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Journals / Kırıkkale Üniversitesi Tıp Fakültesi Dergisi / 2026 / Cilt: 28 Sayı: 2

IN VITRO EVALUATION OF ACCURACY OF DIGITAL IMPRESSIONS VERSUS CONVENTİONAL IMPRESSIONS AT VARYING IMPLANT DEPTHS FOR SINGLE CROWNS

Tek Kronlar İçin Farklı İmplant Derinliklerinde Dijital ve Konvansiyonel Ölçülerin Doğruluğunun İn Vitro Değerlendirilmesi

Vildan Aslıyüce0000-0003-3311-3426
Nihal Özcan(KIRIKKALE ÜNİVERSİTESİ, DİŞ HEKİMLİĞİ FAKÜLTESİ)0000-0003-2022-6085
Elif Yiğit İren(KIRIKKALE ÜNİVERSİTESİ, DİŞ HEKİMLİĞİ FAKÜLTESİ)0000-0003-3256-062X
Buse Özdemir Önal(KIRIKKALE ÜNİVERSİTESİ)0009-0004-3166-8692
Pages
220–226
Publication Date
2026-08-12
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Digital techniques maintain higher accuracy across varying depths, whereas conventional techniques, particularly those using C-silicone, exhibit reduced performance at deeper levels.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: This in vitro study aimed to evaluate the effect of implant vertical positioning on the accuracy of digital and conventional impressions for single implants using three-dimensional superimposition analysis.
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Key Findings & Data:Material and Methods: A master model with a single implant analog (Biohorizons, 5.7 mm) was prepared at three different gingival depths (2 mm, 4 mm, and 6 mm) in the mandibular first molar region.
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Conclusion & Impact:Digital techniques maintain higher accuracy across varying depths, whereas conventional techniques, particularly those using C-silicone, exhibit reduced performance at deeper levels.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Dijital ölçü · konvansiyonel ölçü · implant derinliği

Abstract

Objective: This in vitro study aimed to evaluate the effect of implant vertical positioning on the accuracy of digital and conventional impressions for single implants using three-dimensional superimposition analysis. Material and Methods: A master model with a single implant analog (Biohorizons, 5.7 mm) was prepared at three different gingival depths (2 mm, 4 mm, and 6 mm) in the mandibular first molar region. Digital impressions were obtained using two intraoral scanners (Trios 3Shape and Cerec Omnicam), while conventional impressions were taken using polyvinylsiloxane (PVS) and condensation silicone (Type C silicone). In total, 96 test models (n=8 per group) were generated. All models were digitized and compared to the reference STL model using reverse-engineering software (Rapidform) for 3D deviation analysis. Statistical analysis was performed using the Kruskal-Wallis and Mann-Whitney U tests (α=0.05). Results: No statistically significant differences were observed between the digital impression groups (p>0.05). Among conventional techniques, the group using C-silicone showed significantly higher deviations than the PVS group (p<0.05). Increasing gingival depth resulted in significantly greater deviation values in all axes, especially in the y- and z-axes at 6 mm depth (p<0.05). Conclusion: The vertical gingival depth has a significant influence on impression accuracy. Digital techniques maintain higher accuracy across varying depths, whereas conventional techniques, particularly those using C-silicone, exhibit reduced performance at deeper levels.

Özet

Amaç: Bu in vitro çalışmanın amacı, tek implantlı restorasyonlarda implantın dikey konumunun dijital ve konvansiyonel ölçü tekniklerinin doğruluğu üzerindeki etkisini üç boyutlu süperimpozisyon analizleri kullanarak değerlendirmektir. Gereç ve Yöntemler: Mandibular birinci molar bölgesinde yer alan bir implant analogu, üç farklı gingival derinlikte (2 mm, 4 mm, 6 mm) olacak şekilde ana modele yerleştirildi. Dijital ölçüler Trios 3Shape ve Cerec Omnicam tarayıcılarıyla, konvansiyonel ölçüler ise polivinilsiloksan (PVS) ve kondenzasyon tipi silikon (C-silikon) ile alındı. Toplam 96 test modeli (her grup için n=8) oluşturuldu. Tüm modeller dijitalize edilerek referans STL modeliyle karşılaştırıldı ve 3D sapma analizleri Rapidform yazılımı ile gerçekleştirildi. İstatistiksel değerlendirmede Kruskal-Wallis ve Mann-Whitney U testleri kullanıldı (α=0,05). Bulgular: Dijital ölçü grupları arasında anlamlı bir fark saptanmadı (p>0,05). Konvansiyonel yöntemlerde C-silikonla alınan ölçüler, PVS grubuna kıyasla anlamlı derecede daha yüksek sapma gösterdi (p<0,05). Gingival derinlik arttıkça tüm eksenlerde, özellikle 6 mm derinlikte y- ve z-ekseni sapmalarında belirgin artış gözlendi (p<0,05). Sonuç: İmplantın dikey gingival derinliği ölçü doğruluğunu anlamlı düzeyde etkilemektedir. Dijital ölçü teknikleri farklı derinliklerde yüksek doğruluğu korurken, konvansiyonel yöntemler—özellikle C-silikon—daha derin implant konumlarında belirgin doğruluk kaybı göstermektedir.

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Cite This Article

Aslıyüce, V., Özcan, N., İren, E. Y., Önal, B. Ö. (2026). IN VITRO EVALUATION OF ACCURACY OF DIGITAL IMPRESSIONS VERSUS CONVENTİONAL IMPRESSIONS AT VARYING IMPLANT DEPTHS FOR SINGLE CROWNS. Kırıkkale Üniversitesi Tıp Fakültesi Dergisi, Cilt: 28 Sayı: 2, 220–226. https://doi.org/10.24938/kutfd.1836746

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