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Angle Orthodontist

Ana Zilda Nazar Bergamo, Katharina Morant Holanda de Oliveira, Mírian Aiko Nakane Matsumoto, Cássio do Nascimento, Fábio Lourenço Romano, Raquel Assed Bezerra da Silva, Lea Assed Bezerra da Silva, Paulo Nelson-Filho
OBJECTIVES: To assess periodontal parameters and microbial species levels after orthodontic appliance placement in patients who received oral hygiene instructions and who were monitored and motivated throughout the study. MATERIALS AND METHODS: The Periodontal Index was recorded and saliva collection was performed before (T0) and 30 (T1), 60 (T2), and 90 (T3) days after orthodontic appliance placement in 15 patients (mean age 17.53 ± 8.0 years). Analysis was carried out using checkerboard DNA-DNA hybridization...
September 21, 2018: Angle Orthodontist
Fernando C Brito, Daniel P Brunetto, Matilde C G Nojima
OBJECTIVES: To characterize upper airway volume and morphology in patients with different skeletal patterns of Class II malocclusion compared to Class I. MATERIALS AND METHODS: A total of 197 individuals who had cone-beam computed tomography were allocated into groups according to ANB, SNA, and SNB angles (Class I, Class II maxillary protrusion, Class II mandibular retrusion), each subdivided into hypodivergent, normal, and hyperdivergent. Nasopharynx (NP), oropharynx (OP), and hypopharynx (HP) were assessed with three-dimensional image reconstruction software...
September 19, 2018: Angle Orthodontist
Mhd Hassan Albogha, Ichiro Takahashi
OBJECTIVES: To describe the relationship between the proximity of miniscrew implants (MSIs) to the periodontal ligament (PDL) and stress in the PDL under different load magnitudes and different bone properties. MATERIALS AND METHODS: Sixteen subject-specific finite element models of the region of the maxillary first molar and second premolar were developed using computed tomography images of four patients. For each patient, an MSI surface model derived from micro-computed tomography was placed at four different distances from the premolar PDL...
September 19, 2018: Angle Orthodontist
Natália Maria Vieira Barbosa, Ana Cláudia de Castro Ferreira Conti, Leopoldino Capelozza-Filho, Renata Rodrigues de Almeida-Pedrin, Mauricio de Almeida Cardoso
OBJECTIVES: To assess reliability and reproducibility of the individual assessment of midpalatal suture maturation in computed tomography among orthodontists and radiologists for potential diagnosis application. MATERIALS AND METHODS: Sixty axial slices from cone-beam computed tomography and multi-slice CT scans of patients aged between 11 and 21 years old (33 females and 27 males) were selected. For the investigation of reliability and reproducibility of the method, two groups of examiners were established...
September 19, 2018: Angle Orthodontist
Thorsten Grünheid, Brent E Larson
OBJECTIVES: To compare bracket survival and adhesive removal time between a flash-free and a conventional adhesive for orthodontic bracket bonding. MATERIALS AND METHODS: Forty-five consecutive patients had their maxillary incisors, canines, and premolars bonded with ceramic brackets using a flash-free adhesive (APC Flash-Free Adhesive, 3M Unitek, Monrovia, Calif) on one side and a conventional adhesive (APCII Adhesive, 3M Unitek) on the other side. The side allocation was randomized...
September 19, 2018: Angle Orthodontist
Huan Tang, Ikuo Yonemitsu, Yuhei Ikeda, Kenzo Watakabe, Shunichi Shibata, Jun Hosomichi, Ono Takashi
OBJECTIVES: Mouth breathing caused by nasal obstruction (owing to abnormal pressure of masticatory muscles) affects craniofacial growth and development. The influence of unilateral nasal obstruction on jaw-closing muscles was investigated in rats to reveal one of the etiologic mechanisms. MATERIALS AND METHODS: Forty 8-day-old male Wistar rats were used in this study. Experimental rats were subjected to left-sided nasal obstruction by burning the external nostril tissue at the age of 8 days...
September 17, 2018: Angle Orthodontist
Kelly W Choi, Hsiu-Ching Ko, Lauren S Todoki, Samuel A Finkleman, Roozbeh Khosravi, Hsuan-Fang Wang, Ellen Funkhouser, Camille Baltuck, Vishnu Raj, Veerasathpurush Allareddy, John C Matunas, Michael E Vermette, William E Harrell, Jorge C Coro, Geoffrey M Greenlee, Greg J Huang, National Dental Pbrn Collaborative Group
OBJECTIVES: To describe the demographic and practice characteristics of the clinicians enrolled in a large, prospective cohort study examining recommendations and treatment for adult anterior open bite (AOB) and the relationship between these characteristics and practitioners' self-reported treatment preferences. The characteristics of the AOB patients recruited were also described. MATERIALS AND METHODS: Practitioners were recruited from the National Dental Practice-Based Research Network...
