29-year-old male, presented to the dental clinic with a complaint of a broken upper front tooth.
He reported the fracture occurred three weeks ago following an accidental fall. He mentioned that the tooth had become sensitive to hot and cold, and it appeared significantly shorter than before the accident.
History of Present Illness:The patient reports ongoing mild sensitivity to cold and occasional discomfort upon biting, especially when chewing hard foods. The tooth appears aesthetically unpleasing due to its short length and lack of structural integrity.
Clinical Examination:
Good oral hygiene.
No signs of active caries or periodontal disease. Gingival tissues were healthy, with no inflammation or recession.A large fracture involving about 1/3 of the crown was observed, extending into the pulp.The tooth was slightly shorter than its contralateral counterpart, and the fracture was near the gingival margin.
Radiographic Examination:
The root structure appeared intact, and no periapical radiolucency or signs of infection were noted.The tooth had a relatively short remaining crown height, making it unsuitable for direct restoration without additional support.
Diagnosis:Fractured Central Incisor with fracture near the gingival margin.
Treatment Plan:
Root Canal Treatment : Root canal therapy had been performed on tooth after the fracture. The pulp was found to be necrotic, likely due to trauma, and was successfully treated with conventional root canal therapy.
The patient was asymptomatic after the procedure, and no signs of infection were present.
Post and Core Restoration: Given the insufficient remaining tooth structure and reduced height of the tooth, a post and core restoration was planned.A customized metal or fiber post would be placed into the root canal space to provide support for the crown.
The core build-up material would be used to restore the shape and height of the tooth to allow proper fitting of the final restoration.
Crown Fabrication:A zirconia crown was chosen for its strength, durability, and aesthetic qualities.The tooth would be shaped to fit the zirconia crown after post and core placement.
An intraoral digital scan would be taken to create an accurate 3D model of the prepared tooth for the crown fabrication.The final crown would be cemented after adjustments to ensure proper occlusion and aesthetics.
Follow-up:
Post-cementation check-up in 1-2 weeks to assess the fit and comfort of the restoration, followed by regular maintenance visits every 6 months.
This case highlights a multi-step process for restoring a fractured anterior tooth that has undergone root canal treatment. The primary concern with such fractures is the loss of tooth structure, especially when the crown height is insufficient to support a traditional direct restoration.
Post and Core Restoration:
The post and core is critical in providing structural support to the tooth, particularly when there is not enough remaining tooth structure to retain a crown. A fiber post was selected in this case due to its excellent bonding characteristics and more conservative approach compared to traditional metal posts.The core build-up material used (composite resin) was designed to restore the tooth’s original contour and height, preparing it for the final crown. The accuracy of the core build-up is essential for the long-term success of the restoration.
Zirconia Crown:
Zirconia was chosen for its combination of aesthetic appeal and mechanical strength, making it ideal for anterior teeth subject to functional stresses.
Conclusion:
This case demonstrates the importance of a comprehensive treatment plan in managing fractured anterior teeth. Root canal therapy, post and core restoration, and the use of zirconia crowns together offer an effective solution to restore both function and aesthetics for a patient with substantial tooth loss due to trauma. The digital workflow ensured precise fabrication and minimal intervention, improving both the patient experience and the long-term success of the restoration.
Question: Why is it important to perform a post and core restoration in a tooth with insufficient crown height, such as in this case?
Answer: A post and core restoration is crucial in situations where the remaining tooth structure is insufficient to support a crown, as in this case. The post provides internal support within the root canal, while the core builds up the necessary height and shape for the crown to be seated securely. Without a post and core, the crown would lack the retention needed to stay in place, and the tooth would be more vulnerable to further fractures or failure of the restoration.
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