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Angle Orthodontist

Eui Seon Baek, Soonshin Hwang, Yoon Jeong Choi, Mi Ryung Roh, Tung Nguyen, Kyung-Ho Kim, Chooryung J Chung
OBJECTIVES: The objectives of this study were to evaluate the quantitative and perceived visual changes of the nasolabial fold (NLF) after maximum retraction in adults and to determine its contributing factors. MATERIALS AND METHODS: A total of 39 adult women's cone-beam computed tomography images were collected retrospectively and divided into the retraction group (age 26.9 ± 8.80) that underwent maximum retraction following 4 premolar extraction and the control group (age 24...
March 21, 2018: Angle Orthodontist
Nobukazu Shirakawa, Toshio Iwata, Shinjiro Miyake, Takero Otuka, So Koizumi, Toshitugu Kawata
OBJECTIVES: To evaluate the esthetics and frictional force of an orthodontic wire passed through a newly designed tube made of a polyether ether ketone (PEEK) resin. MATERIALS AND METHODS: Two types of standard PEEK tubes were prepared at 0.5 × 0.6ф and 0.8 × 0.9ф, and different archwires were passed through the tubes. Color values were determined according to brightness and hues. Friction was assessed with different bracket-wire combinations, and surface roughness was determined by stereomicroscopy before and after the application of friction...
March 21, 2018: Angle Orthodontist
Shereef Shahen, Gennaro Carrino, Rossella Carrino, Reham Abdelsalam, Carlos Flores-Mir, Letizia Perillo
OBJECTIVES: The objective of this study was to develop a reproducible method to measure the change of palatal volume and area through superimposition using maxillary expansion digital cast models. MATERIALS AND METHODS: A total of 10 pre- and 10 postexpansion dental cast models were scanned by the same cone-beam computed tomography machine. Superimposition was performed using a fully automated surface-best fit of the palatal surfaces on the digital cast models. A gingival plane, identified only once on superimposed casts, and a distal plane with the lateral closing border and the palatal surface were used to localize this selection of air...
March 21, 2018: Angle Orthodontist
Cuc Thi Thu Ngo, Leonard S Fishman, P Emile Rossouw, Hongyue Wang, Omar Said
OBJECTIVE: To determine the usefulness of panoramic radiographs in determining the labio-palatal position of maxillary impacted canines (MICs) and root resorption of permanent incisors on cone-beam computed tomography (CBCT) in correlation with the mesiodistal position of MICs on panoramic radiographs. MATERIALS AND METHODS: This retrospective radiographic study reviewed 64 patients with 86 MICs. Subjects were divided into two groups: group I (<15 years old) and group II (>15 years old)...
March 21, 2018: Angle Orthodontist
Abulkadir Bukhari, David Kennedy, Alan Hannam, Jolanta Aleksejūnienė, Edwin Yen
OBJECTIVES: To compare palatal symmetry, dimensions, and molar angulations following early mixed-dentition slow maxillary expansion with parameters in normal controls. MATERIALS AND METHODS: A total of 30 patients treated with a Haas-type expander for unilateral posterior crossbite with functional shift were compared with 30 controls matched for dental age, gender, and molar relationship. Records were taken before (T1) and after expansion (T2). Palatal width, surface area, volume, and molar angulations were measured on digitized models...
March 21, 2018: Angle Orthodontist
Papatpong Phermsang-Ngarm, Chairat Charoemratrote
OBJECTIVES: To compare tooth movement achieved, time required for alignment, root resorption, and alveolar bone thickness changes during initial dental alignment between groups treated with 0.012-inch preformed heat-activated or customized nickel titanium (NiTi) archwires. MATERIALS AND METHODS: Thirty-two subjects (mean age 19.8 ± 1.7 years) with severe crowding of maxillary anterior teeth had premolar extractions and were randomly allocated into control and experimental groups receiving preformed heat-activated and customized NiTi archwires, respectively...
March 21, 2018: Angle Orthodontist
Risa Usumi-Fujita, Koichi Nakakuki, Koichi Fujita, Machiko Kosugi, Ikuo Yonemitus, Eiji Fukuyama, Takashi Ono
Facial asymmetry can be caused by unilateral condylar hyperplasia. In such cases, it may be difficult to achieve symmetry since there is dentoalveolar compensation on the affected side, and the occlusal cant does not correspond to the frontal mandibular deviation. In the case presented, surgical orthodontic treatment and orthognathic surgery planning was accomplished for a patient with facial asymmetry due to condylar hyperplasia. The surgical plan was devised with particular attention to the severe dentoalveolar compensation...
