Objective: The purposes of this study were to measure the orthodontic forces generated by thermoplastic aligners and investigate the possible influences of different activations for lingual bodily movements on orthodontic forces, and their attenuation.
Methods: Thermoplastic material of 1.0-mm in thickness was used to manufacture aligners for 0.2, 0.3, 0.4, 0.5, and 0.6 mm activations for lingual bodily movements of the maxillary central incisor. The orthodontic force in the lingual direction delivered by the thermoplastic aligners was measured using a micro-stress sensor system for the invisible orthodontic technique, and was monitored for 2 weeks.
Results: Orthodontic force increased with the amount of activation of the aligner in the initial measurements. The attenuation speed in the 0.6 mm group was faster than that of the other groups (p < 0.05). All aligners demonstrated rapid relaxation in the first 8 hours, which then decreased slowly and plateaued on day 4 or 5.
Conclusions: The amount of activation had a substantial influence on the orthodontic force imparted by the aligners. The results suggest that the activation of lingual bodily movement of the maxillary central incisor should not exceed 0.5 mm. The initial 4 or 5 days is important with respect to orthodontic treatment incorporating an aligner.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4807150 | PMC |
| http://dx.doi.org/10.4041/kjod.2016.46.2.65 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Invisible treatment with preadjusted lingual appliance and monolateral space opening for an adult Class II malocclusion with upper lateral incisors agenesis: An ortho-prosthetic case report.
Int Orthod
October 2024
Postgraduate school of Orthodontics, University of Ferrara, Ferrara, Italy.
This case report describes the treatment of a Class II malocclusion with upper lateral incisors agenesis in an adult patient, performed by an invisible preadjusted lingual appliance, monolateral space opening and dental Class II correction. The patient had previously been treated by clear aligners with the insertion of an implant in upper right canine position in order to close the remaining space. With the twofold aim of obtaining ideal occlusal relationship and smile aesthetic improvement, it highlights how a fixed orthodontic technique is needed to achieve the planned results, when anterior torque, bodily translations and deep-bite correction are necessary.
View Article and Find Full Text PDFCantilever-aided bodily protraction of a mandibular molar with clear aligner: A finite element analysis.
Int Orthod
December 2024
Department of Orthodontics, State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041 Sichuan, China. Electronic address:
Objective: To analyse the biomechanics of molar protraction through clear aligner therapy (CAT) with and without a buccal cantilever.
Methods: Models were composed of mandible, lower dentition, periodontal ligaments, attachments, a buccal cantilever, and clear aligner. Four groups were designed: (1) control (aligner only), (2) aligner+buccal cantilever with buccal class II traction, (3) aligner+buccal cantilever with buccal class II and lingual class II tractions, (4) aligner+buccal cantilever with buccal horizontal traction named buccal class I, buccal class II, and lingual class II tractions.
Supragingival Plaque Microbiomes in a Diverse South Florida Population.
Microorganisms
September 2024
Department of Biological Sciences, Halmos College of Arts and Sciences, Guy Harvey Oceanographic Center, Nova Southeastern University, Fort Lauderdale, FL 33328, USA.
Article Synopsis
- Trillions of microbes in the human mouth act as a crucial organ, but there's a lack of understanding about oral microbiomes in underrepresented ethnic groups in the U.S. like Hispanics, Blacks, and Asians.
- The study uses advanced sequencing to examine bacterial communities in saliva and plaque from 26 healthy individuals in South Florida, a culturally diverse area.
- Findings reveal notable differences in microbial composition based on factors like mouth location, sex, and gingival health, underscoring the importance of including a diverse range of populations in oral microbiome research.
A Case of Pernicious Anemia with Concurrent Beta-Thalassemia Minor.
J Blood Med
August 2024
Department of General Practice, Longgang District Central Hospital of Shenzhen, Shenzhen, 5181116, People's Republic of China.
Vitamin B is essential for various bodily functions, and its deficiency may cause hematological manifestations. We report a case of a previously healthy 65-year-old female who was admitted to our hospital with reduced sense of taste and painful tongue. The serum level of vitamin B was decreased.
View Article and Find Full Text PDFMandibular cortical bone remodeling characteristics in patients with extraction: A cone-beam computed tomography study.
Am J Orthod Dentofacial Orthop
September 2024
Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China. Electronic address:
Introduction: This study evaluated the labial and lingual cortical bone remodeling characteristics of mandibular central incisors after retraction, which remain controversial among orthodontists.
Methods: Cortical bone remodeling and central incisor movement of 33 patients (aged 23.64 ± 4.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!