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https://www.readbyqxmd.com/read/29779289/-orthodontic-intrusion-of-the-first-and-second-mandibular-molars-with-a-vacuum-formed-removable-appliance-a-case-report
#1
Qing Liu, Xin-Qi Huang, Dan Jiang, Hao-Jun Chi, Ling-Jie Wang, Wen-Tian Sun, Jun Liu
This case report focused on a patient with supraeruption of the first and second mandibular molars as a result of loss of the first and second maxillary molars for a long time. We adopted a combination of a vacuum-formed removable appliance and elastics to intrude the first and second mandibular molars by using a continuous, light force to acquire sufficient restoration space for maxillary molars. Thus, the dental-implant treatment was successful, and a good and stable occlusal relationship was established.
April 1, 2018: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29779288/-advances-in-surgical-techniques-of-periodontal-corticotomy
#2
Si-Yu Wang, Zhen-Dong Wang, Bin Yan
The number of adults seeking orthodontic treatment is increasing. Shortening the course of orthodontic treatment has become a research hotspot in recent years. Methods of accelerating tooth movement have been reported. Theoretical and clinical studies have confirmed that periodontal corticotomy is effective in accelerating tooth movement and increasing osteogenic potential. Many surgical techniques of periodontal corticotomy have been developed. This review summarizes the history of periodontal corticotomy and the development of the surgical techniques in recent years, thereby providing references for the clinical application of corticotomy...
April 1, 2018: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29779287/-current-situation-of-clinical-research-on-impacted-premolars
#3
Ran-Ran Liu, Jun Tian
Teeth impaction is a common developmental malformation in oral diseases. Impacted teeth are usually the canines, third molar, central incisors, premolars, and second molars. The prevalence of impaction of maxillary canines and mandibular wisdom teeth is higher than that of other teeth. Most recent studies have focused on the canines and third molars, but research on impacted premolars is limited. In clinical practice, the majority of orthodontic patients require premolar extraction. Thus, impacted premolars play important roles in orthodontic design and prognosis...
April 1, 2018: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29779276/-fabrication-and-accuracy-research-on-3d-printing-dental-model-based-on-cone-beam-computed-tomography-digital-modeling
#4
Hui-Rong Zhang, Le-Feng Yin, Yan-Li Liu, Li-Yi Yan, Ning Wang, Gang Liu, Xiao-Li An, Bin Liu
OBJECTIVE: The aim of this study is to build a digital dental model with cone beam computed tomography (CBCT), to fabricate a virtual model via 3D printing, and to determine the accuracy of 3D printing dental model by comparing the result with a traditional dental cast. METHODS: CBCT of orthodontic patients was obtained to build a digital dental model by using Mimics 10.01 and Geomagic studio software. The 3D virtual models were fabricated via fused deposition modeling technique (FDM)...
April 1, 2018: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29778965/metal-hypersensitivity-in-the-context-of-connective-tissue-disease-an-opportunity-for-practice-prevention
#5
Jack Ρ Guccione, Sharon E Jacob
Metal hypersensitivity reactions (MHR) are not associated with metal containing orthodontic implants unless there is a positive history of dermatitis from a high nickel-release item (piercing post, earring, watch). We wish to present this letter to highlight evidence surrounding orthodontic-related nickel hypersensitivity and to bring to the readers attention current American Contact Dermatitis Society (ACDS) guidelines that endorse the importance of addressing metal hypersensitivity reactions in the setting of implantable dental devices...
May 17, 2018: Environmental Research
https://www.readbyqxmd.com/read/29777251/association-of-anterior-and-posterior-occlusal-planes-with-different-angle-and-skeletal-classes-in-permanent-dentitions-a-lateral-cephalometric-radiograph-study
#6
Aleš Čelar, Ekrem Tafaj, Alexandra Graf, Stefan Lettner
OBJECTIVES: Malocclusions affect about two-thirds of the population and orthodontic treatment is justified in 65% of these. However, the associations between anterior and posterior occlusal plane (AOP, POP) inclinations and Angle classification are lacking. PATIENTS AND METHODS: In a retrospective study, lateral cephalometric radiograph tracings of 230 previously untreated Caucasians, aged 13 to 49 years, yielded inclines of the bisector occlusal plane, AOP, and POP...