March 21, 2018: Angle Orthodontist
Soo-Yeon Kim, Young-Chel Park, Kee-Joon Lee, Andreas Lintermann, Sang-Sun Han, Hyung-Seog Yu, Yoon Jeong Choi
OBJECTIVES: To evaluate changes in the volume and cross-sectional area of the nasal airway before and 1 year after nonsurgical miniscrew-assisted rapid maxillary expansion (MARME) in young adults. MATERIALS AND METHODS: Fourteen patients (mean age, 22.7 years; 10 women, four men) with a transverse discrepancy who underwent cone beam computed tomography before (T0), immediately after (T1), and 1 year after (T2) expansion were retrospectively included in this study...
March 21, 2018: Angle Orthodontist
Antonio Manni, Sabrina Mutinelli, Carmen Cerruto, Paola Giraudo, Rachele Romano, Mauro Cozzani
Objectives To compare the prevalence of clinical complications between two different telescopic Herbst systems: the conventional telescopic system, with traditional rod and tube (RMS), and the Manni telescopic Herbst appliance (MTH). Materials and Methods Ninety subjects treated with RMS were compared to 89 patients treated with MTH. All of the complications that occurred were reported, and percentages of prevalence were calculated. Results MTH showed a significantly lower percentage of reversible complications (that did not require appliance removal) when compared to the reversible complications during RMS treatment (20...
March 8, 2018: Angle Orthodontist
Vinni Arora, Rekha Sharma, Sonal Chowdhary
The objective of this study was to evaluate and compare the effects of PowerScope and Forsus in the treatment of Class II division 1 malocclusion. Materials and Methods This was a 2-arm parallel, double-blind, randomized, controlled trial. A total of 28 Class II division 1 malocclusion patients indicated for treatment with fixed functional appliances were randomized and equally divided (n = 14) among PowerScope (American Orthodontics, Sheboygan, Wis; mean age 14.11 ± 1.3 years) and Forsus (3M Unitek Corp, Monrovia, Calif; mean age 15...
March 8, 2018: Angle Orthodontist
Valmy Pangrazio-Kulbersh, He-Kyong Kang, Archana Dhawan, Riyad Al-Qawasmi, Rafael Rocha Pacheco
OBJECTIVE: To evaluate the outcome of early treatment in Class I, II, and III malocclusions based on the reduction of weighted Peer Assessment Rating (PAR) scores. MATERIALS AND METHODS: Two hundred thirty subjects (female = 105; male = 125) selected from 400 cases were divided into three groups based on their malocclusions (Class I, II, and III). The PAR index was evaluated prior to early treatment (T0), at the end of phase I (T1), and after completion of phase II therapy (T2)...
March 7, 2018: Angle Orthodontist
Chihiro Tanikawa, Kenji Takada
OBJECTIVES: To evaluate the test-retest reliability of three types of facial expression tasks using three-dimensional (3D) facial topography. MATERIALS AND METHODS: Twelve adult volunteers were enrolled in this study. They were instructed to perform three different facial expression tasks: rest posture, posed smile, and maximum effort smile. Each task was recorded using a 3D image-capturing device on two separate occasions with an interval of 1 week between sessions...
March 6, 2018: Angle Orthodontist
Ama Johal, Asma B Ashari, Nasser Alamiri, Padhraig S Fleming, Usman Qureshi, Shirley Cox, Nikolaos Pandis
OBJECTIVES: To quantify the intensity and duration of pain experience in adults over the initial three visits of fixed appliance-based orthodontic treatment. A secondary objective was to assess the relationship between pain experience and analgesic use, dental irregularity, gender, and age. MATERIALS AND METHODS: A prospective longitudinal study design was adopted. Fifty-eight adults undergoing fixed appliance treatment in five orthodontic practices recorded pain experience at four time points (4 hours, 24 hours, 3 days, and 7 days) following the initial bond-up appointment (T0) and first (T1) and second (T2) routine follow-up adjustment appointments using a visual analogue scale...
March 6, 2018: Angle Orthodontist
Georgios Polychronis, Youssef S Al Jabbari, Theodore Eliades, Spiros Zinelis
OBJECTIVES: The aim of this research was to assess galvanic behavior of lingual orthodontic brackets coupled with representative types of orthodontic wires. MATERIALS AND METHODS: Three types of lingual brackets: Incognito (INC), In-Ovation L (IOV), and STb (STB) were combined with a stainless steel (SS) and a nickel-titanium (NiTi) orthodontic archwire. All materials were initially investigated by scanning electron microscopy / x-ray energy dispersive spectroscopy (SEM/EDX) while wires were also tested by x-ray diffraction spectroscopy (XRD)...
