Clinical Assessment of Endodontically Treated Posterior Teeth Prepared With Two Occlusal Designs and Two Ceramic Full Coverage Restorations

Clinical Assessment of Endodontically Treated Posterior Teeth Prepared With Two Occlusal Designs and Two Ceramic Full Coverage Restorations (Randomized Clinical Trial)

Status

Active, not recruiting

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT06695091

Enrollment

Registered

2024-11-19

Start date

2020-09-12

Completion date

2025-12-12

Last updated

2024-11-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Clinical Behavioral

Keywords

Lithium disilicate, Zirconia, All-ceramic crowns

Brief summary

The aim of this study was to assess the impact of flat occlusal preparation design (FOD) of endodontically treated molars on the fracture resistance and distribution of stresses among a ceramic crown-molar structure when compared to two planes occlusal preparation design (TOD).

Interventions

PROCEDUREMonolithic zirconia crown

All-ceramic crown

PROCEDUREMonolithic lithium disilicate crown

All-ceramic crown

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

DOUBLE (Subject, Outcomes Assessor)

Masking description

Triple blinded: The trial participants, the outcome assessors and the data analysis statistician are blinded

Eligibility

Sex/Gender

ALL

Age

20 Years to 50 Years

Healthy volunteers

Yes

Inclusion criteria

* Patients with posterior root canal treated teeth that require full coverage restoration. * 20 - 50 years old. * Males or Females. * Good oral hygiene. * Presence of favorable occlusion and teeth are in normal alignment with the adjacent teeth. * Patients agreed to return to follow-up evaluation.

Exclusion criteria

* Active periodontal or pulpal diseases. * Lack of opposing dentition. * Severe medical complications. * Pregnancy. * Lack of compliance. * Evidence of parafunctional habits * Temporomandibular joint disorders

Design outcomes

Primary

Measure	Time frame	Description
Fracture	12 months	Using Modified United States Public Health Service (USPHS) criteria

Secondary

Measure	Time frame	Description
Marginal adaptation	12 months	Using Modified United States Public Health Service (USPHS) criteria
Marginal discoloration	12 months	Using Modified United States Public Health Service (USPHS) criteria
Secondary caries	12 months	Using Modified United States Public Health Service (USPHS) criteria

Countries

Egypt

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026