Bone can be induced to grow at surgically created sites by the method called:

 # Bone can be induced to grow at surgically created sites by the method called:

A. Osteogenesis

B. Distraction osteogenesis

C. Bone wax

D. Green stick fracture

The correct answer is B. Distraction osteogenesis.

• Distraction osteogenesis is the method of inducing bone to grow at surgically created sites. 

• Russian Surgeon Ilizarov discovered in 1950's that if cuts were made through the cortex of a long bone of the limbs, the arm or leg then could be lengthened by tension to separate bony segments. 

• Currently it is believed that best results are obtained if this type of distraction starts after a few days of initial healing and callus formation and if the segments are separated at a rate of 0.5 - 1.5 mm/day. 

• Also this technique is employed for lengthening of mandible and inducing maxillary growth by separating cranial and facial bone at their sutures. 

Perspiration and redness of the cheek and ear after eating

 # A 58-year-old woman underwent left superficial parotidectomy for a pleomorphic adenoma 2 years ago. She presents with complaints of occasional perspiration and redness of the left cheek and ear after eating. Which of the following nerves is the most likely source of these complaints? 

A. Great auricular

B. Frontal branch of the facial nerve

C. Auriculotemporal

D. Lingual

The correct answer is C. Auriculotemporal.

The auriculotemporal syndrome is an unusual phenomenon, which arises as a result of damage to the auriculotemporal nerve and subsequent reinnervation of sweat glands by parasympathetic salivary fibers.

The patient typically exhibits flushing and sweating of the involved side of the face, chiefly in the temporal area, during eating. The severity of this sweating may often be increased by tart foods. Of further interest is the fact that profuse sweating may be evoked by the parenteral administration of pilocarpine or eliminated by the administration of atropine or by a procaine block of the auriculotemporal nerve.

Reference: Shafer's Textbook of Oral Pathology, 7th Edition.

The diameter of the tip of a periodontal probe is:

 # The diameter of the tip of a periodontal probe is:

A. 0.25 mm

B. 0.5 mm

C. 0.75 mm

D. 1 mm

The correct answer is B. 0.5 mm.

Periodontal probes are used to measure the depth of pockets and to determine their configuration. The typical probe is a tapered, rodlike instrument calibrated in millimeters, with a blunt, rounded tip. There are several other designs with various millimeter calibrations. The World Health Organization (WHO) probe has millimeter markings and a small, round ball at the tip. Ideally, these probes are thin, and the shank is angled to allow easy insertion into the pocket. Furcation areas can best be evaluated with the curved, blunt Nabers probe. When measuring a pocket, the probe is inserted with a firm, gentle pressure to the bottom of the pocket. The shank should be aligned with the long axis of the tooth surface to be probed. Several measurements are made to determine the level of attachment along the surface of the tooth.

Reference: Carranza's Clinical Periodontology 12th edition.

Which of the following may create gingival deformities that require gingivoplasty to eliminate the defects?

 # Which of the following may create gingival deformities that require gingivoplasty to eliminate the defects?

A. Erosive linchen planus 

B. Desquamative gingivitis 

C. Acute herpetic gingivostomatitis 

D. Necrotising ulcerative gingivitis 

The correct answer is D. Necrotising ulcerative gingivitis.

■ Shelf-like gingival margins after healing may result in plaque accumulation. 

■ The gingiva is reshaped with periodontal knife or with electrosurgery. This process of eliminating the defects by reshaping is called as gingivoplasty. 

■ Gingival deformities are seen in gingival disease:  (Asked in AIIMS 1999) (ANUG) 

Surgical procedure for severe tissue destruction in ANUG infection is:  (Asked in COMED 2011) (Reshaping the gingiva, Gingivoplasty)