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American Journal of Orthodontics and Dentofacial Orthopedics

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https://www.readbyqxmd.com/read/28457278/accuracy-of-a-computed-tomography-scanning-procedure-to-manufacture-digital-models
#1
Amir M Darroudi, Anne Marie Kuijpers-Jagtman, Edwin M Ongkosuwito, Christiaan Maarten Suttorp, Ewald M Bronkhorst, K Hero Breuning
INTRODUCTION: Accurate articulation of the digital dental casts is crucial in orthodontic diagnosis and treatment planning. We aimed to determine the accuracy of manufacturing digital dental casts from computed tomography scanning of plaster casts regarding linear dimensions and interarch relationships and to test whether eventual differences in interarch relationships between plaster and digital casts would affect orthodontic diagnostics. METHODS: Plaster casts with the wax bites of 2 patients were used to create digital dental casts with a computed tomography scanner...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457277/semipermanent-replacement-of-missing-maxillary-lateral-incisors-by-mini-implant-retained-pontics-a-follow-up-study
#2
Roberto Ciarlantini, Birte Melsen
Agenesis of maxillary lateral incisors can be treated either by closing the space and substituting the canines for the missing lateral incisors or, in adults, by replacing the missing teeth with fixed prosthetics or implants. This article illustrates a method that can be used for a semipermanent implant replacement of the missing incisors in adult patients. An Aarhus mini-implant was inserted perpendicular to the palatal mucosa of the alveolar process of the edentulous area. A pontic was made at chair side of composite material around a stainless steel wire extending from the mini-implant...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457276/nonsurgical-correction-using-miniscrew-assisted-vertical-control-of-a%C3%A2-severe-high-angle-with-mandibular-retrusion-and-gummy-smile-in-an-adult
#3
Xue-Dong Wang, Jie-Ni Zhang, Da-Wei Liu, Fei-Fei Lei, Wei-Tao Liu, Yang Song, Yan-Heng Zhou
Orthodontic treatment in adult patients with a skeletal discrepancy can be challenging. In this case report, we achieved both sagittal and vertical control by combining the classic sliding mechanics straight-wire technique with miniscrew anchorage. We treated a 21-year-old Chinese woman with a severe high mandibular plane angle, a retrusive chin, and a gummy smile. Her diagnosis included a skeletal Class II skull base with a mild anterior open bite, a protrusive maxilla, and a backwardly rotated mandible. This case underscores the importance of anchorage control in both the sagittal and vertical directions...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457275/nonsurgical-treatment-of-severe-class-ii-malocclusion-with-anterior-open-bite-using-mini-implants-and-maxillary-lateral-incisor-and-mandibular-first-molar-extractions
#4
Matheus Melo Pithon
This clinical case report presents the nonsurgical orthodontic treatment of a patient with skeletal Class II malocclusion, posterior crossbite, anterior open bite, accentuated dental discrepancies in both arches, and an odontoma. The proposed treatment involved maxillary expansion, extraction of atypical maxillary lateral incisors and mandibular first molars, and intrusion of maxillary teeth with the aid of mini-implants. The results obtained with these procedures included good tooth alignment, normal overbite and overjet, removal of the odontoma, and a harmonious smile...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457274/cytotoxic-outcomes-of-orthodontic-bands-with-and-without-silver-solder-in-different-cell-lineages
#5
Letícia Spinelli Jacoby, Valnês da Silva Rodrigues Junior, Maria Martha Campos, Luciane Macedo de Menezes
INTRODUCTION: The safety of orthodontic materials is a matter of high interest. In this study, we aimed to assess the in-vitro cytotoxicity of orthodontic band extracts, with and without silver solder, by comparing the viability outcomes of the HaCat keratinocytes, the fibroblastic cell lineages HGF and MRC-5, and the kidney epithelial Vero cells. METHODS: Sterilized orthodontic bands with and without silver solder joints were added to culture media (6 cm(2)/mL) and incubated for 24 hours at 37°C under continuous agitation...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457273/addition-of-ammonium-based-methacrylates-to-an-experimental-dental-adhesive-for-bonding-metal-brackets-carious-lesion-development-and-bond-strength-after-cariogenic-challenge
#6
Patrícia Layane de Menezes Macedo Nascimento, Carine Tais Welter Meereis, Tamires Timm Maske, Fabrício Aulo Ogliari, Maximiliano Sérgio Cenci, Carmem Sílvia Pfeifer, André Luis Faria-E-Silva
INTRODUCTION: In this study, we evaluated the caries inhibition and shear bond strength achieved with the addition of the antibacterial monomer [2-(Methacryloyloxy)ethyl] trimethylammonium chloride (MADQUAT) to an adhesive used to bond orthodontic brackets. METHODS: Experimental adhesives were formulated with addition of 0% (control), 5%, or 10% MADQUAT followed by measurement of the degree of conversion. These adhesives were used to lute brackets to the enamel of premolars (n = 30)...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457272/three-dimensional-upper-airway-changes-with-mandibular-advancement-device-in-patients-with-obstructive-sleep-apnea
