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48th BCS (Dental Part)

48th BCS (Dental Part)

বিগত সালের প্রশ্ন BCS 48th BCS (Dental Part)
প্রশ্ন 1 সঠিক উত্তর: D
In acute inflammation, pain occurs due to -
A. Histamine
B. Epinephrine
C. Leukotrines
D. Prostaglandins
Explanation:
Prostaglandins sensitize peripheral nociceptors to other mediators, amplifying the sensation of pain during acute inflammation. Copyright © JobScholar. All rights reserved.
প্রশ্ন 2 সঠিক উত্তর: B
Skeletal muscle is present in the following viscera -
A. Bronchi
B. The diaphragm
C. Blood vessels
D. Stomach
Explanation:
The diaphragm is a large skeletal (voluntary) muscle, unlike bronchi, blood vessels and stomach, which contain smooth muscle. Copyright © JobScholar. All rights reserved.
প্রশ্ন 3 সঠিক উত্তর: C
What is the critical post operative instruction for a patient with new restoration ration
A. Avoid eating for 24 hours
B. Use a soft bristled tooth brush
C. Avoid chewing on the restoration until anesthesia wears off
D. Rinse with a strong alcoholic mouth wash immediately
Explanation:
While local anaesthesia is still active, the patient cannot feel biting pressure properly and risks biting their cheek/tongue or damaging the fresh restoration, so chewing should be avoided until sensation returns. Copyright © JobScholar. All rights reserved.
প্রশ্ন 4 সঠিক উত্তর: B
Morphine is contra indicated in -
A. Acute MI
B. Biliary colic
C. Long bone fracture
D. Diagnosed acute abdomen
Explanation:
Morphine can cause spasm of the sphincter of Oddi, potentially worsening biliary colic, so it is generally avoided in this condition. Copyright © JobScholar. All rights reserved.
প্রশ্ন 5 সঠিক উত্তর: C
Bite mark analysis is most commonly associated with the following -
A. Occupational screening
B. Orthodontic purpose
C. Criminal investigations and assault cases
D. For proper treatment plan
Explanation:
Forensic odontology uses bite mark analysis mainly to help identify assailants or victims in criminal investigations and assault or abuse cases. Copyright © JobScholar. All rights reserved.
প্রশ্ন 6 সঠিক উত্তর: A
What does the principle of non maleficence mean in dental practice?
A. Do no harm
B. Always obey the patient
C. Making documents confidential
D. Avoid costly materials
Explanation:
Non-maleficence is the ethical principle obligating clinicians to avoid causing harm to the patient. Copyright © JobScholar. All rights reserved.
প্রশ্ন 7 সঠিক উত্তর: A
Which one is Maxillary antral pathology?
A. Nasal Polyp of antral lining
B. Osteogenic Sarcoma
C. Glioma
D. Blastoma
Explanation:
A polyp arising from the antral (maxillary sinus) mucosal lining is a recognized maxillary antral pathology, unlike the other listed tumours which arise elsewhere. Copyright © JobScholar. All rights reserved.
প্রশ্ন 8 সঠিক উত্তর: A
In TMJ ankylosis, there may be
A. Micrognathia
B. Anterior open bite
C. Retrognathia of maxilla
D. Easy lateral movement of jaw
Explanation:
Long-standing TMJ ankylosis, especially when it develops in childhood, restricts mandibular growth and leads to micrognathia (a small mandible). Copyright © JobScholar. All rights reserved.
প্রশ্ন 9 সঠিক উত্তর: D
Which of the following drug acts by inhibiting nucleic acid synthesis?
A. Clindamyuin
B. Doxycycline
C. Amoxicillin
D. Metronidazole
Explanation:
Metronidazole is reduced intracellularly to reactive products that damage bacterial DNA, effectively inhibiting nucleic acid function. Copyright © JobScholar. All rights reserved.
প্রশ্ন 10 সঠিক উত্তর: C
Regarding caries and pulpitis
A. Flouride gel may be applied for the prevention of acute pulpitis
B. Acute close pulpitis causes dull pain at night
C. Acidophilic theory is still the best hypothesis for caries formation
D. All caries can be treated with amalgum filling
Explanation:
The acidogenic (chemo-parasitic/acidophilic) theory, explaining caries as bacterial acid demineralization of enamel, remains the most widely accepted hypothesis of caries formation. Copyright © JobScholar. All rights reserved.
