Virtual Reproduction of Mandibular Movement for Assessing Occlusal Interferences and Adjustments

NCT ID: NCT06272474

Last Updated: 2024-02-22

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 26 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-09-11
• Study Completion Date: 2023-12-09

Brief Summary

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.

Conditions

Dental Occlusion

Study Design

• Allocation Method: NON_RANDOMIZED
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: DIAGNOSTIC
• Blinding Strategy: NONE

Study Groups

Buccal interocclusal records

Group Type: ACTIVE_COMPARATOR

CAD-CAM zirconia crowns using buccal interocclusal record.

Intervention Type: OTHER

Virtual occlusal interferences adjustment of CAD-CAM zirconia crowns using buccal interocclusal record.

First, scanning the buccal interocclusal record for each patient with the two arches in maximum intercuspation position (MIP) will be performed. The IOS will immediately reproduce the occlusal state of the digital casts; this method is called the buccal bite registration method (BBR).

Lateral interocclusal records

Group Type: EXPERIMENTAL

CAD-CAM zirconia crowns using lateral interocclusal records.

Intervention Type: OTHER

Virtual occlusal interferences adjustment of CAD-CAM zirconia crowns using lateral interocclusal record.

A second scan will be performed for each patient to record lateral mandibular excursion. Then, three STL files will be exported; maxillary arch, mandibular arch at MIP and lateral mandibular excursion

Interventions

CAD-CAM zirconia crowns using buccal interocclusal record.

Virtual occlusal interferences adjustment of CAD-CAM zirconia crowns using buccal interocclusal record.

First, scanning the buccal interocclusal record for each patient with the two arches in maximum intercuspation position (MIP) will be performed. The IOS will immediately reproduce the occlusal state of the digital casts; this method is called the buccal bite registration method (BBR).

Intervention Type: OTHER

CAD-CAM zirconia crowns using lateral interocclusal records.

Virtual occlusal interferences adjustment of CAD-CAM zirconia crowns using lateral interocclusal record.

A second scan will be performed for each patient to record lateral mandibular excursion. Then, three STL files will be exported; maxillary arch, mandibular arch at MIP and lateral mandibular excursion

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

The patient presented with successful endodontically treated maxillary 1st premolar.

• Patients having class I occlusion.
• Good oral hygiene with no signs of periapical pathology or periodontal disease(24).
• Patient having natural teeth as opposed to dentition.

Exclusion Criteria

• Pregnancy, which prevents the use of diagnostic x-rays.
• Parafunctional habits.
• Mobility in the abutment teeth more than grade 1.
• Patient presenting allergy to materials being used.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 35 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Hams Hamed Abdelrahman

OTHER

Sponsor Role: lead

Responsible Party

Hams Hamed Abdelrahman

Assistant lecturer of DPH and Clinical statistician

Responsibility Role: SPONSOR_INVESTIGATOR

Locations

Alexandria Faculty of Dentistry

Alexandria, , Egypt

Countries

Egypt

Other Identifiers

0266-07/2021 - 18/07/2021

Identifier Type: -

Identifier Source: org_study_id