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Journal of Orthodontic Science

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https://www.readbyqxmd.com/read/27843888/age-and-gender-related-incisor-changes-in-different-vertical-craniofacial-relationships
#1
Amal I Linjawi
OBJECTIVE: To investigate the age- and gender-related changes in upper and lower incisors' position and inclination in different vertical craniofacial relationships. MATERIALS AND METHODS: A retrospective study on patients' records of age 8-48 years. The sample was divided based on Frankfort mandibular plane angle into three groups; normal, high, and low angle groups. It was then subdivided according to age. Upper and lower incisors' inclinations and positions were assessed from lateral cephalometric radiographs...
October 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27843887/comparative-evaluation-and-influence-on-shear-bond-strength-of-incorporating-silver-zinc-oxide-and-titanium-dioxide-nanoparticles-in-orthodontic-adhesive
#2
Aileni Kaladhar Reddy, Prabhuraj B Kambalyal, Santosh R Patil, Mallikarjun Vankhre, Mohammed Yaser Ahmed Khan, Thamtam Ramana Kumar
OBJECTIVE: To investigate the influence of silver (Ag), zinc oxide (ZnO), and titanium dioxide (TiO2) nanoparticles on shear bond strength (SBS). MATERIALS AND METHODS: One hundred and twenty extracted premolars divided into four groups with thirty specimens in each group. Group 1 (control): brackets (American Orthodontics) were bonded with Transbond XT primer. Groups 2, 3, and 4: brackets (American Orthodontics) were bonded with adhesives incorporated with Ag, ZnO, and TiO2 nanoparticles in the concentration of 1...
October 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27843886/fluoride-influences-nickel-titanium-orthodontic-wires-surface-texture-and-friction-resistance
#3
Mona Aly Abbassy
OBJECTIVES: The aim of this study was to investigate the effects exerted by the acidulated fluoride gel on stainless steel and nickel-titanium (Ni-Ti) orthodontic wires. MATERIALS AND METHODS: Sixty stainless steel and Ni-Ti orthodontic archwires were distributed into forty archwires used for in vitro study and twenty for in situ study. Fluoride was applied for 1 h in the in vitro experiment while it was applied for 5 min in the in situ experiment. The friction resistance of all wires with ceramic brackets before/after topical fluoride application was measured using a universal testing machine at 1 min intervals of moving wire...
October 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27843885/distortion-of-digital-panoramic-radiographs-used-for-implant-site-assessment
#4
Rayyan Abdulhamid Kayal
AIMS: This study is conducted to determine the amount of distortion of digital panoramic radiographs. MATERIALS AND METHODS: Panoramic radiographs of all patients who received dental implants in the years 2012 and 2013 were selected from the records at the faculty of dentistry, King Abdulaziz University. Radiographs were analyzed using the R4 Kodak Software for linear measurements of implants length and width. The measurements were compared to the actual size of the implant, and the amount of distortion was calculated...
October 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27843884/effects-of-intraoral-aging-of-arch-wires-on-frictional-forces-an-ex-vivo-study
#5
Avinash Kumar, Arifa Khanam, Hajra Ghafoor
INTRODUCTION: Archwires act as gears to move teeth with light, continuous forces. However, the intraoral use of orthodontic archwires is liable to surface deposits which alter the mechanical properties of archwires, causing an increase in the friction coefficient. OBJECTIVES: To evaluate the surface changes of the stainless steel archwires after 6 weeks of intraoral use and its influence on frictional resistance during sliding mechanics. MATERIALS AND METHODS: As-received rectangular 0...
October 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27556023/long-term-stability-of-conservative-orthodontic-treatment-in-a-patient-with-temporomandibular-joint-disorder
#6
Silvia Naomi Mitsui, Akihiro Yasue, Shingo Kuroda, Eiji Tanaka
This article reports the orthodontic treatment of a 20-year-old patient with dental crowding and temporomandibular joint disorders (TMDs). The patient presented moderate anterior crowding with a Class I molar relationship and masticatory disturbance in the mandibular position induced by previous splint therapy. Orthodontic treatment with multi-bracket appliance was initiated to correct the anterior crowding in both dental arches, after the extraction of first premolars and third molars, and also to maintain the splint-induced position of the condyles...
July 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27556022/mandibular-incisor-extraction-treatment-in-angle-s-class-i-malocclusion-with-peg-shaped-maxillary-lateral-incisors
#7
Ankit H Shah, Darshit H Shah
Accurate diagnosis and treatment planning are essential for obtaining ideal treatment result in cases involving mandibular incisor extraction. This case report describes a 15-year-old female with balanced soft-tissue profile, peg-shaped maxillary lateral incisors, and moderate mandibular anterior crowding treated with a mandibular incisor extraction. Ideal overbite and overjet were achieved. "Black triangle" formation was avoided due to the bodily movement of mandibular incisors and the use of uprighting springs for ideal axial inclination of mandibular incisors...
