Biocompatibility of Dental Materials Practice Test

These questions are part of the practice quiz. Start practicing

• Resin-containing Ca(OH)2 uninfected pulp undergoes which healing?
• Usage tests on the effect of acids showed which pulpal response, and this resolves after 8 weeks?
• Which material is identified as a common implant material?
• What is the term for the ability to cause cancer?
• What test has good correlation with cytotoxicity of materials in usage tests in teeth?
• In dental implants in bone tests, which assessment involves radiographs to evaluate osseous integration or radiolucency around the implant?
• Gingiva in the oral cavity is found surrounding which area?
• Which tissue is a primary target in dentistry usage tests?
• What is the body's attempt to isolate the implant as it degrades or leaches components?
• What property of Ca(OH)2 suspensions contributes to extreme cytotoxicity?
• What forms the greatest bulk of the tooth?
• Tissue response in implantation tests is evaluated by which method?
• Which characteristic is highlighted for ceramic implants in terms of safety?
• What is a key characteristic of long-term implantation testing? It tends to be expensive.
• Bleaching agents studies show which effect?
• The oral cavity is lined with which tissue?
• Which tissue has greater buffering capacity against acids?
• Use of implants has increased dramatically in the past 10 yrs Due To
• Enamel composition by mass includes which of the following?
• Most acids never reach the pulp if there is _____ mm of dentin
• Which statement best reflects the toxicity profile of ceramic implants as presented?
• Bone extracellular matrix (ECM) composition is best described as which mix?
• In cast alloys, contact with gingival tissues is primarily due to which substance?
• Which component in bleaching agents can penetrate enamel in minutes?
• The mucosa forms the lining of the oral cavity. Which option correctly identifies this tissue?
• In micrometers, acids penetrate dentin to less than which depth?
• Which component provides elastic and viscoelastic properties to bone due to its high content?
• Which in vitro can divide forever?
• What is removed to increase bonding?
• In what respect are Animal Tests different from usage tests?
• In dental implants in bone tests, which radiographic finding is used to assess osseous integration or radiolucency?
• Do Epigenetic mutagens alter the DNA
• In dental pulp irritation tests, where is the material placed and for how long is it left in place?
• Usage Tests is different from other animal tests because
• Material components may use tubules as ______ to pulp?
• The biocompatibility trend of glass ionomer in terms of cytotoxicity over time is best described as:
• In usage tests, pulpal inflammatory response to composites is low to moderate after 72 hours, with ______ mm dentin.
• In cast alloy restorations, the pulp is affected by which factor?
• Which statement about the advantages of usage tests is most accurate?
• In relation to bisphenol A derivatives used in dental materials, which of the following describes the hormone-like effect discussed?
• HEMA is _____ times less cytotoxic than Bis-GMA.
• What tissue forms as a reparative response after several weeks of pulpal irritation by resin composites?
• The barrier to bacterial ingress around implants is primarily provided by:
• Which in tubules may be affected even if acids do not reach the pulp?
• Most pulp irritation tests have involved teeth that are which of the following?
• The organic component of bone that provides elasticity is primarily which substance?
• Usage test give the ultimate answer to whether a material is biocompatible.
• Adhesives allow which of the following around restorative materials?
• Noncollagenous proteins are part of dentin's organic matrix.
• Tubule density near DEJ is
• If connective tissue around implants is compromised, which condition is more likely to occur?
• What does the source suggest about resin components and odontoblast responses?
• Cytotoxicity from resin composites is primarily due to release of what material?
• Which parameter is most directly assessed in cytotoxicity tests for dental materials?
• Peroxides penetrate enamel and reach which structure in minutes?
• What penetrates into the layer of collagen that remains after acid etching?
• Are primary cells or cell lines more relevant when measuring cytotoxicity?
• Which statement about long-term implantation tests is true?
• Which statement about enamel is true?
• Which measure is most effective in reducing cytotoxic effects from resin composites on the dental pulp?
• With _____ _____ and _______ ____, the reaction of pulp to composite is minimimal.
• When bonding agents placed on dentin, cytotoxicity is
• Diffusion of resin components to the dental pulp occurs through which structures?
• Odontoblasts reside in which tooth tissue?
• Which type of pulp tissue is of particular concern because it may respond differently to liners and cements?
• In teeth sealed to eliminate microleakage, which material is used?
• Which of the following is not a cancer-related term?
• According to Mucosa and Gingival Usage Tests, the difficulty is associated with which factor?
