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International Journal of Computerized Dentistry

Marcus Seiler, Peer W Kämmerer, Michael Peetz, Amely Hartmann
Missing or reduced buccal bone plates and a reduced vertical dimension still represent challenges in bone grafting and require a three-dimensional (3D) reconstruction. The protocol presented in this short technical note describes the clinical application of a patient-specific, titanium lattice structure for customized bone regeneration (CBR). A 3D projection of the bony defect is generated, and an individualized titanium lattice structure designed using computer-aided design/computer-aided manufacturing (CAD/CAM) procedures and rapid prototyping...
2018: International Journal of Computerized Dentistry
Karl-Friedrich Krey, Anja Ratzmann, Philine Henriette Metelmann, Marcel Hartmann, Sebastian Ruge, Bernd Kordaß
OBJECTIVE: In most cases, according to our treatment concept, a presurgical orthodontic treatment (POT) is performed on patients with cleft lip and palate (CLP). The aim of this case report is to demonstrate a completely digital workflow for the production of a palate plate. MATERIALS AND METHODS: For the assessment of the maxillary arch, a digital impression of the jaw was made on two patients with an intraoral scanner (Cerec Omnicam Ortho). After reconstruction of a virtual model from the scan data, appropriate areas of the jaw could be blocked out and a plate constructed...
2018: International Journal of Computerized Dentistry
Harald Steinbrenner
Vita Enamic is a durable hybrid ceramic that can be processed with efficient computer-aided design/computer-aided manufacturing (CAD/CAM) support. The porous sintered feldspar ceramic block that is infiltrated with polymer does not require a ceramic furnace after being ground out. Instead, it only needs to be finished and polished. This makes one-time chairside treatment possible. In addition to the well-known monochromatic Vita Enamic blocks, a multichromatic version with integrated shade gradient and a super-translucent version have been developed...
2018: International Journal of Computerized Dentistry
Elmar Frank, Dietmar Frank
This study evaluates the symmetry of initial proposals for anterior tooth restorations delivered by the Cerec software. By using a symmetric preparation model and a special angulation gauge for restoration axes, the study proves that the restoration proposals are symmetric with respect to the median sagittal plane.
2018: International Journal of Computerized Dentistry
Yun Zou, Jing Bai, JingZhou Xiang
OBJECTIVE: To clinically evaluate computer-aided design/computer-aided manufacturing (CAD/CAM)-fabricated molar endocrowns after 6 months and 1, 2, and 3 years of clinical service. MATERIALS AND METHODS: 289 patients with 321 molars (267 patients with one endocrown, two patients with two endocrowns, and ten patients with three endocrowns) exhibiting extensive coronal loss of substance participated in the study. Endocrown preparations were scanned, and endocrowns designed and machined with the Cerec CAD/CAM system...
2018: International Journal of Computerized Dentistry
Sven Mühlemann, Goran I Benic, Vincent Fehmer, Christoph H F Hämmerle, Irena Sailer
PURPOSE: The aim of this clinical study was to test whether or not digital workflows for the fabrication of crowns render different clinical outcomes from the conventional pathway with respect to (1) crown quality, and (2) time efficiency. MATERIAL AND METHODS: For each of the 10 patients in need of one tooth-supported crown, five monolithic crowns were produced out of lithium disilicate reinforced glass ceramic. Four different optical impression and associated computer-aided design/computer-aided manufacturing (CAD/CAM) systems were used for crown fabrication (digital workflows): (1) Lava C...
2018: International Journal of Computerized Dentistry
Albert Mehl
Different concepts are used for the analysis and transfer of mandibular movements to virtual or conventional articulating systems. Some common procedures and analyses include the determination of the terminal hinge axis. However, despite the widespread use of different methods for hinge axis determination, very little information on the applicability and quality of these methods is currently available in the literature. The aim of this study was to provide an overview of the methods already being applied and to search for novel algorithmic methods, comparing them with respect to achievable accuracy and indication...
2018: International Journal of Computerized Dentistry
Leandro Passos, Ysidora Torrealba, Bernard Linke, Alexandre Street, Sheila Passos
PURPOSE: The aim of this study was to investigate the fracture strength of computer-aided design/computer-aided manufacturing (CAD/CAM) posterior ceramic crowns with and without post-milling manual enhancement of occlusal morphology (MEOM), as indicated especially with early CAD/CAM restorations that have limited capacity to generate natural occlusal morphology. MATERIALS AND METHODS: A mandibular molar of an acrylic tooth model was prepared to receive a CAD/CAM all-ceramic crown and was used as a master die to fabricate 80 prepared tooth replicas using an epoxy resin with an elastic modulus (E) of 18 GPa...
2018: International Journal of Computerized Dentistry
Klaus Wiedhahn
No abstract text is available yet for this article.
2018: International Journal of Computerized Dentistry
João Pitta, Vincent Fehmer, Irena Sailer, Stefan P Hicklin
The development of titanium bonding bases allows for the use of implant-supported monolithic reconstructions in a digital workflow. Different base configurations are available according to each clinical indication. In this case report, the selection of titanium bonding bases for crowns was considered for a multiple-unit fixed dental prosthesis (FDP).
2018: International Journal of Computerized Dentistry
Arndt Happe, Vincent Fehmer, Insa Herklotz, Hans-Joachim Nickenig, Irena Sailer
Three-dimensional (3D) implant positioning is an important prognostic factor for anterior dental implants. Modern 3D imaging and implant treatment planning systems are available today for precise dental implant planning and placement. The transfer of implant position information to industrially manufactured templates for guided implant surgery has been possible for years now. What is new is the possibility of combining the datasets with the surface scan data of a diagnostic wax-up and setup for prosthetic-driven implant planning...
