PURPOSE The aim of this study was to compare and analyze the peri-implant tissue conditions and prospective clinical outcomes associated with 2 types of hydroxyapatite (HA)-coated implants: (1) fully HA-coated implants and (2) partially HA-coated implants with resorbable blast medium on the coronal portion of the threads. METHODS Forty-four partially edentulous patients were randomly assigned...

The present post-trial follow-up investigated the influence of titanium implants with different surface treatments on clinical behavior soft and hard peri-implant tissues. Each 18 included patients received at least two adjacent implants: one control implant a dual acid-etched (DAE) in their apical portion machined coronal part, test DAE up to its portion. Peri-implant bone level change (BLC), ...

Over the last years, growing attention has been paid to the several domestic implant systems. This study presents results of a clinical trial of Implantium® implants followed up to 22 months. Two hundred fifty-two Implantium® implants were investigated which were placed in 119 patients between June 2003 and November 2004. The average follow-up period from implant placement was 10. 9months(SD 4....

BACKGROUND Dynamic interspinous stabilization devices generally provide satisfactory results, but can result in recurrent lumbar disc herniation, spinous process fracture, or bone resorption of the spinous process. The purpose of this study was to investigate if the Wallis dynamic stabilization device is associated with bone resorption. METHODS Patients who underwent single-segment posterior ...

The presence of fibrous tissue has long been known to decrease the long-term survival of a root-form implant. Excessive loads on an osseointegrated implant may result in mobility of the supporting device, and excessive loads may also fracture an implant component or body. Although several conditions may cause crestal bone loss, one of these may be prosthetic overload. Excessive loads on the bon...

BACKGROUND The biologic width around implants has been well documented in the literature. Once an implant is uncovered, vertical bone loss of 1.5 to 2 mm is evidenced apical to the newly established implant-abutment interface. The purpose of this study was to evaluate the lateral dimension of the bone loss at the implant-abutment interface and to determine if this lateral dimension has an effec...

The purpose of this study is to evaluate the dimensional changes that occur in the alveolar ridge after minimally traumatic tooth extraction by means of computed tomography (CT), with special focus on the portion of bone supporting the gingival zenith. Twenty subjects with indication for singlerooted tooth extraction and preserved alveolar walls were selected for this study. After a minimally t...

Purpose. The immunological mechanisms of peri-implant crestal bone loss have, hitherto, not been elucidated. We hypothesized that bacterial products from the microgap cause upregulation of cytokines in otherwise healthy peri-implant cells, which results in osteoclast formation and, ultimately, in bone resorption. Materials and Methods. We used RT-PCR and ELISA to assay mediators of osteoclastog...

PURPOSE Studies of maxillary overdentures supported by endosseous implants often show a high implant failure rate. The aim of the present investigation was to evaluate clinically and radiographically non-submerged implants supporting an overdenture in the maxilla. MATERIALS AND METHODS Forty-one patients were consecutively admitted for treatment. The standard procedure was to place 4 implants...