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Angle Orthodontist

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https://www.readbyqxmd.com/read/28429956/efficacy-of-piezocision-on-accelerating-orthodontic-tooth-movement-a-systematic-review
#1
Jianru Yi, Jiani Xiao, Yu Li, Xiaobing Li, Zhihe Zhao
OBJECTIVES: The aim of this systematic review was to evaluate the effect of piezocision as an adjunctive procedure to accelerate orthodontic tooth movement. MATERIALS AND METHODS: Randomized controlled trials and controlled clinical trials that investigated the effectiveness of piezocision on accelerating orthodontic tooth movement were identified through electronic and manual searches. The literature search, study inclusion, risk of bias assessment, and data extraction were performed by two reviewers independently...
April 21, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28418701/cementogenesis-is-inhibited-under-a-mechanical-static-compressive-force-via-piezo1
#2
Ying-Ying Zhang, Yi-Ping Huang, Hua-Xiang Zhao, Ting Zhang, Feng Chen, Yan Liu
OBJECTIVE: To investigate whether Piezo1, a mechanotransduction gene mediates the cementogenic activity of cementoblasts under a static mechanical compressive force. MATERIALS AND METHODS: Murine cementoblasts (OCCM-30) were exposed to a 2.0 g/cm(2) static compressive force for 3, 6, 12, and 24 hours. Then the expression profile of Piezo1 and the cementogenic activity markers osteoprotegerin (Opg), osteopontin (Opn), osteocalcin (Oc), and protein tyrosine phosphataselike member A (Ptpla) were analyzed...
April 18, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28418700/three-dimensional-analysis-of-upper-airway-morphology-in-skeletal-class-iii-patients-with-and-without-mandibular-asymmetry
#3
Xi Wen, Xiyu Wang, Shuqi Qin, Lorenzo Franchi, Yan Gu
OBJECTIVE: To compare the three-dimensional (3D) morphology of the upper airway in skeletal Class III patients with and without mandibular asymmetry and to investigate the possible underlying correlations between the morphology of the upper airway and mandibular deviation. MATERIALS AND METHODS: Cone-beam computed tomography images of 54 subjects with skeletal Class III malocclusion (ANB angle ≤ 0.4°, Wits ≤ -5.5°) were taken and 3D upper airway models were reconstructed using Dolphin 3D software...
April 18, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28402128/effects-of-skeletally-anchored-class-ii-elastics-a-pilot-study-and-new-approach-for-treating-class-ii-malocclusion
#4
Selin Ozbilek, Ahmet Yalcin Gungor, Salih Celik
OBJECTIVE: To evaluate the skeletal, dentoalveolar, and soft tissue effects of skeletally anchored Class II elastics and compare them with a matched control group treated by a monobloc appliance for the correction of skeletal Class II malocclusion due to mandibular retrusion. MATERIALS AND METHODS: Twelve patients (6 girls, 6 boys) were randomly divided into two groups. In the elastics group, six patients (12.9 ± 1.5 years of age; 3 boys, 3 girls) were treated with skeletally anchored Class II elastics...
April 12, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28375034/buccolingual-inclination-of-first-molars-in-untreated-adults-a-cbct-study
#5
Rola Alkhatib, Chun-Hsi Chung
OBJECTIVE: To evaluate the buccolingual inclinations of maxillary and mandibular first molars in untreated adults. MATERIALS AND METHODS: Fifty-nine subjects (14 males and 45 females; mean age, 41.2 years) with no missing teeth, no crossbite, and minimal crowding were included. For each subject, a CBCT was taken. The long axis of each first molar was determined, and the inclination of each molar was measured using the long axis and the floor. RESULTS: One hundred seventeen out of 118 mandibular first molars measured had a lingual inclination, with a mean of 12...
April 4, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28318312/evidence-favoring-a-secular-reduction-in-mandibular-leeway-space
#6
Tyler R Allen, Terry M Trojan, Edward F Harris
OBJECTIVE: Researchers have documented secular trends in tooth size among recent generations. This study was a test for a change in mandibular leeway space. MATERIALS AND METHODS: Dental casts from participants in the Denver Growth Study (23 boys, 22 girls; born in the 1930s) were compared with casts from a contemporary series of orthodontic patients (23 boys, 22 girls; born in the 1990s). All were phenotypically normal, healthy American whites. RESULTS: Analysis of variance (accounting for sex) showed that the cumulative mandibular primary canine plus first and second primary molar size (c + m1 + m2) was slightly larger in the recent cohort (23...
