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Kayoung Kim, Sung-Hwan Choi, Eun-Hee Choi, Yoon-Jeong Choi, Chung-Ju Hwang, Jung-Yul Cha
OBJECTIVE: To compare soft and hard tissue responses based on the degree of maxillary incisor retraction using maximum anchorage in patients with Class II Division 1 malocclusion. MATERIALS AND METHODS: This retrospective study sample was divided into moderate retraction (<8.0 mm; n = 28) and maximum retraction (≥8.0 mm; n = 29) groups based on the amount of maxillary incisor retraction after extraction of the maxillary and mandibular first premolars for camouflage treatment...
September 19, 2016: Angle Orthodontist
Yi Lin Song, Mimi Yow, Ming Tak Chew, Kelvin Weng Chiong Foong, Hung Chew Wong
[This corrects the article DOI: 10.1155/2015/294670.].
2016: International Journal of Dentistry
Shin-Huei Wang, Yi-Hung Shih, Johnny J L Liaw
No abstract text is available yet for this article.
August 2016: Journal of Clinical Orthodontics: JCO
Jan Hourfar, Charles J Ruff, Benedict Wilmes, Bjorn Ludwig, Georgios Kanavakis
No abstract text is available yet for this article.
August 2016: Journal of Clinical Orthodontics: JCO
Toru Inami, Yuko Nakano, Ken Miyazawa, Masako Tabuchi, Shigemi Goto
To achieve optimum occlusal and facial results in a patient with high-angle maxillary protrusion, it is important to move Point A back with retraction of the anterior teeth and prevent clockwise rotation of the mandible through good vertical control. A woman, aged 42 years 5 months, with a protrusive profile sought lingual orthodontic treatment. She had a skeletal Class II high-angle pattern with maxillary protrusion and mandibular retrusion. The extraction of the 4 first premolars was indicated to correct the problems...
October 2016: American Journal of Orthodontics and Dentofacial Orthopedics
Renu Parmar, Vijay Reddy, Satheesh Kumar Reddy, Deepti Reddy
INTRODUCTION: A wide variety of factors affect the success of orthodontic miniscrews in clinical situations, including thickness of the soft tissues. Our objectives were to assess area-related and sex-related differences in the soft tissue thicknesses of the buccal attached gingiva of the maxilla and the mandible, and the palatal masticatory mucosa at common orthodontic miniscrew placement sites, and to prescribe a guideline for miniscrew selection for a predictable clinical outcome. METHODS: The sample consisted of 32 randomly selected adults in the age group of 20 to 25 years...
October 2016: American Journal of Orthodontics and Dentofacial Orthopedics
Bong-Kuen Cha, Dong-Soon Choi, Insan Jang, Byung-Hak Choe, Won-Youl Choi
Orthodontic tunnel miniscrews with and without TiO2 nanotube arrays were fabricated to improve the induction of new bone formation and osseointegration. To inject the drug of recombinant human bone morphogenetic protein, tunnels in a conventional machined miniscrew were machined by a computer-numerical-control lathe. TiO2 nanotube arrays to load the drug were also formed on the surface of the tunnel miniscrew by anodic oxidation. To obtain clean TiO2 nanotube arrays, two-step anodic oxidation was conducted...
September 28, 2016: Bio-medical Materials and Engineering
Sun-Mi Cho, Sung-Hwan Choi, Sang-Jin Sung, Hyung-Seog Yu, Chung-Ju Hwang
OBJECTIVE: The aim of this study was to determine the optimal loading conditions for pure intrusion of the six maxillary anterior teeth with miniscrews according to alveolar bone loss. METHODS: A three-dimensional finite element model was created for a segment of the six anterior teeth, and the positions of the miniscrews and hooks were varied after setting the alveolar bone loss to 0, 2, or 4 mm. Under 100 g of intrusive force, initial displacement of the individual teeth in three directions and the degree of labial tilting were measured...
September 2016: Korean Journal of Orthodontics
Hua Chen, Huibo Li, Beiyu Wang, Tao Li, Quan Gong, Yueming Song, Hao Liu
A retrospective cohort study. Plated cervical laminoplasty is an increasingly common technique. A unique facet joint disturbance induced by lateral mass miniscrews penetrating articular surface was noticed. Facet joints are important to maintain cervical spine stability and kinetic balance. Whether this facet joint disturbance could affect clinical and radiologic results is still unknown. The objective of this study is to investigate the clinical and radiologic outcomes of patients with facet joints disturbance induced by miniscrews in plated cervical laminoplasty...
September 2016: Medicine (Baltimore)
Antonio Manni, Marco Pasini, Maria Rita Giuca, Riccardo Morganti, Mauro Cozzani
BACKGROUND: The aim of this study is to investigate the pharyngeal airway space changes in patients treated with rapid palatal expansion (RPE) and Herbst appliance with or without skeletal anchorage. METHODS: A 40-patient study group treated with the Herbst RME combination was included; moreover, a comparison between two subgroups based on whether miniscrews were used was evaluated. A subgroup 1 included 20 patients who were treated with RPE and an acrylic splint Herbst with miniscrews, and subgroup 2 included 20 patients who were treated with RPE and an acrylic splint Herbst...
December 2016: Progress in Orthodontics
Aditi Gaur, Sandhya Maheshwari, Sanjeev Kumar Verma
Treatment of Class II malocclusion in nongrowing individuals is a challenging situation for the clinician. Class II malocclusion with bialveolar protrusion often dictates premolar extractions with maximum anchorage. The present article describes the case of an adult female with skeletal Class II malocclusion, bimaxillary protrusion, increased overjet, deep bite, lip protrusion, everted lower lip, deep mentolabial sulcus, and lip incompetence. To correct the malocclusion, all four first premolars were extracted...
