PURPOSE: To know the functional and radiologic results of the operative treatment for the type I and II tibial plateau fractures according to the methods of internal fixations. MATERIALS AND METHODS: Twenty-six patients, who had been treated with open reduction and internal fixation for the type 1 or 2 tibial plateau fractures were evaluated. Twelve cases of type 1 fractures were fixated with 1 lag screw in 5, 2 lag screws in 4 and buttress plate in 3. Fourteen cases of type 2 fractures were fixated with 1 lag screw in 4, 2 lag screws in 6 and buttress plate in 4. The criteria of Hohl and Porter was used for the evaluation of the clinical and radiological results. RESULTS: There was no significant difference in the clinical result in type 1 and 2 tibial plateau fractures according to the methods of fixations. And the radiological results were not significantly different in both of type 1 and 2 fractures. CONCLUSION: If the anatomical reduction of the articular surface can be achieved, the methods of fixation for the type 1 and 2 tibial plateau fractures do not affect the final clinical and radiological results.