a. Veillonella b. Ruminococcus
c. Megasphaera d. None of the above
152. The mucous membrane which covers the alveolar process to the necks of the teeth
a. May be divided into the epimysin and fornix
b. May be divided into the alveolar mucosa and gingival
c. Is the tubercle of the oral mucosa
d. Is none of the above
153. The blood dyscrasia which has racial predilection is
a. Sickle cell anemia b. Thrombocytopenic purpura
c. Hemphilia d. cryoglobulinemia
154. Congenital micrognathia usually occurs in association with:
a. Pierre Robin syndrome
b. Trauma to temporomandibular joint
c. Parry-Romberg syndrome
d. Double lip
155. In the cap stage, which of the following cell types can be recognized in the enamel organ?
a. Outer enamel epithelium, inner enamel epithelium, and stelalte reticulum
b. Outer enamel epithelium and inner enamel epithelium
c. Outer enamel epithelium, inner enamel epithelium, and stratum intermedium
d. Stellate reticulum and dental papilla
156. Acute osteomyelitis has which of the following characteristics?
a. Is produced by beta – hemolytic streptococcus and pneumococcus
b. Necrosis of marrow with cellular reaction occurs
c. Sequestrum, suppuration
d. All of the above
157. It is customary to refer to airway ventilation as
a. Alveolar spaces b. Inspired volume
c. Free space d. Dead space
158. Firm pressure with the tip of the finger along a line where the dental arch joins the body of the mandible will reveal a sensitive spout about 2.5 cm lateral to the midline. This is the site of emergence of
a. The oral vestibule
b. The mental nerve from the mental foramen
c. The fauces d. The chin
159. Which of the following is the principal action of ammonia in syncope
a. Respiratory stimulation
b. Vasomotor stimulation
c. Improvement in nerve conduction
d. Cardiac stimulation
160. Radiographs of a patient demonstrated dense radiopaque cotton-wool appearance of the mandible and pronounced hypercementosis. These findings are suggestive of
a. Osteitis deformans b. Torus mandibular is
b. Complex composite odontoma d. Osteopertrosis
151. Ans: b. Ruminococcus
Exp: Ruminococcus is Gram-positive bacteria. Ruminococcus are non-motile organisms with a coccoid shape. Ruminococcus are anaerobic bacteria. They obtain nutrients by breaking down cellulose that comes through the digestive system of the host organism. These organisms are also capable of fermenting glucose and xylose. Ruminococcus do not produce spores.
152. Ans: b. May be divided into the alveolar mucosa and gingival
Exp: The oral mucosa is the soft tissue of the moth supporting dentures in the edentulous patient. The oral mucosa in the edentulous individual does not have the same resiliency as the oral mucosa of individuals with a full dentition. An uneven displacement of the soft tissues takes place in the edentulous individuals and must be taken into consideration in the construction of dentures.
153. Ans: a. Sickle cell anemia
Exp: Sickle cell anemia is an inherited condition. People with sickle cell anemia inherit two copies of the sickle cell gene, one from each parent. The sickle cell gene makes abnormal hemoglobin. In sickle cell anemia, the abnormal hemoglobin sticks together when it gives up its oxygen to the tissues. These clumps are like liquid crystals that cause red blood cells to become stiff and shaped like a sickle, or “C.” It takes two copies of the sickle cell gene for the body to make the abnormal hemoglobin found in sickle cell anemia. It’s most common in people whose families come from Africa , South or Central America (especially Panama Caribbean islands, Mediterranean countries (such as Turkey Greece Italy India Saudi Arabia
154. Ans: a.Pierre Robin syndrome
Exp: Pierre Robin syndrome is a triad of cleft palate micrognathia and glossptosis
155. Ans: a. Outer enamel epithelium, inner enamel epithelium, and stelalte reticulum
Exp: As the tooth bud proliferates, it undergoes unequal growth inn the different parts of the bud, leading to the formation of the cap stage. The cap stage consists of a shallow invagination on the deep surface of the tooth bud. The cap stage contains the following structures: outer and inner enamel epithelium, stellate reticulum (enamel pulp), dental papilla and dental papilla, and dental sac.
156. Ans: d. All of the above
Exp: Micro organisms may reach bone tissue through a wound, may spread to bone from adjacent tissues, or may be transported to be tissue by way of the blood stream, producing osteomyelitis. Both bone and marrow tissue and periosteum are infected during osteomyelitis. Osteomyelitis is caused by bacteria and only occasionally by fungi and non bacterial organisms. Staphylococci is the most common organism to produce osteomyelitis. However, streptococci (in infants) and gram – negative bacilli may be causative organisms. Salmonella spreads by way of the blood stream to cause osteomyelitis in patients with sickle cell anemia.
157. Ans: d. Dead space
Exp: Pulmonary ventilation in normal subject at rest is relatively constant at given level in response to the carbon dioxide tension, hydrogen ion concentration, and oxygen tension is specific sites.
158. Ans: b. The mental nerve from the mental foramen
Exp: The mental nerve emerges at the mental foramen and divides beneath the depressor anguli oris into three branches. One branches ascend to the skin and mucous membrane of the lower lip. The latter branches ascend to the skin and mucous membrane of the lower lip. The latter branches communicate freely with the mandibular branch of the facial nerve
159. Ans: a. Respiratory stimulation
Exp: The principal action of ammonia in syncope is Respiratory stimulation
160. Ans: a. Osteitis deformans
Exp: Also known as Paget disease of bone The term cotton-wool is used to describe the radiographic appearance of bone in Paget disease of bone. In the area of the maxilla and mandible this cotton-wool image is accompanied by areas of hypercementosis. Paget's disease may be diagnosed using one or more of the following tests: Pagetic bone has a characteristic cotton wool appearance on x-rays. An elevated level of alkaline phosphatase in the blood in combination with normal calcium, phosphate, and aminotransferase levels in an elderly patient are suggestive of Paget's disease.Bone scans are useful in determining the extent and activity of the condition. If a bone scan suggests Paget's disease,he affected bone(s) should be x-rayed to confirm the diagnosis.
FOR MORE IN DENTISTRY: VISIT
RxDENTISTRY
LOVEHUES
DENTAL MATRIX
No comments:
Post a Comment