View clinical trials related to Dental Occlusion.
Filter by:The overall aim is to evaluate the patient-reported outcome and efficiency of replacing posterior teeth with implant-supported crowns compared to RDPs and no treatment. Sub-aims are to evaluate a new 3D-methods for registration of occlusion and to test two crown designs. Thus, the study design has three aims: - To analyze patient perception including OHRQoL, when missing posterior teeth are replaced with implant-supported crowns compared to removable dental prostheses (RDPs) or no replacement. - To develop and validate new 3D digital methods for assessing occlusal contacts between upper and lower jaw and to analyze the methods relation to masticatory ability and efficiency. - To compare the difference in biological technical outcomes between splinted and non-splinted implant-supported crowns over time.
Computer-aided designs have considered dynamic occlusion with virtual articulator systems. However, the process involved is currently lengthy. The simplified transfer of casts from a mechanical to a virtual articulator has required bulky and expensive instruments. Recently, new methods based on mandibular motion tracking using optical devices have been introduced for integrating individual functional movement into occlusal morphology. The aim of this study: This study will clinically assess the reliability of the virtual reproduction of mandibular movement for detecting occlusal interferences and adjustments of designed and milled CAD-CAM zirconia crowns using a digital occlusal analyzer. Materials and methods: Intraoral optical impression will be made for thirteen selected patients with endodontically treated maxillary first premolars after abutment preparation followed by buccal and lateral interocclusal records taking. Two zirconia crowns will be fabricated for each patient following regular digital workflow with twenty six zirconia crowns, which will be allocated according to the virtual method of adjustment of occlusal interferences into two groups (Group I: Virtual occlusal interferences adjustment of CAD-CAM zirconia crowns using buccal interocclusal record (n=13) and Group II: Virtual occlusal interferences adjustment of CAD-CAM zirconia crowns using buccal and lateral interocclusal records (n=13)). Then milling and sintering of all crowns will be performed following the manufacturer's instructions. The occlusion of all crowns will be analyzed using an electronic pressure analyzer. All data will be statistically analyzed and discussed in light of the results obtained.
Regardless of the fabrication workflow occlusal adjustments seem to be inevitable during delivery of indirect fabrication of the restoration. This has been attributed to snowballing of discrepancies due to multiple procedures for information transfer between the clinician and the laboratory. Current digital workflows minimize these discrepancies due to digital acquisition technology which eliminates drawbacks from physical materials which would alter the dimensions and morphology of the final restoration. Utilizing 3D face scanning technology is by far the least invasive and the least time consuming of available virtual facebow techniques and thus it's utilization could offer the benefit of saving time during occlusal adjustment and enhanced strength of the restoration by not subjecting it to the heat generation and subsequent crack initiation which occurs during occlusal adjustment. This study aims to compare the effect of a face scan to alignment of the maxillary cast on the volume and time of occlusal adjustment compared to conventional articulator digitization to align the maxillary cast.
The development of a implantology leads to an increasing use of implants in the treatment of care for the loss of one or more teeth. The question is whether the existing guidelines, originally formulated for the occlusion of natural dentition and conventional prosthetic treatment can be applied to the implant prosthodonticsDue to initial differences in the vertical mobility of teeth and dental implants, present in the same dental arch, although the model of occlusion is ideal, undesirable premature occlusal contacts on the fixed dental restorations on implants may be present. Objective: To evaluate the effect of different head positions on dental occlusion of the natural teeth and fixed dental restorations on implants. Methods: Volunteers with complete dentition would be included in this study as the Control Group. The Study Group would include subjects with fixed dental restorations on implants in the transcanine region. A T Scan III System will be used for occlusal analysis.
Aim: The aim of this study is to compare the T-Scan digital occlusal analysis system and the occlusal analysis mode of the CEREC Omnicam system, which is mainly used for design/ production, using the data recorded at the centric occlusion position. Material-Method: Occlusal recordings were obtained from healthy 20 females and 20 males aged 18-25 at the centric occlusion position. Records were saved as .jpeg format and transferred to Adobe Photoshop CS6 program. Blue, green, and red colors (shown by the same color codes in both systems) representing light, intense and tight contacts, respectively, were evaluated in terms of the pixel counts. For statistical comparison the differences between the systems Independent Sample T-Test and, between the genders, One Sample T- Test were used (α = 0.05).