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American Journal of Orthodontics and Dentofacial Orthopedics

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https://www.readbyqxmd.com/read/28863925/survival-analysis-part-1-introduction
#1
EDITORIAL
Despina Koletsi, Nikolaos Pandis
No abstract text is available yet for this article.
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863924/immunity-from-what
#2
EDITORIAL
Laurance Jerrold
No abstract text is available yet for this article.
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863923/accuracy-of-3-dimensional-curvilinear-measurements-on-digital-models-with-intraoral-scanners
#3
Spencer Mack, Tammy Bonilla, Jeryl D English, Benjamin Cozad, Sercan Akyalcin
INTRODUCTION: Our objectives were to evaluate and compare the digital dental models generated from 2 commercial intraoral scanners with manual measurements when performing 3-dimensional surface measurements along a curved line (curvilinear). METHODS: Dry mandibles (n = 61) with intact dentition were used. The mandibles were digitized using 2 chair-side intraoral scanners: Cadent iTero (Align Technology, San Jose, Calif) and Lythos Digital Impression system (Ormco, Orange, Calif)...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863922/miniscrew-biomechanics-guidelines-for-the-use-of-rigid-indirect-anchorage-mechanics
#4
Sebastian Baumgaertel, Clark L Jones, Mustafa Unal
Indirect anchorage is an established form of anchorage provided by orthodontic miniscrews. Although there are different ways to set up the mechanics, rigid indirect anchorage offers the greatest biomechanical versatility but is more difficult to install than conventional, nonrigid indirect anchorage or direct anchorage. The purpose of this article was to introduce readers to the concept of rigid indirect anchorage and provide guidelines as to its use.
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863921/fixed-functional-appliance-treatment-combined-with-growth-hormone-therapy
#5
Min-Ho Jung
The purpose of this study was to illustrate the effects of growth hormone (GH) therapy and fixed functional appliance treatment in a 13-year-old Class II malocclusion patient without GH deficiency. GH has been shown to effectively increase endochondral growth and induce a more prognathic skeletal pattern. Although a major concern in Class II retrognathic patients is chin deficiency, long-term studies have shown that the mandibular growth enhancement effects of functional appliances are clinically insignificant...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863920/combined-orthodontic-orthopedic-treatment-of-an-adolescent-class-ii-division-2-patient-with-extreme-deepbite-using-the-forsus-fatigue-resistant-device
#6
Mehmet Bayram
Class II Division 2 malocclusion is often characterized by severe, traumatic deepbite with lingually inclined and overerupted incisors. Combined orthodontic-orthopedic treatment of this malocclusion is a challenging issue for orthodontists. This case report describes the combined orthodontic-orthopedic treatment of an adolescent Class II Division 2 patient with an extreme deepbite and a retrognathic mandible using the Forsus Fatigue Resistant Device.
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863919/genome-wide-association-study-for-mandibular-prognathism-using-microsatellite-and-pooled-dna-method
#7
Fumio Saito, Takashi S Kajii, Akira Oka, Keiichiro Ikuno, Junichiro Iida
INTRODUCTION: The purpose of this study was to extend an association study from chromosome 1 to the whole genome (genome-wide association study) to find susceptibility loci of mandibular prognathism. METHODS: Two hundred forty patients diagnosed with mandibular prognathism and 360 healthy controls of Japanese descent were recruited. The typing of microsatellites covering the whole genome was conducted using a pooled DNA method. Upon completion of the first and second screenings with pooled DNA, the positive microsatellite markers from both the first and second typings were retyped using individual-subject DNA samples to confirm the significance of allele frequency...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863918/three-dimensional-evaluation-of-the-airway-spaces-in-patients-with-and-without-cleft-lip-and-palate-a-digital-volume-tomographic-study
#8
Himija Karia, Sunita Shrivastav, Ashok Kumar Karia
INTRODUCTION: Patients with cleft lip and palate (CLP) suffer from several esthetic and functional challenges. Comprehensive treatment of these patients involves orthognathic surgery that may lead to velopharyngeal insufficiency or reduction in lower airway. Several cases of airway insufficiency, velopharyngeal incompetence, snoring, hypopnea, and obstructive sleep apnea have been reported in subjects with CLP. The aim of this study was to compare the anteroposterior dimensions of the oropharyngeal airway at 5 levels, the height of the oropharyngeal column, and the volume of the oropharyngeal airway in subjects with and without CLP...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863917/assessment-of-upper-airway-size-after-orthopedic-treatment-for-maxillary-protrusion-or-mandibular-retrusion
#9
Muge Aksu, Hande Gorucu-Coskuner, Tulin Taner
INTRODUCTION: The aim of this retrospective study was to find out whether different Class II treatments would affect the airway sizes of patients having maxillary protrusion or mandibular retrusion. METHODS: The study sample comprised 57 Class II patients whose upper airway sizes were not significantly different at the start of treatment and whose sagittal skeletal jaw relationships showed that they had maxillary protrusion or mandibular retrusion. Twenty-two of them were treated with cervical headgear, 16 with activator, and 19 were selected as a control...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863916/a-simple-and-accurate-craniofacial-midsagittal-plane-definition
#10
Moshe Noam Green, Jonathan Michael Bloom, Richard Kulbersh