• Enamel is much harder than dentin, but it is
• Tubule density near pulp is
• Which tests assess cell death caused by a material by measuring cell number or growth before and after exposure to that material?
• Dentin barrier ______ cytotoxicity.
• Which of the following are components of the periodontium?
• If the insult continues, inflammation spreads below the alveolar crest, causing which condition?
• Are In Vitro Tests expensive?
• Which type of cavity preparation is typically used in Class 5 pulp irritation tests?
• The smear layer is formed by the action of which on dentin?
• Which of the following is a commonly cited disadvantage of Animal Tests?
• Odontoblast cell bodies reside within the pulp.
• The components of bonding agents may penetrate up to _____ mm of dentin.
• Which factor most directly enhances protection of the dental pulp?
• Effects of acids on pulp depends on
• What can rapidly traverse the dentin in sufficient concentrations to be cytotoxic?
• Which substrate yields stronger bonding in dental restorations?
• Cavity preparation produces what due to the action of bur or hand instruments on the calcified dentin matrix?
• Which of the following is a type of In Vitro Test?
• Calcium hydroxide cavity liners are bactericidal and also help coagulate which pulpal exudate?
• The sealed teeth exhibited much more which of the following?
• In enamel, the orientation of rods causes a differential response to which process?
• In the context of dentin as a barrier to diffusion, which statement is true?
• Cell lines in vivo are good because they are 1. stability and consistency 2. development of standard assay methods 3. essential for data comparison between different labs
• What structure forms when resin infiltrates the demineralized dentin matrix and binds with collagen?
• Many bonding agents are ______ to cells in vitro.
• 0.5-1 mm dentin cavity should be ______ to reduce thermal conductivity and microleakage.
• Dentin is composed of approximately what percent inorganic material?
• In usage tests, pulp reaction is
• What are primary cells that have been transformed to grow more or less indefinitely called?
• Mucosa and Gingival Usage Tests responses can be which of the following?
• Which of the following statements correctly lists the components of the periodontium?
• The positive or negative displacement of serum fluid through exposed tubules (with enamel removal) affects odontoblasts and pulpal nerve ending called
• Pulp response in deep cavities when a liner is used is
• Which statement describes the outcome of resin infiltration into dentin during bonding?
• Dentinal tubules are filled with which of the following that reside inside the pulp?
• Casting alloys have _____ biocompatibility.
• Which term describes inflammation of the dental pulp due to restorative material irritation?
• Smear layer is a ________ composed of organic and inorganic particles occludes tubules
• What traverses the region between the dentinoenamel junction and the pulp?
• Which is the hardest tissue of the body?
• Plasticizers used to make Soft denture liners and denture adhesives flexible can be released; some are described as which?
• Which factor is related to diffusion in dentin?
• Amalgams in deep, unlined cavities cause
• Bisphenol A and its dimethacrylate derivatives have been controversial for causing which estrogen-like response?
• Which of the following best describes macropores in porous materials used for biocompatibility testing?
• Animal Tests are described as allowing complex interactions between which elements?
• Dentinal tubule diameter at the pulp is ____ um
• Which statement about implant materials is supported by the information?
• Cytotoxicity is caused by ______ released from the composite.
• Enamel composition by mass is approximately which of the following?
• Connective tissue around implants avoids which condition?
• Which surface condition around dental prosthetics is most associated with an inflammatory response due to plaque accumulation?
• Near DEJ, tubules are
• The in vivo caries-inhibiting effect of glass ionomer is associated with what in vitro effect?
• Which tissue around implants forms a tight seal that limits ingress of bacteria?
• Which statement best describes the role of resin tags in bonding?
• Amalgam carried into gingival crevice may cause inflammation due to which cause?
• The most common material used for dental implants is:
• New amalgams show
• Microorganisms or immune hypersensitivity reactions result in which of the following?
• Histological studies show that inflammatory infiltrate from glass ionomer is minimal or absent after 1 month
• Resin tags contribute to bonding by providing what mechanism?
• The alkaline pH of Ca(OH)2 suspensions is greater than what value?
• Which statement best summarizes cytotoxicity testing?
• In the pulp, dentin tubules are described as what?
• Dentin consists of approximately 70% inorganic, 20% organic, and 10% aqueous.
• Which statement best reflects the need for regulatory paperwork in Animal Tests?
• Epigenetic mutagens support tumor growth by which mechanism?
• Each odontoblast gives rise to a ____ ____ traversing the thickness of the dentin
• Smear layer is removed by
• What is the penetration depth of acids into dentin in micrometers?
