Clinical oral implants research
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Clin Oral Implants Res · Jun 2005
Comparative StudyThe evaluation of processed cancellous bovine bone as a bone graft substitute.
To determine the ability of a novel bovine cancellous bone xenoimplant to act as an osteoconductive graft in an ovine femoral defect model. An autograft harvested from the xenoimplant site was placed in a contralateral limb defect for comparison. ⋯ Processed bovine cancellous bone xenoimplants were osteoconductive in this model and show promise for development as a biomaterial in human and veterinary orthopaedic surgery.
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Clin Oral Implants Res · Jun 2004
Case ReportsVertical distraction osteogenesis of the mandible applied to an iliac crest graft: report of a case.
This clinical case represents a particular application of vertical distraction osteogenesis of the mandible. The surgical technique was applied to an iliac crest bone graft previously positioned on an anterior mandibular defect with the aim to restore the vertical height after a partial resorption in a trauma patient. ⋯ Vertical distraction osteogenesis appears to be a versatile surgical procedure, which can be applied as a secondary treatment in patients presenting with mandibular trauma sequelae.
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Clin Oral Implants Res · Feb 2001
Comparative StudyBiological and technical complications and failures with fixed partial dentures (FPD) on implants and teeth after four to five years of function.
The aim of this study was to compare the frequency of biological and technical complications with fixed partial dentures (FPDs) on implants, teeth and as mixed tooth-implant supported FPDs over 4 to 5 years of function. All implants belonged to the ITI Dental Implant System. Group I-I (implant FPD) included 33 patients with 40 FPDs, group T-T (tooth FPDs) 40 patients with 58 FPDs, group I-T (mixed tooth-implant FPDs) 15 with 18 FPD. ⋯ Loss of FPD over 4-5 years occurred at a similar rate with mixed, implant or tooth supported reconstructions. Significantly more porcelain fractures were found in FPDs on implants. Impaired general health status was not significantly associated with more biological failures but bruxism as well as extensions were associated with more technical failures.
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Clin Oral Implants Res · Feb 2001
Comparative StudyIn-vitro assessment of a registration protocol for image guided implant dentistry.
In this study a computer aided navigation technique for accurate positioning of oral implants was assessed. An optical tracking system with specially designed tools for monitoring the position of surgical instruments relative to the patient was used to register 5 partially or completely edentulous jaw models. Besides the accuracy of the tracking system, the precision of localizing a specific position on 3-dimensional preoperative imagery is governed by the registration algorithm which conveys the coordinate system of the preoperative computed tomography (CT) scan to the actual patient position. ⋯ The accuracy achieved compares well to the resolution of the CT scan used. Further development of point-to-point/point-to-surface registration methods and tracking hardware has the potential to improve the precision of the method even further. Our system has potential to reduce the intraoperative risk of causing damage to critical anatomic structures, to minimize the efforts in prosthetic modelling, and to simplify the task of transferring preoperative planning data precisely to the operating room in general.