March 6, 2018: Angle Orthodontist
Manika Agarwal, Emily Wible, Tyler Ramir, Sibel Altun, Grace Viana, Carla Evans, Henry Lukic, Spiro Megremis, Phimon Atsawasuwan
OBJECTIVES: To evaluate the long-term effects of seven different cleaning methods on light transmittance, surface roughness, and flexural modulus of a polyurethane retainer material. MATERIALS AND METHODS: Polyurethane retainer specimens (Vivera®, Align Technology Inc) (70 specimens, n = 10 per method, 50.8 mm × 12.7 mm × 1.0 mm) were exposed to seven cleaning methods twice a week for 6 months. Before treatment and after 6 months, light transmittance, surface roughness, and flexural modulus of the specimens were quantified...
March 6, 2018: Angle Orthodontist
Raymund E Rebong, Kelton T Stewart, Achint Utreja, Ahmed A Ghoneima
OBJECTIVES: The aim of this study was to assess the dimensional accuracy of fused deposition modeling (FDM)-, Polyjet-, and stereolithography (SLA)-produced models by comparing them to traditional plaster casts. MATERIALS AND METHODS: A total of 12 maxillary and mandibular posttreatment orthodontic plaster casts were selected from the archives of the Orthodontic Department at the Indiana University School of Dentistry. Plaster models were scanned, saved as stereolithography files, and printed as physical models using three different three-dimensional (3D) printers: Makerbot Replicator (FDM), 3D Systems SLA 6000 (SLA), and Objet Eden500V (Polyjet)...
March 6, 2018: Angle Orthodontist
Barrett Nordstrom, Toshihiro Shoji, W Cameron Anderson, Henry W Fields, F Michael Beck, Do-Gyoon Kim, Teruko Takano-Yamamoto, Toru Deguchi
OBJECTIVES: The purpose of this prospective, double-blind, randomized clinical trial was to compare the clinical efficiency of nickel-titanium (NiTi) and niobium-titanium-tantalum-zirconium (TiNbTaZr) archwires during initial orthodontic alignment. MATERIALS AND METHODS: All subjects (ages between 12 and 20 years) underwent nonextraction treatment using 0.022-inch brackets. All patients were randomized into two groups for initial alignment with 0.016-inch NiTi archwires (n = 14), or with 0...
March 5, 2018: Angle Orthodontist
Dimitrios Stasinopoulos, Spyridon N Papageorgiou, Frank Kirsch, Nikolaos Daratsianos, Andreas Jäger, Christoph Bourauel
OBJECTIVES: To compare the failure pattern of four different bracket types and to assess its effect on treatment duration. MATERIALS AND METHODS: A total of 78 white patients (28 male, 50 female) with a mean age of 12.6 years were included in this retrospective cohort study and treated for a mean period of 30.6 months. The patients were treated in a private practice with stainless steel conventionally ligated brackets, ceramic conventionally ligated brackets, stainless steel self-ligating brackets, or nickel-free self-ligating brackets...
February 2, 2018: Angle Orthodontist
Yingdan Pan, Yunting Zeng, Zeyu Zhang, Yiqin Liu, Yi Jing, Liwei Xiao
OBJECTIVES: To evaluate alveolar bone support around cleft-adjacent maxillary central incisors (U1) in patients with unilateral cleft lip, alveolus and palate (UCLAP) in the late mixed dentition and to investigate the correlation between the alveolar bone thickness (ABT) and tooth inclination. MATERIALS AND METHODS: Cone beam computed tomography scans of 45 subjects with UCLAP (29 boys, 16 girls; mean age = 10.74 ± 1.08 years) were assessed. The distance between the cementoenamel junction (CEJ) and alveolar bone crest (AC), and the ABTs at 3 mm, 6 mm, and the apex were measured on the labial, lingual and distal surfaces of U1...
January 31, 2018: Angle Orthodontist
Lauren M Wegrzyniak, Deborah Hedderly, Kishore Chaudry, Prashanti Bollu
OBJECTIVE: To evaluate the effectiveness of patient-chosen appointment reminder methods (phone call, e-mail, or SMS text) in reducing no-show rates. MATERIALS AND METHODS: This was a retrospective case study that determined the correlation between patient-chosen appointment reminder methods and no-show rates in a private orthodontic practice. This study was conducted in a single office location of a multioffice private orthodontic practice using data gathered in 2015...
January 29, 2018: Angle Orthodontist
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