July 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27556021/a-comparative-evaluation-of-skeletal-dental-and-soft-tissue-changes-with-skeletal-anchored-and-conventional-facemask-protraction-therapy
#8
Tulika Tripathi, Priyank Rai, Navneet Singh, Shilpa Kalra
OBJECTIVE: To cephalometrically evaluate and compare the skeletal, dentoalveolar, and soft tissue changes after maxillary protraction with skeletally anchored and conventional facemask. METHODS: The data for the study were collected from the pre- and post-treatment records of patients of maxillary retrusion treated with skeletally anchored and conventional facemask therapy. Twenty subjects were included in the study and were categorized into two groups, namely skeletal anchored maxillary protraction (SAMP) group with the mean age of 10...
July 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27556020/effects-of-adhesion-promoter-on-orthodontic-bonding-in-fluorosed-teeth-a-scanning-electron-microscopy-study
#9
Aditi Gaur, Sandhya Maheshwari, Sanjeev Kumar Verma, Mohd Tariq
INTRODUCTION: The objectives of the present study were to elucidate the effects of fluorosis in orthodontic bonding and to evaluate the efficiency of an adhesion promoter (Assure Universal Bonding Resin) in bonding to fluorosed teeth. MATERIALS AND METHODS: Extracted premolars were divided into two groups on the basis of Thylstrup and Fejerskov Index. Ten samples from each group were etched and evaluated for etching patterns using scanning electron microscope (SEM)...
July 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27556019/malocclusion-and-early-orthodontic-treatment-requirements-in-the-mixed-dentitions-of-a-population-of-nigerian-children
#10
Oluranti Olatokunbo daCosta, Elfleda Angelina Aikins, Gerald Ikenna Isiekwe, Virginia Efunyemi Adediran
INTRODUCTION: The aims of this study were to establish the prevalence of dental features that indicate a need for early intervention and to ascertain the prevalence of different methods of early treatment among a population of Nigerian children in mixed dentition. METHODS: Occlusal relationships were evaluated in 101 children in mixed dentition between the ages of 6 and 12 years who presented at the Orthodontic Unit, Department of Child Dental Health, Lagos University Teaching Hospital over a 2 years period...
July 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27127755/surgical-orthodontic-correction-of-mandibular-laterognathism
#11
Harpreet Singh, Dhirendra Srivastava, Pranav Kapoor, Poonam Sharma
This case report describes the successful treatment of a patient with mandibular laterognathism and associated facial asymmetry with combined surgical orthodontic approach. After 7 months of presurgical orthodontic treatment, intraoral vertical ramus osteotomy, and straightening genioplasty were performed as two step surgeries to reposition the deviated mandible and chin, respectively. The total active treatment period was 14 months. After surgical orthodontic treatment, significant improvement in occlusion, masticatory function, and facial appearance was discernible...
April 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27127754/the-effect-of-dietary-pigmentation-on-the-esthetic-appearance-of-clear-orthodontic-elastomeric-modules
#12
Nabeel F Talic, Abdullazez A Almudhi
OBJECTIVE: To compare the stain resistance of three types of clear elastomeric modules exposed to several common dietary substances through the assessment of the perception of a group of dentists to discoloration using visual analog scale (VAS). MATERIALS AND METHODS: Elastomeric modules from Unitek (AU), Ormco (OR), and dentaurum (DE) were immersed in the following food substances: Coffee, black tea, chocolate, energy drink, ketchup, and Coca-Cola for 72 h. VAS was used to reflect the module staining severity...
April 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27127753/stress-distributions-of-a-bracket-type-orthodontic-miniscrew-and-the-surrounding-bone-under-moment-loadings-three-dimensional-finite-element-analysis
#13
Shabnam Ajami, Ahmad Mina, Seyed Amin Nabavizadeh
OBJECTIVES: To evaluate the effect of moments and the combination of forces and moments on the mechanical properties of a bracket type miniscrew, resembling engagement of a rectangular wire by three-dimensional (3D) finite element study. MATERIALS AND METHODS: By solid work software (Dassaunlt systems solid works, concord, Mass), a 3D miniscrew model of 6, 8, 10 mm lengths was designed and inserted in the osseous block, consisted of the cortical, and cancellous bones...
