Clinical Evaluation of Teeth Prepared With Vertical Preparation Versus Deep Chamfer

NCT ID: NCT05252689

Last Updated: 2022-04-26

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 40 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2020-03-01
• Study Completion Date: 2021-07-01

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

Detailed Description

A healthy relationship between dental restorations and the periodontium is of prime importance for the clinical longevity and esthetic harmony of full coverage restorations . One of the Most Common complications, derived from fixed prostheses is gingival recession, which constitutes an important clinical concern. This problem is largely associated with iatrogenic effects produced during dental preparation or as a result of poor prosthetic fit which can cause chronic inflammation leading to gingival margin recession around the restoration .

Conditions

Single Posterior Crowns; Endodontically Treated Teeth; Decayed Teeth

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: DOUBLE

Study Groups

monolithic zirconia single posterior crowns with deep chamfer finish line

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

Group Type: ACTIVE_COMPARATOR

monolithic zirconia single posterior crowns with deep chamfer finish line

Intervention Type: 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 vertical finish line

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

Group Type: EXPERIMENTAL

monolithic zirconia single posterior crowns with vertical finish line

Intervention Type: 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

Interventions

monolithic zirconia single posterior crowns with deep chamfer finish line

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

Intervention Type: OTHER

monolithic zirconia single posterior crowns with vertical finish line

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

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

1. The patients in this study will be in the range of 18-50 years

2. Have no active periodontal or pulpal diseases, have teeth with good restorations

3. Psychologically and physically able to withstand conventional dental procedures

4. Able to return for follow-up examinations and evaluation

5. No tooth mobility or grade 1 can be accepted

6. Patients with teeth problems indicated for single posterior crowns:

1. Badly decayed teeth

2. Teeth restored with large filling restorations

3. Endodontically treated teeth

4. Malformed teeth

5. Malposed teeth (Tilted, over-erupted, rotated, etc.)

6. Spacing between posterior teeth

Exclusion Criteria

1. Patients under the age of 18 or being incapable of taking out a contract

2. Patient with active resistant periodontal diseases

3. Patients with any medical condition that impaired correct oral hygiene

4. a conspicuous medical or psychological history

5. bruxism, or known allergic reaction to the materials used.

6. pregnant female patients

• Minimum Eligible Age: 20 Years
• Maximum Eligible Age: 40 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Cairo University

OTHER

Sponsor Role: lead

Responsible Party

Mai Salah Ibrahim Afifi Elgohary

Assistant lecturer

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Maha Taymour, PhD

Role: STUDY_DIRECTOR

Cairo University

Locations

Cairo University

Cairo, , Egypt

Countries

Egypt

Other Identifiers

CEBD-CU-2019-9-2

Identifier Type: -

Identifier Source: org_study_id