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30396
Endodontics

Leakage due to improper obturation: Inadequate sealing of the root canal system allows bacteria and irritants to leak from the oral cavity back into the periapical tissues, causing the lesion to persist or enlarge.

Persistent cystic lining: A true cyst has a distinct epithelial lining that is not resolved by conventional non-surgical root canal therapy alone. If the cyst lining remains, the lesion may continue to grow.

Failure to do apical curettage: While not always necessary for non-surgical cases, in some instances where the lesion is large or persistent, surgical intervention including apical curettage (removal of the inflamed or infected periapical tissue) may be required to facilitate healing.

69191
Endodontics

Envelope flaps limit access to the operative site and often heal with scar formation due to inadequate blood supply at the incision line. Triangular and rectangular flaps provide better access and healing.

51405
Endodontics

Prophylaxis (cleaning the teeth) is typically performed before bleaching to remove surface stains and ensure even results.
Protective eyewear is essential for both the patient and the dental professional to protect the eyes from the bleaching agent and the light source (if used).
Polishing the teeth after treatment helps to smooth the tooth surface and enhance the final appearance.

41095
Endodontics

A permanent tooth with apical one-third root fracture would most likely remain vital and functional. Apical third fractures have favorable prognosis because: 1) Good blood supply is maintained to the coronal fragment through the periodontal ligament, 2) The fracture is away from the oral environment, reducing contamination risk, 3) Pulp often remains vital due to minimal disruption of apical blood supply, 4) Healing usually occurs with fibrous union between fragments, 5) Function is typically maintained. Root resorption and ankylosis are less common with apical third fractures compared to cervical fractures.

63953
Endodontics

 Identifying Root Curvatures

  • Perception by instrumentation refers to the tactile feedback that a dentist can obtain while using instruments during procedures, allowing them to identify curvatures in the root canal system.

35540
Endodontics

The most generally accepted treatment of horizontal root fracture in the apical third of a maxillary central incisor involves frequent pulp testing and radiographic examination (monitoring approach). This conservative approach is preferred because: 1) Apical third fractures have excellent prognosis for natural healing, 2) Pulp often remains vital and functional, 3) Splinting may not be necessary as the fracture is inherently stable, 4) Regular monitoring allows early intervention if complications arise, 5) Surgical intervention or extraction is rarely needed. The healing usually occurs with fibrous tissue union.

79643
Endodontics

Periapical surgery (also called apicoectomy or endodontic surgery) involves surgical intervention at the root apex and surrounding periapical tissues. Like any surgical procedure, it carries potential complications:

Paraesthesia → Injury or irritation of nearby nerves (e.g., inferior alveolar or mental nerve) can cause temporary or permanent altered sensation.

Ecchymoses → Bruising of soft tissues due to surgical trauma or bleeding in the operative area.

Stitch abscess → Localized infection at the suture site due to bacterial contamination or improper healing.

Since all of these can occur, the best choice is “All of the above.”

83312
Endodontics

Cervical third root fractures have the least favorable prognosis. This is because: 1) The fracture line is at or near the gingival margin, making restoration difficult, 2) Contamination from oral fluids is inevitable, preventing proper healing, 3) Crown-root ratio becomes unfavorable even if healing occurs, 4) Periodontal involvement is common, 5) Often requires extraction due to poor long-term prognosis. Apical third fractures have the best prognosis as they often heal with fibrous union and remain functional, while middle third fractures have intermediate prognosis.

99254
Endodontics

Thermal testing is the most common diagnostic test used to determine the status of pulp vitality in dentistry. It assesses the nerve response of the pulp to hot or cold stimuli.


 Radiography primarily provides information about the periapical bone and the presence of caries, not the direct vitality of the pulp. 
Percussion and palpation test the health of the periapical tissues and periodontal ligament, not the pulp itself.

22984
Endodontics

Explanation
Relief of pain: Always the first priority. Acute pain or infection must be managed before anything else.

Control of caries: Once the patient is comfortable, caries control prevents further destruction and stabilizes the dentition.

Endodontic procedures: Teeth requiring root canal therapy are treated after caries control, ensuring they can be preserved.

Periodontic procedures: Finally, periodontal therapy is carried out to establish long-term oral health and stability.

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