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[Topographic evaluation of the impacted mandibular third molar. Radiographic study].
J Fanourakis1, S Kamberos, M Kolokoudias
1Faculty of Dentistry, University of Athens, Greece.
To Helleniko Periodiko Gia Stomatike & Gnathoprosopike Cheirourgike
|September 1, 1990
Summary
Preoperative planning for wisdom tooth extraction requires accurate radiographic evaluation. Most impacted mandibular third molars are positioned closer to the ramus than their crown width suggests, often angled mesially.
Area of Science:
- Dentistry
- Oral Surgery
- Radiology
Background:
- Preoperative planning is crucial for successful wisdom tooth extraction.
- Radiographic examination aids in assessing tooth position and anatomical relationships.
Purpose of the Study:
- To analyze the spatial relationship between impacted mandibular third molars, the second molar, and the anterior border of the ramus.
- To determine the common angulation and impaction patterns of mandibular third molars.
Main Methods:
- Retrospective analysis of 961 radiographs.
- Evaluation of 1136 impacted and partially impacted mandibular third molars.
- Measurement of the distance between the anterior ramus border and the second molar relative to the third molar crown diameter.
Main Results:
- In 66.55% of cases, the distance between the anterior ramus border and the second molar was smaller than the wisdom tooth's crown diameter (P < 0.0001).
- Mesioangular impaction was the most frequent orientation (42.34%, P < 0.0001).
- Vertical (21.13%), horizontal (20.60%), and linguoangular (2.73%) impactions were also observed.
Conclusions:
- Impacted mandibular third molars frequently present with limited space between the ramus and the second molar.
- Mesioangular positioning is the predominant impaction type, necessitating careful preoperative assessment.
- Radiographic analysis is essential for predicting surgical difficulty and planning wisdom tooth extraction.