Schulte, J., Flores, A., and Weed, M., Crown-to-Implant Ratios of Single Tooth Implant-Supported Restorations, Journal of Prosthetic Dentistry, Vol. 98, Issue 1, p. 1-5, July 2007.

• 结论:这一研究的结果表明，对于天然牙须遵循的冠根比概念，对于潜在的种植位点或已有的种植修复而言，未必适用。那些成功的种植体的牙冠-种植体