Dentistry Biomaterials Biocompatibility Evaluation
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Questions and Answers

What are the four phases of the test program for evaluating the biocompatibility of biomaterials in dentistry?

General toxicity, local tissue irritation, pre-clinical, and clinical evaluation

Why is it important to understand the advantages and limitations of different types of screening assays for biocompatibility evaluation?

To select appropriate assays and interpret results accurately

What are some of the new scientific advances mentioned in the text that relate to dental materials and therapies?

Tissue engineering, stem cell therapy, genetic transfer, biomaterials, and growth factor therapies

What is the primary goal of conducting a structured biocompatibility assessment for new dental therapies?

<p>To evaluate the safety of these therapies</p> Signup and view all the answers

Why is it necessary to prove the safety of new technologies in dentistry before their clinical use?

<p>To ensure they are not hazardous to human health</p> Signup and view all the answers

What is the overarching objective of using screening assays in the biocompatibility evaluation of dental biomaterials?

<p>To protect patient health and safety</p> Signup and view all the answers

How many phases are involved in the structured biocompatibility assessment outlined for evaluating new dental therapies?

<p>Not provided</p> Signup and view all the answers

What is the minimum success rate required for a restorative material to be approved for commercial sale in the United States?

<p>90%</p> Signup and view all the answers

Which criteria are used to evaluate the success of restored teeth during clinical testing?

<p>United States Public Health Service (USPHS) criteria</p> Signup and view all the answers

What is a requirement for conducting clinical testing of restorative materials?

<p>Institutional review board approval and patient informed consent</p> Signup and view all the answers

How long must restorations be monitored during clinical testing according to the guidelines mentioned in the text?

<p>1 year</p> Signup and view all the answers

What is a limitation of the USPHS criteria mentioned in the text?

<p>Almost all studies have modified the criteria in some way</p> Signup and view all the answers

What is a requirement for the examiners evaluating restorations using the USPHS criteria?

<p>They must be trained to 80% reproducibility</p> Signup and view all the answers

What is the range of scores used to evaluate the parameters in the grading system?

<p>Alpha, Beta, Charlie, and Delta</p> Signup and view all the answers

What does the text suggest is the reason for the disparity between the estimated failure rate according to USPHS evaluations and the actual surveys of restoration failure and replacement?

<p>The roles of restoration technical quality, patient diet, oral hygiene, and dental treatment monitoring have not been thoroughly investigated</p> Signup and view all the answers

What does the text suggest about using the USPHS evaluation system as a continuum to judge longevity or failure of restorations?

<p>It may be an inappropriate strategy</p> Signup and view all the answers

What is the purpose of the grading system described in the text?

<p>To assess the clinical performance of dental restorations</p> Signup and view all the answers

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