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Journals / Selcuk Dental Journal / 2024 / Volume: 11 Issue: 3

Comparison of the primary stability of orthodontic mini-screws manufactured by the Computer Numerically Control and Selective Laser Melting manufacturing methods: An exploratory study

Bilgisayar Sayısal Kontrollü ve Seçici Lazer Eritme üretim yöntemleriyle üretilen ortodontik mini vidaların primer stabilitelerinin karşılaştırılması: Keşif amaçlı bir çalışma

Meriç Öztürk Yaşar(ERCİYES ÜNİVERSİTESİ, DİŞ HEKİMLİĞİ FAKÜLTESİ)0000-0002-6972-4766
Celal Irgın(Erciyes Üniversitesi)0000-0002-1535-3402
Pages
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Publication Date
2024-12-23
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Keywords: Orthodontic mini-screw, Primary stability, Selective laser melting, Computer numerical control, Radiofrequency analysis

📌 3 Key Takeaways

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Objective & Hypothesis:Background: This study was to assess the primary stability of orthodontic mini-screws of the same design produced by a conventional and a novel manufacturing method.
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Key Findings & Data:Methods: A total of 150 orthodontic mini-screws with a body length of 8 mm, a diameter of 1.6 mm, a button head, and a self-drilling feature were used in the study.
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Conclusion & Impact:Keywords: Orthodontic mini-screw, Primary stability, Selective laser melting, Computer numerical control, Radiofrequency analysis
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Orthodontic mini-screw · Primary stability · Selective laser melting

Abstract

Background: This study was to assess the primary stability of orthodontic mini-screws of the same design produced by a conventional and a novel manufacturing method. Methods: A total of 150 orthodontic mini-screws with a body length of 8 mm, a diameter of 1.6 mm, a button head, and a self-drilling feature were used in the study. Mini-screws were manufactured through computer numerically controlled (CNC) and selective laser melting (SLM) manufacturing methods. Titanium (T) and stainless steel (SS) alloys were used as manufacturing materials. The study was conducted on three groups; CNC-T, SLM-T and SLM-SS. Mini-screws were placed at 60- and 90-degree angles in fresh bovine femur bones, where the cortical bone thickness was 2 mm. With the radiofrequency analysis (RFA) technique, the stability of the mini-screws was determined immediately after they were placed (F0), immediately after applying orthodontic force to the mini-screw (F1), after six hours (F6), and after 24 hours (F24). Three-way robust ANOVA was used to compare the data, and the Bonferroni correction was statistically applied. Results: Except for the insertion angle of the mini-screw, the group and time factors had statistically significant effects on the RFA values. The highest RFA value was detected in the SLM-T group. Conclusion: Orthodontic mini-screws manufactured from titanium or stainless steel alloys using the SLM technology can be an alternative to mini-screws manufactured using the traditional manufacturing method. The mini-screws manufactured using the SLM technology demonstrated adequate primary stability when subjected to an orthodontic force. Keywords: Orthodontic mini-screw, Primary stability, Selective laser melting, Computer numerical control, Radiofrequency analysis

Özet

Amaç: Bu çalışmanın amacı, geleneksel ve yeni bir üretim yöntemiyle üretilen aynı tasarıma sahip ortodontik mini vidaların primer stabilitesini değerlendirmekti. Gereç ve Yöntemler: Çalışmada gövde uzunluğu 8 mm, çapı 1.6 mm, düğme başlıklı ve kendinden delme özelliğine sahip toplamda 150 adet ortodontik mini vida kullanıldı. Mini vidalar bilgisayarlı sayısal kontrollü (CNC) ve seçici lazer eritme (SLM) üretim yöntemleriyle üretildi. İmalat malzemesi olarak titanyum (T) ve paslanmaz çelik (SS) alaşımlar kullanıldı. Çalışma CNC-T, SLM-T ve SLM-SS olmak üzere üç grup üzerinde yürütüldü. Mini vidalar, kortikal kemik kalınlığının 2 mm olduğu taze sığır femur kemiklerine 60 ve 90 derecelik açılarla yerleştirildi. Mini vidaların primer stabiliteleri Radyofrekans analiz (RFA) tekniği ile mini vidalar yerleştirildikten hemen sonra (F0), mini vidalara ortodontik kuvvet uygulandıktan hemen sonra (F1), 6 saat sonra (F6) ve 24 saat sonra (F24) ölçüldü. Verileri karşılaştırmak için üç yönlü robust ANOVA test istatistiği kullanıldı ve Bonferroni düzeltmesi uygulandı. Bulgular: Mini vidaların yerleştirme açısı dışında, grup ve zaman faktörlerinin RFA değerleri üzerinde istatistiksel olarak anlamlı etkileri vardı. En yüksek RFA değeri SLM-T grubunda tespit edildi. Sonuçlar: SLM teknolojisi kullanılarak titanyum veya paslanmaz çelik alaşımlardan üretilen ortodontik mini vidalar, geleneksel üretim yöntemi kullanılarak üretilen mini vidalara alternatif olabilir. SLM teknolojisi kullanılarak üretilen mini vidalar, ortodontik kuvvete maruz kaldıklarında yeterli primer stabilite göstermişlerdir.

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Cite This Article

Yaşar, M. Ö., Irgın, C. (2024). Comparison of the primary stability of orthodontic mini-screws manufactured by the Computer Numerically Control and Selective Laser Melting manufacturing methods: An exploratory study. Selcuk Dental Journal, Volume: 11 Issue: 3. https://doi.org/10.15311/selcukdentj.1497317

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