September 12, 2018: Angle Orthodontist
Moufida Abufarwa, Amal Noureldin, Phillip M Campbell, Peter H Buschang
OBJECTIVES: To test how long casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) fluoride varnish prevents enamel demineralization in vitro. MATERIALS AND METHODS: Human molars and premolars were sectioned buccolingually and randomly assigned to two groups. Standardized pretreatment images of enamel surfaces were obtained using FluoreCam. The control group received no treatment, and the experimental group received an application of CPP-ACP fluoride varnish...
September 12, 2018: Angle Orthodontist
Wentian Sun, Kai Xia, Li Tang, Chenlu Liu, Ling Zou, Jun Liu
OBJECTIVE: To investigate the accuracy of panoramic radiography (PR) in diagnosing maxillary sinus-root relationships (SRRs). MATERIALS AND METHODS: PubMed, EMBASE, CENTRAL, Web of Science, ScienceDirect, CBM, Baidu Scholar, and SIGLE were searched. The studies comparing the diagnostic accuracy of PR and computed tomography/cone-beam computed tomography (CT/CBCT) for SRR were included. RESULTS: Eleven studies were included. Meta-analyses showed that, for type I SRR, PR had the highest specificity, positive likelihood ratio (+LR), diagnostic odds ratio (DOR), and area under the curve (AUC), with a high sensitivity and a low negative LR (-LR)...
September 4, 2018: Angle Orthodontist
Yasuhiko Oga, Hiroshi Tomonari, Sangho Kwon, Takaharu Kuninori, Takakazu Yagi, Shouichi Miyawaki
OBJECTIVE: To clarify the in vivo effect of an automatic embedding device on miniscrew stability. MATERIALS AND METHODS: 42 miniscrews were implanted into rabbit femurs. The miniscrews with the novel auxiliary device formed the auxiliary group (n = 11 at 4 weeks; n = 11 at 8 weeks) and the miniscrews without the auxiliary device formed the nonauxiliary control group (n = 9 at 4 weeks; n = 11 at 8 weeks). Cortical bone thickness, distance from the cortical bone surface to the miniscrew head, and implantation depth of the spike were measured using micro-computed tomography...
September 1, 2018: Angle Orthodontist
Matthew P Gidaly, Timothy Tremont, Chee Paul Lin, Chung How Kau, Nada M Souccar
OBJECTIVES: To determine an optimal anteroposterior (AP) position of the maxillary central incisors and their relationship to the forehead in adult African American (AA) females. MATERIALS AND METHODS: Smile profile photographs of 150 AA females were acquired and divided into an optimal control group (N = 48) and a study group (N = 102) based on the position of the maxillary central incisors, as judged by a panel of orthodontists and orthodontic residents. The AP position of the maxillary central incisors and the forehead inclination (FI) were measured relative to Glabella vertical (GV)...
September 1, 2018: Angle Orthodontist
Nesrine Z Mostafa, Anthony P G McCullagh, David B Kennedy
This case report describes orthodontic space closure for managing an avulsed maxillary central incisor and a lateral incisor in a growing girl with a Class I deep bite malocclusion with moderate lower and mild upper crowding. The treatment approach moved a central incisor across the midline and substituted a lateral incisor for a central incisor, in combination with canine substitution. Veneers on all maxillary anterior teeth attained acceptable esthetics. The right central incisor was moved to serve as the avulsed left central incisor...
August 24, 2018: Angle Orthodontist
Nurhat Ozkalayci, Ersan Ilsay Karadeniz, Selma Elekdag-Turk, Tamer Turk, Lam L Cheng, M Ali Darendeliler
OBJECTIVES: To compare the extent of root resorption and the amount of tooth movement between continuous orthodontic force and intermittent orthodontic force that was activated in a similar way to a 4-week orthodontic adjustment period. MATERIALS AND METHODS: Twenty-five patients who required the extraction of upper first premolars were recruited in this study. A buccally directed continuous force of 150 g was applied to the upper first premolar on one side for 15 weeks...
