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Progress in Orthodontics

Dani Abo Samra, Rania Hadad
BACKGROUND: To investigate the relationship between the morphological maturation stages of the midpalatal suture and its bone densities. METHODS: The sample consisted of 91 subjects aged 8-18 years who underwent cone beam computed tomography. All images were examined to classify morphological maturation of the midpalatal suture to five groups according to Angelieri et al. Bone density of the midpalatal suture was measured at the maxillary and palatal regions. Kruskal-Wallis and Mann-Whitney U tests were used to analyze the difference between groups...
August 13, 2018: Progress in Orthodontics
Bassant A Abbas, Eiman S Marzouk, Abbas R Zaher
BACKGROUND: This study was conducted to evaluate the efficiency of resin infiltration to improve the color of white spot lesions (WSLs) and to estimate the effect of different numbers of etching and resin infiltrant applications on the color change of WSLs with various depths. Ninety-six sound extracted premolars were subjected to acid attack inducing different depths of WSLs. Using a DIAGNOdent, teeth were divided into four main groups according to the depth of the WSLs: shallow enamel, deep enamel, shallow dentine, and deep dentine without cavitation...
August 6, 2018: Progress in Orthodontics
Sara Eslami, Jorge Faber, Ali Fateh, Farnaz Sheikholaemmeh, Vincenzo Grassia, Abdolreza Jamilian
BACKGROUND: One of the most controversial issues in treatment planning of class III malocclusion patients is the choice between orthodontic camouflage and orthognathic surgery. Our aim was to delineate diagnostic measures in borderline class III cases for choosing proper treatment. METHODS: The pretreatment lateral cephalograms of 65 patients exhibiting moderate skeletal class III were analyzed. The camouflage group comprised of 36 patients with the mean age of 23...
August 2, 2018: Progress in Orthodontics
Iosif Sifakakis, William Papaioannou, Aikaterini Papadimitriou, Dimitrios Kloukos, Spyridon N Papageorgiou, Theodore Eliades
BACKGROUND: Fixed orthodontic appliances might be associated with intraoral adverse effects on enamel, due to plaque accumulation and their colonization by oral microbes. At the same time, the demand for esthetic alternatives to orthodontic treatment, like thermoplastic aligners, is growing. However, thermoplastic aligners may behave differently intraorally than fixed appliances in terms of bacterial colonization and biofilm formation. Therefore, the aim of this prospective cohort study was to assess the salivary prevalence of the cariogenic bacteria Streptococcus mutans, Lactobacillus acidophilus, and Streptococcus sanguinis among adolescents treated orthodontically with thermoplastic aligners or fixed appliances...
August 1, 2018: Progress in Orthodontics
Daniele Manfredini, Luca Lombardo, Letizia Vigiani, Angela Arreghini, Giuseppe Siciliani
BACKGROUND: This study aims to evaluate if invisible orthodontic retainers can affect sleep-time masticatory muscle activity (sMMA) over a short-term period in healthy individuals. METHODS: Nineteen (N = 19) healthy subjects underwent an in-home evaluation with a portable device for electromyographic (EMG) assessment. The study protocol provided two baseline recording nights, a night off, and then two additional nights with passive customized orthodontic retainers in situ...
July 23, 2018: Progress in Orthodontics
Giuseppina Laganà, Nicolò Venza, Roberta Lione, Carlo Chiaramonte, Carlotta Danesi, Paola Cozza
BACKGROUND: The aim of present study was to test the association between hypodontia and displaced maxillary canine when compared with a control group. METHODS: The study group was composed of 336 subjects with a mean age of 10.7 ± 1.2 years, presenting with at least one missing tooth. Exclusion criteria included syndromes, craniofacial malformations, extractions and trauma history and previous orthodontic treatment. The control group consisted of 336 subjects with a mean age of 10...
July 20, 2018: Progress in Orthodontics
Hsiu-Ching Ko, Weitao Liu, Derek Hou, Sepideh Torkan, Charles Spiekerman, Greg J Huang
BACKGROUND: Clear aligner therapy has evolved considerably since its introduction 20 years ago. Clinicians have become more experienced with aligner therapy, but little is known about the types of malocclusions that clinicians currently treat with aligners. Similarly, it is not known if viewing digital vs plaster models has any impact on the treatment planning process for aligners. The aim of this study was to assess which types of malocclusions are recommended for treatment with clear aligners, and also to determine if recommendations for aligner treatment differed when using digital versus plaster models...
