A Clinical Evaluation of Materials for Interocclusal Registration in Centric Relation The following conditions for the record of posterior section were tested . The initial resistance of interocclusal recording materials to closure changed from N to N, and a rapid rise in the working time was seen in all elastomers. Statement of Problem: Interocclusal recording materials should have good dimensional stability for precise articulation. Purpose:The aim of this in vitro study.
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Comparison of five interocclusal recording materials.
Bite registration material, dimensional stability, interocclusal records. The pair of casts of each patient was first articulated manually in maximum intercuspation and fixed with rigid wooden rods and compound.
Figure 6 illustrates the differences between the measurements obtained with the interocclusal records and the standard measurements.
Despite its favorable properties, ZOE is a brittle material that strongly adheres to the dental surface due to contractions and, in the presence of excesses, it may suffer rupture and distortion and cause vertical displacement 9,17, There is a higher risk of distortion due to interference by the soft tissues of the margins, which can be compressed and may give origin to errors on cast mounting, if special attention is not taken during impression.
Interocclusal recording materials
recoording Comparison of five interocclusal recording materials. In a second stage, the records were interposed between the casts and fixed with wooden rods and compound, so that the measurements could be made. Therefore, the method permits the transposition of the results obtained to edentulous cases that require intermaxillary records for mounting in maximum intercuspation when the stability factors are not present, or in centric relation.
In cases of edentulous areas, the ZOE paste in combination with the register base recordung to dislocate the recordihg mucosa, resulting in articulator mounting with a slight vertical opening Data were analyzed statistically by analysis of variance and Tukey’s test for individual comparisons. Millstein PL, Hsu C. As an inclusion criterion, only individuals who had some teeth remaining in the mandibular arch up to premolars were selected, in order to allow manual articulation of the casts by the presence of tripod support and horizontal stability.
After magerials spray cooling, the records were removed and kept in a humidifier until for reading. In this study, the combination of acrylic resin and wax presented the lowest mean value of vertical separation between casts.
The mean percentage dimensional change at various time intervals: An in vitro study.
Comparison of five interocclusal recording materials.
Five patients with complete upper dentition and bilateral lower edentulousness were enrolled as volunteers for this study. In this study, the horizontal and vertical stability of the casts allowed their interoccluusal articulation in maximum intercuspation 1,3,4,6providing measurements that represented the standards for comparison to the different types of records evaluated.
However, statistically significant differences were not observed among the other materials.
Differential accuracy of elastomeric recording materials and associated weight change. A plastic typodont was modified with reference points for interarch measurements and articulated in maximum intercuspal position on a semiadjustable hinge articulator. Duralay acrylic resin is a material with great dimensional stability, rigidity, precision in the reproduction of details, ease of handling and favorable degree of hardness during the setting process, which does not offer resistance to mandibular closure 13, In all cases of prosthetic rehabilitation, accurate diagnosis, proper planning and correct execution of clinical and laboratory procedures are mandatory for high-quality results.
Linear dimensional change and accompanying weight change. Int J Prosthodont ; On the other hand, when large edentulous spaces are present, specifically in posterior free end cases, cast mounting is considerably more complex 7. Comparative evaluation of dimensional stability of three types of interocclusal inteeocclusal materials: Intermaxillary record with condensation silicone putty produced the fecording differences compared to manual articulation of the casts.
From the combination of materials investigated in this study, the following scale of fidelity can be settled from best to worst result: When maximum intercuspation is considered, in cases in which the number of teeth present is satisfactory and will provide cast stability, the casts can be mounted by manual articulation J Oral Rehabil ; A review of principles and techniques for making interocclusal records for mounting working casts.
A clinical evaluation of materials used in registering interjaw relationships. Differential accuracy of elastomeric recording materials and associated weight change. Maintenance of vertical dimension of occlusion was intrrocclusal checked by visualization of tripodism obtained by the anterior and posterior occlusal contacts. Karthikeyan K, Annapurni H. Five combinations of materials commonly used for intermaxillary records in cases of bilateral free end saddle were evaluated: Principles for selecting interocclusal records for articulation of rrcording and partially dentate casts.
A total of 30 samples were made with each group consisting of ten samples.
In conclusion, the combination of acrylic resin base and wax for interocclusal record yielded the least differences in comparison to the measurements obtained by manual articulation of the casts, i. Oral rehabilitation involves a sequence of steps that must be followed in a highly judicious manner. Polyvinyl siloxane is a more accurate interocclusal recording material when articulating digital models according to the process described in this study.
J Prosthet Dent ; I Group A 1 h J Prosthet Dent ; Figure 6 shows that the differences obtained with this combination mmaterials materials were more marked at the reference points 3, 4, 5 and 6. The materials were evaluated by measuring the vertical distance between pairs of reference points located on the bases of the upper and lower articulated casts.
Properties of interocclusal registration material. Study of the accuracy of different recording materials. The patients were instructed to occlude their teeth normally in maximum intercuspation. Related articles Bite registration material dimensional stability interocclusal records. Five cast pairs upper and lower arches were obtained for each patient, in such a way that each tested combination of materials would interocvlusal represented by a pair of casts with their own standard measurements for evaluation.
Furthermore, the lack of teeth that articulate with their antagonists poses an additional difficulty to recording and increases the need for accurate transfer of the interocclusal relationship and vertical dimension 8.
Braz Dent J ; The use of wax as a interocclusal recording material has been debated because it reportedly causes mandibular deflection, resistance to closure and distortions with changes in temperature 3,9,14, Warren K, Capp N. This article has been cited by.