May 17, 2018: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/29775553/influence-of-photobiomodulation-therapy-on-gingivitis-induced-by-multi-bracket-appliances-a-split-mouth-randomized-controlled-trial
#7
Steffen Stein, Michael Schauseil, Andreas Hellak, Heike Korbmacher-Steiner, Andreas Braun
OBJECTIVE: The objective of this split-mouth trial was to investigate the influence of photobiomodulation therapy (PBMT) on adjuvant treatment of gingivitis induced by multi-bracket appliances, after bracket debonding and professional tooth cleaning. MATERIALS AND METHODS: Thirteen patients (mean age 16.15 years; standard deviation ±2.12 years) who had completed active orthodontic treatment with fixed orthodontic appliances in an orthodontic clinic were included on a randomized basis...
May 18, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29772849/relationship-between-orthodontic-treatment-need-and-oral-health-related-quality-of-life-among-11%C3%A2-18-year-old-adolescents-in-lithuania
#8
Aistė Kavaliauskienė, Antanas Šidlauskas, Apolinaras Zaborskis
The aim was to examine the relationship between orthodontic treatment need and Oral Health-Related Quality of Life (OHRQoL) among Lithuanian adolescents aged 11⁻18 across gender and age groups. A representative cross-sectional study of 911 adolescents aged 11⁻18 (mean (M) = 15.53; Standard Deviation (SD) = 1.52) was conducted in 26 public schools. The schoolchildren completed the Child Perceptions Questionnaire to evaluate their OHRQoL. The Index of Orthodontic Treatment Need (IOTN) was used to evaluate the severity of malocclusion...
May 17, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29772080/substance-p-and-calcitonin-gene-related-peptide-expression-in-human-periodontal-ligament-after-root-canal-preparation-with-reciproc-blue-waveone-gold-xp-endoshaper-and-hand-files
#9
J Caviedes-Bucheli, N Rios-Osorio, M Rey-Rojas, F Laguna-Rivero, M M Azuero-Holguin, L E Diaz, H Curtidor, J J Castaneda-Ramirez, H R Munoz
AIM: To quantify the Substance P (SP) and Calcitonin gene-related peptide (CGRP) expression in healthy human periodontal ligament from premolars after root canal preparation with Reciproc Blue, WaveOne Gold, XP EndoShaper and hand files. METHODOLOGY: Fifty human periodontal ligament samples were obtained from healthy mandibular premolars where extraction was indicated for orthodontic reasons. Prior to extraction, 40 of these premolars were equally divided into four groups, and root canals were prepared using four different systems: Reciproc Blue, WaveOne Gold, XP EndoShaper, and a hand instrumentation technique...
May 17, 2018: International Endodontic Journal
https://www.readbyqxmd.com/read/29771300/evaluation-of-orthodontically-induced-external-root-resorption-following-orthodontic-treatment-using-cone-beam-computed-tomography-cbct-a-systematic-review-and-meta-analysis
#10
Aikaterini Samandara, Spyridon N Papageorgiou, Ioulia Ioannidou-Marathiotou, Smaragda Kavvadia-Tsatala, Moschos A Papadopoulos
Background: Orthodontically induced external root resorption (OIRR) is a pathologic consequence of orthodontic tooth movement. However, the limitations of two-dimensional radiography suggest that cone beam computed tomography (CBCT) with its three-dimensional capabilities might be more suitable to assess OIRR. Objective: The aim of this study was to assess in an evidence-based manner data on linear or volumetric OIRR measurements of permanent teeth by means of CBCT, during and/or after the end of orthodontic treatment...
