NCT04653519

Accuracy and Reproducibility of Virtually Guided Minimally Invasive Tooth Preparations Using Reverse Engineering

Accuracy and Reproducibility of Virtually Guided Minimally Invasive Tooth Preparations Using Reverse Engineering (Controlled Clinical Trial)

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 10 (estimated)
• Sponsor: Alexandria University · Academic / Other
• Sex: All
• Age: 18 Years – 45 Years
• Healthy volunteers: Not accepted

Summary

The aim of the study is to assess and reproduce standardized virtually guided minimally invasive tooth preparations using digitally designed occlusal template, compared to its reference virtual preparation using a computer aided 3-dimensional (3-D) analysis, and to investigate the effect of these preparations on absolute marginal discrepancy of 3 unit monolithic translucent zirconia FPD using a computer aided 3-D analysis.

Detailed description

Ten patients with missing mandibular first molar will receive a three-unit full contour monolithic zirconia FPD. Each patient case will receive two modes of preparation as in the previous in-vitro study: virtually guided tooth preparation using occlusal resin template to assist the intraoral preparation and the reference virtual tooth preparation. Each participant's preparation will be evaluated using diagnostic dental software and will be compared to a reference digital virtual preparation using 3-D mesh processing reverse engineering metrology software.

Conditions

• Marginal Adaptation of Fixed Dental Prosthesis

Interventions

Type	Name	Description
DEVICE	Virtually guided minimally invasive preparation	Intraoral virtually guided minimally invasive design with an occlusal reduction of 1.5mm, axial reduction will be performed with 6 degrees axial taper and a circumferential chamfer margin of 0.5mm in width and 0.5mm coronal to the gingival margin. A milled guiding occlusal resin template of the teeth will be checked for fitting then fixed using spot etching and will be used to guide the amount of axial reductions and taper degree.

Timeline

• Start date: 2020-09-20
• Primary completion: 2021-09-01
• Completion: 2022-01-01
• First posted: 2020-12-04
• Last updated: 2020-12-04

Locations

1 site across 1 country: Egypt