2018: International Journal of Computerized Dentistry
Sigmar Schnutenhaus, Ulf Neveling, Ralph G Luthardt
The rehabilitation of the edentulous jaw using angulated implants and screw-retained retrievable fixed prosthetic dentures is a well-established treatment method. Possible advantages include the option to avoid bone augmentation, to provide an immediate long-term provisional restoration, and, where appropriate, to perform a minimally invasive procedure. A variety of prosthodontic solutions are available for the definitive restoration, not least allowing the patient's financial situation to be accommodated. Implementing this concept requires systematic planning and an exacting surgical procedure...
2018: International Journal of Computerized Dentistry
Oliver Schubert, Florian Beuer, Jan-Frederik Güth, Ephraim Nold, Daniel Edelhoff, Isabel Metz
The irreversible trend toward digitization in dentistry and dental technology has resulted in technical progress and continuous changes to conventional workflows. In particular, implantology and prosthetics have benefited from a multitude of interesting new possibilities. Three-dimensional (3D) computed radiography and digital surface scanning can be invaluable in terms of backward planning and making implant surgery and denture fabrication more predictable. In this context, two digital implant-prosthetic treatment strategies are presented that allow for an efficient digital workflow while ensuring a minimally invasive surgical procedure...
2018: International Journal of Computerized Dentistry
Su-Jin Jin, Il-Do Jeong, Ji-Hwan Kim, Woong-Chui Kim
OBJECTIVE: This study evaluated the accuracy (trueness and precision) of dental models fabricated using additive manufacturing (AM) methods such as PolyJet and fused deposition modeling (FDM). MATERIALS AND METHODS: 10 stone models were acquired for the control group by scanning a complete arch model. For the experimental groups, 10 PolyJet models and 10 FDM models were fabricated from digital impressions using an intraoral scanner. All 30 models were then scanned, and root mean square values were measured using three-dimensional (3D) analysis software...
2018: International Journal of Computerized Dentistry
Sigmar Schnutenhaus, Valerie von Koenigsmarck, Sarah Blender, Laura Ambrosius, Ralph G Luthardt, Heike Rudolph
OBJECTIVE: The insertion of implants through template-guided surgery is an established method. At the present time, the static navigation is based on sleeves integrated into the guides, through which drill bits of the corresponding size are passed. The present clinical trial is designed to test a new sleeveless system to determine the precision of implant insertion for one-piece ceramic implants. MATERIALS AND METHODS: For 12 patients, implant bed preparation and the insertion of the implants were done using a sleeveless implant guide...
2018: International Journal of Computerized Dentistry
Philip L B Tan, Danielle M Layton, Susan L Wise
Implant placement requires precise planning and execution to avoid collision with critical anatomical structures. Technology advances may improve placement outcomes. The purpose of this study was to trial and measure in an in vitro environment the accuracy of placing a single dental implant in the planned position using a specific guided surgery technique compared with a freehand surgery technique. The dental model of a patient missing tooth 16 was printed 30 times (EnvisionTEC 3Dent). Each print was scanned (TRIOS color scanner) to create a 3D surface model, and radiographed (Gendex CB-500) to create cone beam computed tomography (CBCT) data...
2018: International Journal of Computerized Dentistry
Florian Beuer
No abstract text is available yet for this article.
2018: International Journal of Computerized Dentistry
Andreas Kurbad
When determined by conventional jaw relation recording methods, the real position of the condyle remains largely unclear because the geometric relationship between the reference point and the position of the condyle is unknown. Sicat Function combines cone beam computed tomography (CBCT) data with digital jaw motion tracking (JMT) data and digital intraoral surface data. It is thus capable of measuring and visualizing patient-specific jaw movements. The corresponding patient-specific treatment position can be defined and integrated in various therapeutic appliances, eg, repositioning splints designed to increase the vertical dimension of occlusion (VDO)...
2018: International Journal of Computerized Dentistry
Josef Schweiger, Juliane Stumbaum, Daniel Edelhoff, Jan-Frederik Güth
The rehabilitation of the edentulous patient with complete dentures is still an essential aspect of dental prosthetics. Modern digital manufacturing technologies have made it possible to produce even complete dentures digitally. This has several advantages, especially regarding the properties of the denture material. In addition, the use of digital technology facilitates new treatment concepts and procedures that reduce the number of appointments needed at the dental office.
2018: International Journal of Computerized Dentistry
Mustafa Arslan, Sema Murat, Gulce Alp, Ali Zaimoglu
PURPOSE: The objectives of this in vitro study were to evaluate the flexural strength (FS), surface roughness (Ra), and hydrophobicity of polymethylmethacrylate (PMMA)-based computer-aided design/computer-aided manufacturing (CAD/CAM) polymers and to compare the properties of different CAD/CAM PMMA-based polymers with conventional heat-polymerized PMMA following thermal cycling. MATERIALS AND METHODS: Twenty rectangular-shaped specimens (64 × 10 × 3.3 mm) were fabricated from three CAD/CAM PMMA-based polymers (M-PM Disc [M], AvaDent Puck Disc [A], and Pink CAD/CAM Disc Polident [P], and one conventional heat-polymerized PMMA (Promolux [C]), according to ISO 20795-1:2013 standards...
2018: International Journal of Computerized Dentistry
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