August 20, 2018: Angle Orthodontist
Kyoung-Won Kim, Sung-Jin Kim, Ji-Yeon Lee, Yoon-Jeong Choi, Chooryung J Chung, Hyunsun Lim, Kyung-Ho Kim
OBJECTIVES: To identify risk factors for apical root resorption (ARR) of maxillary and mandibular incisors using mathematical quantification of apical root displacement (ARD) and multiple linear mixed-effects modeling. MATERIALS AND METHODS: Periapical radiographs of maxillary and mandibular incisors and lateral cephalograms of 135 adults were taken before and after orthodontic treatment. ARR was measured on the periapical radiographs, and movement of central incisors was evaluated on the superimposed pre- and posttreatment lateral cephalograms...
August 20, 2018: Angle Orthodontist
Matthew Silver, Alfred C Griffin, Lauren Azzopardi, Mohammed I Masoud, Oluwabunmi Tokede, Alfred C Griffin
OBJECTIVES: To validate a novel method for measuring the clinically relevant bracket slot and use these methods to test the hypothesis that various metal injection molded (MIM) and esthetic ceramic injection molded (CIM) brackets have a bracket slot accuracy within 1 mil (0.001") of their reported slot dimension. MATERIALS AND METHODS: A Nikon iNEXIV-VMA-2520 laser microscope was used to measure slots of six series of CIM brackets and two series of MIM brackets via a vision measuring system of 256 gray levels to capture each edge of the slot, largely taking out human subjectivity...
August 20, 2018: Angle Orthodontist
Tung Nguyen, Eui Seon Baek, Soonshin Hwang, Kyung-Ho Kim, Chooryung J Chung
This report illustrates the successful nonsurgical and nonprosthetic camouflage treatment of a skeletal Class II open bite malocclusion combined with missing mandibular first molars bilaterally. In the mandible, the second and third molars were uprighted and protracted, substituting for the missing first molars. In the maxilla, anterior bodily retraction and full-arch intrusion were achieved following premolar and second molar extraction, which also induced autorotation of the mandible. The treatment outcome and prognosis were confirmed with three-dimensional superimposition techniques, along with long-term stability...
August 20, 2018: Angle Orthodontist
Julia Naoumova, Gabriel Edgardo Alfaro, Sheldon Peck
OBJECTIVES: To assess palatal vault height, tooth size, and dental arch dimensions in patients with unilateral and bilateral palatally displaced canines compared with a control group. MATERIALS AND METHODS: A sample of 66 patients (mean age: 11.5 ± 1.0 years) with 22 unilateral palatally displaced canines (UPDCs), 22 bilateral palatally displaced canines (BPDCs), and 22 controls (C) were consecutively recruited. All three groups had dental casts that were scanned digitally using the OrthoX three-dimensional model scanner...
August 13, 2018: Angle Orthodontist
Michael H Bertl, Andrea Foltin, Stefan Lettner, Katharina Giannis, André Gahleitner, Hans-Peter Bantleon, Georg D Strbac
OBJECTIVES: To evaluate association and causation between maxillary lateral incisors' (MxI2) apical root volume (ARV) and palatally displaced canines (PDC). MATERIALS AND METHODS: In a retrospective cross-sectional study, computed tomography scans of 179 patients with unilateral PDC were analyzed. MxI2 root length and volume on the impaction and eruption side were measured. A mixed logit model was used to infer the association between ARV and PDC and an instrumental variables approach to interpret causality...
August 13, 2018: Angle Orthodontist
Beatriz Tarazona, Rut Lucas-Dominguez, Vanessa Paredes-Gallardo, Adolfo Alonso-Arroyo, Antonio Vidal-Infer
OBJECTIVES: To identify and analyze the 100 most-cited articles in orthodontics indexed in the Web of Science Category of "Dental, Oral Surgery and Medicine" from 1946 to 2016. MATERIALS AND METHODS: On hundred articles were identified in a search of the database of the ISI Web of Science and Journal Citation Reports, applying the truncated search term "orthodon*." Records were manually refined and normalized to unify terms and to remove typographical, transcription, and/or indexing errors...
August 13, 2018: Angle Orthodontist
Tugce Celenk-Koca, Aslihan Ertan Erdinc, Serpil Hazar, Lacey Harris, Jeryl D English, Sercan Akyalcin
OBJECTIVES: To evaluate and compare the dental and skeletal changes with conventional and miniscrew-supported maxillary expansion appliances in adolescents. MATERIALS AND METHODS: Forty patients were divided into two groups, with one group receiving a tooth-borne expander and the other group receiving an expander supported by four miniscrews (bone-borne). Multiplanar coronal and axial slices obtained from cone-beam computed tomography images were used to measure the changes in transverse skeletal widths, buccal bone thickness, tooth inclination, and root length...
August 13, 2018: Angle Orthodontist
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