CUSTOM-MADE BRACKETS FABRICATION BY AN ADDITIVE MANUFACTURING PROCESS FOR ORTHODONTIC TREATMENT

2011 ◽  
Vol 23 (06) ◽  
pp. 493-500
Author(s):  
Ming-June Tsai ◽  
Ching-Tsai Wu ◽  
Chih-Yu Chen
Keyword(s):  
Additive Manufacturing ◽  
Orthodontic Treatment ◽  
Setup Time ◽  
Modern Method ◽  
Powder Injection ◽  
Plaster Mold ◽  
Functional Requirements ◽  
Custom Made ◽  
Digital Planning ◽  
Dimensional Measurements

Brackets are basic elements of orthodontic systems. Traditionally, they are produced by a powder-injection mass production process, by which it is difficult to develop individualized products. This study applies computer-aided engineering techniques, including digitizing, virtual model design, and additive manufacturing (AM) to orthodontics for the production of customized brackets. First, a digital model of the teeth was obtained via a 3D scanning process, in which an individual teeth plaster mold was digitized; customized brackets were then designed based on the model, and physical brackets were rapidly fabricated by AM processing. Finally, key dimensional measurements of the brackets were taken to confirm whether the brackets fulfilled the functional requirements for clinical usage. By this process, brackets designed for different teeth pads were obtained by digital planning, CAD design and rapid manufacturing. The custom-made brackets include complete dental profile information, and increase the efficiency of treatment, save clinical setup time, and reduce the treatment duration and cost for the patient. The direct manufacture of metal brackets by an AM process is a modern method with great potential to be used in the generation of customized brackets for orthodontic treatment.

Regeneration von Knochendefekten mit computergesteuerter Herstellung von Gerüstträgern

2013 ◽  
Vol 22 (03) ◽  
pp. 180-187 ◽  
Author(s):  
J. Henke ◽  
J. T. Schantz ◽  
D. W. Hutmacher
Keyword(s):  
Tissue Engineering ◽  
Additive Manufacturing ◽  
Custom Made

ZusammenfassungDie Behandlung ausgedehnter Knochen-defekte nach Traumata oder durch Tumoren stellt nach wie vor eine signifikante Heraus-forderung im klinischen Alltag dar. Aufgrund der bestehenden Limitationen aktueller Therapiestandards haben Knochen-Tissue-Engineering (TE)-Verfahren zunehmend an Bedeutung gewonnen. Die Entwicklung von Additive-Manufacturing (AM)-Verfahren hat dabei eine grundlegende Innovation ausgelöst: Durch AM lassen sich dreidimensionale Gerüstträger in einem computergestützten Schichtfür-Schicht-Verfahren aus digitalen 3D-Vorlagen erstellen. Wurden mittels AM zunächst nur Modelle zur haptischen Darstellung knöcherner Pathologika und zur Planung von Operationen hergestellt, so ist es mit der Entwicklung nun möglich, detaillierte Scaffoldstrukturen zur Tissue-Engineering-Anwendung im Knochen zu fabrizieren. Die umfassende Kontrolle der internen Scaffoldstruktur und der äußeren Scaffoldmaße erlaubt eine Custom-made-Anwendung mit auf den individuellen Knochendefekt und die entsprechenden (mechanischen etc.) Anforderungen abgestimmten Konstrukten. Ein zukünftiges Feld ist das automatisierte ultrastrukturelle Design von TE-Konstrukten aus Scaffold-Biomaterialien in Kombination mit lebenden Zellen und biologisch aktiven Wachstumsfaktoren zur Nachbildung natürlicher (knöcherner) Organstrukturen.

scholarly journals Useful design of custom-made mouthguard for athletes undergoing orthodontic treatment with brackets and wires

2021 ◽  
Author(s):  
Ruman Uddin Chowdhury ◽  
Hiroshi Churei ◽  
Gen Tanabe ◽  
Yuriko Yoshida ◽  
Kairi Hayashi ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Custom Made

scholarly journals A Protocol for the Use of a Combined Microvascular Free Flap with Custom-Made 3D-Printed Total Temporomandibular Joint (TMJ) Prosthesis for Mandible Reconstruction in Children

2021 ◽  
Vol 11 (5) ◽  
pp. 2176
Author(s):  
Krzysztof Dowgierd ◽  
Rafal Pokrowiecki ◽  
Maciej Borowiec ◽  
Marcin Kozakiewicz ◽  
Dominika Smyczek ◽  
...  
Keyword(s):  
Temporomandibular Joint ◽  
Soft Tissues ◽  
Total Joint Replacement ◽  
Speech Development ◽  
Functional Requirements ◽  
Immediate Reconstruction ◽  
Congenital Deformities ◽  
Custom Made ◽  
Masticatory System

