Maxillary First Molar
Maxillary First Molar - Related Videos
01:54
Molar Mass
0 Views •
2020
The identity of a substance is defined not only by the types of atoms or ions it contains but by the quantity of each type of atom or ion. For example, water, H2O, and hydrogen peroxide, H2O2, are alike in that their respective molecules are composed of hydrogen and oxygen atoms. However, because a hydrogen peroxide molecule contains two oxygen atoms, as opposed to the water molecule, which has only one, the two substances exhibit very different properties. Atoms and molecules are extremely...
09:30
Methods for the Study of the Zebrafish Maxillary Barbel
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Cited by 7 •
2009
The zebrafish maxillary barbel is an integumentary sense organ containing ectodermal, mesodermal and neural crest derivatives. Importantly, the adult barbel can regenerate after proximal amputation. This video introduces maxillary barbel development and demonstrates a surgical protocol to induce regeneration, followed by collection, embedding and downstream imaging of barbel specimens.
01:27
Determination of Molar Masses of Polymers II
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2026
Polymer samples typically consist of macromolecular chains with a distribution of lengths, resulting in a range of molar masses rather than a single discrete value. Conventional descriptors such as the number-average molar mass and weight-average molar mass quantify this distribution but do not fully capture polymer behavior in solution..The viscosity-average molar mass provides a more realistic description of polymer behavior in solution because it accounts for the enhanced contribution of...
01:24
Determination of Molar Masses of Polymers I
0 Views •
2026
Polymerization produces macromolecules with a range of chain lengths due to the random nature of molecular growth processes. As chains form and terminate at different stages, a single polymer sample contains molecules of varying sizes rather than a uniform structure. This variability is described using average molar masses and distribution-related parameters, which together provide a comprehensive understanding of polymer characteristics.The distribution of molar masses plays a critical role in...
03:43
Applications of the Ideal Gas Law: Molar Mass, Density, and Volume
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2020
The volume occupied by one mole of a substance is its molar volume. The ideal gas law, PV = nRT, suggests that the volume of a given quantity of gas and the number of moles in a given volume of gas vary with changes in pressure and temperature. At standard temperature and pressure, or STP (273.15 K and 1 atm), one mole of an ideal gas (regardless of its identity) has a volume of about 22.4 L — this is referred to as the standard molar volume. For example, one mole each of hydrogen, oxygen,...
FAQs
The broad occlusal surface distributes contact across several elevated cusps, while the oblique ridge contributes to the tooth’s occlusal organization. As the tooth meets opposing mandibular molars, these structures help break down food efficiently. Their arrangement also provides important landmarks when clinicians assess wear, caries, occlusion, or the design of a restoration.
The three roots anchor the tooth within the maxilla and contain the canals that communicate with its pulp. This root configuration affects how clinicians interpret images, plan access, and consider treatment when the pulp is diseased. It also matters during extraction because the roots provide multiple structures that must be evaluated individually.
Pulp anatomy determines whether endodontic treatment must address one or more canals within the tooth’s roots. Clinicians therefore correlate crown morphology, root configuration, and radiographic findings before planning treatment. Recognizing the internal anatomy helps guide access and canal treatment while reducing the risk that a diseased portion remains untreated.
Radiographic interpretation should consider the crown’s occlusal morphology, the three-root configuration, the internal canals, and the tooth’s relationship to the maxillary sinus. These features help connect visible anatomy with possible pulpal disease, restoration needs, or extraction planning. The combined assessment is more informative than evaluating the crown or roots alone.
Evaluation begins with examination of the crown, occlusal surface, roots, pulp anatomy, and surrounding relationship to the maxillary sinus. Radiographs support this assessment by showing structures that may not be visible clinically. The findings help determine whether the tooth requires preventive care, restoration, endodontic treatment, or extraction.
Its early vulnerability to caries makes preventive assessment important soon after the tooth becomes clinically relevant. Clinicians should pay close attention to the broad occlusal surface and its grooves and structural landmarks during examination. Detecting disease early can support timely preventive care or restoration before more extensive pulp and root treatment becomes necessary.