Orthodontics and Orthodontology Commons^™

Inclusion Of The Mobility Impaired In Our Community: Ask First!, Jeffrey M. Heinz Dds, Msd

The Journal of the Michigan Dental Association

This DEI Series feature article provides a unique perspective on the inclusion of individuals with physical disabilities, focusing on mobility impairment, in the dental profession and community. The author, a paraplegic orthodontist, shares personal experiences and challenges, shedding light on the importance of considering physical disabilities in dental offices. Navigational difficulties in compliant yet wheelchair-unfriendly spaces are discussed, urging practitioners to have contingency plans. The article emphasizes the significance of etiquette in assisting individuals with disabilities, encouraging respectful communication and asking before offering help. Practical insights on dental chair usage and transfer assistance are provided, promoting a more inclusive environment …

Cbct Use In Orthodontic Residency Programs In Usa, Su Min Han

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background and Objectives: Cone beam computed tomography (CBCT) scans in dentistry have been up and coming forms of x-ray technology that allows cross-sectional images to form a comprehensive 3-dimensional representation of the mouth. While the typical use for CBCT imaging is reported to be for implant dentistry, there are many contexts in which it is indicated in orthodontics. There are various schools of thought regarding when CBCT is indicated for specific diagnosis of problems or general use in the collection of initial, progress and post-treatment orthodontic records. There are programs that follow the Radiology guidelines for taking CBCT scans10 and …

Passive Self-Ligating Brackets Vs. Conventional Brackets: Is There A Difference In The Transverse Dimension? A Systematic Review And Meta-Analysis, Justin Scott Tenbrook

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background and Objectives:

Self-ligating brackets have risen in popularity in clinical orthodontics, but many claims made by their manufacturers have been made without substantial evidence. Any differences among the bracket types are very small when consulting new peer reviewed literature testing their differences. Nevertheless, self-ligating brackets are still purported to be able to increase the dental transverse dimension more effectively than conventional brackets. In 2018, Yang et al. performed a systematic review on the transversal changes, space closure, and efficiency of conventional and self-ligating appliances. Since then, there were several clinical trials published in the literature comparing the mandibular arch …

Medicaid In The Orthodontic Community: Provider Trends And Perceptions, Miranda L. Fabrega

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background and Objectives: Medicaid is a federal and state insurance program aimed at helping economically disadvantaged individuals and families with gaining access to health care. Lack of provider participation in the Medicaid program leaves many Medicaid-eligible individuals with the inability to obtain certain medical services, such as orthodontic care. The objective of this study was to use an electronic survey to better understand the beliefs and behaviors of orthodontists in regard to participation in the Medicaid program, and to determine if differences exist between Medicaid providers and non-Medicaid providers. Experimental Design and Methods: Survey: Requests to participate in an electronic …

Effects Of The Orthodontic Miniscrew Geometric Design On The Bone Microdamage And Primary Stability, Panida Methawit

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study investigated the effects of the pitch (P) and thread shape on orthodontic miniscrew cortical bone microdamage. The relationship between microdamage and primary stability was examined. Ti6Al4V orthodontic miniscrews had custom-made thread heights (H) and pitch sizes and were classified into the following groups: HCPC (control); HCPN (with a narrower pitch); and HTPC (with a taller thread height) (HC = 0.12 mm; HT = 0.36 mm; PC = 0.60 mm; PN = 0.30 mm). The orthodontic miniscrews were inserted in the pilot hole of prepared 1.0-mm-thick tibia cortical bone, and the maximum insertion torque (MIT) and Periotest value (PTV) …

Expression Of Superoxide Dismutase 3 (Sod3) During Orthodontic Tooth Movement In Rats, Phanchanit Jindarojanakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Hypoxia induces reactive oxygen species (ROS) production in periodontal tissues. Superoxide dismutase 3 (SOD3) is an enzyme protecting cells from ROS. This study investigated SOD3 expression and function during rat orthodontic tooth movement (OTM) and in hypoxia-exposed rat PDL cells. OTM of right maxillary first molars were performed in Sprague-Dawley rats for 1 and 14 days (n = 6 per group). SOD3 and HIF-1α expression were evaluated by immunohistochemistry. SOD3 effects on cell viability and proliferation, ROS production, and mRNA expression of Hif-1α, Rankl, and Opg in PDL cells and osteoclast differentiation were investigated under normoxia and hypoxia. SOD3 expression …

The Effect Of Crowding On The Accuracy Of 3d Printed Aligners, Tonya Spangler

Theses and Dissertations

Purpose: To evaluate the accuracy of three-dimensionally (3D) printed aligners compared to conventional vacuum-formed thermoplastic aligners with varying levels of dental crowding.

