Comparison of bone resorption at one-step and two-step mandibular endosseous implants in dogs

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Abstract
Endosseous dental implants were inserted into dog jaw bone following 2 different implantation principles. Using the 2-step procedure, the implant is left submerged, covered by the mucoperiosteum for a healing period, before communication with the oral cavity is established. According to the 1-step procedure, this communication is established peroperatively. In order to estimate radiographically the degree of bone resorption following the 2-step as compared to the 1-step procedure, the former was used on the right and the latter on the left side of the mandible in 2 dogs. Periodic identical intraoral radiographs revealed bone resorption in the neck area of all implants. After a 1-yr period with bilateral bridges, the vertical resorption varied between 3-5 mm. No difference was found between the 2 methods concerning this bone resorption. The observation seems to be contrary to the general opinion on the matter and pertinent investigations with the present model will be performed in human material.