Effects of aging on the tensile strength and surface condition of orthodontic aligners: a comparative study of five models.

Background/objective: The objective of this study is to determine the effect of aging on tensile strength and surface condition of orthodontic aligners on days 0, 1, 5, 7, 10, and 14.

Materials/methods: The total sample of 80 aligners included five brands (Accusmile®, Angel®, GRAPHY®, Invisalign® and Suresmile®) were placed in a thermocycler to imitate the temperature variations of the oral cavity and accelerate aging for 50, 250, 350, 500, and 700 cycles. The mechanical tensile properties (Young's modulus E, yield strength YS, maximum elastic stress MES, Ultimate Tensile Strength UTS, and maximum stress MS) were measured by Universal Testing Machine at a rate of 5 mm of deformation per minute for 4 minutes.

Evaluation of orthodontists' experience with the surgery first protocol in orthodontic-surgical management.

Aim Of The Study: The aim of this study was to analyze the popularity of surgery first among orthodontists as well as the protocols used for its implementation and to collect the opinions (favorable or unfavorable) of practitioners and patients regarding it.

Materials And Methods: A questionnaire was sent to a population of dental surgeons qualified in Dentofacial Orthopedics or in the process of specialization (residents) practicing in France. The questionnaire consisted of a total of 27 questions.

Evaluation of orthodontic habits regarding the use of miniplates in the correction of Skeletal Class III.

Aims: To determine the habits of Orthodontists in the management of moderate skeletal class III patients by using miniplates, and to assess the relationship between the factors that may hinder the implementation of such treatment.

Material And Methods: A questionnaire was carried out using the Google Form® platform, which included 18 questions relating to the seniority of the practice of the orthodontists, the preferential treatment, the difficulties encountered, the results obtained, and the frequency of a relapse.

Results: Experienced orthodontists (more than 10 years) treated skeletal class III malocclusion with the conventional facemask therapy, whereas orthodontists with less than 5 years of experience shifted to the miniplate technique which presented less dental effect and more skeletal correction with a decreased frequency of relapse.

Microhardness and Chemical Composition of Different Metallic Brackets: An Study.

The purpose of the study is to compare the hardness of different metallic brackets to enamel and to determine their chemical composition and microstructure. Five metallic brackets (0.022″ × 0.

What is the current state of artificial intelligence applications in dentistry and orthodontics?

Background: The use of Artificial Intelligence (AI) in the medical field has the potential to bring about significant improvements in patient care and outcomes. AI is being used in dentistry and more specifically in orthodontics through the development of diagnostic imaging tools, the development of treatment planning tools, and the development of robotic surgery. The aim of this study is to present the latest emerging AI softwares and applications in dental field to benefit from.

The curve of Spee and its levelling in different vertical skeletal patterns: A 3D set-up study.

Objectives: Primary: to compare intra-arch measurements [Curve Of Spee (COS) depth, space required to level the COS (δ), uprighting angles of 1st and 2nd lower molars (αM1 & αM2), respectively] between different vertical skeletal patterns. Secondary: to explore the relationship between those measurements in each vertical skeletal pattern.

Methods: 90 Plaster models were scanned and transformed into digital models using 3Shape Ortho System™ intra oral scanner.