Evaluation of the effects of preform arch wires on dental arch by 3D model analysis

Year 2021, Volume: 38 Issue: 3, 75 - 80, 01.09.2021

Gamze Metin Gürsoy , Sevil Akkaya

https://doi.org/10.17214/gaziaot.789600

Abstract

Objective: The aim of this study was to evaluate the effects of preform arch wires used in fixed orthodontic treatments on the lower and upper dental arch-forms with three-dimensional (3D) model analysis.

Materials and Method: This study consisted of pre-treatment (T0) and post-treatment (T1) dental models of 46 patients who had minimal anterior crowding (approximately 3 mm) on the lower and upper arch, and treated in Gazi University, Faculty of Dentistry, Department of Orthodontics. Dental models were scanned using 3Shape R700 3D Scanner and the data was imported into the 3Shape ortho analyzer software program in the form of STL image files. Upper and lower inter-canine, inter-1. bicuspid, inter-2. bicuspid, inter-molar distances, canine and molar depth measurements were performed. Calculation of the area for maxilla was measured between the mucogingival junction of all teeth and the distal points of the 1st molar teeth. Kolmogorov-Smirnov test was used to check the normality. Descriptive statistics were presented as means and standard deviations. Paired t-test was used to compare two dependent groups. The level of significance was taken as 0.05.

Results: Significant increases were observed in all parameters except canine depth in the maxilla and inter-canine width during treatment. The highest increase in the maxilla was observed in the inter-1. bicuspid with a value of 2.6 mm (p<0.001). On the other hand, the highest increase in the mandible was observed in the inter-2. bicuspid dimension with a value of 2.45 mm (p<0.001). The increase in maxillary area was significant with an average of 81.69 mm2 (p<0.001). The increase in molar depth was determined as 0.5 mm for both maxilla and mandible (p<0.001).

Conclusion: Ni-Ti leveling arches, which are selected in accordance with the pre-treatment arch form of the patients, cause significant increases in the transversal direction in both the maxilla and mandible.

Keywords

Three-Dimensional Image, Dental arches, Orthodontic wires

Preform ark tellerinin dental arklar üzerine etkilerinin 3D model analizi ile değerlendirilmesi

Abstract

Amaç: Çalışmanın amacı, sabit ortodontik tedavilerde kullanılan prefabrik ark tellerinin maksiller ve mandibular çene dental ark formu üzerine etkilerinin 3-boyutlu (3D) olarak değerlendirilmesidir.

Gereç ve Yöntem: Çalışmaya Gazi Üniversitesi Diş Hekimliği Fakültesi Ortodonti Anabilim Dalında tedavi görmüş maksilla ve mandibulada yaklaşık 3 mm olmak üzere minimal çapraşıklığa sahip olan 46 bireyin tedavi başı (T0) ve tedavi sonu (T1) dental modelleri dahil edildi. Dental alçı modelleri 3Shape R700 3D Scanner ile taranarak STL görüntü dosyaları şeklinde, 3Shape ortho analyzer software programına aktarıldı. 3D görüntüler üzerinde maksilla ve mandibula için inter-kanin, inter-1. premolar, inter-2. premolar, inter-molar mesafeler, kanin derinliği, molar derinliği ölçümleri yapıldı. Maksilla için ayrıca alan hesaplanması tüm dişlerin mukogingival birleşim hattı ile distalde 1. molar dişlerin distal noktaları arasındaki alan için yapıldı. Normallik varsayımının incelenmesinde Kolmogorov-Smirnov testi kullanıldı. Tanımlayıcı istatistikler, ortalama ve standart sapmalar şeklinde sunuldu. Bağımlı iki grubun karşılaştırılmasında eşleştirilmiş t-testi kullanıldı. Anlamlılık düzeyi için sınır 0.05 olarak alındı.

Bulgular: Maksillada kanin derinliği, mandibulada ise inter-kanin genişlik haricinde tüm değerlerde tedavi ile anlamlı artışlar görüldü. Maksillada en fazla artış 2.6 mm ile 1.premolar dişler arasında izlenirken, mandibulada 2.45 mm ile 2.premolar dişler arasında izlendi (p<0.001). Maksiller alan artışı ise ortalama 81.69 mm2 ile anlamlı bulundu (p<0.001). Molar derinlik artışı hem maksilla hem de mandibula için 0.5 mm olarak tespit edildi (p<0.001).

Sonuç: Hastaların tedavi başı ark formuna uygun olarak seçilen Ni-Ti seviyeleme arkları hem maksilla hem de mandibulada transversal yönde anlamlı artışlara sebep olmaktadır.

Keywords

Üç-Boyutlu Görüntü, Dental arklar, ortodontik teller

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