Abstract
Purpose: The initial and long term bond failure rates of two orthodontic indirect bonding methods were compared. Materials and Methods: A review of 191 bondings provided a data base of bond failures for two indirect bonding methods. One method used a light cured adhesive system and clear vacuum formed transfer trays. A second method used a chemical cure adhesive system and putty transfer trays. The initial bond failure rates were compared using Fisher's Exact Test. The long term bond failure rates were compared using actuarial life tables and a Mantel-Haenzel comparison. Results: In initial bond failure the light cured method had a 9% failure rate compared to the chemical cured methods 0.7% failure rate. Long term the light cured method had a 0% failure rate while the chemical cured method had a 9% failure rate. Conclusion: The initial bond was less likely to fail with the chemically cured method but long term the light cured method was had fewer bond failures.
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