Clinical Evaluation of Two Post Systems for Single Crown Restoration of Anterior Teeth

NCT07827755 | Not Yet Recruiting DMC

• 1 other identifier: CEBD-CU-2025-07-29
• Study Type: interventional
• Target: 84
• Locations: 1 country
• Sites: 1

Brief Summary

This randomized controlled trial evaluates two post systems used to restore endodontically treated (root canal treated) maxillary anterior teeth with 1-2 missing coronal walls. Participants will be randomly assigned to receive either a custom-adapted polyethylene fibers post (Ribbond-type, individually formed) or a prefabricated fiber post, followed by a composite core and crown restoration. The primary outcome is the distance between the post and the remaining root canal filling (gutta-percha), measured radiographically, which reflects how well the post adapts within the canal. The secondary outcome is post and restoration retention, assessed clinically using USPHS criteria. Participants will be followed for 6 months. The study aims to determine whether a custom-fitted fiber post provides better adaptation and retention compared to a standard prefabricated fiber post in teeth with significant structural loss.

Conditions

Cairo University; Nonvital Tooth

Keywords

Ribbond post; Prefabricated fiber post

Outcome Measures

Primary Outcomes (1)

• Post-Gutta-Percha Gap Distance

  Distance between the outer surface of the cemented post and the residual root canal filling (gutta-percha), measured radiographically at the coronal, middle, and apical thirds of the post space. Reported both as a continuous measurement (mm) and dichotomized as no gap versus any measurable gap.

  Immediately post-cementation (baseline)

Secondary Outcomes (1)

• Post and Restoration Retention

  6 months post-cementation

Study Arms (2)

Prefabricated Fiber Post with Composite Core

ACTIVE COMPARATOR

Participants receive a prefabricated fiber post, followed by a composite core build-up and definitive crown restoration.

Other: Custom-Fit UHMWPE Fiber Post with Composite Core

Custom-Fit UHMWPE Fiber Post with Composite Core

EXPERIMENTAL

Participants receive a custom-fit UHMWPE fiber post, individually adapted to the canal at chairside, followed by a composite core build-up and definitive crown restoration.

Other: Custom-Fit UHMWPE Fiber Post with Composite Core

Interventions

Custom-Fit UHMWPE Fiber Post with Composite Core OTHER

Participants receive a custom-fit UHMWPE fiber post, individually adapted to the canal at chairside, followed by a composite core build-up and definitive crown restoration.

Custom-Fit UHMWPE Fiber Post with Composite Core; Prefabricated Fiber Post with Composite Core

Eligibility Criteria

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

You may qualify if:

• Endodontically treated maxillary anterior teeth (incisors and/or canines)
• Presence of 1-2 missing coronal axial walls (mesial, distal, labial, and/or palatal), assessed at the cementoenamel junction (CEJ)
• Remaining sound tooth structure meeting minimum ferrule criteria: wall height ≥1.5-2 mm and circumferential thickness ≈1 mm
• Adequate root canal filling with no radiographic signs of periapical pathology
• Root length and canal morphology suitable for post space preparation
• Patients aged 20-40 years
• Willing and able to provide informed consent and attend follow-up visits

You may not qualify if:

• Teeth with 3 or more missing coronal axial walls (insufficient ferrule)
• Evidence of active periapical pathology, root fracture, or root resorption
• Insufficient remaining root length for adequate post retention
• Signs of periodontal disease affecting tooth prognosis (e.g., mobility, inadequate periodontal support)
• Systemic conditions contraindicating routine dental treatment
• Pregnancy (if radiographic follow-up is required)
• Inability to attend scheduled follow-up visits

Sponsors & Collaborators

• Cairo University: lead

Study Sites (1)

Faculty of Dentistry Cairo University

Cairo, Manial, 11553, Egypt

Location

Related Publications (3)

• Moezizadeh M, Shokripour M. Effect of fiber orientation and type of restorative material on fracture strength of the tooth. J Conserv Dent. 2011 Oct;14(4):341-5. doi: 10.4103/0972-0707.87194.

  PMID: 22144799 BACKGROUND

• de Morais DC, Butler S, Santos MJMC. Current Insights on Fiber Posts: A Narrative Review of Laboratory and Clinical Studies. Dent J (Basel). 2023 Oct 10;11(10):236. doi: 10.3390/dj11100236.

  PMID: 37886921 BACKGROUND

• Naim H, Ahmad M, Ageeli AA, Abuarab RK, Sayed ME, Dewan H, Chohan H, Alshehri AH, Wadei MHDA, Alqahtani SM, Feroz SMA, Porwal A, Alshahrani AA. Radiographic Evaluation of the Gap between Cemented Post and Remaining Gutta-Percha in Endodontically Treated Teeth Performed by Undergraduate Students: A Retrospective Cross-Sectional Study. Medicina (Kaunas). 2023 Mar 3;59(3):502. doi: 10.3390/medicina59030502.

  PMID: 36984502 BACKGROUND

MeSH Terms

Conditions

Tooth, Nonvital

Condition Hierarchy (Ancestors)

Dental Pulp Diseases; Tooth Diseases; Stomatognathic Diseases

Study Officials

• Mohamed labib zamzam, PHD

  Fixed Prosthodontics Faculty of Oral and dental medicine Cairo University

  STUDY DIRECTOR

• omnia nabil, PHD

  Fixed Prosthodontics Faculty of Oral and dental medicine Cairo University

  STUDY CHAIR

Central Study Contacts

Mohamed elsayed Bekhiet, Master Degree

CONTACT

+201224238808; Mohamed.Bekhet@dentistry.cu.edu.eg

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Masking Details: the biostatistician will be blinded
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assistant lecturer - Fixed prosthodontic department- Faculty of oral and dental medicine

Study Record Dates

• First Submitted: September 14, 2026
• First Posted: September 18, 2026
• Study Start: October 2, 2026
• Primary Completion (Estimated): February 1, 2027
• Study Completion (Estimated): March 1, 2027
• Last Updated: September 28, 2026

Record last verified: 2026-09

Data Sharing

• IPD Sharing: Will not share

Locations

EG (1)