yapay bir alt sol birinci büyükazı dişi standart diş
kesimi kurallarıyla prepare edildi ve prepare edilen dişlerden standart
modeller oluşturuldu. Tam seramik restorasyonlar
(n=10), yedi farklı CAD/CAM materyalinden üretildi (IPS e.max CAD, Lava
Ultimate, Incoris TZI, Incoris ZI, Vita Suprinity, Vita
Enamic, ve GC Cerasmart). Örneklere ait marjinal ve internal adaptasyonlar;
ince bir bistüri yardımıyla kesilen silikon replikalardan ölçüldü. Day
materyali ve restorasyonun iç yüzeyi arasındaki boşluğu temsil eden silikon
replika 50× büyütmeye sahip ışık mikroskobunda dijital kamera ile incelendi. Her
bukkal-lingual bölümden dört referans noktası ve her mezial-distal bölümden
sekiz referans noktası belirlenerek incelendi. Sonuçlar iki yönlü varyans
analizi ve Tukey HSD testi ile değerlendirildi (α=0.05).

Bulgular: Marjinal-internal
alanlarda görülen değerler genellikle marjinal alanlardaki değerlerden yüksek
bulundu. Materyaller arasında anlamlı farklılıklar bulundu. İstatistik analiz sonucunda;
materyal tipi ve referans noktasının lokalizasyonu arasında interaksiyon
bulundu (p<0.05). En düşük değerler aksiyel alanlarda ve en
yüksek değerler ise oklüzal alanlarda gözlendi.

Sonuç: Bütün materyaller klinik olarak kabul edilebilir derecede
marjinal ve internal uyumsuzluk gösterdi.

Keywords

Bilgisayar yardımlı tasarım, dental marjinal adaptasyon, seramikler

Evaluation of marginal and internal adaptations of posterior all-ceramic crowns fabricated with chair-side CAD/CAM system: an in vitro study

Abstract

Objective: Advances in chair-side Computer-Aided
Design / Computer-Aided Manufacturing (CAD/CAM) technology and materials
science currently enable the fabrication of highly esthetic restorations for
the anterior and posterior teeth. However, there is a lack of evidence
regarding the marginal and internal adaptations of new CAD/CAM materials. The objective of this study
was to evaluate the marginal and internal adaptations of posterior
all-ceramic restorations fabricated from contemporary restorative materials with
chair-side CAD/CAM system.

Materials and Method: An artificial mandibular left first molar tooth was prepared according
to standard tooth preparation procedures, and standard models of the prepared
teeth were obtained. All-ceramic restorations (n=10) were
fabricated from seven different CAD/CAM blocks (IPS e.max CAD, Lava Ultimate,
Incoris TZI, Incoris ZI, Vita Suprinity, Vita Enamic, and GC Cerasmart). The
marginal and internal adaptations were measured with silicone replicas, which
were sectioned with a thin lancet. The discrepancy between the die and the
inner surface of the restoration was examined at 50× magnification by using a
light microscope with digital camera. Four reference points were examined at
each buccal-lingual section and eight reference
points were examined at each mesial-distal section. The results were evaluated
by two-way analysis of variance (ANOVA) followed by Tukey HSD test (α=0.05).

Results: The values obtained from
marginal-internal areas were generally greater than those in the marginal
areas. Significant differences were found between the materials. The
statistical analysis revealed that there was an interaction between the
material type and the location of the reference points (p<0.05); the lowest
values were observed in axial areas, and the highest values were observed in
occlusal areas.

Conclusion: All materials showed low marginal and internal discrepancies which were
considered clinically acceptable.

Keywords

Ceramics, computer-aided design, dental marginal adaptation

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