Clinical Evaluation of Teeth Prepared With Vertical Preparation Versus Deep Chamfer

NCT05252689 | Completed

• 1 other identifier: CEBD-CU-2019-9-2
• Study Type: interventional
• Target: 40
• Locations: 1 country
• Sites: 1

Brief Summary

It has been demonstrated that a great amount of tooth structure is lost during the prosthetic preparations of abutments for full-coverage FDPs with tooth substance removal of 63% of 73%, this aggressive loss of tooth structure usually accompanied with pain and post-operative sensitivity. In comparison with the vertical preparation technique, there is less amount of tooth substance loss. this clinical study will provide benefits for practitioners and clinicians by guiding them to choose a more conservative treatment plan with the better marginal fit, clinical performance and satisfaction for the patients on the long term. rather than other benefits like less chair time, less risk for pulp injury, less time and cost

Conditions

Single Posterior Crowns; Endodontically Treated Teeth; Decayed Teeth

Outcome Measures

Primary Outcomes (1)

• Marginal adaptation

  Assessed using the modified usphs criteria by Discrete (scores) Alpha (A) No visible evidences of crevice along the margins; no catch or penetration of the explorer. Bravo (B) Visible evidence of crevice and/or catch of explorer; no penetration of the explorer. Charlie (C) Visible evidence of crevice and penetration of the explorer.

  1 year

Secondary Outcomes (3)

• Fracture of the restoration

  1 year

• gingival inflammation

  1 year

• Recurrent caries

  1 year

Other Outcomes (1)

• Patient satisfaction

  1 year

Study Arms (2)

monolithic zirconia single posterior crowns with deep chamfer finish line

ACTIVE COMPARATOR

monolithic zirconia single posterior crowns with deep chamfer finish line fabricated by cad cam machine and cemented by self adhesive resin cement.

Other: monolithic zirconia single posterior crowns with deep chamfer finish line

monolithic zirconia single posterior crowns with vertical finish line

EXPERIMENTAL

monolithic zirconia single posterior crowns with vertical finish line fabricated by cad cam machine and cemented by self adhesive resin cement.

Other: monolithic zirconia single posterior crowns with vertical finish line

Interventions

monolithic zirconia single posterior crowns with deep chamfer finish line OTHER

deep chamfer of 1 mm average thickness for cervical finish line, a convergence angle of 6-12° on each side and up to 20° total, in some studies, is acceptable and occlusal reduction of 1,5-2 mm

monolithic zirconia single posterior crowns with deep chamfer finish line

monolithic zirconia single posterior crowns with vertical finish line OTHER

using special round-ended 2 degrees tapered diamond burs a non-working tip (batt bur). It has coronal diameter of 1.2 mm, apical diameter of 0.7 mm, and non- cutting end of 1 mm, which reduces or avoids damage to the connective attachment and allows a tooth-guided preparation procedure

monolithic zirconia single posterior crowns with vertical finish line

Eligibility Criteria

• Age: 20 Years - 40 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

• The patients in this study will be in the range of 18-50 years
• Have no active periodontal or pulpal diseases, have teeth with good restorations
• Psychologically and physically able to withstand conventional dental procedures
• Able to return for follow-up examinations and evaluation
• No tooth mobility or grade 1 can be accepted
• Patients with teeth problems indicated for single posterior crowns:
• Badly decayed teeth
• Teeth restored with large filling restorations
• Endodontically treated teeth
• Malformed teeth
• Malposed teeth (Tilted, over-erupted, rotated, etc.)
• Spacing between posterior teeth

You may not qualify if:

• Patients under the age of 18 or being incapable of taking out a contract
• Patient with active resistant periodontal diseases
• Patients with any medical condition that impaired correct oral hygiene
• a conspicuous medical or psychological history
• bruxism, or known allergic reaction to the materials used.
• pregnant female patients

Sponsors & Collaborators

• Cairo University: lead

Study Sites (1)

Cairo University

Cairo, Egypt

Location

MeSH Terms

Conditions

Tooth, Nonvital; Dental Caries

Condition Hierarchy (Ancestors)

Dental Pulp Diseases; Tooth Diseases; Stomatognathic Diseases; Tooth Demineralization

Study Officials

• Maha Taymour, PhD

  Cairo University

  STUDY DIRECTOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: PARTICIPANT, OUTCOMES ASSESSOR
• Masking Details: double blind
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assistant lecturer

Study Record Dates

• First Submitted: February 14, 2022
• First Posted: February 23, 2022
• Study Start: March 1, 2020
• Primary Completion: March 1, 2021
• Study Completion: July 1, 2021
• Last Updated: April 26, 2022

Record last verified: 2022-04

Data Sharing

• IPD Sharing: Will not share

Locations

EG (1)