TERMOMEKANİK YAŞLANDIRMANIN FARKLI SERAMİK ABUTMENTLARA SAHİP İMPLANTLARIN STABİLİTESİNE ETKİSİ

Year 2019, Volume: 29 Issue: 1, 80 - 88, 15.01.2019

Merve Bankoğlu Güngör , Seçil Karakoca Nemli Meral Bağkur Mustafa Kocacıklı

https://doi.org/10.17567/ataunidfd.522757

Abstract

Amaç: Bu çalışmanın amacı, 3 farklı seramik abutment
kullanılarak restore edilen dental implantların termomekanik yaşlandırma
öncesinde ve sonrasında stabilitelerinin Rezonans Frekans Analizi yöntemi ile
değerlendirilmesidir.

Gereç ve
Yöntem: Bu çalışmada, Lityum disilikat
abutment, Prefabrike zirkonya abutment
ve Zirkonya abutment olmak üzere üç çalışma grubu (n=5) oluşturuldu. Lityum disilikat ve
zirkonya abutment gruplarında, deney örneklerinin elde edilmesi amacıyla, model
üzerinde üst sağ birinci kesici diş boşluğuna yerleştirilen implantın, komşu
dişlerin ve kapanış ilişkisinin dijital ölçüsü alındı. Sanal modeller üzerinde
abutment ve lityum disilikat kron restorasyonları tasarlandı ve üretildi.
Prefabrike zirkonya abutment grubunda ise, firma tarafından üretilen hazır
zirkonya abutment üzerine lityum disilikat kron restorasyonları tasarlanarak
üretildi. Abutment-implant bağlantısı sağlanan tüm örnekler, sıcaklığı 5⁰C–55⁰C
olan suda 1000 kez ısı döngüsüne ve 50 N’luk kuvvet ile 200000 mekanik siklusa
maruz bırakıldı. Yaşlandırma sonra- sında, abutment ve kronlar çıkarıldı.
İmplantların üzerine üretici firmaya ait Smartpeg’ler yerleştirildi. İmplant
stabilite katsayısı (ISQ) değerleri, yaşlandırma öncesi ve sonrasında dört
farklı bölgeden (bukkal, palatal, mezial ve distal) ölçüle- rek kaydedildi. ISQ
değerlerinin karşılaştırılması için iki-faktör- lü tekrarlanan ölçümlü varyans
analizi kullanıldı. Hesaplama ve yorumlamalarda % 5’lik önem düzeyi dikkate
alındı.

Bulgular: Varyans analizi sonucunda materyalxtermo- mekanik
yaşlandırma interaksiyonunun istatistiksel olarak önemli olmadığı (P>.05),  materyal ve termomekanik yaşlandırma
faktörlerinin ise istatistiksel olarak önemli olduğu bulundu (P<.05). ISQ değerleri termomekanik
yükleme sonrası önemli derecede azaldı (P<.05).
Bonferroni testi so- nuçları incelendiğinde; Prefabrike zirkonya abutment gru-
bunun Lityum disilikat abutment grubundan anlamlı derecede yüksek ISQ
ortalamasına sahip olduğu görüldü (P<.05).

Sonuç: İmplantların yükleme sonrasında stabilitelerindeki değişimi
gösteren ISQ değerlerinin azalması, implant ve kemik ara yüzünün sağlamlığında
azalmaya işaret olabilir. Ancak bu çalışmada elde edilen sonuçlar
yorumlanırken, implantı çevreleyen akrilik rezin materyalinin canlı kemik
dokudan farklı özellikler gösterdiği göz önüne alınmalıdır.

Anahtar
Kelimeler: Dental implant, Seramikler, Dental implant-kaide tasarımı

EFFECT OF THERMOMECHANICAL AGING ON THE STABILITY OF IMPLANTS WITH DIFFERENT
CERAMIC ABUTMENTS

Aim: The purpose of the present study was to evaluate the
stability of the dental implants with different ceramic abutments before and
after thermomechanical aging by Resonance Frequency Analysis.

Material and
Methods: In the present study, three experimental
groups (n=5) were
generated as: Lithium disilicate abutment, Prefabricated zirconia abutment, and
Zirconia abutment. For producing the lithium disilicate abutments and Zirconia
abutments, digital impressions were taken from the implants which were inserted
on the model into the missing area of the upper right central tooth, adjacent
and opposite teeth, and buccal side. Abutments and lithium disilicate crown
restorations were designed and milled. In the Prefabricated zirconia abutment
group, zirconia abutments which were prefabricated by the manufacturer were
used. All specimens which the implant-abutment connection was done were
subjected to 1000 thermal cycles at 5-55 centigrade degrees water and 200000
mechanical cycles with 50 N load. The abutments and crowns were removed after
aging. Manufacturer’s Smartpegs were inserted onto the implants. Implant
stability quotient (ISQ) values were measured from the four different sections
(buccal, palatal, mesial, and distal) before and after the thermomechanical
aging and recorded. Two-way Analysis of Variance with repeated measures was
used to compare the ISQ values. The alpha level was set at 5%.

Results: Variance analysis showed that materialx thermomechanical
aging interaction was not significant (P>.05);
however, the effects of the material and thermomechanical aging factors were
found to be significant (P<.05).
ISQ values were significantly decreased after the thermomechanical aging (P<.05). According to the Bonferroni
results, Prefabricated zirconia abutment group showed significant higher ISQ
mean values than Lithium disilicate abutment group (P<.05).

Conclusion: Decrease on the ISQ values after aging may be a sign of
the decrease on the durableness of implant-bone interface. However, it must be
under consideration to evaluate the results of the present study that acrylic
resin has different properties than living bone tissue.Key
Words: Dental implant,
Ceramics, Dental
Implant-Abutment Design

 

Keywords

Dental implant, Seramikler

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