April 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27127752/the-facial-aesthetic-index-an-additional-tool-for-assessing-treatment-need
#14
Shobha Sundareswaran, Ranjith Ramakrishnan
OBJECTIVES: Facial Aesthetics, a major consideration in orthodontic diagnosis and treatment planning, may not be judged correctly and completely by simply analyzing dental occlusion or osseous structures. Despite this importance, there is no index to guarantee availability of treatment or prioritize patients based on their soft tissue treatment needs. Individuals having well-aligned teeth but unaesthetic convex profiles do not get included for treatment as per current malocclusion indices...
April 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27127751/comparative-evaluation-of-pentraxin-3-levels-in-gcf-during-canine-retraction-with-active-tieback-and-niti-coil-spring-an-in-vivo-study
#15
Pratik Patel, Ravi Shanthraj, A Bhagyalakshmi, Nekta Garg, Anisha Vallakati
OBJECTIVES: To compare the levels of pentraxin 3 (PTX-3) in gingival crevicular fluid (GCF) in patients undergoing orthodontic canine retraction with active tieback and nickel titanium (NiTi) coil spring. MATERIALS AND METHODS: Fifteen patients of the age group 15-25 years with first premolar extraction undergoing canine retraction were selected. One month after placement of 0.019" × 0.025" stainless steel wire, canine retraction was started with active tieback (150 g force) on upper right quadrant and NiTi coil spring (150 g force) on upper left quadrant...
April 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27127750/comparison-of-esthetics-perception-and-satisfaction-of-facial-profile-among-male-adolescents-and-adults-with-different-profiles
#16
Neda Eslami, Maryam Omidkhoda, Hooman Shafaee, Mostafa Mozhdehifard
OBJECTIVE: To evaluate esthetics perception and satisfaction of the facial profile among Iranian male adolescents and adults. MATERIALS AND METHODS: In this cross-sectional study, male subjects referred to Orthodontic Department of Mashhad Dental School were enrolled (n = 84) and were divided into two groups: Adolescents (n = 39), and adults (n = 45). They were also assigned to straight, convex, or concave profile groups based on the facial profile angle (G-Sn-Pog')...
April 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/26998476/surgery-first-orthognathic-approach-case-series-salient-features-and-guidelines
#17
Narayan H Gandedkar, Chai Kiat Chng, Winston Tan
Conventional orthognathic surgery treatment involves a prolonged period of orthodontic treatment (pre- and post-surgery), making the total treatment period of 3-4 years too exhaustive. Surgery-first orthognathic approach (SFOA) sees orthognathic surgery being carried out first, followed by orthodontic treatment to align the teeth and occlusion. Following orthognathic surgery, a period of rapid metabolic activity within tissues ensues is known as the regional acceleratory phenomenon (RAP). By performing surgery first, RAP can be harnessed to facilitate efficient orthodontic treatment...
January 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/26998475/simplified-treatment-mechanics-with-a-miniscrew-for-a-case-of-canine-impaction
#18
Zuhair Bakhsh
With the introduction of miniscrews into the orthodontic field, the efficiency and effectiveness of treating complex cases have significantly improved. Biomechanical considerations, especially relating to anchorage control have become less of a concern and side effects, as a consequence, have become minimal. This article reports on a canine impaction case in which an orthodontic miniscrew has been used to effectively and efficiently pull the canine, thereby reducing anchorage unit side effects and simplifying treatment mechanics...
January 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/26998474/comparison-of-shear-bond-strength-to-clinically-simulated-debonding-of-orthodontic-brackets-an-in-vitro-study
#19
Amal Ibrahim Linjawi, Mona A Abbassy
OBJECTIVES: To assess in vitro the quantitative and qualitative debonding behavior of the AEZ debonding plier, compared to shear debonding force, in debonding orthodontic metal brackets. MATERIALS AND METHODS: Thirty-two extracted premolars bonded with metal brackets were randomly divided into two equal groups according to the type of simulated debonding method; compressive bond strength (CBS) group using AEZ debonding plier (Ormco Corporation, USA) attached to the Instron machine, and shear bond strength (SBS) group using regular Instron attachments...
January 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/26998473/effects-of-two-erbium-doped-yttrium-aluminum-garnet-lasers-and-conventional-treatments-as-composite-surface-abrasives-on-the-shear-bond-strength-of-metal-brackets-bonded-to-composite-resins
#20
Farhad Sobouti, Sepideh Dadgar, Zahra Sanikhaatam, Nazanin Nateghian, Mahdi Gholamrezaei Saravi
BACKGROUND: Bonding brackets to dental surfaces restored with composites are increasing. No studies to date have assessed the efficacy of laser irradiation in roughening of composite and the resulted shear bond strength (SBS) of the bonded bracket. We assessed, for the 1(st) time, the efficacy of two laser beams compared with conventional methods. MATERIALS AND METHODS: Sixty-five discs of light-cured composite resin were stored in deionized distilled water for 7 days...
January 2016: Journal of Orthodontic Science
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