histology chapter 14.txt

supporting soft and hard dental tissue between and including parts of the alveolar bone

includes the cementum, alveolar bone, and periodontal ligament

part of the periodontium that attaches the teeth to the alveolar bone by anchoring the periodontal ligament

in health, cementum is not clinically visible.
True False

a hard tissue that is thickest at the tooth apex and in the interradicular area and thinnest at the CEJ

main component cementum

Cementum forms after the disintegration of_______

Disperses to cover the root dentjn area

The cementoblast undergo____and begin laying down cemetoid

What is formed because of the apposition of cementum over the dentin

Composition of cementum

A portion of collagen fibers from the perio ligament...each partially incerted into the outer portion of cement @ 90 degrees

Organized to function as a ligament between the tooth and alveolar bone

Entrapped cementoblast included in the cells of cementum

Each cementocyte lies within this

The removal of cementum

Results from the removal of cementum by odontoclast

When stained...reversal lines appear as a scalloped line
True False

Apposition of cementum is noted by layers of growth aka

Reversal and arrest lines are prominent in cementum that has been subjected to trauma
True False

Does cementum continually repair itself like bone does

Calcified bodies of cementum found to the root surface or lying free in the periodontal ligament space

Symmetricle spheres of cementum attached to the root surface and can be Found near the CEJ

2 types of cementum formed by cementoblast

CONSISTS OF THE FIRST LAYER OF CEMENTUM DEPOSITED AT THE DCJ AND IS ALSO CALLED THE PRIMARY CEMENTUM

PRIMARY CEMENTUM IS ALSO KNOW AS....

DOES THE WIDTH OF ACELLULAR CEMENTUM EVER CHANGE

CONSISTS OF THE LAST LAYER OF CEMENTUM DEPOSITED OVER THE ACELLULAR CEMENTUM

AKA KNOWN AS SECONDARY CEMENTUM

THIS COVERS MAINLY THE APICAL ONE THIRD OF THE ROOT.

CAN THE CELLULAR CEMENTUM CHANGE WIDTHS DURING THE LIFETIME OF THE TOOTH

EXCESSIVE PRODUCTION OF CELLULAR CEMENTUM; MAINLY OCCURS AT THE APEX OF THE TOOTH.

PART OF THE MAXILLA OR MANDIBLE THAT SUPPORTS AND PROTECTS THE TEETH

MATURE ALVEOLAR BONE IS BY WEIGHT....

NORMAL NATURAL MOVEMENT - ALL THE TEETH MOVE SLIGHTLY TOWARD THE MIDLINE OF THE ORAL CAVITY OVER TIME

PORTION OF BONE THAT IS FOUND APICAL TO THE ROOTS OF THE TEETH

PORTION OF BONE THAT CONTAINS THE ROOTS OF THE TEETH

THE 2 DIVISION OF THE ALVEOLAR BONE

COMPONENTS OF THE ALVEOLAR BONE PROPER AND THE SUPPORTING ALVEOLAR BONE

LINING OF THE TOOTH SOCKET

TOOTH SOCKET

ALVEOLAR BONE PROPER

CONTAINS VOLKMANN'S CANALS

ALSO CALLED BUNDLE BONE

WHEY IS THE THE ALVEOLAR BONE PROPER ALSO CALLED THE BUNDLE BONE

UNIFORMLY RADIOPAQUE PROTION OF THE ALVEOLAR BONE PROPER

WHY IS THE LAMINAL DURA IMPORTANT WHEN STUDING THE RADIOGRAPHS

THE MOST CERVICAL RIM OF THE ALVEOLAR BONE PROPER

the portion of the alveolar crest that is between the teeth seen on an xray is a radiopaque triangle @ the most superior portion of the interdental bone
True False

consist of plates of compact bone on the facial and lingual surfaces of alveolar bone

cancellous bone located between the alveolar bone proper and the plates of cortical bone

