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Human Deciduous Mandibular Molar

Over All

The muscle involved in incisor clenching is the	Lateral pterygoid
The deciduous teeth erupt generally in a	Anterior - posterior sequence
The most common permanent teeth eruption in maxilla is	(6-1)-2-4-3-5-7-8
The difference between mesiodistal diameter width between premolars and deciduous molars is referred as	Leeway space
Curve of Spee is in a	Saggital plane
In a normal dentition, teeth are placed __________ degrees to the horizontal plane	15
Balanced occlusion is given by	Thielemann’s formula. Explanation  Balanced occlusion is ( condylar guidance*incisial guidance)/ ( curve of Spee* cusp height* plane of occlusion)
Mesiodistal inclination of the teeth is lowest with	Mandibular canine. The inclination is 0 degrees and maximum inclination is seen with maxillary canine and about 17 degrees. Similarly the minimum faciolingual inclination is about 5 degrees with maxillary first premolar and 28 degrees in maxillary central incisors.
The total number of possible occlusal contacts are	198
The process of swallowing requires a coordination of at least	20 muscles
The presence of overjet in molars prevents	Cheek biting
The supporting cusps are	Lingual cusp of maxilla and buccal cusp of mandible teeth
Multiple working side contacts are seen as a part of	Group function
The areas of contact that a supporting cusp makes with opposing teeth is	Centric stop
A phasic jaw-closing reflex is often evoked by a tap to __________ and denotes _____________.	Chin; pathology. Tonic type is normal
The muscle involved in incisor clenching is the	Lateral pterygoid
The deciduous teeth erupt generally in a	Anterior - posterior sequence

Oral Anatomy

Masseter is covered by	Platysma; Risorius; Parotid gland
Principal postioner of mandible during elevation is the	Temporalis
The fan shaped muscles of mastication is the	Temporalis
The antagonist muscle to masseter while retruding jaw is the	Posterior temporalis. The anterior pterygoid is synergistic with masseter while clenching.
The facial muscle(s) active during opening of jaw is(are)	Digastric group of muscles; Mylohyoid and geniohyoid; Lateral pterygoid
When the jaw is opened against resistance the	Temporalis remains silent
The antagonist muscle of elevator muscles is the	Digastric group of muscles; Mylohyoid and geniohyoid; Suprahyoid muscles
With mandible is retruded with mouth closed, the muscle involved are	Posterior fibers of temporalis; Suprahyoid fibers; Infrahyoid fibers
The duration of each chewing cycle is between	0.6 – 1 second
The chewing forces reaches a maximum with	Centric occlusion