Maxillary sinus pneumatization following extractions: a radiographic study

Area of Science:

• Dentistry
• Oral and Maxillofacial Surgery
• Radiology

Background:

• Maxillary sinus pneumatization is the expansion of the sinus cavity into the alveolar process after tooth loss.
• Understanding this phenomenon is crucial for dental implantology and reconstructive surgery.

Purpose of the Study:

• To quantify postextraction maxillary sinus pneumatization.
• To identify factors influencing the degree of sinus expansion using panoramic radiography.

Main Methods:

• Panoramic radiographs of 152 subjects were analyzed.
• Measurements used fixed reference lines (interorbital and zygomatic process lines).
• Superoinferior sinus floor position was compared between dentate and edentulous sites, and pre- and postextraction.

Main Results:

• Inferior expansion of the maxillary sinus was observed postextraction (average 1.83-2.18 mm).
• Greater expansion occurred with superiorly curving sinus floors (5.27 mm), second molar extractions, and multiple adjacent tooth extractions.

Conclusions:

• Maxillary posterior tooth extraction leads to inferior sinus expansion (pneumatization).
• Factors like sinus floor curvature and number/type of extracted teeth influence expansion.
• Consider immediate implantation or bone grafting to preserve bone architecture in high-risk cases.