July 19, 2018: Progress in Orthodontics
Giorgio Cacciatore, Laura Poletti, Chiarella Sforza
BACKGROUND: The aetiology of the canine displacement still remains controversial. Some authors implicated a deficiency in maxillary width as a local mechanical cause for impacted canines. The aim of the study was to examine whether there is a relationship between impacted maxillary canines, early diagnosed by using panoramic radiographs, and the morphology of the maxilla on 3D model casts. METHODS: The displaced maxillary canines (DMC) group consisted of 24 patients (mean age, 9...
July 16, 2018: Progress in Orthodontics
Roberta Lione, Valerio Brunelli, Lorenzo Franchi, Chiara Pavoni, Bernardo Quiroga Souki, Paola Cozza
In the publication of this article (1) there is an error in the Methods section.
July 12, 2018: Progress in Orthodontics
Francesca Gazzani, Chiara Pavoni, Aldo Giancotti, Paola Cozza, Roberta Lione
BACKGROUND: To evaluate load and stress distribution on Delaire facemask (FM) during maxillary protraction in class III growing patients by means of finite element analysis (FEA). A three-dimensional geometry of a Delaire FM was reconstructed from the original CAD 3D prototype, using software package (ANSYS 5.7). FM presented forehead and chin supports and stainless steel framework characterized by two lateral vertical bars connected to a crossbar with two pawls for elastic attachment...
July 9, 2018: Progress in Orthodontics
Karla C Horta, Guido A Marañón-Vásquez, Mírian A N Matsumoto, Marília R Moreira, Fábio L Romano, Alberto Consolaro, Israel D de Souza, Tamires A V Brigante, Maria E C Queiroz, Paulo Nelson-Filho, Erika C Küchler
BACKGROUND: Bisphenol A (BPA) is released from orthodontic composites used for bracket bonding. Genetic variations could modify the metabolism of this chemical within the organism. Considering that free BPA binds to estrogen receptors causing harmful effects to health, the present in vivo study aimed to evaluate the association between genetic polymorphisms in genes encoding estrogen receptors (ESR1 and ESR2) and excreted BPA levels in orthodontic patients. METHODS: Quantification of BPA levels in the urine of 16 patients was performed in a gas chromatograph mass spectrometer before (T0), at 24 h (T1), and 1 week (T2) after bracket bonding...
July 2, 2018: Progress in Orthodontics
Amarjot Singh, Gurveen Gill, Harsimrat Kaur, Mohamed Amhmed, Harpal Jakhu
In this review, most of the known and postulated mechanisms of osteopontin (OPN) and its role in bone remodeling and orthodontic tooth movement are discussed based on available literature. OPN, a multifunctional protein, is considered crucial for bone remodeling, biomineralization, and periodontal remodeling during mechanical tension and stress (orthodontic tooth movement). It contributes to bone remodeling by promoting osteoclastogenesis and osteoclast activity through CD44- and αvβ3-mediated cell signaling...
June 25, 2018: Progress in Orthodontics
Michele Tepedino, Lorenzo Franchi, Omar Fabbro, Claudio Chimenti
BACKGROUND: The present systematic review was carried out to determine the correlation between gingival recession/bone height and incisor inclination in non-growing post-orthodontic patients compared to adult untreated subjects or patients treated with different methodologies. MATERIALS AND METHODS: PubMed, EMBASE, Web of Science, Scopus, Cochrane, and OpenGrey databases were searched without time and language restriction. Search terms included orthodontic, incisor, inclination, angulation, proclination, and gingival...
June 18, 2018: Progress in Orthodontics
D Al-Moghrabi, A Tsichlaki, N Pandis, P S Fleming
BACKGROUND: To assess patterns of research collaboration in orthodontics and possible relationships with sample size and funding status. METHODS: Orthodontic randomised and non-randomised controlled clinical trials published between 2013 and 2017 were identified through electronic searching. The nature of collaboration, author institutions, study setting, sample size, and funding status were assessed. Linear and logistic regression analyses were applied. RESULTS: Of 1153 studies, 217 met the selection criteria...
