Search results for "Bone quality"

showing 3 items of 13 documents

Diagnosis and Planning in Immediate Loading: Implant Selection

2019

Despite the increasing patients’ desire for immediate prosthetic loading of implants, several factors must be taken into account before pursuing the immediate loading (IL) protocol. In general, the number, size, characterization, and distribution of implants should be based on the implant-prosthodontic plan, arch form, and available bone quality and quantity, regardless of the loading protocol. However, implant selection in IL represents one of the most important clinical challenges due to the primary stability requirement.

business.industryImmediate loadingBone qualityDentistryMedicineImplantbusinessRadiation treatment planningSelection (genetic algorithm)
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Poor Bone Quality in Patients With Amyotrophic Lateral Sclerosis

2020

Objective: Musculoskeletal functional deterioration in Amyotrophic lateral sclerosis (ALS) is associated with an increase in bone fractures. The purpose of this study was to evaluate the influence of sex, ALS type, on bone quality in patients with ALS compared to healthy controls. The impact on bone health of the clinical status and some metabolic parameters was also analyzed in ALS patients.Methods: A series of 33 voluntary patients with ALS, and 66 healthy individuals matched in sex and age underwent assessment of bone mass quality using quantitative ultrasound (QUS) of the calcaneus. Ultrasonic broadband attenuation (BUA), the speed of sound (SOS), stiffness index and T-score were measur…

medicine.medical_specialtyamyotrophic lateral sclerosisOsteoporosisvitamin DPhysical strengthGastroenterologylcsh:RC346-429Pulmonary function testingFEV1/FVC ratioInternal medicinemedicineVitamin D and neurologyAmyotrophic lateral sclerosisamyotrophic lateral sclerosis bone quality neurodegeneration osteoporosis quantitative ultrasound (QUS) measurement vitamin DOssos Malaltieslcsh:Neurology. Diseases of the nervous systemBone mineralquantitative ultrasound (QUS) measurementbusiness.industryneurodegenerationBrief Research Reportmedicine.diseaseosteoporosisbone qualityNeurologyCalcaneusNeurology (clinical)business
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Vergleich radiologischer Verfahren zur präoperativen Beurteilung der Verankerungsfestigkeit von Wirbelsäulenimplantaten

1997

PURPOSE To compare three techniques with regards to their ability to estimate pull out strength of spinal fusion hardware. MATERIAL AND METHODS VDS-screw fixation strength in 50 human cadaveric vertebral bodies was approximated by means of pull out force measurement. Bone quality was assessed by Dual X-ray Absorptiometry (DXA). Quantitative Computed Tomography (QCT) and T2*-relaxation time. For each of these techniques, correlation with axial pull out force strength was investigated. RESULTS Highest correlation was found for cancellous bone density measured by QCT (r = 0.72; p < 0.001). Immediately followed by DXA (r = 0.70; p < 0.001), which involves all bone components. Inverted T2*-relax…

musculoskeletal diseasesMaterials sciencemedicine.diagnostic_testbusiness.industrymedicine.medical_treatmentmedicine.anatomical_structureNuclear magnetic resonanceSpinal fusionBone qualitymedicineRadiology Nuclear Medicine and imagingCortical boneDual x-ray absorptiometryQuantitative computed tomographyCadaveric spasmNuclear medicinebusinessCancellous boneFixation (histology)RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren
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