impacted third molar
Conditions
Interventions
Observation group :None
Sponsors
Xuzhou Stomatological Hospital
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Two radiographic examinations are available: the first examination (T1) shows the third molar tooth germ, and the time interval between the second examination (T2) and the first is at least 1 year. 2. Healthy patients without systemic diseases. 3. No history of mandibular third molar extraction.
Exclusion criteria
Exclusion criteria: 1. Incomplete patient clinical records or poor image quality. 2. Dental caries, periapical lesions, or any other abnormalities of the mandibular third molars. 3. Congenital diseases. 4. Any history of mandibular trauma.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Developmental stages and depth of the third molar;Crown width of the third molar;Third molar inclination angle;Mandibular angle;Retromolar space length;Mandibular alveolar length; | — |
Secondary
| Measure | Time frame |
|---|---|
| Ratio of retromolar space length to mandibular alveolar length;Ratio of third molar crown width to retromolar space length; | — |
Countries
China
Contacts
Public ContactLi Jiqing
Xuzhou Stomatological Hospital
Outcome results
None listed