hey guys ok thu huu adn i had a lil study session today and we have a few questions that we were both unsure of and we just wanted to see what other people have said for these.. OK
- are the bones in the skull flat or irregular.. or neither.. ?
- Q9 of the oral histology workbook (draw a tabl of the structural variations of the oral mucosa) is this asking aboutt hemastictatory/lining/specialised mucosa... somethingsimilar to the table on Page 135 of bath balogh coz w weren't sure.
-Q10 of the Oral Hist. workbook... what is everyone drawing for this... I just draw the gingia against the tooth and labelled the JE the sulcular epith. The Oral epith the attached ging.free ging etc.... Is this what it is meant to be or have i interpreted it differently. ??
-What muscles would experience pain in associatin with overuse of the TMJ... We both had different answers and couldn't really jutify any of them :P
-Pre dentine.. is this the same as manytle dentine and circumpulpal dentine?? What is a definition for pre dentine and where is it coz we started confusing ourselves.
-Why is the tongue considered a specialised mucosa?? we had just described the appearance of the tongue and where it is specialised( taste buds) etc but didn't really think this answered the question???
- The periodontla ligament blood supply... Does this have anything to do with the PDL being continuous with the CT of the Gingiva?? but confused..
-Q7(PDL nad alveolar bone) trace the blood supply through the alveolar bone.. we both just had big ?.... where can we find info on this.. what should it be???
Thanks heaps guys
Hope its all good.
C yas Monday . :D
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10 comments:
OK, I'll try my best to answer these"
- bones in the skull are examples of flat bones
- yes, I interpreted the question as listing the different mucosa (masticatory, lining and specialised) and the lamina propria, then writing where they are found, general appearance and microscopic structure. Very similar to the table in bath balogh that you mentioned
- i think you have interpreted it correctly. I did something similar to what you did
- i said muscles of mastication would experience pain with overuse of the TMJ. Particularly the masseter, as that is the prime mover for elevation of the mandible. I said mastication muscles as these insert into the mandible which is part of TMJ. You could also say supra-hyoid muscles (particular anterior digastric, geniohyoid and mylohyoid) which are involved in depressing the mandible.
- yea, i mantle and circumpulpal dentine are the same as pre-dentine. Pre-dentin is the initial layer of dentine layed down by odontoblasts, it is the layer that separates the odontoblasts from the mineralised dentine. About 15-20 micrometres are laid down before mineralisation.
- i said the tongue was a specialised mucosa as it is a mass of striated muscle covered by oral mucosa. Also, I said the presence of taste buds (lingual papillae) made it different to the other types of oral mucosa.
- good question, I'm not 100% sure but I think it is supplied by the alveolar bone which contains numerous pores to supply PDL. Don't take my word on that though
- wouldn't that be just drawing spongy bone (with plenty of trabeculae) and maybe using a red pen to draw some lines through the trabeculae)...although you need to be a good drawer to make it look good...which I'm not, but I think thats what you need to do
Hope this helps,
Tim
About the blood supply for Periodontal lig. I agree with Tim, in our notes it says the alveolar bone proper aKa lamina dura contains numerous pores to allow blood vessels to connect with the PL space.
Sawwet thanks guys.. :D BIGGGG HELP...
Hi All
I have been tracing your comments and am so proud to watch you unravel all the learning together.
You have answered the questions well. With regard to the blood supply of the PDL, Yes it does receive its supply through the lamina dura but also through vessels that penetrate the apical foramen and travel superiorly through the PDL space.
Make sure you revise the junctional epithelium and know the different types of cell junctions we find between the basal cells and the internal and external basal lamina.
Also, check the anatomical variations of alveolar bone and their clinical significance.
Good luck I will checking the blog over the weekend if you have further questions.
Good luck
Sophie
i think.... the periodontal ligament's blood supply originates from arteries that enter through the apical foramen and from blood vessels in the adjacent bone marrow :]
Yes they do Thomas, dont forget that they penetrate the lamina dura as they pass through the bone marrow spaces of the tooth's socket.
Anyone remember the bone variations???
Are they just:
ALveolar crest, supporting alveolar bone, cortical bone, trabecular bone, interdental bone and interadicular bone?
I'm not quite sure.
If so, what are their clinical signifcance?
Duncan.. think of the different gingival biotypes and the type of bone that we sometimes find underneath the thin biotypes. Also, how does the thickness of bone vary in the different areas of the dental arches? Lastly, what type of bony defects could we find underlying connective tissues.. so what does this mean from a clinical perspective?
The cortical bone is thicker in the molar regions and thinner in the anterior and premolar regions.
There are two defects of the cortical bone; Fenestration and Dehiscence. These could result in recession, especially dehiscence as it's a cleft-like defect.
I think these are right.
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