Virtual Reproduction of Mandibular Movement for Assessing Occlusal Interferences and Adjustments

NCT06272474 | Completed

• 1 other identifier: 0266-07/2021 - 18/07/2021
• Study Type: interventional
• Target: 26
• Locations: 1 country
• Sites: 1

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

Outcome Measures

Primary Outcomes (2)

• Static occlusal interference

  it is measured at patient's maximum intercuspation using occlusense device

  Through study completion, average 12 months

• Dynamic occlusal interference

  it is measured at patient's lateral mandibular movement using occlusense device

  Through study completion, average 12 months

Study Arms (2)

Buccal interocclusal records

ACTIVE COMPARATOR

Other: CAD-CAM zirconia crowns using buccal interocclusal record.

Lateral interocclusal records

EXPERIMENTAL

Other: CAD-CAM zirconia crowns using lateral interocclusal records.

Interventions

CAD-CAM zirconia crowns using buccal interocclusal record. 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).

Buccal interocclusal records

CAD-CAM zirconia crowns using lateral interocclusal records. 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

Lateral interocclusal records

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

• 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.

You may not qualify if:

• 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.

Sponsors & Collaborators

• Hams Hamed Abdelrahman: lead

Study Sites (1)

Alexandria Faculty of Dentistry

Alexandria, Egypt

Location

MeSH Terms

Conditions

Bites and Stings

Condition Hierarchy (Ancestors)

Poisoning; Chemically-Induced Disorders; Wounds and Injuries

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: DIAGNOSTIC
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Assistant lecturer of DPH and Clinical statistician

Model Details: Single group is receiving the two interventional arms

Study Record Dates

• First Submitted: February 15, 2024
• First Posted: February 22, 2024
• Study Start: September 11, 2022
• Primary Completion: December 9, 2023
• Study Completion: December 9, 2023
• Last Updated: February 22, 2024

Record last verified: 2024-02

Locations

EG (1)