May 15, 2018: European Journal of Orthodontics
https://www.readbyqxmd.com/read/29768522/tif4-varnish-protects-the-retention-of-brackets-to-enamel-after-in-vitro-mild-erosive-challenge
#11
Maria Isabel Dantas de Medeiros, Hugo Lemes Carlo, Rogério Lacerda Dos Santos, Frederico Barbosa Sousa, Ricardo Dias de Castro, Renata Cristina Sobreira França, Fabíola Galbiatti de Carvalho
The effect of fluoride agents on the retention of orthodontic brackets to enamel under erosive challenge is little investigated. The aim of this study was to evaluate the effect of titanium tetrafluoride (TiF4) and sodium fluoride (NaF) agents on the shear bond strength of brackets to enamel and on the enamel microhardness around brackets under erosive challenge. Brackets were bonded to bovine incisors. Five groups were formed according to fluoride application (n=10): TiF4 varnish, TiF4 solution, NaF varnish, NaF solution and control (without application)...
May 14, 2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29768521/immediate-effects-of-temporary-bite-raising-with-light-cured-orthodontic-band-cement-on-the-electromyographic-response-of-masticatory-muscles
#12
Darin Pativetpinyo, Weera Supronsinchai, Chidsanu Changsiripun
To assess the immediate effects of temporary bite-raising using light-cured orthodontic band cement on the superficial masseter and anterior temporalis electromyography (EMG) activity in healthy adults. Surface EMG signals were recorded bilaterally from the superficial masseter and anterior temporalis muscles of 30 volunteers with a normal occlusion, before and after having temporary bite-raising. The bite-raising was done by adding light-cured orthodontic band cement (3x5x2 mm WxLxH) on the lingual cusps of both upper first molars...
May 14, 2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29768044/cocl2-induces-apoptosis-via-ros-dependent-pathway-and-drp1-mediated-mitochondria-fission-in-the-periodontal-ligament-stem-cells
#13
Yuting He, Xueqi Gan, Ling Zhang, Beilei Liu, Zhuoli Zhu, Tao Li, Junfei Zhu, Junsheng Chen, Haiyang Yu
Oxygen deficiency is associated with various oral diseases, including chronic periodontitis, age-related alveolar bone loss and mechanical stress-linked cell injury from orthodontic appliances. Nevertheless, our understanding of the impact of hypoxia on periodontal tissues and its biochemical mechanism is still rudimentary. The purpose of this research was to elucidate the effects of hypoxia on the apoptosis of human periodontal ligament stem cells (PDLSCs) in vitro and the underlying mechanism. Herein, we showed that CoCl2 triggered cell dysfunction in human PDLSCs in a concentration-dependent manner and resulted in cell apoptosis and oxidative stress overproduction and accumulation in PDLSCs...
May 16, 2018: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/29765918/comparative-tomographic-study-of-the-maxillary-central-incisor-collum-angle-between-class-i-class-ii-division-1-and-2-patients
#14
Murilo Fernando Neuppmann Feres, Bianca Santana Rozolen, Adel Alhadlaq, Thamer A Alkhadra, Tarek El-Bialy
INTRODUCTION: It has been reported that Class II, division 2 maxillary central incisors frequently demonstrate increased collum angles, which indicates an excessive palatal "bend" of the crown. However, evidence supporting such observation is mostly derived from radiographic studies. OBJECTIVE: The objective of this study was to evaluate and compare the collum angle of maxillary central incisors in Class I, Class II, division 1, and Class II, division 2 cases using cone-beam computed tomography...
2018: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/29765916/an-assessment-of-job-satisfaction-a-cross-sectional-study-among-orthodontists-of-saudi-arabia
#15
Nasser D Alqahtani, Khaled Alshehry, Saad Alateeq, Hammad Alturki, Sahar Albarakati, Moshabab A Asiry, Muhammad S Ahmedani
AIM OF THE STUDY: The main objective of the present study was to investigate the level of job satisfaction among professional orthodontists in relation to some significant intrinsic and extrinsic factors that generally affect their performance. MATERIALS AND METHODS: A cross-sectional study was conducted among orthodontists working in the Kingdom of Saudi Arabia using an online survey questionnaire through Survey Monkey. A total of 161 responses were received; among those, 57...
