Endocrown and 90° Shoulder Endocrown

Nanfang Hospital, Southern Medical University

Status: Unknown

Conditions: Endocrown Restoration

Treatments: Procedure: endocrown restoration; Procedure: 90° shoulder endocrown restoration

Study type: Interventional

Funder types: Other

Identifiers

NCT03398395

NFEC-2017-141

Details and patient eligibility

About

Use chairside Computer-Aided Design & Computer-Aided Manufacturing(CAD/CAM) system (computer aided design / manufacture), using glass ceramic zirconia enhanced lithium silicate glass ceramics (VITA, SUPRINITY, VS) material, compare the difference of firmness, comfort and durability between two kinds of root canal restoration methods:endocrown and 90° shoulder endocrown. Objective to establish the optimal method and material for the restoration of the teeth with root canal therapy.

Enrollment: 200 estimated patients

Sex: All

Ages: 18 to 60 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

1. 18-60 year old patients with healthy body, the tooth is molar, root tip no obvious damage, no root fracture by X-ray;
2. after complete root canal therapy, the remaining 4 wall intact tooth tissue;
3. after complete root canal therapy, the remaining 3 wall intact tooth tissue;
4. have good oral hygiene habits;
5. agreed to participate in the trial and signed the informed consent form;
6. patients who are not participating in other clinical trials;
7. after completion of the repair, compliance with the USPHS evaluation criteria of marginal density class A cases

Exclusion criteria

1. obvious destruction of the apical tissue and large cysts;
2. severe periodontitis patients;
3. oral malignant tumor patients;
4. radiotherapy patients;
5. pregnant women;
6. patients with mental illness or systemic diseases;
7. people who can not take care of themselves;
8. the researchers believe that is not suitable for the test.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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200 participants in 2 patient groups

endocrown restoration

Active Comparator group

Description:

a cervical margin in the form of a butt joint and a preparation of the pulp chamber that does not extend into the root canals.

Treatment:

Procedure: endocrown restoration

90° shoulder endocrown restoration

Active Comparator group

Description:

a 90°cervical margin in the form of a butt joint and a preparation of the pulp chamber that does not extend into the root canals.

Treatment:

Procedure: 90° shoulder endocrown restoration