March 20, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28318311/treatment-of-vertical-maxillary-excess-without-open-bite-in-a-skeletal-class-ii-hyperdivergent-patient
#7
Cheol-Ho Paik, Hong-Sik Park, Hyo-Won Ahn
A 20-year-old woman visited the office complaining of a gummy smile and lip protrusion. She was diagnosed with vertical maxillary excess without open bite and skeletal Class II hyperdivergent pattern. She refused the surgical-orthodontic treatment option, although she wanted to correct the gummy smile and retruded chin. Differential intrusion of anterior and posterior teeth in both arches was necessary to maximize the skeletal treatment effects. In the maxilla, one palatal temporary anchorage device (TAD), an archwire with an accentuated curve of Spee, and a transpalatal arch were applied...
March 20, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28206811/types-of-tooth-movement-bodily-or-tipping-do-not-affect-the-displacement-of-the-tooth-s-center-of-resistance-but-do-affect-the-alveolar-bone-resorption
#8
Takanobu Kondo, Hitoshi Hotokezaka, Ryo Hamanaka, Megumi Hashimoto, Takako Nakano-Tajima, Kotaro Arita, Takeshi Kurohama, Airi Ino, Jun-Ya Tominaga, Noriaki Yoshida
OBJECTIVE: To investigate how types of tooth movement, bodily or tipping, influence the displacement of the center of resistance in teeth and alveolar bone resorption. MATERIALS AND METHODS: Ten-week-old female Wistar rats were divided into eight groups of different factors, as follows: type of movement (bodily and tipping) and force magnitude (10, 25, 50, and 100 cN). The maxillary left first molars were moved mesially with nickel-titanium coil springs for 28 days...
February 16, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28195497/incisor-and-molar-overjet-arch-contraction-and-molar-relationship-in-the-mixed-dentition-in-repaired-complete-unilateral-cleft-lip-and-palate-a-qualitative-and-quantitative-appraisal
#9
Suteeta Disthaporn, Sunjay Suri, Bruce Ross, Bryan Tompson, Diogenes Baena, David Fisher, Wendy Lou
OBJECTIVE: To compare the mixed dentition incisor and molar overjet, severity of contraction of the dental arch, and the sagittal molar relationship on the cleft side vs the noncleft side in children with repaired complete unilateral cleft of the lip and palate (UCLP). MATERIALS AND METHODS: Orthodontic records taken prior to orthodontic preparation for alveolar bone grafting were screened to select study casts from patients with nonsyndromic repaired complete UCLP who did not have mandibular skeletal or dental asymmetry...
February 14, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28165289/forces-and-moments-delivered-by-the-pet-g-aligner-to-a-maxillary-central-incisor-for-palatal-tipping-and-intrusion
#10
Lixia Gao, Andrea Wichelhaus
OBJECTIVE: To evaluate the effect of material thickness and width of the gingival edge on the forces and moments delivered by aligners prepared from Duran foil (PET-G) to a maxillary incisor during tipping and intrusion. MATERIALS AND METHODS: Aligners prepared from PET-G of three material thicknesses (0.5, 0.625, and 0.75 mm) and three widths of gingival edges (0-1, 3-4, and 6-7 mm) were investigated during incisor palatal tipping and intrusion of 0.5 mm each. Forces and moments were measured with a six-component measuring device...
February 6, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28156127/morphological-relationship-analysis-of-impacted-maxillary-canines-and-the-adjacent-teeth-on-3-dimensional-reconstructed-ct-images
#11
Yoojun Kim, Hong-Keun Hyun, Ki-Taeg Jang
OBJECTIVE: To examine whether there is a relationship between maxillary canine impaction and the morphologic characteristics of the maxillary dentition, especially the root of the lateral incisor. MATERIALS AND METHODS: In this study, we selected only patients with unilateral maxillary canine impaction to compare the morphologic characteristics of the dentition on the impaction side and the clinically normal eruption side. The sample size was decided to be 40 based on the pilot study...
