Objectives: To determine if an association exists between the prevalence of white spot lesions (WSLs) and orthodontic treatment using clear aligners.
Methods: Electronic databases were searched with no restrictions on year. Article selection criteria included human clear aligner studies conducted during the permanent dentition and with a full description of the applied technique and oral hygiene status.
Results: The search strategy resulted in a total of 4177 articles. After title and abstract screening, 156 relevant articles were identified from which five remained after the application of the exclusion criteria. The articles were mostly classified as having a low risk of bias.
Conclusions: Clear aligner therapy induces a lower development rate of new WSLs than orthodontic treatment by fixed appliances. In patients who have poor oral hygiene and/or existing WSLs, clear aligner treatment could be recommended.
ÖZ
Amaç: Bu kesitsel çalışmanın amacı 11-15 yaş arası çocuklarda ortodontik tedavi ihtiyacının ve ağız sağlığı ile ilgili yaşam kalitesinin (OHRQoL) belirlenmesi ve farklı malokluzyon gruplarında ortodontik tedavi ihtiyacının, OHRQoL üzerindeki etkisinin değerlendirilmesidir.
Bireyler ve Yöntem: Ortodontik tedavi görme isteği bulunan 11-15 yaş arası (kızlarda ort. 13.03 ± 1.93 yıl, erkeklerde ort. 12.66 ± 1.75 yıl) 261 çocuk (158 kız, 103 erkek) çalışmanın gerecini oluşturmuştur. Bireyler dental malokluzyonlarına göre Angle Sınıf I, Sınıf II ve Sınıf III olarak 3 gruba ayrıldı. Veri toplama araçları; Ortodontik Tedavi İhtiyacı Diş Sağlığı Bileşeni indeksi (IOTN-DHC), IOTN Estetik Bileşeni indeksi (IOTN-AC), Ağız sağlığı etki profili (Oral Health Impact Profile-14 (OHIP-14)) ve Klinik Muayene Veri Formudur. OHRQoL'yi ölçmek için OHIP-14 kullanıldı. IOTN-DHC ve IOTN-AC (ortodontist & kendi algısı) ise ortodontik tedavi gereksinimini belirlemek amacıyla kullanıldı. Veriler anketler, kişisel görüşmeler ve intraoral muayeneler yoluyla toplandı. Verilerin değerlendirilmesinde Mann Whitney U testi, Kruskal-Wallis testi ve Kendall tau-b korelasyon testi kullanıldı ve anlamlılık düzeyi P0.05). Malokluzyon grupları arasında OHRQoL ölçme verisi olan OHIP-14 skorları açısından anlamlı farklılık bulunmazken ortodontik tedavi gereksinimini belirten IOTN-DHC skorları Sınıf III malokluzyon grubunda anlamlı derecede yüksek olduğu bulundu (P
Introduction
The aim of this in vitro study was to evaluate the shear bond strength (SBS) and adhesive remnant index (ARI) scores of two different adhesive applications of aesthetic brackets produced from permanent crown material using 3D-printing technology.
Methods
Sixty maxillary premolar teeth extracted for orthodontic reasons were divided into two main groups according to the type of bracket (metal brackets n=30, 3D-printed brackets n=30) and further divided into two subgroups according to the type of adhesive (flowable composite, Tokuyama SuperLow; non-flowable composite; 3M Transbond XT). SBS and ARI score evaluations were conducted in the experimental and control subgroups (n=15). Statistical analysis was performed by a one-way analysis of variance, a post-hoc test, and Fisher’s exact test. Statistical significance was accepted as P < 0.05.
Results
The bond strength of the specimens was significantly affected by the type of composite and bracket type (P < 0.001). However, the SBS values were within or above the desired range for orthodontic treatment in all groups. The highest SBS value was obtained in the Metal Bracket-Transbond XT group (15.03 ± 6.66), while the lowest SBS value was observed in the 3D-Printed Bracket-Transbond XT group (7.91 ± 3.07). It was noted that of all materials evaluated, the most common non-enamel-damaging adhesive–cohesive fractures were in 3D-Printed Bracket Tokuyama SuperLow group (n=13).
Conclusions
It is recommended that 3D-printed orthodontic brackets have sufficient and acceptable SBS levels for clinical applications and bonding using non-flowable adhesives to produce high SBS values and using flowable adhesives generating high ARI scores.
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