Dental and Oral Biology

Dental plaque is a also termed as a biofilm found on tooth surfaces.

Oblique fibres are the largest group among the principal fibres and they are also the ones which bear the brunt of vertical masticatory stresses. They convert them into tension on the alveolar bone.

Horizontal component of the furcation is the parameter that governs the major classification systems of furcation involvement. Naber's probe is specially designed to assess the horizontal component only.

All the above mentioned drugs can cause hyperplasia of gingival. Anticonvulsants, calcium channel blockers and immune suppressants are the drugs commonly responsible for the same.

Stippling though a feature of attached gingival is seen in only 40% of the individuals.

 Increased tooth mobility is the characteristic sign of TFO ie: trauma from occlusion.

Refractory Periodontitis was coined in 1989 classification of periodontal diseases. It existed for a decade as a separate disease till 1999 when it was removed from the classification. A new term called recurrent periodontal disease was coined.

Periodontometer is a device invented by Muhlemann. It is a standardized method of measuring even minor tooth displacement. Periotest is a device to measure mobility of teeth as well as implants.

It is a facultatively aerobic, Gram +ve coccus-shaped bacteria. It is commonly found in the human oral cavity. It causes tooth decay in humans.

It is the larger of the two muscles of the tympanic cavity. Its role is to dampen sounds, such as those produced from chewing.

Enamel is secreted from ameloblasts, which are derived from oral epithelium tissue of ectodermal origin.

It is the outermost layer of the epidermis, consisting of dead and desquamating cells.

This type of teeth are found in vertebrates where each tooth is embedded in a socket of jaw bone that makes the attachment strongest.

This is correct answer. Vincent infection is contraindicated for extraction of teeth.

 Compound fracture: these fractures have a communication with the external environment, usually by the periodontal ligament of a tooth, and involve all fracture of the tooth-bearing portions of the jaws.