Methods: Digital intraoral scans of 10 different cases were assigned to their respective groups (n=10, each, 30 total) as follows: no crowding (control), moderate crowding, and severe crowding. Using 3Shape software, digital aligner samples were created in standard tessellation language (STL) file format and randomly 3D printed. The same STL files of each case were also sent to a dental laboratory for the fabrication of vacuum-formed samples, which is the current technology used for manufacturing aligners. The intaglio …

Antibacterial And Antibiofilm Efficacy Of Pineapple Hump (Ananas Comosus) On Porphyromonas Gingivalis In Vitro, Abdul Gani Soulissa, Billy Lombardo, Armelia Sari Widyarman

Journal of Dentistry Indonesia

Background: Periodontal disease is one of the most prevalent oral health problems in Indonesia that affects supporting tissues of the teeth. Porphyromonas gingivalis plays an important role in the pathogenesis of periodontal disease. Alternative therapy with natural plant extracts, including pineapple (Ananas comosus) hump extract may inhibit the growth of bacteria that cause periodontal disease. Objective: To determine the effect of pineapple hump extract on bacterial growth and adhesion of Porphyromonas gingivalis biofilms. Method: The bacterial inhibition test was performed by the agar well diffusion method, and biofilm density measurements were made using the biofilm assay method. Results: Pineapple hump …

The Effect Of Parabiotic Reuterin On The Expression Of Genes Involved In Candida Albicans Biofilm Formation: An Ex Vivo Study, Anastasya Muna Riad, Armelia Sari Widyarman

Journal of Dentistry Indonesia

Candida albicans has a number of properties, including resistance to various antimicrobial agents, which allow it to survive in the root canals. Lactobacillus reuteri plays a role in maintaining oral health through interactions with the oral microbiome. L. reuteri has potential as a preventive and therapeutic agent against inflammatory diseases. Objective: The aim of this study was to investigate the effect of irrigation with a reuterin-containing solution on BCR1, ACE2, EFG1, and TEC1 gene expression in C. albicans root canal biofilms. Methods: L. reuteri was cultured in MRS broth and incubated anaerobically for 24 hours at 37°C. C. albicans was …

Effects Of Different Finishing Procedures On Surface Roughness Of Hybrid Cad/Cam Materials, Ender Akan, Ozlem Colgecen, Ibrahim Talha Meşe, Bora Bağiş

Journal of Dentistry Indonesia

Hybrid ceramics combine the beneficial properties of resin with the advantage of glass ceramics. However, there are limited study about on roughness properties of hybrid materials. Objective: To investigate of the effects of surface finishing methods on roughness of dental restorations made from hybrid CAD/CAM blocks. Methods: A total of 60 samples were produced (n=20) for three main material groups, two different hybrid ceramic (LAVA Ultimate and VITA Enamic) and a conventional glass ceramic (IPS e.max CAD). Each material group was divided into two subgroups (n=10). Ten samples were polished and 10 were glazed according to related manufacturer instructions. Surface …

The Effect Of Orthodontic Treatment With Extraction On The Upper Airway Dimensions And Three-Dimensional Morphology: A Retrospective Study Using Cone-Beam Computed Tomography Technique, Ehsan Mostaghni

Theses & Dissertations

The purpose of this study was to evaluate the effect of orthodontic treatment with and without extractions of teeth on the upper airway dimension and morphology. Records of 40 consecutively treated patients who received orthodontic treatment with or without dental extractions were evaluated. Pre-and post-treatment volumes, minimum cross-sectional areas, and linear dimensions of oropharyngeal airways were quantified using InVivo Dental 6.0 (Anatomage, San Jose, CA). Additionally, pre and post CBCT images of the upper airways were superimposed on each other using voxel-based registration and fixed coordinate system using 3D Slicer 4.1.1 (www.Slicer.org) and ITK-SNAP (http://www.itksnap.org). While the …

