Does crown, root, and bone visualization in a clear aligner virtual setup impact treatment decisions?

Introduction: Clear aligner technology based on a machine learning algorithm is currently available for orthodontic treatment. Treatment planning on the basis of 3-dimensional crown, root, and bone imaging is claimed to provide accurate diagnosis and better treatment outcomes for adult patients with complex needs. This study aimed to answer the following questions: (1) would practitioners modify their original treatment plan once provided with the crown, root, and bone view? and (2) does practitioner satisfaction regarding treatment outcomes change once the crown, root, and bone view is provided?

Methods: An online questionnaire was emailed to members of the American Association of Orthodontists (n = 2300) and the Virginia Orthodontic Education and Research Foundation (n = 211).

The effect of crowding on the accuracy of 3-dimensional printing.

Introduction: The purpose of this study was to evaluate the accuracy of 3-dimensional (3D) printed aligners compared to conventional vacuum-formed thermoplastic aligners with varying levels of dental crowding.

Methods: Digital intraoral scans of 10 cases were assigned to their respective groups (n = 10, each, 30 total) as follows: no crowding (control), moderate crowding, and severe crowding. Digital images of these models were created in standard tessellation language (STL) file format using 3Shape software and randomly 3D printed.

White spot lesions in orthodontics: consensus statements for prevention and management.

Objective: To establish consensus recommendations for clinicians to manage white spot lesions (WSLs) during orthodontic treatment.

Materials And Methods: Three task force members reviewed the literature to identify best practices for minimizing WSLs during orthodontic treatment. Each draft statement was read to the task force members by a facilitator, followed by voting, accepting, or editing if necessary.

Comparison of 3-dimensional printing technologies on the precision, trueness, and accuracy of printed retainers.

Introduction: This study aimed to evaluate the differences in the precision, trueness, and accuracy of 3-dimensional (3D) printed clear orthodontic retainers fabricated using printer systems with different printing technologies.

Methods: Retainers (n = 15) were 3D printed using 4 different printers: stereolithography (SLA), digital light processing (DLP), continuous DLP, and polyjet photopolymer (PPP) printers. Printed retainers were transformed into a digital image through a cone-beam computed tomography scan and compared with the original image using 3D superimposition analysis software.

Effect of print angulation on the accuracy and precision of 3D-printed orthodontic retainers.

Introduction: The study aimed to (1) compare the accuracy and precision of 3-dimensional (3D) printed retainers at various angulations and (2) evaluate the effect of angulation on printing time and the amount of resin consumed.

Methods: Using a stereolithography 3D printer, 60 clear retainers were printed at 5 angulations (n = 12, each): 15°, 30°, 45°, 60°, and 90°. Samples for each group were randomly printed in a batch of 6 retainers at all print angulations as print 1 and print 2 cycles.

ICP-MS measurements of elemental release from two palladium alloys into a corrosion testing medium for different solution volumes and agitation conditions.

Statement Of Problem: The in vivo release of Pd from palladium alloys into the oral environment and sensitivity reactions by patients has been of concern. However, little information is available about the variation in elemental release from different palladium alloys.

Purpose: The purpose of this in vitro study was to compare the elemental release into a corrosion-testing medium from a high-palladium alloy (Freedom Plus, 78Pd-8Cu-5Ga-6In-2Au) and a Pd-Ag alloy (Super Star, 60Pd-28Ag-6In-5Sn) under different conditions.

COVID-19: What do we know?

• Evidence regarding the provision of orthodontic care during the COVID-19 pandemic is examined.

Recognition of the Asymmetrical Smile: A Comparison of Orthodontists, Oral and Maxillofacial Surgeons, and Laypersons.

Purpose: Studies have shown that an asymmetrical smile is a relatively common problem. Yet, many patients are unaware of having this condition. Because having an asymmetrical smile can affect the final esthetic result of orthodontic therapy or orthognathic surgery, such patients need to be aware of the problem.

Evaluation of fit for 3D-printed retainers compared with thermoform retainers.

Introduction: In the literature, there is little information available on 3D-printed orthodontic retainers. This study examined the accuracy of 3D-printed retainers compared with conventional vacuum-formed and commercially available vacuum-formed retainers.

Methods: Three reference models (models 1, 2, and 3) were used to fabricate traditional vacuum-formed, commercially available vacuum-formed, and 3D-printed retainers.

Accuracy of a smartphone-based orthodontic treatment-monitoring application: .

Objectives: To investigate the reliability and accuracy of a monitoring system in patients undergoing orthodontic treatment with a rapid maxillary expander. Specifically, the amount of tooth movement calculated by the software was compared with the actual measurements taken on plaster models obtained during an in-office visit.

Materials And Methods: Patients took intraoral video scans using the monitoring software's smartphone application (Dental Monitoring, Paris, France), immediately followed by impressions for plaster models.

Upper Lip Asymmetry During Smiling: An Analysis Using Three-Dimensional Images.

Objective: The aim of this study was to use three-dimensional images to determine the presence of upper lip asymmetry at rest and during smiling in a group of individuals with no history of orthodontics or facial cosmetic surgery.

Methods: Standardized three-dimensional frontal resting and smiling images of 54 volunteers were analyzed using the 3dMDvultus software (3dMD, Atlanta, GA). Measurements were made from the soft tissue nasion, ipsilateral ala, subnasale, and menton to the right and left commissures of the lip.

Comparison of intraoral and extraoral scanners on the accuracy of digital model articulation.

Unlabelled: Digital dental technology is increasingly becoming an integral part of the modern orthodontic practice. The accuracy of digitally articulated models is critical when developing orthodontic treatment plans.