• However, if the dentin in the cavity floor is thin (< 0.1 mm), there is evidence that HEMA is ______ in vivo.
• Sealing margins occur through which mechanism?
• Implantation Tests evaluate materials that will contact subcutaneous tissue or bone. Which option correctly identifies the scope?
• Does bone have excellent capacity for self-repair?
• What is the inflammatory disease around dental implants caused by bacteria attached to implants near the gingiva?
• Bonding agents create what?
• What is the in vivo cytotoxicity of HEMA when dentin thickness is very thin?
• Biocompatibility depends on which factor?
• Any reaction diminishes after 5 weeks with an increase in ______.
• Which statement is NOT a disadvantage of usage tests?
• Diffusion in dentin is related to which factor?
• Which of the following is not listed as a pulp response in irritation tests?
• Which factor dramatically reduces fluid convection in dentin?
• Effects of resin components on odontoblasts' ability to form reparative dentin need to be determined.
• The odontoblastic processes occupy the ____
• Compared with the tubule density near the DEJ, tubule density near the pulp is
• What test is done in a test tube, cell-culture dish, or otherwise outside a living organism?
• Dentin Permeability Type II primarily involves which process?
• Near pulp, tubules are
• The thickness of the dentin correlates directly with the
• Which In Vitro Test type assesses genetic material changes in a cell?
• Which metal alloy component is commonly associated with nickel allergy?
• What effect is observed in sealed teeth regarding pulpal irritation?
• Do most consider dentin and pulp to be a single tissue?
• Long term implantation tests can last for
• Understanding biocompatibility requires knowledge of
• Polyacid in ionomer is unable to diffuse through dentin due to its
• Which statement best describes the effect of a dentin barrier on cytotoxicity?
• Mutagenesis assays primarily assess changes to which cellular component?
• _______ formed in the shapes of the entrapped mannitol crystals
• Which statement describes immortalized cells?
• Bonding agents placed on dentin have what effect on cytotoxicity?
• Usage test advantages
• Which outcome is noted as greater in sealed teeth in relation to dentin formation?
• Biocompatibility is best described as which type of field?
• Zinc phosphate cement restorations showed what compared to those not sealed?
• A question about usage tests being a method to evaluate biocompatibility.
• In vitro, freshly set resin composites often cause what level of cytotoxicity to cells over 24-72 hours?
• Glass ionomers have two primary clinical roles; which are they?
• Ceramic crown being biocompatible means that the material is
• Resin-containing Ca(OH)2 has which level of cytotoxicity?
• What type of assays can determine biomaterial effects on cells' genetic material?
• Clinical trials is a special case of what test in humans.
• Which term describes the phenomenon when serum displacement through tubules stimulates odontoblasts and nerves?
• The epithelium regenerates within a _______, and remodels and appears normal in _____ ______.
• What is a hydrophilic resin used in bonding agents?
• Lack of functional force or stress shielding leads to loss of alveolar bone height and width.
• Enamel seal has what permeability to most oral molecules?
• Pulp response to amalgam in shallow cavities or in deep but lined cavities is
• The marginal sealing with galvanic corrosion products relates to which phenomenon?
• Plasticizers released from soft denture liners may pose safety concerns because they are often which of the following?
• Chronic periodontal disease arises from continued insult to the periodontium. Which option best fits this description?
• If humans are used, the usage test is a
• In Mucosa and Gingival Usage Tests, if there is pre-existing inflammation what should be done?
• The collagen fibers of the periodontal ligament are grouped into what arrangement?
• Dental implant being biocompatible means that the implant is
• Which material is associated with reducing microleakage in dental restorations?
• Primary cells often rapidly ______ their in vivo functionality
• Which region has tubules that are larger?
• Cytotoxicity is reduced after 24 hours and with a ______.
• Bonding to enamel or dentin is stronger.
• To understand biocompatibility, one must understand which system the material is placed into?
• What are the most effective liners for pulp capping?
• Glass ionomers are used as cement and restorative materials. Which option best describes this dual use?
• Calcium hydroxide cavity liners are available in which forms?
• Can bone repair itself without external intervention?
• What term describes leakage of bacteria, food debris, or saliva through the material-tooth interface?
• Freshly prepared glass ionomer is ______ cytotoxic, but this effect is _____ over time.
• Bonding to dentin is difficult primarily due to which factor?
• In cast alloys, which component contacts gingival and mucosal tissues?