alveolar bone between 2 neighboring teeth

alveolar bone between the roots of the sam tooth

made up of both alveolar bone proper and trabecular bone

only a portion of this bone/septum can be seen on a bwx

easily seen on both pa's and bwx

consists of the compact bone of the alveolar bone proper and cancellous bone of the trabecular bone

maxilla and madible are developed from tissue of which branchial arch

the maxilla forms within the ______

the mandible forms from within the _________________--

both jaw bones begin as small centers of ______________-

the intramembranous ossification is located where

maxilla's primary center apperars around which week of prenatal development

where is the maxilla center located

during which week does the mandible begin to develop

week the first bone tissue in the body of the mandible forms

developmental disturbance with the alveolar bone in which tooth germs are congenitally absent - also affects the devlopment of the alveolar process.

part of the periodontium that provides attachment of the teeth to the surrounding bone

appears on xrays as a radiolucent area between the lamina dura(opaque) and the cementum(opaque)

organized fibrous connective tissue that maintains the gingiva's proper relationship to the teeth

transmits occlusal forces from the teeth to the bone-acting as a shock absorber for the soft tissues around the teeth

two types of nerves found within the PDL

the nerve supply, lymphatics and vascular supply of the PDL enters the tooth @ _____________

the tissues of the PDL supply the pulp
True False

componets of the PDL

is the PDL a connective tissue

most common cell in the PDL

present in the PDL @ the periphery of the alveolar bone proper

the PDL has osteoclast as well as odontoclasts
True False

present in the mature PDL after disintegration of Hertwig's epithelial root sheath

can become cystic usually forming nondiagnostic, radiolucent apical leasions-can usually be seen on radiographs

can the eptihelial rests of Malassez reoccur after surgical removal

used in the treatment of bone loss and disorganization of the PDL caused by perio disease-increases bone levels and strengthen the PDL

most of the fibers in the PDL - organized groups according to their orientation to the marure tooth-resembles spliced ropes

distribute forces due to speech, mastication.etc...protecting the soft tissue and allowing some give

main principal fiber group of the PDL

5 fiber groups of the alveolodental ligament - on multirooted teeth

overall function of the alveolodental ligament

originates in the alveolar crest of the aloveolar bone proper - fans out to insert into the cervical cementum

helps to resist tilting, intrusive, extrusive and rotational forces

originates in the alveolar bone proper-apical to its alveolar crest - inserts into the cementum horizontally

function is to resist tilting froces which work to force the tooth to tip either mesial, distal, ligual, or facial - resist rotational forces

most numerous of the fiber goup - covers the apical two thirds of the root - originates i the alveolar bone proper and extends apically to insert into the cementum in an oblique manner

resist intrusive forces- these try to push the tooth inward as well as rotational forces

radiate from the apical region of the cementum - inserts into the surrounding alveolar bone proper

resists extrusive forces-tries to pull the tooth outward and retational forces

found only on multirooted teeth-inserted on the cementum of one root to the cementum of the other root-superficial to the interradicular septum- no bony attachment

works with the alveolar crest and apical groups-resist intrusive extrusive tilting and rotational forces

inserts mesiodistal or interdental into the cervical cementum of neighboring teeth

travels from cementum to cementum without any bony attachment

function: resist rotational forces thus hold the teeth in interproximal contact

found within the lamina propria of the marginal gingival-separate but adjacent fiber groups

support only the marginal gingival tissues to maintain their relation to the tooth

occlusal trauma does not cause periondontal disease-but it can cause acceleration in its progression
True False

remains the longest despite the previous destruction of the ligament

congenitally missing teeth

provides for the attachment of the teeth to the surrounding bone

the PDL appears as a ____ ____ of .4 to 1.5mm on an xray

most common cell in the PDL

present in the PDL at the periphery of the alveolar bone proper

can become cystic-usually forms nondiagnostic radiolucent apical leasions

first branchial arch cartilage

what week does the first bone tissue in the bondy of the mandible form