1. 1. Engquist B, Bergendal T, Kallus T, et al. A retrospective multicentre evaluation of osseointegrated implants supporting overdenture. Int J Oral Maxillofac Implants 1988;3:129-34.
2. 2. Lindquist LW, Carlsson GE, Jemt T. A prospective 15-year follow-up study of mandibular fixed prostheses supported by osseointegrated implants. Clinical results and marginal bone loss. Clinical Oral Impl Res 1996;7:329-36.
3. 3. Jemt T, Chai J, Harnet J, et al. A 5-Year prospective multicenter follow-up report on overdenture supported by osseointegrated implants. Int J Oral Maxillofac Implants 1996;11:291-98.
4. 4. Neart I, De Clercq M, Theuniers G, et al. Overdentures supported by osseointegrated fixtures for the edentulous mandible: A 2.5- year report. Int J Oral Maxillofac Implants 1998;3:191-96.
5. 5. Albrektsson T. A multicenter report on osseointegrated oral implants. J Prosthet Dent 1988;60:75-84.