DENT3060 Lecture Notes - Lecture 8: Maxillary Sinus, Orthognathic Surgery, Human Tooth Development
Document Summary
Lighten skull, sound resonance, trauma buffer (brain), humidify air, immune defence assistance. Pneumatic cavities surround nasal cavity (close to orbital walls, dura mater of acf) Roots in relation to sinus: 2nd molar closest proximity (mb root avg. 1. 97mm from sinus floor: 1st molar, 3rd molar, 2nd premolar, 1st premolar, canine. Maxillary first to develop: 5th month: grows into adj maxilla, 12-14yrs: final growth (corresponds with permanent tooth eruption & alveolus growth, 15-20ml volume when growth completed. Acute sinusitis: s. pneumoniae, h. influenza fungal balls esp. immunocompromised patients. Source control (endodontic, extraction) or management (antibiotics, douche, decongestants) Oro-antral communication: space created between maxillary sinus & oral cavity. Oro-antral fistula: permanent epithelialised tract between oral cavity & maxillary sinus. M/c/s of purulent discharge if present (ideally before abx) No nose blowing/sinus precautions (sneeze with open mouth, avoid straws, avoid smoking) Small oac (<2mm) may heal spontaneously if patient"s sinuses healthy. Small (2-3mm): collagen plug & figure-8 suture + conservative measures.