• They may suppress cellular metabolism for up to how many weeks?
• In dental implants in bone tests, which parameter indicates implant stability?
• Genotoxic mutagens directly alter cell DNA through
• Usage tests should study teeth with which condition to evaluate reparative dentin formation?
• Acid etching _______ the openings of the tubules
• Which testing approach is often chosen when considering comprehensive evaluation but has ethical and regulatory considerations?
• Composite bonds to tooth via
• Resin Tags ________ Bonding Strength
• Micro leakage restoration-tooth bonding may not have sufficient strength to resist which of the following?
• Primary cells will grow for only a ______ time in culture but _____ many of the characteristics of cells in vivo.
• Is enamel acellular?
• Materials placed in cavities with subgingival extensions are used to study responses of which tissues?
• Compared to in vitro methods, which approach is more comprehensive and relevant?
• Bleaching agents used as a gel contain which peroxide components?
• Which characteristic is true for cell lines used in biocompatibility testing to support standardization?
• Which test is used to evaluate tissue response at the implantation site?
• Which statement about peroxide diffusion is supported by the text?
• Which statement about primary cells in culture is true?
• Composite bonds to tooth via
• Implantation Tests are used for restoratives that
• What percentage of bone ECM is organics?
• The major component of the dentin organic matrix is collagen.
• Which pair constitutes the primary mineral content of bone?
• How can resin components diffuse to the dental pulp?
• Which option is NOT a biocompatibility quality?
• Which statement about cells that can divide indefinitely used for standard assays is correct?
• The fluoride release, which is for _____ in vivo, causes ______ in vitro.
• Dentin organic component is predominantly which?
• _____ forms a barrier through which toxic materials must diffuse through to reach the pulp tissue?
• 37% phosphoric acid for ____ seconds
• Which agent is used to remove smear layer?
• What is a potential result when peroxides reach pulpal tissue through enamel?
• Cavity preparation may section tubules in which orientation?
• Peri-implantitis is best described as inflammation around dental implants.
• A ________ like fluid fills the dentinal tubules
• Calculus and faulty restorations, coupled with microorganisms, may lead to which condition?
• Which condition is avoided by healthy connective tissue around implants?
• The tissue around implants that forms the tight bacterial barrier is most accurately described as:
• Tubule density near the pulp is closest to which value per square millimeter?
• In dentistry, which is NOT a target of usage tests?
• Which animals are commonly used in Class 5 pulp irritation tests?
• Substances such as cell-culture polystyrene can be used as negative (noncytotoxic) control.
• Biocompatibility is a ____ field.
• What is the primary mechanism by which dental implants achieve long-term stability in bone?
• Among dental implant materials, which is stated as the most common?
• What thickness of dentin is associated with reduced pulpal irritation from resin composites?
• Conditions that retain plaque, such as rough surfaces or open margins, increase which response around dental materials?
• After cavity preparation, the openings of tubules are opened by which process to enable resin infiltration?
• Which description best captures the range of Ca(OH)2 liner formulations?
• Usage can use what volunteers?
• Dentin Permeability Type I operates by which mechanism?
• Bone minerals consist of which elements?
• Which test determines whether a material causes inflammation to mucous membranes?
• Which option best describes the primary function of bonding agents in the dentin bonding process?
• Most ceramic implants have what toxicity profile?
• The periodontal ligament attaches the tooth root cementum to which structure?
• Which statement best describes the periodontal ligament's attachment?
• Casting alloys _____ allergy is common.
• The thicker the dentin, the _____ the protection.
• Enamel is what level of mineralization?
• Is enamel or dentin more an efficient buffer for acids?
• After short-term injuries, the connective tissue defect is filled with what in 3-4 days?
• Usage tests provide data on which tissue response to dental materials?
• Resin-containing Ca(OH)2 stimulates formation of which type of dentin?
• Which statement best defines biocompatibility?
• Which of the following is a reported outcome when resin-containing Ca(OH)2 is used on uninfected pulp?
• Composites in contact with fibroblasts are cytotoxic due to which factor?
• Components in resin can diffuse to pulp via
• Which tissue around implants provides the primary barrier to bacterial entry?
• Dentinal tubule diameter at the DEJ is ____ um
• Which combination best describes how composite bonds to tooth?
• Glass ionomer materials are used as which clinical roles?
• Which option is NOT a criterion for success in dental implants in bone tests?
• Gingiva is found surrounding which part of the teeth?
• Materials such as plasticized polyvinyl chloride can be used as which control?