June 11, 2018: Progress in Orthodontics
Robert J Lee, Sarah Pi, Justyn Park, Gerald Nelson, David Hatcher, Snehlata Oberoi
BACKGROUND: Accurate root position is integral for successful orthodontic treatment. Current methods of monitoring root position are either inaccurate, exhibit poor resolution, or use relatively large amount of radiation relative to the benefits for the patient. The purpose of this study was to present an approach that can monitor root position during orthodontic treatment with minimal radiation. METHODS: Cone-beam computed tomography (CBCT) scans were taken for a patient at pre-treatment and at a dedicated reset appointment...
June 4, 2018: Progress in Orthodontics
Ajay Chacko, Tripti Tikku, Rohit Khanna, Rana Pratap Maurya, Kamna Srivastava
BACKGROUND: Retraction in lingual orthodontics has biomechanical differences when compared to labial orthodontics, which is not yet established. Thus, we have intended to compare the biomechanical characteristics of closed helical loop and T-loop on 1 mm activation with 30° of compensatory curvatures during retraction in lingual orthodontics. METHODS: STb lingual brackets were indirectly bonded to maxillary typhodont model that was scanned to obtain FEM model...
May 28, 2018: Progress in Orthodontics
Hassan E Kassem, Eiman S Marzouk
BACKGROUND: Prediction of the treatment outcome of various orthodontic procedures is an essential part of treatment planning. Using skeletal anchorage for intrusion of posterior teeth is a relatively novel procedure for the treatment of anterior open bite in long-faced subjects. METHODS: Data were analyzed from lateral cephalometric radiographs of a cohort of 28 open bite adult subjects treated with intrusion of the maxillary posterior segment with zygomatic miniplate anchorage...
May 14, 2018: Progress in Orthodontics
Alexis Ioannidis, Spyridon N Papageorgiou, Iosif Sifakakis, Spiros Zinelis, George Eliades, Theodore Eliades
BACKGROUND: The purpose of the study is to investigate the effect of the bonding procedure on the mechanical properties of human enamel. METHODS: A total of 20 extracted human premolars were included in this study, with the half of each tooth acting as its own internal control. Embedded and horizontally cut specimens were prepared, and two bucco-orally zones were separated. The first enamel zone of each tooth remained untreated. The opposing zone was subjected to simulated bonding and debonding, including etching with 37% phosphoric acid, bonding with primer and flowable composite resin, and subsequent removal of the composite with an adhesive removal bur...
May 7, 2018: Progress in Orthodontics
Isabela Vasconcelos Barbosa, Victor de Miranda Ladewig, Renata Rodrigues Almeida-Pedrin, Mauricio Almeida Cardoso, Joel Ferreira Santiago Junior, Ana Claudia de Castro Ferreira Conti
BACKGROUND: An efficient orthodontic treatment must aim the best occlusal result in the shortest possible time. One of the factors that can interfere in this goal is the bracket debonding during the treatment. This study aimed at assessing the different factors related to brackets failure, highlighting age and patient cooperation with treatment. METHODS: The sample comprised 199 orthodontic patients of both genders (103 women and 96 men); divided into two groups-adolescents (12 to 18 years old, 118 patients) and adults (19 to 59 years old, 81 patients)...
May 1, 2018: Progress in Orthodontics
Mohammed Mahmood Jawad Alazzawi, Adam Husein, Mohammad Khursheed Alam, Rozita Hassan, Rumaizi Shaari, Ahmad Azlina, M S Salzihan
BACKGROUND: Quality bone regeneration, which leads to the improvement of bone remodeling, is essential for orthodontic treatment. In order to improve bone regeneration and increase the amount of tooth movement, different techniques have been implemented. The object of this study is to compare the effects of low-level laser therapy (LLLT), low-intensity pulsed ultrasound (LIPUS), and their combination on bone remodeling during orthodontic tooth movement. METHODS: Eighty (80) male, 6-week-old Sprague Dawley rats were grouped in to four groups, the first group was irradiated with (940 nm) diode laser, second group with LIPUS, and third group with combination of both LLLT and LIPUS...
April 16, 2018: Progress in Orthodontics
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