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Case 185240

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Disease / syndrome / tumor / condition

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Full mouth

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Canaray 185240

No impingement of left coronoid process upon left zygomatic arch

The left coronoid process does not impinge upon the posterior surface of the zygomatic process of the maxilla or the zygomatic bone. In the mandibular open position, the coronoid process is positioned below the level of the zygomatic arch. The condylar head translates to the crest of the articular eminence.

Volume rendering of left maxillofacial region

In this volume rendering of the left maxillofacial region, the position of the left coronoid process relative to the zygomatic arch is demonstrated. The coronoid process is positioned below the level of the zygomatic arch in the mandibular open position.

Right coronoid process not in contact with the right zygomatic arch

The right coronoid process is not in contact with the bones of the right zygomatic arch. The right coronoid process is longer than the left coronoid process. However, a visible soft tissue gap exists between the coronoid process and any other bone in the mandibular open position.

1. Prominent right antegonial notch suggestive of limited range of masseter muscle

The right antegonial notch is very prominent, which may be suggestive of a reduced range of motion of the masseter muscle. The contralateral side does not exhibit a similar appearance. It is possible that the reduced range of motion of the masseter is the limiting factor for maximal jaw opening.

The longer right coronoid process compared to the left coronoid process is evident in these images. However, the coronoid process is at the level of the inferior border of the zygomatic arch, and is not in contact with any of the bones in the region.

Postsurgical appearance of the maxilla

A defect is present in the posterior lateral wall of the right maxillary sinus. Multiple dehiscences are present within the sinus walls bilaterally. Mild mucositis is present within the right maxillary sinus. The overall radiographic appearance is suggestive of a normal postsurgical appearance of the maxilla.

2. History of external resorption or iatrogenic damage to tooth 47

The fixation screws in the posterior right mandible appear to impinge upon the distal root apex of tooth 47. A defect is present at the distal surface of the distal root of tooth 47 at the midroot level, which is suggestive of a history of external root resorption or iatrogenic damage to this root. No significant periapical pathology is present at tooth 47, which suggests that the tooth remains vital.

3. Fixation screw in close proximity to the root apex of tooth 45

A fixation screw is in close proximity to the root apex of tooth 45. However, no periapical pathology is present at tooth 45, which suggests that the tooth remains vital.

4. External resorption at tooth 48Bu

Localized external resorption is present at the buccal surface of tooth 48 at the level of the cementoenamel junction. The tooth appears normal otherwise, and does not exhibit any endodontic pathology.

Impacted microdont tooth 18

Tooth 18 is a microdont that is horizontally impacted and distoangularly oriented. This tooth has not had any effect on the surrounding structures, and is a non-significant incidental finding.

Impacted tooth 28

Tooth 28 is horizontally impacted and is oriented in distobuccoversion. The follicle surrounding the crown of the tooth appears normal. Tooth 28 has caused mild resorption of the palatal root of tooth 27. The crown of tooth 28 is slightly malformed. This impacted tooth is a non-significant incidental finding.

5. Non-union of posterior right mandibular body

The mandibular bone fragments mesial to site 47 exhibit non-union.