July 2016: Contemporary Clinical Dentistry
Prapaporn Shantavasinkul, Ozan Akkus, J Martin Palomo, Sebastian Baumgaertel
INTRODUCTION: Our objective was to investigate surface strain around orthodontic miniscrews under different orthodontic loading conditions in simulated supporting bone. METHODS: Thirty miniscrews with lengths of 6, 8, and 10 mm were embedded into customized composite analog bone models. All miniscrews were inserted into the simulated test bone 6 mm deep and loaded with the same force of 200 cN, creating different tipping moments at the peri-implant bone surface...
September 2016: American Journal of Orthodontics and Dentofacial Orthopedics
Mehdi Araghbidikashani, Amin Golshah, Nafiseh Nikkerdar, Majid Rezaei
INTRODUCTION: The use of miniscrews as anchorage has become increasingly popular, but there is no consensus on the best insertion angle. The purpose of this study was to determine the impact of insertion angle on implant primary stability. METHODS: Sixty-four miniscrews, 6 × 1.6 mm, were placed in 64 fresh bone segments from 32 sheep mandibles. The miniscrews were inserted into the bone surface at 4 angles: 30°, 45°, 60°, and 90°. The maximum resistance forces of miniscrews in pullout and shear tests were determined as primary stability using a universal testing machine...
September 2016: American Journal of Orthodontics and Dentofacial Orthopedics
Klaus Sinko, Stefan Nemec, Rudolf Seemann, Christina Eder-Czembirek
PURPOSE: Impacted, in particular transmigrated, lower canines are rare. If they transmigrate, then the most common treatment is extraction. Alternatively, the native tooth can be preserved; however, management is complex. This report describes a decision-making flowchart (DMFC) with surgical strategies for the management of impacted lower canines. MATERIALS AND METHODS: Fifty-six patients had impacted lower canines, of which 16 were transmigrated. A preliminary version of the DMFC was used for the development of treatment plans to decide which strategy to apply to these complex cases...
July 22, 2016: Journal of Oral and Maxillofacial Surgery
Shingo Kuroda, Masahide Inoue, Hee-Moon Kyung, Jan Harm Koolstra, Eiji Tanaka
PURPOSE: The purpose of this study was to evaluate the influence of placement angle and force direction on the initial stability of orthodontic miniscrews using a three-dimensional finite element model that approximates the real interface between the screw and surrounding bone. MATERIALS AND METHODS: Three-dimensional finite element models with 6-mm-long and 1.4-mm-diameter titanium miniscrews were used. Four insertion angles, ranging from 0 degrees (perpendicular to the bone surface) to 45 degrees, were examined...
August 15, 2016: International Journal of Oral & Maxillofacial Implants
Xue-Dong Wang, Jie-Ni Zhang, Da-Wei Liu, Fei-Fei Lei, Yan-Heng Zhou
In the present report, we describe the successful use of miniscrews to achieve vertical control in combination with the conventional sliding MBT™ straight-wire technique for the treatment of a 26-year-old Chinese woman with a very high mandibular plane angle, deep overbite, retrognathic mandible with backward rotation, prognathic maxilla, and gummy smile. The patient exhibited skeletal Class II malocclusion. Orthodontic miniscrews were placed in the maxillary anterior and posterior segments to provide rigid anchorage and vertical control through intrusion of the incisors and molars...
July 2016: Korean Journal of Orthodontics
Sung-Hwan Choi, Seong-Jin Kim, Kee-Joon Lee, Sang-Jin Sung, Youn-Sic Chun, Chung-Ju Hwang
OBJECTIVE: The purpose of this study was to analyze stress distributions in the roots, periodontal ligaments (PDLs), and bones around cylindrical and tapered miniscrews inserted at different angles using a finite element analysis. METHODS: We created a three-dimensional (3D) maxilla model of a dentition with extracted first premolars and used 2 types of miniscrews (tapered and cylindrical) with 1.45-mm diameters and 8-mm lengths. The miniscrews were inserted at 30°, 60°, and 90° angles with respect to the bone surface...
July 2016: Korean Journal of Orthodontics
Ross J Pulver, Phillip M Campbell, Lynne A Opperman, Peter H Buschang
INTRODUCTION: In this study, we experimentally evaluated whether complex, mature sutures can be separated using skeletal anchorage and light, continuous forces. METHODS: Twelve adult, 8- to 9-month-old female New Zealand white rabbits were randomly assigned to 1 control group and 2 experimental groups. Open-coil nickel-titanium springs delivered constant forces of 100 g across the sagittal suture to miniscrew implants placed bilaterally in the frontal bone. Sutural separation was measured biweekly...
August 2016: American Journal of Orthodontics and Dentofacial Orthopedics
Nitika Monga, Om Prakash Kharbanda, Vilas Samrit
INTRODUCTION: This study provides vital insight in assessing anchorage loss when miniscrews are indirectly loaded. METHODS: The study sample comprised 18 patients with bimaxillary protrusion (14 girls, 4 boys; mean age, 17.3 ± 4.6 years) selected from a database of 89 patients treated with miniscrews. All subjects who were selected required extraction of all first premolars and maximum anchorage. After initial leveling and aligning, miniscrews were placed between the first molar and the second premolar in all 4 quadrants and loaded by the indirect method at 3 weeks after placement with 200-g nickel-titanium alloy closed-coil springs for en-masse retraction...
August 2016: American Journal of Orthodontics and Dentofacial Orthopedics
Luis Piedade, Andre Oliveira-Shahinfar, Patricia Bittencourt Dutra Dos Santos, Fabio Henrique De Sa Leitao Pinheiro
No abstract text is available yet for this article.
June 2016: Journal of Clinical Orthodontics: JCO
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