INTRODUCTION
It's well known that pulpal infections result in pulp necrosis and if left untreated will most likely lead to periapical pathologies due to irritant leakage ( be it microbial, defective restoration material etc.), trauma, improper endodontic treatments, or diseases of non-endodontic origin. In this assignment, systemic diagnosis of several periapical lesions will be discussed along with their treatment plan and prognosis.
CLASSIFICATION OF PERIAPICAL PATHOLOGIES
Several classifications have been established, 3 of which are most commonly referred to: Grossman's classification, WHO classification, and Ingle's classification of pulpoperiapical pathosis.
Grossman's classification:
1. Acute periradicular disease
2. Chronic periradicular
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Not tender upon percussion
c. No mobility
d. No response to thermal/electric pulp test
e. Lesions are discovered on routine x-rays as a well or poorly defined radiolucent lesion with possible root resorption
Treatment and Prognosis:
a. In restorable tooth, RCT is performed
b. In non-restorable tooth, extraction and curettage are preferred.
V. RADICULAR CYST
Etiology:
a. Caries
b. Irritants from restorative material
c. Trauma
d. Pulpal death from developmental defects
Signs and Symptoms:
a. Usually asymptomatic and discovered in routine x-ray
b. Slowly growing and reach a large size
c. Involved teeth are usually non-vital with discoloration, fracture or failed RCT.
d. The cyst appears round, pear or ovoid shaped radiolucency on x-ray with a thin radio-opaque margin.
Treatment:
a. Endodontic treatment
b. Apicectomy
c. Extraction in case of severe bone loss
d. Enucleation with 1ry closure
e. Marsupilization with larger ones
VI. CHRONIC ALVEOLAR ABSCESS
Etiology:
a. Pulpal necrosis
b. Associated with chronic periapical periodontitis and abscess
Signs and Symptoms:
a. A sinus tract is usually common opening into the oral cavity
b. Generally asymptomatic
Diagnosis:
a. History of sharp pain that subsided and hasn't
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Sinus tract resolves after RCT
VII. EXTERNAL ROOT RESORPTION
3 types are common: apical, lateral and cervical root resorption.
Etiology:
a. Infected necrotic pulp tissue
b. Over-instrumentation during RCT
c. Adjacent impacted tooth
d. Trauma
e. Granuloma/cyst
Signs and Symptoms:
a. Asymptomatic
b. Mobile root after complete resorption
c. Pink tooth is observed if the resorption reaches the crown
Diagnosis:
a. Pink discoloration
b. Radiographic findings show loss of lamina dura
c. Irregular shortening of root
d. Radiolucency at the root and adjacent bone
Treatment and Prognosis:
a. Remove stimulus causing the inflammation
b. Surgical/non-surgical RCT should be performed according to the case
c. Resorption usually stops after treatment, internal bleaching may be performed for esthetic reasons.
VIII. DISEASES OF PERIRADICULAR TISSUE OF NON-EDONTOGENIC ORIGIN
Benign Lesions:
a. Ossifying fibroma
b. Myxoma
c. Ameloblastoma
d. Solitary bone cyst
e. Lateral periodontal cyst
f. Central hemangioma
g. Central giant cell granuloma
Diagnosis:
a. Teeth are vital
b. Surgical biopsy is necessary for final diagnosis
Malignant Lesions:
a. Squamous cell carcinoma
b. Multiple myeloma
c. Chondrosarcoma
d. Osteogenic sarcoma