Tuberosity

The tuberosity, specifically the maxillary tuberosity, is the rounded eminence of bone located at the most posterior portion of the upper jaw, distal to the last molar in each quadrant. This structure serves as an attachment point for the medial pterygoid muscle and the superior pharyngeal constrictor, and it forms part of the posterior boundary of the upper dental arch. In patients with a full complement of teeth, the tuberosity sits just behind the second or third molar. In edentulous patients, this prominence becomes an essential landmark for denture retention and stability.

In clinical practice, the tuberosity is most frequently relevant during extractions of upper posterior teeth, particularly third molars. One of the recognized complications of maxillary molar extraction is tuberosity fracture, where a portion of the bony prominence separates along with the tooth during the extraction process. This complication typically requires additional surgical management, including smoothing of sharp bony edges and careful wound closure. On the billing side, a tuberosity fracture during extraction justifies the use of a surgical extraction code rather than a simple extraction code, resulting in higher reimbursement that reflects the increased complexity and time involved.

The tuberosity also plays a significant role in prosthetic dentistry and implantology. For complete denture fabrication, the tuberosity area provides a posterior seal that contributes to denture retention. An excessively large or fibrous tuberosity may require reduction through alveoloplasty (CDT code D7310 or D7311) before prosthetic impressions can be taken. In implant planning, the tuberosity region is sometimes considered as a site for zygomatic or pterygoid implant placement when conventional implant sites in the posterior maxilla lack adequate bone volume. Each of these scenarios carries distinct procedural codes and documentation requirements that directly impact practice revenue.