প্রশ্ন 11 সঠিক উত্তর: B
Severe facial cellulitis
A. causes small localized pus
B. is related to uncontrolled DM and root infection
C. essentially requires Tracheostomy
D. causes base of tongue pushed back blocking the airway
Explanation:
Severe odontogenic facial cellulitis commonly arises from spreading dental root infection and is more aggressive and difficult to control in patients with uncontrolled diabetes mellitus. Copyright © JobScholar. All rights reserved.
প্রশ্ন 12 সঠিক উত্তর: D
The best dimensional stability among elastomers is -
A. Polyether
B. Polysulfide
C. Condensation silicon
D. Addition silicon
Explanation:
Addition silicone (polyvinyl siloxane) has the least polymerization shrinkage and byproduct release among elastomeric impression materials, giving it the best dimensional stability. Copyright © JobScholar. All rights reserved.
প্রশ্ন 13 সঠিক উত্তর: B
Risk factor for wound infection is
A. Jaundice
B. Poor perfusion
C. Hypertension
D. Hyperlipidemia
Explanation:
Poor tissue perfusion reduces oxygen and immune cell delivery to the wound site, impairing healing and increasing infection risk. Copyright © JobScholar. All rights reserved.
প্রশ্ন 14 সঠিক উত্তর: C
Which concept of health emphasizes the ability to accomplish the social roles and responsibilities?
A. Biomedical
B. Holistic
C. Psychosocial
D. Ecological
Explanation:
The psychosocial concept of health focuses on a person's ability to function within their social roles and relationships, beyond mere absence of disease. Copyright © JobScholar. All rights reserved.
প্রশ্ন 15 সঠিক উত্তর: A
Which one is true for Hyperplastic gingivitis?
A. It is often associated with long term use of drugs like phenytoin
B. Scaling and antibiotic can easily cure the hyperplastic gum
C. Gingivectomy by electrocautery is always essential
D. Oral steroid is effective for this cause
Explanation:
Drug-induced gingival hyperplasia is a well-recognized side effect of long-term phenytoin (and certain other drugs like cyclosporine and calcium channel blockers). Copyright © JobScholar. All rights reserved.
প্রশ্ন 16 সঠিক উত্তর: C
Which of the following factor causes collapse of the lung?
A. Surfactant
B. Negative intraplural pressure
C. Elastic fibers of the lungs
D. Residual volume
Explanation:
The inherent elastic recoil of lung tissue tends to collapse the lung inward; this is normally opposed by negative intrapleural pressure, but if that seal is lost, the elastic fibres cause lung collapse. Copyright © JobScholar. All rights reserved.
প্রশ্ন 17 সঠিক উত্তর: D
What is the primary mechanism by which fluoride prevents dental caries?
A. By increasing enamel porosity
B. By enhancing bacterial growth
C. By removing plague completely
D. By promoting remineralization and inhibiting de mineralization
Explanation:
Fluoride's main cariostatic action is promoting remineralization of early carious lesions while inhibiting further enamel demineralization by acid. Copyright © JobScholar. All rights reserved.
প্রশ্ন 18 সঠিক উত্তর: C
Knoop, Rockwell, Vickers, Brinell tests are done to measure material's
A. Toughness
B. Tensile strength
C. Hardness
D. Thermal conductivity
Explanation:
These are all standard indentation-based tests used to measure the hardness of dental and engineering materials. Copyright © JobScholar. All rights reserved.
প্রশ্ন 19 সঠিক উত্তর: B
Which lesions show soap bubble appearance on radiograph?
A. Radicular cyst
B. Odontogenic Keratocyst
C. Osteosarcoma
D. Chronic osteomyelitis
Explanation:
A large multilocular odontogenic keratocyst can present radiographically with a characteristic multilocular 'soap bubble' pattern. Copyright © JobScholar. All rights reserved.
প্রশ্ন 20 সঠিক উত্তর: C
Implant Joint with bone is called
A. Biofusion
B. Osseo implantation
C. Osseo integration
D. Implant cementosis
Explanation:
The direct structural and functional connection between living bone and the surface of an implant is termed osseointegration. Copyright © JobScholar. All rights reserved.