Extended postoperative mandibular reconstructions due to orofacial disease involving the temporomandibular joint (TMJ) in immature patients remain a challenge as a result of ongoing growth, which is usually affected by the disease and treatment. Current reconstructive techniques based fully on alloplastic total joint replacement fail to meet fully the anatomical and functional requirements for the masticatory system and speech development. Fourteen children aged 12.6 ± 2.6 with tumors or congenital deformities affecting the mandible and TMJ were included in the study. Radical surgical treatment according to our own protocol was performed through microvascular anastomotic flap reconstruction of the soft tissues and bones, together with total TMJ custom replacements. Follow-up lasted 2–6 years. During the follow-up, increases in the mandible body (13% growth) and ramus (12% growth) were observed, both of which were related (p < 0.001). This is the first report concerning the immediate reconstruction of the mandible with ramus and total TMJ in children and adolescents that combines a free vascularized graft and total individual prosthesis of the TMJ. The presented technique enabled optimal function of the TMJ, growth of the mandible, and further rehabilitation of the patients. The technique was demonstrated to be safe, reliable, and provide good functional and cosmetic outcomes.

Optimization of Metallic Powder Filaments for Additive Manufacturing Extrusion (MEX)

2021 ◽  
Author(s):  
Fábio Silva Cerejo ◽  
Daniel Gatões ◽  
Teresa Vieira
Keyword(s):  
Additive Manufacturing ◽  
Low Cost ◽  
Metallic Powder ◽  
Powder Injection ◽  
Layer By Layer ◽  
Powder Injection Moulding ◽  
Powder Particles ◽  
Powder Content ◽  
Metallic Parts ◽  
Am Processes

Abstract Additive manufacturing (AM) of metallic powder particles has been establishing itself as sustainable, whatever the technology selected. Material Extrusion (MEX) integrates the ongoing effort to improve AM sustainability, in which low-cost equipment is associated with a decrease of powder waste during manufacturing. MEX has been gaining increasing interest for building 3D functional/structural metallic parts because it incorporates the consolidated knowledge from powder injection moulding/extrusion feedstocks into the AM scope—filament extrusion layer-by-layer. Moreover, MEX as an indirect process can overcome some of the technical limitations of direct AM processes (laser/electron-beam-based) regarding energy-matter interactions. The present study reveals an optimal methodology to produce MEX filament feedstocks (metallic powder, binder and additives), having in mind to attain the highest metallic powder content. Nevertheless, the main challenges are also to achieve high extrudability and a suitable ratio between stiffness and flexibility. The metallic powder volume content (vol.%) in the feedstocks was evaluated by the critical powder volume concentration (CPVC). Subsequently, the rheology of the feedstocks was established by means of the mixing torque value, which is related to the filament extrudability performance.

scholarly journals Modification of Interfacial Interactions in Ceramic-Polymer Nanocomposites by Grafting: Morphology and Properties for Powder Injection Molding and Additive Manufacturing

2020 ◽  
Vol 10 (4) ◽  
pp. 1471 ◽  
Author(s):  
Santiago Cano ◽  
Ali Gooneie ◽  
Christian Kukla ◽  
Gisbert Rieß ◽  
Clemens Holzer ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Injection Molding ◽  
Powder Injection ◽  
Polymer Grafting ◽  
Interfacial Interactions ◽  
High Adhesion ◽  
Nanoparticles Dispersion ◽  
Dynamics Simulations ◽  
Separation Results

The adhesion of the polymer to ceramic nanoparticles is a key aspect in the manufacturing of ceramic parts by additive manufacturing and injection molding, due to poor separation results in separation during processing. The purpose of this research is to investigate, by means of molecular dynamics simulations and experimental methods, the role of improved interfacial interactions by acrylic acid grafting-high density polyethylene on the adhesion to zirconia nanoparticles and on the composite properties. The polymer grafting results in high adhesion to the nanoparticles, increases the nanoparticles dispersion and improves the viscoelastic and mechanical properties required for additive manufacturing and injection molding.

scholarly journals An Innovative Lingual Retainer Wire Stabilizer

2020 ◽  
Vol 54 (4) ◽  
pp. 382-383
Author(s):  
Tivanani Venkata Durga Mahendra ◽  
Vyshnavi Mulakala
Keyword(s):  
Orthodontic Treatment ◽  
Soft Tissues ◽  
Critical Step ◽  
Stable Position ◽  
Custom Made ◽  
Iatrogenic Damage ◽  
Lingual Retainer

One of the means of maintaining the incisor alignment after orthodontic treatment is by fixed lingual retainer. Over the decade’s various techniques have been advocated for bonding a lingual retainer wire. The most critical step to the orthodontist is stabilization of retainer wire in its stable position to prevent relapse. The purpose of this study is to introduce a custom-made device which is easy to fabricate and stabilizes the retainer wire to the contours of the palatal surface of the teeth without causing any iatrogenic damage to the adjacent soft tissues while bonding.

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