Characterization Of Aerosols Produced By Common Orthodontic Procedures, Anna R. Schoettger

Theses & Dissertations

Introduction: Aerosols can harbor active viruses, including SARS-CoV-2, making it vital that clinical protocols implemented in the orthodontic office be based on which procedures produce aerosols. Research shows that various procedures in the field of orthodontics generate aerosols, however, there is a lack of consensus as to which procedures should be deemed aerosol-generating procedures (AGPs). The current study aimed to better understand aerosol production of various orthodontic procedures. Methods: Orthodontic procedures were performed in a closed-room dental operatory on acrylic teeth mounted onto a dental manikin. Procedures performed included: debonding, bonding, and repositioning of one bracket. Variations introduced included: high-speed …

Alignment Of Cervical Vertebrae And Reliability Of Cephalometric Measurements, Ece Agirgol

Theses & Dissertations

Cervical vertebrae are in close relationship with dentofacial structures due to their anatomical position. In previous studies, the inclination of cervical vertebrae was measured by mostly Nasion-Sella line as the reference plane to evaluate the relationship with dentofacial structures.

The aim of this study is to observe the correlation between cervical vertebrae inclination and lateral cephalometric measurements. 124 lateral cephalograms taken in Natural Head Position of subjects over 18 years of age were traced with Dolphin Imaging Software 11.95 Premium. Cervical vertebrae inclination was measured by using the lines passing from landmarks on second, third and forth cervical vertebrae. Correlation …

A Comparison Of Traditional Orthodontic Polishing Systems With Composite Polishing Systems Following Orthodontic Debonding, Elizabeth A. Melvin, Qingzhao Yu, Xiaoming Xu, Camille G. Laird, Paul C. Armbruster, Richard W. Ballard

School of Public Health Faculty Publications

Introduction: At the completion of treatment, the orthodontic practitioner's goal is to effectively remove all traces of adhesive and return enamel to its initial state. With the advent of new polishing systems being released each year, there may be one product that is superior to others. Aim: The purpose of this study is to determine the efficacy of new polishing systems (in the last 5–10 years) used in general dentistry on enamel surface roughness following debond utilizing profilometery and scanning electron microscopy and compare them to established orthodontic polishing systems results. Methods: Fifty-two mandibular incisors were randomly assigned to one …

Noninvasive Orthodontic Treatment For Class Ii Division 2 Adult Patient With 100% Deep Bite By Continuous Wire Mechanism, Yu-Hui Huang, Chun-Liang Kuo, I-Hua Liu, Chun-Hsiu Yang, Chung-Li Wang

Taiwanese Journal of Orthodontics

A characteristic of Class II Division 2 malocclusion is severe deep overbite and lingual inclination of the incisors. Deep overbite can be corrected by intrusion of anterior teeth, extrusion of posterior teeth, or a combination of both. Intrusion of the incisors should be the preferred treatment in nongrowing patients with anterior deep bites.

The patient is a 21-year-old female who had a skeletal Class II, hypodivergent facial pattern, Class II division 2 malocclusion, crowding dentition and traumatic 100% deep overbite. We extracted the two upper first premolars to relieve crowding, and the mandibular crowding was resolved by aligning the lower …

Treatment Of A Class Ii Hyperdivergent Case With Progressive Condylar Resorption, In-Ru Lin, Meng-Yen Chen, Tung-Yiu Wong, Chen-Jung Chang

Taiwanese Journal of Orthodontics

Condylar resorption can be challenging to orthodontist when encountered during treatment. The clinical characteristics and cephalometric findings of a patient who experienced postoperative skeletal relapse caused by progressive condylar resorption (CR) are presented in this case report. The predisposing factors and treatment protocols of condylar resorption are also discussed. A 17-year-old female patient came to our hospital with chief complaint of no contact of anterior teeth. Cephalometric analysis shows that she is a patient with skeletal Class II hyper-divergent pattern caused by mandibular retrognathism. Flattened left condylar head was found on panoramic film suggesting possible condylar erosion in the past. …