প্রশ্ন 21 সঠিক উত্তর: B
Final finishing of glass ionomer restoration is done after
A. 7.5 minutes
B. 24 minute
C. 30 minutes
D. 1 hour
Explanation:
Conventional glass ionomer cement requires a maturation period (traditionally cited as about 24 hours, though this option lists the abbreviated figure) before final finishing to avoid disrupting the acid-base setting reaction. Copyright © JobScholar. All rights reserved.
প্রশ্ন 22 সঠিক উত্তর: B
Marsupialization of jaw cyst applies
A. In case of infected cyst
B. in a very large cyst with a chance of bone fracture
C. In case of unicystic ameloblastoma
D. When cyst is away from vital structure
Explanation:
Marsupialization is preferred for very large cysts where complete enucleation risks pathological jaw fracture or damage to adjacent vital structures, allowing gradual shrinkage of the cyst. Copyright © JobScholar. All rights reserved.
প্রশ্ন 23 সঠিক উত্তর: B
Which one is not oral specific ulcer or lesion?
A. TB ulcer in the palate
B. HPV warts in oral cavity
C. Chronic hyperkeratosis in betel chewer
D. Apthus ulcer cheek
Explanation:
HPV-related oral warts are viral proliferative lesions rather than a specific ulcerative condition, distinguishing them from the other listed ulcerative/keratotic lesions. Copyright © JobScholar. All rights reserved.
প্রশ্ন 24 সঠিক উত্তর: A
Which one is an allergic reaction in facial area only?
A. Angio nuratie oedema
B. Vasovagal shock with itchi skin
C. Anaplylaxis
D. Allergic stomatitis
Explanation:
Angioneurotic oedema classically presents as localized allergic swelling confined to the face/lips, unlike anaphylaxis which is a systemic reaction. Copyright © JobScholar. All rights reserved.
প্রশ্ন 25 সঠিক উত্তর: C
Which one is correct:
A. CBCT is good for soft tissue study
B. X-ray is good for mandibular tumor
C. CT Scan with contrast is good for oral cancer and Neck nodes studies
D. OPG can give a good image of tongue carcinoma
Explanation:
Contrast-enhanced CT provides excellent soft tissue and nodal detail, making it the modality of choice for staging oral cancer and evaluating cervical lymph nodes. Copyright © JobScholar. All rights reserved.
প্রশ্ন 26 সঠিক উত্তর: C
What informed consent is legally required in dentistry?
A. Only the dentist's signature
B. A written agreement with short explanation
C. Explanation of risk, benefits and alternative before treatment
D. Verbal approval after treatment
Explanation:
Legally valid informed consent requires the clinician to explain the risks, benefits and alternatives of treatment to the patient before proceeding. Copyright © JobScholar. All rights reserved.
প্রশ্ন 27 সঠিক উত্তর: D
Which one is true for Alveolar bone fracture?
A. Common in fernale fall from height
B. Miniplate fixation is essential
C. Teeth involved are extracted
D. splinting is quite useful
Explanation:
Alveolar bone fractures with teeth still attached are typically managed conservatively by repositioning and splinting to stabilize the segment while it heals. Copyright © JobScholar. All rights reserved.
প্রশ্ন 28 সঠিক উত্তর: B
Main reason for endodontic failure
A. Incorrect diagnosis with CBCT
B. Poor access cavity preparation
C. use of hand instruments
D. use of endomotor
Explanation:
An inadequate access cavity prevents proper visualization and instrumentation of the root canal system, leading to missed canals and persistent infection, a leading cause of endodontic failure. Copyright © JobScholar. All rights reserved.
প্রশ্ন 29 সঠিক উত্তর: C
The most critical aspect in designing an oral health education program for rural communities is -
A. Use of technical terminology
B. Number of dentists involved
C. Culture and literacy
D. Complexity of biostatistics
Explanation:
Effective health education must be tailored to the target community's cultural context and literacy level to ensure the message is understood and accepted. Copyright © JobScholar. All rights reserved.
প্রশ্ন 30 সঠিক উত্তর: A
What is the common cause of tooth sensitivity after restoration?
A. Use of high-speed handpiece with less irrigation
B. Overuse of fluoride
C. Occlusial adjustment
D. Adequate irrigation in etching
Explanation:
Cutting tooth structure with a high-speed handpiece without adequate water cooling/irrigation generates frictional heat that can injure the pulp, leading to post-restorative sensitivity. Copyright © JobScholar. All rights reserved.
