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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
Purpose: The purpose of this study is to evaluate the stability of dental implants restored using 3 different ceramic abutments before and after thermomechanical aging using the Resonance Frequency Analysis method. In this study, three working groups (n=5) were created: Lithium disilikat abutment, Prefabrike zirconium abutment and Zirconium abutment. In the lithium disilicate and zirconium abutment groups, for the purpose of obtaining experimental samples, the digital measurement of the implant, the neighboring teeth and the closing relationship, placed in the top right first cutting dent space on the model was taken. Abutment and lithium disilicate crown restorations on virtual models were designed and produced. If in the Prefabrike zirconium abutment group, it was produced by the company produced prepared zirconium abutment on the lithium disilicate crown restorations designed. All samples provided by the abutment-implant connection were exposed to a heat cycle of 1000 times in water with a temperature of 50C-550C and a mechanical cycle of 200000 with a force of 50N. After ageing, abutment and crowns were removed. Smartpegs of the manufacturer's company were placed on the implants. Implant stability ratio (ISQ) values were measured in four different areas before and after aging (buckal, palatal, interal and distal). For the comparison of ISQ values, two-factor-lu repeated measurable variance analysis was used. In calculations and interpretations the level of importance of 5 % was taken into account. Results: Varyans analysis found that the materialxtermo-mechanical aging interaction was not statistically important (P>.05), while the material and thermo-mechanical aging factors were statistically important (P<.05). The ISQ values decreased considerably after thermo-mechanical charging (P<.05). When the Bonferroni test was studied, the pre-fabric zirconium abutment gru found that it had a significantly higher ISQ average than the Lithium disilicate abutment group (P<.05). The result: a decrease in the ISQ values, which indicate a change in stability of the implants after charging, may indicate a decrease in the stability of the implants and bone interfaces. However, while interpreting the results obtained in this study, it should be taken into account that the acrylic resin material surrounding the implant has different characteristics than the living bone tissue. 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 tooth, 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 degrees of 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 durability of the 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
Journal Type : Ulusal
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