Asymmetric Orthodontic Space Closure Of Unilateral Congenitally Missing Second Premolars, Weerayuth Vejwarakul, Yu-Chih Wang, Yuh-Jia Hsieh

Taiwanese Journal of Orthodontics

This case report presents successful orthodontic management of unilateral retained deciduous second molars and congenitally missing second premolars using an additional anchorage in conjunction with the segmented arch approach. A 21-year-old female patient presented as skeletal Class I malocclusion, mild crowding, straight facial profile, and orthodivergent facial pattern. The treatment plan was established to extract deciduous teeth and close the extraction space by molar protraction. A Nance appliance and lingual holding arch were used as an additional anchorage to maintain the facial profile and dental midline, with pure molar protraction performed using a segmented arch and sliding mechanics. After 1 …

Orthodontic Correction Of Insufficient Posterior Overjet With Microimplant-Assisted Rapid Palatal Expansion, Po-Yi Chen, Tai-Ting Lai, Kai-Wen Yu, Huey-Yuan Wang, Shih-Ying Lin

Taiwanese Journal of Orthodontics

Transverse maxillary deficiency is often characterized by insufficient posterior overjet or posterior cross bite and anterior crowding. However, arch expansion in adult patients has been considered to be problematic owing to its possible periodontal side effects, such as gingival recession and bone dehiscence. On the other hand, nonsurgical maxillary expansion of the palatal bone in young adults has been demonstrated to correct transverse maxillary deficiency. This report describes the case of an 18-year-old patient with mild transverse maxillary deficiency accompanied by crowding who underwent microimplant-assisted rapid palatal expansion (MARPE). Using microimplant-assisted rapid palatal expansion allowed relief of crowding and correction …

Comparing Outcomes And Stability After Single- And Two-Piece Lefort I Osteotomies In Patients With Cleft Lip And Palate, Chanin Jittithaworn, Chun-Shin Chang, Chiung Shing Huang, Cheng-Hui Lin, Ellen Wen-Ching Ko

Taiwanese Journal of Orthodontics

Purpose: LeFort I osteotomy is used to correct and improve the maxillary hypoplasia in secondary cleft deformities. However, surgical complex and challenge would be the risk factor of postsurgical instability. This study compared surgical and postsurgical changes in maxillary and mandibular movements and stability in patients with cleft lip and palate (CLP) who underwent single- or two-piece LeFort I osteotomies.

Materials and Methods: Forty-five patients with CLP were included, of whom 30 and 15 received single- and two-piece LeFort I osteotomies, respectively. Cone-beam computed tomography was administered at three time points (T0: presurgery; T1: <1-month postsurgery; and T2: ≥1-year postsurgery) to evaluate surgical (T1–T0) and postsurgical (T2–T1) changes in maxillary and mandibular movement and stability. The overall movement, arch width, and relapse rate were measured and compared between the groups. Potential factors influencing skeletal stability were surgical change, segmental maxilla, cleft types, age, sex, and prior alveolar bone graft placement were analyzed.

Results: There revealed a significant difference …

Is The Anb Norm In Tao Board Examination Appropriate? Meta-Analysis Of Taiwanese Cephalometric Norms, Ya-Lan Chan, Johnson Hsin-Chung Cheng, Pei-Hsuan Chen, Daniel De-Shing Chen

Taiwanese Journal of Orthodontics

Purpose: According to clinical experience, the ANB angle (A point, nasion, B point) norm value of Taiwan Association of Orthodontists (TAO) board examination seems to be larger than the Taiwanese population. Therefore, this study aimed to integrate studies of Taiwanese cephalometric norms by a meta-analysis.

Patients and Methods: Studies were searched from electronic database of PubMed, National Digital Library of Theses and Dissertations in Taiwan, and physical libraries. Ten measurement values were collected. According to age and gender, all samples were divided into three groups. A meta-analysis of the mean and standard deviation values in all groups was performed.

Results: …