February 3, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28139938/changes-in-pharyngeal-airway-dimensions-and-hyoid-bone-position-after-maxillary-protraction-with-different-alternate-rapid-maxillary-expansion-and-construction-protocols-a-prospective-clinical-study
#12
Mevlut Celikoglu, Muhammet Hilmi Buyukcavus
OBJECTIVE: To evaluate the changes in pharyngeal airway dimensions and the position of the hyoid bone after maxillary protraction with different alternate rapid maxillary expansion and construction (Alt-RAMEC) protocols in patients with skeletal class III malocclusion as a result of maxillary retrusion. MATERIAL AND METHODS: The patients with skeletal class III malocclusions were consecutively divided into two groups. Group 1 consisted of 17 patients (11 boys and 6 girls, mean age 11...
January 31, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28426328/fast-food-or-slow-food-orthodontics-part-2
#13
Birte Melsen
No abstract text is available yet for this article.
May 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28426327/letters-from-our-readers
#14
Hussam M Abdelkader, Ahmed Sm Ammar, Abdallah Sharafeldin
No abstract text is available yet for this article.
May 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28426325/letters-from-our-readers
#15
Niels Ganzer, Ingalill Feldmann, Lars Bondemark
No abstract text is available yet for this article.
May 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28426324/letters-from-our-readers
#16
Maria Perpétua Mota Freitas
No abstract text is available yet for this article.
May 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28426323/letters-from-our-readers
#17
Roberto Rongo, Rosa Valletta, Rosaria Bucci, Virginia Rivieccio, Angela Galeotti, Ambrosina Michelotti, Vincenzo D'Antò
No abstract text is available yet for this article.
May 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28121165/mode-of-correction-is-related-to-treatment-timing-in-class-ii-patients-treated-with-the-mandibular-advancement-locking-unit-malu-appliance
#18
Muhsin Candir, Heidi Kerosuo
OBJECTIVE: To investigate the proportion of skeletal/dentoalveolar components for correction of Class II malocclusion in relation to the pubertal growth peak (PGP) among patients treated with the mandibular advancement locking unit (MALU) appliance. MATERIALS AND METHODS: We conducted a retrospective study of 27 orthodontic patients (age range: 12-18 years; mean age 14.9 years) with skeletal Class II Division 1 malocclusion who were treated with the MALU appliance until they reached Class I occlusion with overjet and overbite within normal range...
May 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28121164/herbst-appliance-effects-on-pharyngeal-airway-ventilation-evaluated-using-computational-fluid-dynamics
#19
Tomonori Iwasaki, Hideo Sato, Hokuto Suga, Ayaka Minami, Yuushi Yamamoto, Yoshihiko Takemoto, Emi Inada, Issei Saitoh, Eriko Kakuno, Ryuzo Kanomi, Youichi Yamasaki
OBJECTIVE: To evaluate the effect of a Herbst appliance on ventilation of the pharyngeal airway (PA) using computational fluid dynamics (CFD). MATERIALS AND METHODS: Twenty-one Class II patients (10 boys; mean age, 11.7 years) who required Herbst therapy with edgewise treatment underwent cone-beam computed tomography (CBCT) before and after treatment. Nineteen Class I control patients (8 boys; mean age, 11.9 years) received edgewise treatment alone. The pressure and velocity of the PA were compared between the groups using CFD based on three-dimensional CBCT images of the PA...
May 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28059576/twitter-analysis-of-the-orthodontic-patient-experience-with-braces-vs-invisalign
#20
Daniel Noll, Brendan Mahon, Bhavna Shroff, Caroline Carrico, Steven J Lindauer
OBJECTIVE: To examine the orthodontic patient experience having braces compared with Invisalign by means of a large-scale Twitter sentiment analysis. MATERIALS AND METHODS: A custom data collection program was created that collected tweets containing the words "braces" or "Invisalign" for a period of 5 months. A hierarchal Naïve Bayes sentiment analysis classifier was developed to sort the tweets into five categories: positive, negative, neutral, advertisement, or not applicable...
May 2017: Angle Orthodontist
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