#7
Chandrakant Shivkumar Shete, Wasundhara Ashok Bhad
INTRODUCTION: A mandibular advancement device effectively increases upper airway size in patients with obstructive sleep apnea. Three-dimensional volumetric upper airway changes, exact amounts of change in obstructed upper airways (smallest cross-sectional area), and anteroposterior and transverse changes with mandibular advancement devices are not clear. METHODS: Thirty-seven patients with obstructive sleep apnea diagnosed with polysomnography were evaluated with the subjective Epworth sleepiness scale, percentage of oxygen saturation, and cone-beam computed tomography...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457271/relationships-among-nasal-resistance-adenoids-tonsils-and-tongue-posture-and-maxillofacial-form-in-class-ii-and-class-iii-children
#8
Tomonori Iwasaki, Hideo Sato, Hokuto Suga, Yoshihiko Takemoto, Emi Inada, Issei Saitoh, Eriko Kakuno, Ryuzo Kanomi, Youichi Yamasaki
INTRODUCTION: The purpose of this study was to clarify the relationships between upper airway factors (nasal resistance, adenoids, tonsils, and tongue posture) and maxillofacial forms in Class II and III children. METHODS: Sixty-four subjects (mean age, 9.3 years) with malocclusion were divided into Class II and Class III groups by ANB angles. Nasal resistance was calculated using computational fluid dynamics from cone-beam computed tomography data. Adenoids, tonsils, and tongue posture were evaluated in the cone-beam computed tomography images...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457270/buccolingual-angulation-and-intermolar-width-changes-in-the-maxillary-first-molars-of-untreated-growing-children
#9
Lillelenny Santana, Melih Motro, Mohamed S Bamashmous, Alpdogan Kantarci, Leslie A Will
INTRODUCTION: Buccolingual inclinations of the maxillary permanent molars and intermolar widths increase with growth for Class I subjects. Changes for untreated Class II subjects have not yet been assessed. The aim of this study was to test the hypothesis that changes in palatal inclination of the maxillary molars and intermolar width throughout growth vary between Class I and Class II molar occlusions. METHODS: Patients were selected from the Forsyth/Moorrees Twin Study...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457269/longitudinal-cephalometric-growth-of-untreated-subjects-with-class-ii-division-2-malocclusion
#10
Luiz A G Barbosa, Eustaquio Araujo, Rolf G Behrents, Peter H Buschang
INTRODUCTION: Our objective was to evaluate the craniofacial growth of subjects with untreated Class II Division 2 malocclusion. METHODS: A mixed longitudinal sample of 39 white Class II Division 2 subjects was analyzed at 5 time points: T1 (6 or 7 years), T2 (9 or 10 years), T3 (12 or 13 years), T4 (15 or 16 years), and T5 (18 or 19 years). They were compared with an age- and sex- matched sample of Class I controls. Seventeen measurements (12 angular, 5 proportional) were computed...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457268/movement-of-mandibular-molar-into-edentulous-alveolar-ridge-a-cone-beam-computed-tomography-study
#11
Patrícia Bittencourt Dutra Dos Santos, Francyle Simões Herrera Sanches, Marcos Cezar Ferreira, Ana Lúcia Pompéia Fraga de Almeida, Guilherme Janson, Daniela Garib
INTRODUCTION: The purpose of this study was to evaluate the thickness and height of buccal and lingual alveolar bone of mandibular teeth moved to edentulous areas with a remodeled alveolar ridge. METHODS: The sample included 18 adult patients with unilateral or bilateral absence of mandibular permanent first molars with a mean age of 36.1 years before treatment. The mandibular hemiarches were divided into 3 groups: reopening group (15 hemiarches), closure group (12 hemiarches), and control group (9 hemiarches with no missing teeth)...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457267/cervical-vertebral-maturation-an%C3%A2-objective-and-transparent-code-staging-system-applied-to-a-6-year-longitudinal-investigation
#12
Giuseppe Perinetti, Alberto Bianchet, Lorenzo Franchi, Luca Contardo
INTRODUCTION: To date, little information is available regarding individual cervical vertebral maturation (CVM) morphologic changes. Moreover, contrasting results regarding the repeatability of the CVM method call for the use of objective and transparent reporting procedures. In this study, we used a rigorous morphometric objective CVM code staging system, called the "CVM code" that was applied to a 6-year longitudinal circumpubertal analysis of individual CVM morphologic changes to find cases outside the reported norms and analyze individual maturation processes...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457266/effects-of-monocortical-and-bicortical-mini-implant-anchorage-on-bone-borne-palatal-expansion-using-finite-element-analysis
