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Cementum

06-11-2008
Cementum
Root cementum is visible as a tiny, slightly basophilic layer at the outer surface of the root part of the tooth and can be distinguished from dentin by the absence of tubuli. It obliterates the peripheral ends of the dentinal tubuli and lies adjacent to the mantle dentin. It is the product of fibroblasts from the dental follicle migrating to the root surface and differentiating into cementoblasts. Whether epithelial cells from Hertwig’s sheath contribute to initial cementum formation is controversial as has already been discussed.

Over the course of time, cells from the periodontal ligament may add new cemental layers to the root surface in which cells may become entrapped. Te cellular cementum formed 
in this way closely resembles bone and can only be identified as cementum by its location: covering a root surface. Deposition of cementum probably continues throughout life. It is superimposed upon the cementum that is formed initially during tooth formation. Collagen fibers from the periodontal ligament are embedded in the cementum, thus ensuring fixation of the tooth in its socket. Coronally, cementum ends where enamel starts. Usually, there is a slight overlap, cementum covering the cervical enamel over a short distance. However, an edge-to-edge border as well as a tiny gap between both tooth covering tissues may also be seen.

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Comments
Гость:
Nicole, Tempe AZ, November 18, 2008 at 4:16 pm Great offer, friendly staff and 8 sheads brighter teeth. Thank You Arizona Family dental for making my smile more beautiful.I will recommend you guys to all my facebook friends.Thanks You

Гость:
Fluorides are one of the most important facrots in strengthening the structure of the teeth, as they harden the enamel and tooth parts by reacting with them and forming compounds that are stable and harder. These are one of the reasons why enamel is considered the hardest part in the body. The fluorides are generally available in the toothpaste, but due to improper brushing technique, the fluorides are not well spread on the teeth surfaces. So there are fluoride rinses available, which equally spread the fluorides. The effects of these is two-fold, one is the prevention of tooth decay by making the surface harder, and second by reducing the dentinal hypersensitivity.

Гость:
March 11, 2010 at 3:03 pm | Back to topno, brad, no. we are music fans, therefore we base our oionipns on the important things like album art, press photos, what we heard other people say about the band, their earliest demos, what label they are on, what random rumor we heard about them from some guy we don’t know on some website we don’t read and most importantly based on what i had for breakfast.of course i base my opinion of blood and water entirely upon the collective haircuts your band has. nothing more, nothing less. http://docmcbsm.com [url=http://vsrlqxb.com]vsrlqxb[/url] [link=http://tebnerjntr.com]tebnerjntr[/link]

Гость:
March 14, 2010 at 8:16 pm | Back to topI’ll give the new album a listen but I’m not hilodng my hopes high. If all I have to judge is their myspace songs, well in that case I’ll give them a D. F is for failure and I don’t think they have achieved that status quite yet 😉 I know T N is a label bent on producing polished studio material so I expect this will be something of quality though you never know in this economic climate.Reply

Гость:
I’ve heard the record, and its pertty solid. It sounds vaguely like the songs on their myspace, but a HUGE improvement. Singing has improved a lot and so have the screaming less cookie monster and more raspy. That’s not to say there isn’t any br00tal screaming, but they are layered well.I have a feeling this album will shock people. And if you don’t like the full cd, you will like at least half.Reply http://fgbffzhpds.com [url=http://ponzviwpb.com]ponzviwpb[/url] [link=http://elrqiouoqhs.com]elrqiouoqhs[/link]

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Articles for theme “Histology”:
Enamel
06-11-2008
Enamel content is almost 100% mineral, so it evades histologic evaluation in common paraffin sections from decalcified material. Only in immature tooth tissues, may it be seen in routinely prepared histologic slides due to a still higher proportion of organic components, where it is visible as a slightly basophilic the ready material. In this form, it may also form part of the histologic appearance of odontogenic tumours. Examination of mature enamel requires the employment of ground sections.
Histology
11-10-2008
Teeth consist for the major part of dentin. This material houses the dental pulp, the soft tissue core of the tooth consisting of myxoid connective tissue with blood vessels and nerves, and supports the enamel cap that covers the part of the tooth that is exposed to the oral cavity. In the root area, dentin is covered by cementum that fixes the collagenous fibres of the periodontal ligament onto the root surface. At the other side, these collagenus fibres are attached to the bone of the tooth socket and in this way, the tooth is fixed in  the jaw.
Dentin Histology of the Teeth
07-06-2008
Dentin is a specialized kind of bone formed by the odontoblasts but different in the sense that it does not contain complete cells but only cellular extensions, i.e., cytoplasmic extensions from the odontoblasts. These cross the full thickness of the dentin from the odontoblastic cell body that lies at the border between dentin and dental pulp to the junction between dentin and enamel. The tiny canals that house the odontoblastic extensions are recognizable as evenly spaced tubuli. This tubular nature is the histologic hallmark for dentin, not only in teeth but also in odontogenic lesions in which the nature of each mineralized material may not be recognizable at first sight.