3Andersen E,Saxegaard E,Knutsen BM,et al.A prospective clinicalstudy evaluating the caleb,and effectiveness of narrow-diameter threaded implants in the anterior region of the maxilla[J].Int J Oral Maxillofac Implants,2001,16(2):217-224.
5Andersen E, Saxegaard E, Knutsen BM, et al. A prospec- tive clinical study evaluating the safety and effectiveness of narrow-diameter threaded implants in the anterior re- gion of the maxilla[-J]. Int J Oral Maxillofac Implants, 2001,16(2) :217-224.
6Pjetursson BE,Tan K, Lang NP, et al.A systematic re- view of the survival and complication rates of fixed partial dentures (FPDs) after an observation period of at least 5 years[J].Clin Oral Implants Res,2004,15(6) : 667-676.
