OBJECTIVE Besides others, there are two major problems in total hip replacement surgery which result in implant failure. First there is aseptic loosening due to a lack of implant biocompatibility or micromovements and second periimplant wear debris induced osteolysis which limits the survival rate of an implant. Regarding to recent data there are only limited therapeutic strategies to heal thes...

BACKGROUND The subcrestal placement of implant platform has been considered a key factor in the preservation of crestal bone, but the influence of implant placement depth on bone remodeling combined with peri-implantitis is not fully understood. The aim of this study was to assess the effect of the crestal or subcrestal placement of implants on peri-implant bone defects of ligature-induced peri...

Here is described a modified technique of palatomaxillary reconstruction that combines the use of a free vascularized bone graft by osteotomy, soft-tissue flap, zygomatic implant as an anchorage and two standard implants simultaneously. The patient presented with deformity in the left face after subtotal maxillectomy (Brown 2b classification). Preoperative work up was performed by a rapid proto...

A 47-year-old man underwent surgical resection and reconstruction with a fibula osteocutaneous flap. After the surgery, a surgical obturator was placed and adjusted. After flap healing, a conventional obturator was fabricated with polymethyl methacrylate resin and retained by the anatomical undercuts around the reconstructed fibula bone flap and the posterior part of the defect. As the defect s...

longevity of osseointegrated implants are intensely influenced by biomechanical factors. control of these factors prevents mechanical complications, which include fracture of screws, components, or materials veneering the framework. in this study, the impact of length and threads pitch of dental implants on the stress distribution and maximum von mises stress in implant-abutment complex and jaw...

An ideal implant needs to have the ability coordinate foreign body response and tissue regeneration. Here, Hydrogenated-silicon nanosheets (H-Si NSs) with favorable biodegradability are integrated functionalized into a β-tricalcium phosphate scaffold TCP) for bone defect healing. H-Si TCP can greatly improve regeneration through osteoimmunomodulation-guided biodegradation in vivo. The spatiotem...

The aim of this study was to examine the effects of immobilizing rhPDGF-BB plus rhBMP-2 on heparinized-Ti implants on in vivo osseointegration and vertical bone regeneration at alveolar ridges. Successful immobilizations of rhPDGF-BB and/or rhBMP-2 onto heparinized-Ti (Hepa/Ti) were confirmed by in vitro analysis, and both growth factors were found to be sustained release. To evaluate bone rege...