Objective: to determine the accuracy of model articulation generated by extraoral and intraoral scanners.

Evaluation of staining and color changes of a resin infiltration system.

Objective: To analyze the staining and color changes of a resin infiltrant system used for management of white spot lesions (WSLs).

Materials And Methods: WSLs were artificially created on left buccal halves of 48 extracted human teeth. These sites were then treated with resin infiltration (RI) while the right halves of the teeth remained as nonresin (NRI) areas.

Color Properties of Demineralized Enamel Surfaces Treated with a Resin Infiltration System.

Objective: To assess color properties of white spot lesions (WSLs) following resin infiltration treatment in vitro.

Materials And Method: WSLs were artificially created on 30 extracted human teeth. Two groups were formed: (a) control, and (b) resin infiltrant group (n = 15, each).

Current trends in headgear use for the treatment of Class II malocclusions.

Objective: To investigate American and Canadian orthodontists' opinions and perceptions on the use of headgear in the treatment of Class II malocclusions.

Materials And Methods: An online survey was sent to randomly chosen orthodontists (n  =  1000).

Results: The study was completed by 948 orthodontists; 62% of the orthodontists indicated that they were using headgear in their practice.

Efficacy of a fluoride-releasing orthodontic primer in reducing demineralization around brackets: an in-vivo study.

Introduction: A new, highly filled primer is currently marketed as a fluoride delivery system effective in reducing white spot lesions in orthodontic patients. However, no studies in the literature support this claim. The purpose of this in-vivo study was to investigate the retention and the efficacy of this primer in reducing the formation of white spot lesions.

Parents' preferences regarding appearance and attire of orthodontists.

Objective: To evaluate parents' preferences regarding the appearance and attire of orthodontists.

Materials And Methods: Parents attending their child's first orthodontic appointment were asked to choose from among sets of photographs of potential orthodontic providers. Selected factors were varied within the sets, including sex and age of the provider as well as attire (casual, formal, white coat, or scrubs), hairstyle (loose or tied back for women, facial hair or clean shaven for men), and presence of a nametag.

A novel biomimetic orthodontic bonding agent helps prevent white spot lesions adjacent to brackets.

Objective: To compare changes in enamel microhardness adjacent to orthodontic brackets after using bonding agents containing various compositions of bioactive glass compared to a traditional resin adhesive following a simulated caries challenge.

Materials And Methods: Extracted human third molars (n  =  10 per group) had orthodontic brackets bonded using one of four novel bioactive glass (BAG)-containing orthodontic bonding agents (BAG-Bonds) or commercially available Transbond-XT. The four new adhesives contained BAG in varying percentages incorporated into a traditional resin monomer mixture.

Preventing and treating white-spot lesions associated with orthodontic treatment: a survey of general dentists and orthodontists.

Background: The authors investigated the prevention and treatment of white-spot lesions (WSLs) during and after orthodontic therapy from the perspective of general dentists and orthodontists.

Methods: The authors administered a cross-sectional survey to general dentists (n = 191) and orthodontists (n = 305) in Virginia, Maryland and North Carolina.

Results: Sixty-nine percent of general dentists and 76 percent of orthodontists recommended in-office fluoride treatment for patients with severe WSLs immediately after orthodontic treatment.

Self-ligating vs conventional brackets as perceived by orthodontists.

Objective: To determine if there are significant clinical differences between self-ligating brackets (SLB) and conventional brackets (CB) during orthodontic treatment, as perceived by orthodontists.

Materials And Methods: A survey was developed and distributed to evaluate how SLB compare to CB in terms of orthodontists' perceptions (n  =  430).

Results: SLB were preferred during the initial stage of treatment based on the shorter adjustment appointments and faster initial treatment progress they provided (P < .

Development of white spot lesions during orthodontic treatment: perceptions of patients, parents, orthodontists, and general dentists.

Introduction: Despite the many advances to improve the practice of orthodontics, white spot lesions, or decalcifications, remain a common complication in patients with poor oral hygiene. The purpose of this study was to assess the perceptions and level of awareness of patients, parents, orthodontists, and general dentists toward the development of white spot lesions during orthodontic treatment.

Methods: This was a prospective epidemiologic survey of the perceptions of orthodontic patients (n = 315), parents (n = 279), orthodontists (n = 305), and general dentists (n = 191) regarding the significance, prevention, and treatment of white spot lesions.

Perceptions of soft tissue laser use in orthodontics.

Objectives: To compare attitudes of orthodontists, periodontists, and general dentists regarding the use of soft tissue lasers by orthodontists during the course of orthodontic treatment.

Materials And Methods: An analogous survey was developed to evaluate and compare the current opinions of a representative sample (n  =  538) of orthodontists (61.3%), periodontists (24.

Ion release from a novel orthodontic resin bonding agent for the reduction and/or prevention of white spot lesions. An in vitro study.

Objective: To measure ion release from four sol-gel bioactive glass-containing orthodontic resin bonding agents (BAG-Bonds) following immersion into simulated body fluid (SBF) at pH values of 4 and 7.

Materials And Methods: Four BAG-Bonds, two containing fluoride, were developed. Prepared in our laboratory, the BAG-Bonds were composed of a mixture of resin monomers and bioactive glasses (BAGs).

Influence of dental esthetics on social perceptions of adolescents judged by peers.

Introduction: The relationship between physical appearance and social attractiveness is well established in the literature. The purpose of this study was to determine whether dental esthetics influenced the perceptions of teens when judging a peer's athletic, social, leadership, and academic abilities.

Methods: The frontal-face smiling photographs of 10 teenage volunteers were each altered to create 1 image with an ideal arrangement of teeth and 1 with a nonideal arrangement.