As the result of postoperative complication of 176 persons (male: 97, female: 79) hospitalized for extraction of lower third molar from November 1986 to June 1987 at the department of dentistry, infirmary of school of medicine, Hanyang University, the author came to following conclusions.
1. The age distribution occupied to 114 persons (64.8%) between 21 to 30 years old and 37 persons (21.0%) between 31 to 40 years old.
2. The chief complaints for extraction revealed 52 persons (29.5%)with pericoroniti 43 persons (26.1%) with dental caries, 35 persons (19.9%) with pain.
3. According to classification of eruption status, 42 cases (23.9%) were normal erup-tions, 119 cases (67.6%) were partial impactions, 15 cases (8.5%) were complete impactions.
4. The burs were mainly used for separation of tooth and bone reduction with envelope type incision of flap design.
5. The pain of postoperation showed 115 cases (65.3%}with minimum degree, 30 cases (17.0%) with moderate and 6 cases (3.4%) with severe degree
6. The bleeding of postextraction appeared 144 cases (81.7%) with minimum and 27 cases (15.4%) with moderate degree mainly.
7. The postoperative swelling revealed 151 cases (85.8%) with minimum degree, 20 cases (11.4%) with moderate and only 5 cases (2.8%) with severe degree.
8. There was 1.7% (3 among 176 cases) incidence of dry socket after extraction.
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