This relies on screws threaded into the plate, minimizing the importance of bone quality for stabilization of the fixation system.
This study is the first to investigate simultaneously both the regional and the directional variations in mechanical properties and computed tomography (CT) numbers of the fresh mandible bone and to explore the correlation between the two sets of data with a view to provide a noninvasive method for determining the bone quality for designers of dental implants.
When considering accurate implant placement and the patient costs and operators' efforts in guide preparation, questions of whether patients have proper bone quality for CT-guided surgery, whether the surgery time is appropriate, and what kind of implants is planned to be used need to be confirmed prior to the surgery [3, 11].
All eligible patients gave their informed consent to participate and were allocated to one of 2 tibial component designs intraoperatively at Aarhus University Hospital, Denmark (after resection of the tibial plateau to ensure adequate bone quality for cementless arthroplasty).
BMLs are characterized as ill-defined regions of high-signal intensity within the subchondral bone on fluid-sensitive MR images that are associated with altered bone quality (for example, increased bone volume fraction [ 1- 3], increased periarticular bone mineral density (paBMD) [ 4], decreased mineral content [ 2], fibrosis [ 3], and edema [ 5]).
If necessary, a preoperative CT investigation may be helpful for assessing the bone quality of the proximal humerus with respect to the implantation of a stemless shoulder prosthesis.
A bone quality of the treated area may affect primary stability as described above, preoperative analysis of bone quality is important for clarifying the primary stability of dental implants.
Since low BMD captures approximately 50% of the bone strength, and, at the current time, bone quality (the contributing factor for the other 50% of bone strength) cannot be measured clinically, the T-score must be applied along with other validated risk factors for fracture risk that contribute to fracture risk independent of the BMD level.
The aim of this paper is to describe the biomechanical background which can be used as a basis for determining the bone quality by measuring the elastic properties of the bone and to design a novel device for the determination of the bone quality during dental implant surgery.
Poor bone quality also limited the ability for the patient to progress to functional lower extremity weight-bearing activities.
