Topic 32 of 53 in the MU Plovdiv syllabus for Conservative Dentistry – Part I (Dental Medicine, Year 3). The free AceMed note covers it in 16 sections, about 2,559 words (21 min of reading), with 51 flashcards.
In this note
Introduction
Endodontium – definition
Pulp cavity and pulp chamber
Root canals and their ramifications
Apical anatomy
Clinical relevance
Key points
Vertucci classification of canal configurations
Tooth-by-tooth summary
Incisors and canines
Premolars
Clinical pitfalls
Pulp chamber floor and the laws of orifice location
Maxillary molars
Mandibular molars
Third molars, summary and pitfalls
Introduction
The endodontium is the pulp with the dentin around it. The space the pulp fills, the pulp cavity, is a branching system rather than a single tube; its anatomy decides where the pulp is reached, where instruments must stop and which areas only the irrigant can clean.
Endodontium – definition
The endodontium (pulp–dentin complex) is the dental pulp and the surrounding dentin, regarded as one unit. Both arise from the dental papilla and the odontoblast processes run in the dentinal tubules, so every stimulus to dentin also reaches the pulp (pulp histology: topic 50).
The endodontium communicates with the periodontium (gingiva, periodontal ligament, cementum, alveolar bone) through:
the apical foramen – vessels, nerves and the main route of infection;
lateral, accessory and furcation canals;
dentinal tubules exposed where cementum is missing;
A necrotic pulp can therefore cause a lesion beside the root or in the furcation that mimics periodontal disease, and a deep pocket can reach the pulp (endo-perio lesions).
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