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  • Title: [Clinical evaluation of extensively damaged pulpless anterior teeth restored with direct and indirect cast dowel-core crowns].
    Author: Li C, Feng YZ.
    Journal: Zhong Nan Da Xue Xue Bao Yi Xue Ban; 2004 Aug; 29(4):475-7. PubMed ID: 16134611.
    Abstract:
    OBJECTIVE: To compare the clinical effects of the restoration of residual crowns and roots with direct and indirect cast dowel-core crowns. METHODS: The direct and indirect techniques were applied to fabricate cast dowel-core in 119 teeth of 91 patients. The direct dowel-cores were made by fabricating wax patterns in the prepared teeth in the patients' mouth; and the indirect dowel-cores were fabricated with wax patterns on casts poured by injecting agar impression material into the canal. Then the completed wax patterns were invested. After finishing the dowel-cores, they were cemented in the teeth. The metalceramic crowns were made to restore these teeth. RESULTS: Of the 119 teeth, 71 succeeded and 5 failed in 76 dowel-cores made by the direct method; and only 1 tooth failed among the 43 dowel-cores made by the indirect method. CONCLUSION: The indirect method using agar impression material can be manipulated easily and conveniently with accurate impressions. The dowel-core fits the root canal and the margin has good adaption. The retention is good and this method is practicable.
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