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The maxillary sinus is one of the paired paranasal sinuses located in the bones of the skull. These sinuses are air-filled spaces within the bones around the nose, and they play several important roles in the respiratory system. The maxillary sinus is the largest of the paranasal sinuses and is located within the maxillary bones, which form the upper jaw. Key Features of the Maxillary Sinus: 1. Location: The maxillary sinuses are located in each maxillary bone, above and behind the cheeks. They are situated close to the nasal cavity. 2. Air-filled Cavities: Like other paranasal sinuses, the maxillary sinus is an air-filled cavity lined with mucous membranes. These membranes produce mucus, which helps moisturize and protect the nasal passages. 3. Drainage: The maxillary sinus has a small opening known as the maxillary sinus ostium. This opening connects the sinus to the middle meatus, a space within the nasal cavity. The ostium allows for the drainage of mucus from the sinus into the

**Anatomy of Root Canal Classification** The root canal is an essential part of the tooth, housing the pulp tissue that contains nerves, blood vessels, and connective tissues. Understanding the anatomy of the root canal is crucial for dental practitioners as it helps in diagnosing and treating various dental conditions. Let's explore the classification and anatomy of the root canal in this short lecture: **Root Canal Classification:** The classification of root canals is based on the number of roots and canals present in a tooth. The most common root canal classification system is the Vertucci classification, which categorizes teeth into eight types (Type I to Type VIII) based on their root canal configurations. Each type represents a specific arrangement of canals within the root. **Anatomy of Root Canal:** The root canal system is composed of the pulp chamber, root canals, and apical foramen. 1. **Pulp Chamber:** The pulp chamber is the central hollow space within the

  MCQ Test on Acute and Chronic Inflammation MCQ Test on Acute and Chronic Inflammation Time left: Show Correct Answers Please enable JavaScript to view the comments powered by Disqus. Subscribe * indicates required Email Address * Phone Number /* real people should not fill this in and expect good things - do not remove this or risk form bot signups */ See Reference books