#13
Robert J Lee, Won Moon, Christine Hong
INTRODUCTION: Bone-borne palatal expansion relies on mini-implant stability for successful orthopedic expansion. The large magnitude of applied force experienced by mini-implants during bone-borne expansion may lead to high failure rates. Use of bicortical mini-implant anchorage rather than monocortical anchorage may improve mini-implant stability. The aims of this study were to analyze and compare the effects of bicortical and monocortical anchorages on stress distribution and displacement during bone-borne palatal expansion using finite element analysis...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457265/anatomic-landmarks-and-availability-of-bone-for-placement-of-orthodontic-mini-implants-for-normal-and-short-maxillary-body-lengths
#14
Jan Hourfar, Dirk Bister, Christopher J Lux, Bouthayna Al-Tamimi, Björn Ludwig
INTRODUCTION: Increasing numbers of orthodontic mini-implants are placed in the anterior maxilla. To our knowledge, bone levels and root proximity of patients with cephalometrically short maxillae have not been investigated before. The first, second, and third rugae were used as clinical reference lines, and the aim of this study was to measure bone availability in that area by comparing patients with short and normal maxillary body lengths. METHODS: The sample consisted of 21 patients in each group: short maxillary body length and normal maxillary body length...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457264/mesial-and-distal-alveolar-bone-morphology-in-maxillary-canines-moved-into-the-grafted-alveolar-cleft-computed-tomography-evaluation
#15
Daniela Garib, Camila Massaro, Marilia Yatabe, Guilherme Janson, José Roberto P Lauris
INTRODUCTION: The aims of this study were to qualitatively assess the mesial and distal alveolar bone of maxillary canines mesially moved to replace absent lateral incisors in patients with unilateral cleft lip and palate after secondary alveolar bone graft and to assess the reproducibility of the proposed cone-beam computed tomography (CBCT) method. METHODS: The sample comprised CBCT examinations of 30 patients with unilateral cleft lip and palate from 1 center...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457263/survival-of-labial-inversely-impacted-maxillary-central-incisors-a-retrospective-cone-beam-computed-tomography-2-year-follow-up
#16
Han Hu, Rongdang Hu, Huixi Jiang, Zhensheng Cao, Hao Sun, Chenrui Jin, Chaofan Sun, Yu Fang
INTRODUCTION: The aim of this study was to analyze the development and stability of roots and alveolar bone in orthodontically treated labial inversely impacted maxillary central incisors in a long-term follow-up by cone-beam computed tomography. Comparisons were made between the labial inversely impacted maxillary central incisors after treatment and normally erupted mature contralateral incisors. METHODS: The sample consisted of 12 participants, with a mean age of 7...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457262/prevalence-of-gingival-recession-after-orthodontic-tooth-movements
#17
Jason W Morris, Phillip M Campbell, Larry P Tadlock, Jimmy Boley, Peter H Buschang
INTRODUCTION: This study was designed to evaluate the long-term prevalence of gingival recession after orthodontic tooth movements, focusing on the effects of mandibular incisor proclination and expansion of maxillary posterior teeth. METHODS: Records of 205 patients (162 female, 43 male) were obtained from 2 private practice orthodontists. Using pretreatment (age, 14.0 ± 5.9 years) and posttreatment (age, 16.5 ± 6.0 years) lateral cephalograms and dental models, mandibular incisor proclination and maxillary arch widths were measured...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457261/evaluation-of-objective-structured-clinical-examination-for-advanced-orthodontic-education-12%C3%A2-years-after-introduction
#18
Henry W Fields, Do-Gyoon Kim, Minjeong Jeon, Allen R Firestone, Zongyang Sun, Shiva Shanker, Ana M Mercado, Toru Deguchi, Katherine W L Vig
INTRODUCTION: Advanced education programs in orthodontics must ensure student competency in clinical skills. An objective structure clinical examination has been used in 1 program for over a decade. The results were analyzed cross-sectionally and longitudinally to provide insights regarding the achievement of competency, student growth, question difficulty, question discrimination, and question predictive ability. METHODS: In this study, we analyzed 218 (82 first-year, 68 second-year, and 68 third-year classes) scores of each station from 85 orthodontic students...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457260/your-brother-s-gatekeeper
#19
EDITORIAL
Peter M Greco
No abstract text is available yet for this article.
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28457259/correction
#20
(no author information available yet)
No abstract text is available yet for this article.
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
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