Introduction to Periodontics
Dr. Fatin Awartani
Associate professor
Periodontal Department
Dr. Fatin Awartani
Definitions
Periodontics: That branch of dentistry
that deals with the diagnosis and
treatment of disease and conditions of
supporting and surrounding tissues of
the teeth or their implanted substitutes
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Periodontology: The scientific study of
the periodontium in health and disease
Periodontitis: Dental practitioner who
by virtue of special knowledge and
training in the field limits his practice or
activities to periodontics.
Periodontitis: Inflammation of the
supporting tissue of the teeth
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peri ..around
odous .. tooth
logous . Study
itis inflammation
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Periodontium
The tissues that invest and
support the teeth
including the:
Gingiva / Alveolar
Mucosa
Periodontal Ligament
Alveolar Bone
Cementum
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Gingiva: The fibrous investing tissues,
covered by keratinized epithelium, which
immediately surrounds a tooth and is
contiguous with a periodontal ligament and
with the mucosal tissues of the mouth
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Gingiva
Marginal / Free Gingiva
Attached Gingiva
Interdental Gingiva
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Gingival sulcus (crevice): Shallow
fissure (space) between the marginal gingiva
and the enamel or cementum. The clinical
normal gingival sulcus in human is 2 to 3 mm,
can be determined clinically with a
periodontal probe (probing depth).
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Histology: Gingival tissues are made up of
fibrous connective tissue covered by stratified
squamous epithelium.
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Gingival Collagen Fibers
Functions
1. Bracing the marginal gingiva against the tooth
2. Providing rigidity to withstand the forces of
mastication.
3. To unite the free marginal gingiva with the
cementum of the root and adjacent
attached gingiva
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Periodontal ligament (PDL): the CT that surrounds and
attaches roots of teeth to the alveolar bone. Average width of
PDL is 0.18 mm, widest in coronal aspect narrower in the
apex, and narrowest in the middle.
It consists of bundles of collagen fibers arranged into a
network referred as principle fibers.
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Roles of PDL:
Mechanical functions
Formative function
Nutritive function
Sensory function
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Cementum: is calcified tissue that
covers the root of the tooth and provides
a means of attachments for the
periodontal ligament fibers to the tooth.
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Cementum
It consists of calcified collagen fibers and
interfibriller ground substance.
It is made up of 45% to 50% inorganic
material and 50% to 55% organic matter
and water.
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Alveolar bone: are the parts of the
maxilla and mandible providing the
housing for the roots of the teeth.
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Alveolar bone:
1- alveolar bone proper
(lamina dura in radiographs)
2- trabecular bone
3- compact bone
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Periodontium
Vascular Supply
Branches of Superior and inferior alveolar arteries
1. Supraperiosteal arteries
2. Interdental arteries
3. Periodontal ligament arterioles
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Functions of Periodontium
Attach tooth the bony housing an d to another tooth
Resist and resolve the forces generated by mastication,
speech and deglutition
Adjust for structural changes associated with wear and
aging through continuous remodeling and regeneration
Defined against the noxious external environment that are
present in the oral cavity
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Etiology of Periodontal
Diseases
Bacterial Plaque (Primary Factor)
Secondary/Predisposing Factors
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Bacterial Plaque
Bacterial aggregation on the teeth or
other solid oral structures.
It consists of:
Bacteria
Organic : protein, polysaccharide ..
Inorganic: calcium, phosphorus
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Secondary/Predisposing Factors
Dental Calculus: Mineralized dental plaque
attached and covering the enamel and/or root
surface.
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Classification of Periodontal
Disease
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The pathological diseases affecting
the periodontium
Gingivitis
Periodontitis
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Gingivitis
Inflammation of the gingiva.
It is the most common type
of gingival disease.
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Etiology is bacterial plaque
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Periodontitis
Inflammation of the supporting tissues of the
teeth.
Usually a progressively destructive changes
leading to loss of bone and periodontal
ligament.
An extension of inflammation from gingiva to
adjacent bone and ligament
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Amounts of microbial deposits are
consistence with the severity of bone loss
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Healthy
Gingivitis
Periodontitis
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Aim of Periodontal Therapy
Retention of Teeth
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Periodontal Therapy
- Eliminate gingival inflammation
- Oral hygiene
- Scaling and root planing
- Local or systemic antimicrobials
- Systemic collagenase inhibitor
- Restore normal tissue contours
- Tooth surfaces assessable to daily
oral hygiene
- Regenerate periodontal attachment
- Bone graft, guided tissue generation
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Scaling
Instrumention of the crown and root surfaces
of the teeth to remove plaque, calculus and
stains from these surfaces.
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Root Planing
A treatment procedure designed to remove
cementum or surface dentin that is rough,
impregnated with calculus or contaminated
with toxins or microorganisms
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Thanks
We will see you all inshallah in our main
two courses:
Third year 311PDS
Fourth year 411PDS
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