2018: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/29765914/nonsurgical-treatment-and-stability-of-an-adult-with-a-severe-anterior-open-bite-malocclusion
#16
Aldo Otazú Cambiano, Guilherme Janson, Diego Coelho Lorenzoni, Daniela Gamba Garib, Dino Torres Dávalos
OBJECTIVES: A skeletal anterior open-bite is a challenging malocclusion for the orthodontist due to the difficulty and instability of correction. Treatment options for the adult patient include extractions, anterior extrusion with intermaxillary elastics, posterior intrusion using skeletal anchorage, occlusal adjustment, and orthognathic surgery. Patient compliance plays a key role in posttreatment stability. The present case report demonstrates the orthodontic treatment of an adult patient who presented with a complex open-bite malocclusion...
2018: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/29765913/survival-analysis-of-an-orthodontic-bracket-bond-subjected-to-cyclic-tensile-and-shear-forces
#17
Ameerah Y Mansour, Mohamed Bamashmous
OBJECTIVES: The objective of this study was to evaluate the use of survival analysis in cyclic fatigue testing in orthodontic bracket bonding. MATERIALS AND METHODS: We used 100 extracted bovine lower incisors (50 orthodontic brackets and 50 eyelet brackets). Each set of brackets was further divided by etching technique (25 total-etch and 25 self-etch). Cyclic fatigue testing was performed at a crosshead speed of 2 mm/min using an up-and-down method. Kaplan-Meier survival data analyses and Cox regression analyses were performed...
2018: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/29765569/bolton-discrepancy-in-an-iranian-population-and-its-relation-with-maxillary-lateral-incisors-size
#18
Shabnam Ajami, Hamidreza Fattahi, Mahsa Zare, Peyman Jenabi
Background: Bolton's two main ratios describing the proportional size of upper and lower teeth, could contribute to estimating the excess or deficiency of tooth size necessary to obtain an ideal occlusion. However, the mean Bolton values are not the same among different societies. Determining the prevalence of tooth size deviations from population-specific Bolton indices might help local orthodontists to have a more concise treatment plan. Objective: The study aimed to define the prevalence of clinically significant tooth size discrepancies (TSD) in an Iranian population and to evaluate the influence of lateral incisors' size on this discrepancy...
March 2018: Electronic Physician
https://www.readbyqxmd.com/read/29762437/primary-premaxillary-ostectomy-and-setback-dealing-with-the-fly-away-premaxilla
#19
Rana Farhadi, Robert D Wallace
OBJECTIVE: This study aimed to analyze our outcomes of primary premaxillary ostectomy and setback combined with lip adhesion as the first stage in repair of the bilateral cleft lip with fly-away premaxilla. METHODS: This retrospective study included all patients who required primary premaxillary setback by a single surgeon to achieve successful lip repair between 2011 and 2017 at a tertiary children's hospital. All patients had bilateral cleft lip and complete cleft palate with significant premaxillary protrusion...
May 14, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29761707/evaluation-of-the-load-system-produced-by-a-single-intrusion-bend-in-a-maxillary-lateral-incisor-bracket-with-different-alloys
#20
Ricardo Lima Shintcovsk, Roberto Soares da Silva, Larry White, Lidia Parsekian Martins, Renato Parsekian Martins
OBJECTIVES: To evaluate if a 0.5-mm vertical bend applied on an incisor bracket produces movements in other planes and if different wires influence these effects. MATERIALS AND METHODS: An acrylic model of a treated patient with brackets passively bonded was attached to an Orthodontic Force Tester, and a load cell was attached to the left lateral incisor. Thirty 0.019 × 0.025-inch archwires were divided into three groups according to their alloy: SS (stainless steel), B-Ti (beta-titanium), and MF (beta-titanium wire coated with nickel-titanium)...
May 15, 2018: Angle Orthodontist
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