Dentosphere : World of Dentistry

# Koch postulates were modified for periodontitis by (A). Socransky (B). Glickman (C). Carranza (D). Orban The correct answer is: A. Socransky

You must have gaped when you first time heard your dentist's fee for a single appointment if you live in North America, Europe or Australia. Although, dentistry is much cheaper in South Asia and other parts of the world not mentioned above, dentists make a good income and their earning rises over years as they gain more clinical experience. But, you may be thinking it is not justified that some dentists charge thousands of dollars for the work of an hour or two. Let's see some of the possible causes why dental treatment is so expensive. A. Dentistry is not only about knowledge Dentists gain their expertise in dentistry after long years of study, clinical practice and experience which really has no shortcuts. Knowing the thing is not enough, dentists have to visualise and do the procedures in the same ideal way everytime they do something. Precision and manual dexterity is something that develops after years of practice and an inquisitive mind. If  you don't regard you...

# Following bilateral mandibular fracture in the canine region, the following muscles will tend to pull the mandible back: A. Genioglossus and anterior belly of digastric B. Genioglossus and mylohyoid C. Genioglossus and thyrohyoid D. Genioglossus and masseter The correct answer is A. Genioglossus and anterior belly of digastric - Symphysis fracture displacement result from action of mylohyoid muscle resulting from imbalance of action of museles attached to genial tubercles on either side. - Bilateral fracture in canine region when run obliquely forward muscles acting on it are geniohyoid and genioglossus and anterior belly of digastric muscles. - Lateral pterygoid muscles inserted into medial fossa on anterior aspect of condyle. - In condylar fracture head is displaced anteriorly and medially CLICK HERE TO SHARE THIS ON FACEBOOK

# The Lesion which is erythematous and with recurrent vesicles that are distributed along the sensory nerve trunk is? (A). Herpes Zoster ( B). Erythema Multiforme (C). Recurrent Aphthous (D). Herpes Gingivostomatitis The correct answer is A. Herpes Zoster. VARICELLA-ZOSTER VIRUS INFECTIONS HERPES-ZOSTER (SHINGLES) Herpes Zoster is a recurrent regional infection caused by the Herpes Zoster virus and is characterized by vesicular eruptions over the  skin and mucous membrane in a distinctively unilateral pattern. Pathogenesis After producing chickenpox, the V-Z virus remains dormant in the trigeminal ganglion for decades. The virus may become  reactivated following stress, trauma, malnutrition and immune suppression, etc. Clinical Features The first branch of the trigeminal nerve is most commonly affected and the disease beside affecting the first branch, may also  involve the following other branches like: - Nasociliary nerve-Causing herpetic Keratit...

# All of these are principal fibers of Periodontal ligament except: A. Dentoalveolar crest fibers B. Apical fibers C. Horizontal fibers D. Transseptal fibers The correct answer is:  D. Transseptal fibers Principal Fibers of Periodontal Ligament are: - Alveolar crest, - horizontal , - oblique , - apical , and - interradicular fiber bundles

# Pharynx extends up to which cervical vertebra? [Nepal Medical Council, Dec 2019] A. C3 B. C4 C. C5 D. C6 The correct answer is D. C6 Pharynx The word throat is used for the parts of the neck anterior to the vertebral column, especially the pharynx and the larynx. The pharynx is the part of the digestive system situated posterior to the nasal and oral cavities and posterior to the larynx. It is therefore divisible into nasal, oral, and laryngeal parts: the (1) nasopharynx, (2) oropharynx, and (3) laryngopharynx. The pharynx extends from the base of the skull down to the inferior border of the cricoid cartilage (around the C6 vertebral level) , where it becomes continuous with the esophagus. Its superior aspect is related to the sphenoid and occipital bones and the posterior aspect to the prevertebral fascia and muscles as well as the upper six cervical vertebrae. The pharynx is a fibromuscular tube lined by mucous membrane.

# Pharynx extends up to which cervical vertebra? [Nepal Medical Council, Dec 2019] A. C3 B. C4 C. C5 D. C6 CLICK HERE FOR CORRECT ANSWER WITH EXPLANATION