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PubMed1979

[Prosthetics].

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Dental Impression Materials↗
PubMed2005

Anatomy of a properly taken toothprints thermoplastic bite impression.

The Toothprints thermoplastic bite impression technique, like most procedures in clinical practice, is technique-sensitive. The biometric information available from the thermoplastic wafer is directly proportional to the care with which the technique is performed, as well as the cooperation and understanding of the child. Although the amount of information and the detail we obtain with the impression of only a few teeth (tooth size and occlusal anatomy are able to be digitized to 50 microns), along with saliva for scent dog tracking and cellular DNA analysis, it is a properly taken full-arch bite impression that would provide the best opportunity for infinite concordant matches for identification, should the need arise. With that in mind, below are the steps for properly taking a full-arch bite impression.

Child↗
PubMed2001

[The global impression technic in fixed dentures].

The global impression technique allows to obtain in a single stage the impression of the abutment as well as their neighboring teeth. This technique often requires the placement of one or two retraction cords in the sulcus. The impression technique herein described is the double mix method. This method is based on the use of two elastomers with different viscosities, but from the same group thus allowing a simultaneous polymerization.

Dental Abutments↗
PubMed2001

[Impression technics in implantology].

The implant-borne prostheses have become an integral part of the oral rehabilitation procedures. The aim of this article is to describe the most current impression techniques for oral implant prosthetics used at the University of Liège, Belgium. Impression protocols adapted to various prosthetic procedures are described step-by-step through several clinical cases. Emphasis is put on the means necessary for achieving a precise adaptation and a passive fit of the final prosthetic suprastructure.

Cementation↗
PubMed2001

[Impressions in removable partial dentures].

The success of a removable partial denture, the comfort for the patient, stability and especially the psychological acceptance depend on a series of essential technicals factors. Probably the more delicate stage of the prosthetic technology is the transfer of informations from the mouth of the patient to the prothesist through the impression. In removable partial denture, impression have to take account into the balance between uncompressible hard tissue and soft structures with variable compressibilities. The diversity of clinical cases is responsible for a large diversity of techniques. The aim of this article is to describe the more common technics used in every day practice.

Dental Impression Materials↗
PubMed2001

[Impression technics in complete removable dentures].

The main objective of a complete removable denture is to re-establish the function and aesthetics that lead to an acceptable soft tissue as well as psychologic integration. The fabrication of complete removable denture is a rather complex procedure being composed of several clinical and laboratory steps. All these steps are interdependant and governed by a certain level of empirism. The impression taking, the first part of the procedure, is crucial for the success of the whole prosthetic rehabilitation. The aim of this article is to describe in detail the impression taking procedures for complete removable dentures, in order to help solve a number of pitfalls encountered in daily clinical practice.

Calcium Sulfate↗
PubMed2005

An accurate, single, platform-level impression technique for the fabrication of prosthetic restorations on dental implants.

The possibility of restorative inaccuracies increases with the number of impressions taken and subsequent models poured. Herein we describe a unique, splinted, dual-arch pick-up impression technique using abutment components instead of transfer copings. In our experience, this permits the fabrication of a definitive restoration as a result of a single impression.

Dental Abutments↗
PubMedDate not supplied

Impression success using the dual arch technique.

Taking an accurate impression and pouring a model that duplicates the clinical situation is the goal of every restorative dentist. The chance of having a restoration that fits the tooth properly increases as more care, skill, and judgment are applied to these early steps in restoration construction. When used as described above with any of the trays mentioned, the dual arch impression technique can be of great value in restorative dentistry.

Dental Arch↗
PubMed2005

Accuracy of intraoral data acquisition in comparison to the conventional impression.

The achievable accuracy is a decisive parameter for the comparison of direct intraoral digitization with the conventional impression. The objective of the study was therefore to compare the accuracy of the reproduction of a model situation by intraoral digitization vs. the conventional procedure consisting of impression taking, model production, and extraoral digitization. Proceeding from a die model with a prepared tooth 16, the reference data set of the teeth 15, 16 and 17 was produced with an established procedure by means ofextraoral digitization. For the simulated intraoral data acquisition of the master model (Cerec 3D camera, Sirona, Bensheim), the camera was fastened on a stand for the measurement and the teeth digitized seven times each in defined views (occlusal, and in each case inclined by 20 degrees, from the mesio-proximal, disto-proximal, vestibular and oral aspect). Matching was automated (comparative data sets B1-B5). A clinically perfect one-step putty-and-wash impression was taken from the starting model. The model produced under defined conditions was digitized extraorally five times (digi-SCAN, comparative data sets C1-C5). The data sets B1-B5 and C1-C5 were assigned to the reference data set by means of best-fit matching and the root of the mean quadratic deviation (RMS; root mean square) calculated. The deviations were visualized, and mean positive, negative and absolute deviations calculated. The mean RMS was 27.9 microm (B1-B5) or 18.8 microm (C1-C5). The mean deviations for the prepared tooth were 18 microm/-17 microm (B1-B5) and 9 microm /-9 microm (C1-C5). For tooth 15, the mean deviations were 22 microm/-19 microm (B1-B5) and 15 microm/-16 microm (C1-C5). The intraoral method showed good results with deviations from the CAD starting model of approx. 17 microm, related to the prepared tooth 16. On the whole, in this in-vitro study, extraoral digitization with impression taking and model production showed higher accuracy than intraoral digitization. Since the inaccuracies in the conventional impression under real clinical conditions may be higher than the values determined above, a comparison under clinical conditions should be performed subsequently.

Bicuspid↗
PubMedDate not supplied

[The characteristics of obtaining functional impressions under unfavorable conditions of the prosthetic bed of the edentulous mandible].

The results of treatment of 680 patients with a drastic atrophy of the alveolar portion of the toothless mandible evidence the advantages of the method for making functional casts, suggested by the authors. This method is based on anatomic features of the denture bed, topography and function of the mimic and masticatory muscles. Making of a preliminary cast is described in detail, as is the preparation of a model, making an individual spoon and the final functional cast.

Aged↗