প্রশ্ন 31 সঠিক উত্তর: C
Syncope relates to
A. Hyperglycemia
B. Prolong bleeding
C. Cerebral hypoxia
D. Pain and fear
Explanation:
Syncope is a transient loss of consciousness resulting from temporary global cerebral hypoperfusion and hypoxia. Copyright © JobScholar. All rights reserved.
প্রশ্ন 32 সঠিক উত্তর: D
Cell rich zone of pulp contains -
A. Ameloblast
B. Odontoblast
C. Odontoblast
D. Fibroblast
Explanation:
The cell-rich zone of the dental pulp, located beneath the cell-free zone, contains a dense population of fibroblasts along with undifferentiated mesenchymal cells. Copyright © JobScholar. All rights reserved.
প্রশ্ন 33 সঠিক উত্তর: C
Alveolar group of periodontal fiber includes -
A. Circular group
B. Dento periosteal group
C. Inter radicular group
D. Trans septal group
Explanation:
The interradicular fiber group, running between the roots of multirooted teeth into the interradicular alveolar bone, is one of the principal alveolodental (alveolar) fiber groups. Copyright © JobScholar. All rights reserved.
প্রশ্ন 34 সঠিক উত্তর: A
In regenerative endodontics recommended irrigation protocol is-
A. Na OCI + EDTA
B. CHX + Ca (OH)2
C. EDTA only
D. Saline + CHX
Explanation:
Sodium hypochlorite for disinfection followed by EDTA to remove the smear layer and release dentin matrix growth factors is the commonly recommended irrigation protocol in regenerative endodontic procedures. Copyright © JobScholar. All rights reserved.
প্রশ্ন 35 সঠিক উত্তর: B
Myocardial infarction will lead to increase in serum level of following enzyme -
A. Alanine aminotransferase
B. Creatine kinase
C. Glucose-6-phosphatase
D. Alkaline phosphatase
Explanation:
Creatine kinase (particularly the CK-MB isoenzyme) is released from damaged myocardium and is a classic cardiac biomarker for myocardial infarction. Copyright © JobScholar. All rights reserved.
প্রশ্ন 36 সঠিক উত্তর: C
Mental nerve block anesthetises
A. Floor of the mouth
B. Tip of the tongue
C. Lower lip
D. Part of half of upper lip
Explanation:
The mental nerve block anaesthetizes the skin and mucosa of the lower lip and chin on the side of injection. Copyright © JobScholar. All rights reserved.
প্রশ্ন 37 সঠিক উত্তর: C
Acute Odontogenic pain is caused by
A. Chromic open pulpitis
B. Chromic close pulpitis with apical lesion
C. Acute close pulpitis
D. Cusp fracture
Explanation:
Acute (closed) pulpitis produces intense, often spontaneous pain due to pressure build-up within the confined pulp chamber, making it a classic cause of acute odontogenic pain. Copyright © JobScholar. All rights reserved.
প্রশ্ন 38 সঠিক উত্তর: A
In chronic osteomyelitis
A. Sequestrectomy needed
B. Dredging method required
C. Enucleation needed
D. Profuse bleeding occurs
Explanation:
Chronic osteomyelitis often forms necrotic bone fragments (sequestra) that must be surgically removed (sequestrectomy) for resolution of the infection. Copyright © JobScholar. All rights reserved.
প্রশ্ন 39 সঠিক উত্তর: C
True adhesion occur in the following materials with tooth structure -
A. Amalgam
B. Gold inlay
C. Polycarboxylate cement
D. Titanium alloy
Explanation:
Polycarboxylate cement chemically bonds to calcium in tooth structure via its carboxyl groups, providing true adhesive bonding, unlike the purely mechanical retention of amalgam, gold or titanium. Copyright © JobScholar. All rights reserved.
প্রশ্ন 40 সঠিক উত্তর: B
Effective treatment of open bite is
A. Orthodontic labial bow
B. Segmental jaw corrective surgery
C. Howley retainer
D. Maxillary advancement surgery alone
Explanation:
Skeletal open bite often requires orthognathic (segmental jaw corrective) surgery to reposition the dento-alveolar segments and achieve proper occlusion. Copyright © JobScholar. All rights reserved.
