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

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.

Inclusion Criteria: * 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 Exclusion Criteria: * 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