The aim of this study is to evaluate the correlation between two point distance measurements performed by surgeon on patients face with foldable ruler, which is the most commonly used method, and the subjective scoring will be done by the patient with the help of the edema scale, for measuring edema.

The patients will be selected among the patients who apply for mandibular impacted third molar extraction to Necmettin Erbakan University, Faculty of Dentistry. A total of 60 patients will be included. All third molar operations will be carried out by the same surgeon in all groups with the same technique.Two methods will be used to evaluate the edema on the face.

1. Method The surgeon will measure from three different places on the patient's face ( two point distance) with the help of a paper ruler.

   • Tragus-Pogonion
   • Tragus-Labial Komissura
   • Angulus Mandibula-Lateral Kantus Measurements will be made preoperative, postoperative 2. and 7. days and saved as milimetre.

2. Method Patients will be given edema scale.With the help of the edema scale, the patients will be evaluated the edema by themselves. When the patient stand in front of the mirror, they will be assessed the edema on their face. And a value between 0 and 4 will be pointed on the scale postoperative 2. and 7. days.

A correlation between the results of the first and second methods will be examined.

Inclusion Criteria:

• Impacted mandibular third molar teeth (mesioangular, mucosa and bone retantion)
• Patients with any chronic disease and allergy

Exclusion Criteria:

• Smoking
• Pregnancy or lactation
• pericoronitis