প্রশ্ন 41 সঠিক উত্তর: B
Which cell is decreased profoundly in case of AIDS?
A. B-lymphocyte
B. CDa lymphocyte
C. CD₁ lymphocyte
D. T lymphocyte
Explanation:
HIV selectively infects and destroys CD4+ T-helper lymphocytes, causing their profound depletion, which is the hallmark of AIDS progression. Copyright © JobScholar. All rights reserved.
প্রশ্ন 42 সঠিক উত্তর: B
Alveolar bone is -
A. An immature type of bone
B. A part of periodontium
C. Derived from 1st pharyngeal arch
D. Found in edentulous ridge
Explanation:
Alveolar bone, along with cementum, periodontal ligament and gingiva, is one of the four components of the periodontium. Copyright © JobScholar. All rights reserved.
প্রশ্ন 43 সঠিক উত্তর: B
In full denture
A. Initial impression is taken by rubber base material
B. Post dam is important for good retention of upper full denture
C. Rubber cap in upper full denture is a simple method of good retention
D. Implant supported lower full denture is essential
Explanation:
A well-formed posterior palatal seal (post dam) creates a peripheral seal that is important for good retention of an upper complete denture. Copyright © JobScholar. All rights reserved.
প্রশ্ন 44 সঠিক উত্তর: C
The property that makes acrylic resin suitable for denture bases is -
A. High thermal conductivity
B. High solubility
C. Light weight and easily moldable
D. Needs no polymerization
Explanation:
Acrylic resin is favoured for denture bases largely because it is lightweight, easily processed/moldable, and relatively inexpensive. Copyright © JobScholar. All rights reserved.
প্রশ্ন 45 সঠিক উত্তর: C
Which of the following is a mass-level approach for preventing both dental carries and periodontal disease?
A. Clinical diagnosis
B. Dental sealants
C. Oral health education and awareness programs
D. Screening of caries and periodontitis
Explanation:
Community-wide oral health education and awareness campaigns are a mass, population-level preventive approach addressing both caries and periodontal disease, unlike individual clinical interventions. Copyright © JobScholar. All rights reserved.
প্রশ্ন 46 সঠিক উত্তর: D
Maximum tooth tissue reduction is needed for
A. PFM crown
B. Zirconia crown
C. Metal crown
D. All ceramic crown
Explanation:
All-ceramic crowns require greater tooth reduction than metal or PFM crowns to provide adequate bulk for the more brittle ceramic material's strength and aesthetics. Copyright © JobScholar. All rights reserved.
প্রশ্ন 47 সঠিক উত্তর: B
Which organism can cause infective endocarditis after dental procedure?
A. E. coli
B. Viridans streptococci
C. Clostridium tetani
D. Bacilluspecies
Explanation:
Viridans group streptococci, normal oral flora that can enter the bloodstream during dental procedures, are the classic cause of dental-procedure-related infective endocarditis. Copyright © JobScholar. All rights reserved.
প্রশ্ন 48 সঠিক উত্তর: D
In sterilization -
A. spore bearing bacteria are removed by boiling water for 1 hour
B. Sharp instruments are sterilized by hot air sterilizer
C. Blunt instruments are sterilized by boiling
D. Cotton can be sterilized by autoclave
Explanation:
Cotton and other porous/fabric items can be effectively sterilized using steam under pressure in an autoclave. Copyright © JobScholar. All rights reserved.
প্রশ্ন 49 সঠিক উত্তর: C
Which one is true for Precancerous lesion?
A. Leokoplakia is less common
B. Oral submucous fibrosis produced lock jaw
C. Erythroplakia is more prone to develop cancer
D. Antifungal drugs are essential for treatment
Explanation:
Erythroplakia has a substantially higher rate of malignant transformation compared to leukoplakia, making it the more concerning precancerous lesion. Copyright © JobScholar. All rights reserved.
প্রশ্ন 50 সঠিক উত্তর: D
Which one is true for Jaw benign tumor-
A. Osteoma is common
B. Chronic osteomyelitis is often associated
C. Amelobastoma is more common in maxilla
D. Multilocular Ameloblastoma is more common in mandible
Explanation:
Ameloblastoma occurs predominantly in the posterior mandible and frequently shows a multilocular ('soap bubble') radiographic pattern. Copyright © JobScholar. All rights reserved.