INTRODUCTION: In this article, we aimed to establish an ideal definition for the craniofacial midsagittal plane (MSP) by first finding an optimal "plane of best fit" and then deriving a simple approximation for clinical use that is highly accurate. METHODS: For 60 adolescent patients, 3-dimensional coordinates of 8 central landmarks and 6 pairs of lateral landmarks were collected. Across all patients, the coplanarity of the central landmarks was compared with that of the midpoints of the lateral landmarks...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863915/root-resorptions-associated-with-canine-retraction-treatment
#11
Feifei Jiang, Jie Chen, Katherine Kula, Huiying Gu, Yansheng Du, George Eckert
INTRODUCTION: The hypothesis of this study was that multiple factors are dominant in causing external apical root resorption (EARR). The objective of this investigation was to better understand the clinical factors that may lead to EARR. METHODS: Maxillary cone-beam computed tomography scans of 18 subjects who were treated with bilateral canine retractions during orthodontics were used to calculate EARR. The subjects were treated using well-calibrated segmental T-loops for delivering a 124-cN retraction force and the moment-to-force ratio suitable for moving the canine under either translation or controlled tipping...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863914/three-dimensional-assessment-of-soft-tissue-changes-associated-with-bone-anchored-maxillary-protraction-protocols
#12
Mohammed H Elnagar, Eman Elshourbagy, Safaa Ghobashy, Mohamed Khedr, Budi Kusnoto, Carla A Evans
INTRODUCTION: The aim of this study was to assess the 3-dimensional soft tissue changes in growing Class III patients with maxillary deficiency associated with 2 bone-anchored maxillary protraction protocols in relation to an untreated control group of Class III patients. METHODS: Growing skeletal Class III patients between the ages of 10 and 14 years participated in this study. In group 1 (n = 10), skeletally anchored facemasks were used with miniplates placed at the zygomatic buttress...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863913/bone-anchored-maxillary-protraction-therapy-in-patients-with-unilateral-complete-cleft-lip-and-palate-3-dimensional-assessment-of-maxillary-effects
#13
Marília Yatabe, Daniela Gamba Garib, Renato André de Souza Faco, Hugo de Clerck, Guilherme Janson, Tung Nguyen, Lucia Helena Soares Cevidanes, Antonio Carlos Ruellas
INTRODUCTION: The aim of this study was to 3-dimensionally assess the treatment outcomes of bone-anchored maxillary protraction (BAMP) in patients with unilateral cleft lip and palate. METHODS: The cleft group comprised 24 patients with unilateral cleft lip and palate and Class III malocclusion with mean initial and final ages of 11.8 and 13.2 years, respectively. The noncleft group comprised 24 noncleft patients with Class III malocclusion with mean initial and final ages of 11...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863912/prevalence-of-extraction-space-reopening-in-different-orthodontic-treatment-protocols
#14
Guilherme Janson, Danilo Pinelli Valarelli, Mayara Rizzo, Fabrício Pinelli Valarelli
INTRODUCTION: In this study, we aimed to compare the amount and frequency of extraction space reopening after 2- and 4-premolar extraction treatments in Class II and 4-premolar extractions in Class I malocclusion patients. METHODS: The sample comprised 105 subjects with full-cusp Class II and Class I malocclusions, divided into 3 groups. Group 1 consisted of 33 full-cusp Class II malocclusion patients treated with a 2-premolar extraction protocol. Group 2 had 34 full-cusp Class II malocclusion patients treated with 4-premolar extractions, and group 3 included 38 Class I malocclusion patients treated with 4-premolar extractions...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863911/quantitative-analysis-of-enamel-on-debonded-orthodontic-brackets
#15
Nathan J Cochrane, Thomas W G Lo, Geoffrey G Adams, Paul M Schneider
INTRODUCTION: Iatrogenic damage to the tooth surface in the form of enamel tearouts can occur during removal of fixed orthodontic appliances. The aim of this study was to assess debonded metal and ceramic brackets attached with a variety of bonding materials to determine how frequently this type of damage occurs. METHODS: Eighty-one patients close to finishing fixed orthodontic treatment were recruited. They had metal brackets bonded with composite resin and a 2-step etch-and-bond technique or ceramic brackets bonded with composite resin and a 2-step etch-and- bond technique, and composite resin with a self-etching primer or resin-modified glass ionomer cement...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863910/influence-of-cortical-bone-thickness-on-miniscrew-microcrack-formation
#16
Melissa V Nguyen, John Codrington, Lloyd Fletcher, Craig W Dreyer, Wayne J Sampson
INTRODUCTION: The aim of this in-vitro study was to investigate the influence of cortical bone thickness on the amount of surface microdamage produced after insertion of orthodontic miniscrews (OM) in porcine tibia bone. METHODS: Aarhus OMs (Medicon, Tuttlingen, Germany; diameter, 1.5 mm; length, 6 mm) were inserted into 1.0 mm (group A; n = 10), 1.5 mm (group B; n = 10), and 2.0 mm (group C; n = 10) of porcine cortical bone using a torque-limiting hand screwdriver set at 18 Ncm...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863909/the-proof-is-in-the-pudding
#17
EDITORIAL
Peter M Greco
No abstract text is available yet for this article.
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863908/residents-journal-review
#18
Dan Grauer
No abstract text is available yet for this article.
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863907/authors-response
#19
LETTER
Li Mei, Richard D Cannon, Lydia Meredith, Sam Lowrey, Mauro Farella
No abstract text is available yet for this article.
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28863906/atomic-force-microscopy-analysis-of-enamel-nanotopography-after-interproximal-reduction
#20
LETTER
Shadi Mohebi, Nazila Ameli
No abstract text is available yet for this article.
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
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