This study compared handheld and mechanically assisted scanning to evaluate fascial edema after third molar extraction. The flexible ruler served as the reference. Linear measurements were taken from the tragus to the pogonion, from the tragus to the corner of the mouth, and from the lateral corner of the eye to the angle of the mandible.

This study compared Lidar-based scanning methods for evaluating fascial edema after third molar extraction. The three methods assessed were flexible ruler measurement, handheld scanning, and mechanically assisted scanning. Lidar-based scanning was performed using a mobile device and a dedicated application. Linear measurements were obtained from the tragus to the pogonion, from the tragus to the corner of the mouth, and from the lateral canthus to the angle of the mandible. The study objectives were to compare scanning methods, evaluate acquisition time and the number of repeated scans required for mobile scanning, and assess patient-related outcomes using a questionnaire.

Inclusion Criteria:

• Presence of at least one impacted mandibular third molar,
• Complete root development of the impacted tooth,
• Impaction classified as Pell and Gregory Level B and Winter Class II (vertical position)

Exclusion Criteria:

• Pregnancy or lactation;
• Neurological, endocrine, or psychiatric disorders associated with tremor or hereditary disorders affecting motor function,
• Facial asymmetry, facial deformity, or facial hair that could interfere with facial contour assessment;
• Current or planned use of medications that may influence postoperative facial edema, such as corticosteroids;
• Presence of chronic conditions that could mimic facial edema or a history of complications such as hematoma or subcutaneous emphysema.

20 healthy patients enrolled with bilateral or unilateral impacted mandibular third molars. Impaction classification was Pell and Gregory Level B and Winter Class II (vertical position).