tooth-supporting structures

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PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

TOOTH-SUPPORTING STRUCTURES:

TOOTH-SUPPORTING STRUCTURES Dr. Shafaq Salim 3/21/2014 prepared by: Dr Shafaq Salim

tooth-supporting structures???:

tooth-supporting structures??? The tissues that invest and support the teeth for function 3/21/2014 prepared by: Dr Shafaq Salim

Attachment Apparatus:

Attachment Apparatus Gingiva Alveolar bone Periodontal ligaments (PDL) Cementum 3/21/2014 prepared by: Dr Shafaq Salim

ORAL MUCOSA :

ORAL MUCOSA Oral mucosa is mucous membrane of mouth which lines the oral cavity & protect the underlying muscles, fats, nerves & blood supply. It has the ability to differentiate between hot, cold, touch & taste sensation 3/21/2014 prepared by: Dr Shafaq Salim

3 zones of oral mucosa:

3 zones of oral mucosa Masticatory mucosa Thick, keratinized Covers the hard palate and gums Lining mucosa very thin, non-keratinized Inside cheeks, floor of the mouth, lips, underneath the tongue and the soft palate Specialized mucosa On top of the tongue and consist of taste buds 3/21/2014 prepared by: Dr Shafaq Salim

Attachment Apparatus:

Attachment Apparatus 3/21/2014 prepared by: Dr Shafaq Salim

GINGIVA:

GINGIVA 3/21/2014 prepared by: Dr Shafaq Salim

It is the part of oral mucosa that covers the alveolar processes of jaw and surround the neck of teeth. :

It is the part of oral mucosa that covers the alveolar processes of jaw and surround the neck of teeth. Part of oral mucosa Covers the alveolar bone Surround the neck of teeth 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

Macro-Anatomy:

Macro-Anatomy 3/21/2014 prepared by: Dr Shafaq Salim

Classification:

Classification Anatomically, Marginal/Free gingiva Attached gingiva Inter-dental gingiva 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 Interdental gingiva prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

Attached Gingiva:

Attached Gingiva 3/21/2014 prepared by: Dr Shafaq Salim

Features of Attached Gingiva:

Features of Attached Gingiva Coral pink Orange peel like 3/21/2014 prepared by: Dr Shafaq Salim

Stippling:

Stippling 3/21/2014 prepared by: Dr Shafaq Salim

Pigmented Gingiva:

Basal Spinosum Prickle Granulosum Pigmented Gingiva 3/21/2014 prepared by: Dr Shafaq Salim

Inter-dental gingiva:

Inter-dental gingiva 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

Interdental gingiva Labio-lingual/Bucco-lingual Mesio-Distally 3/21/2014 prepared by: Dr Shafaq Salim

What is col?:

What is col? The region found in the inter-proximal areas of teeth where the inter-dental papilla shows a central concavity between the facial and lingual papillary apices; characterized by a thin non-keratinized epithelium. 3/21/2014 prepared by: Dr Shafaq Salim

Functions:

Functions ATTACHED GINGIVA The attached gingiva allow the gingival tissue to withstand the mechanical forces created during activity such as mastication speaking and tooth-brushing INTERDENTAL GINGIVA The inter-dental gingiva prevent food from becoming packed b/w the teeth during mastication 3/21/2014 prepared by: Dr Shafaq Salim

:

3/21/2014 prepared by: Dr Shafaq Salim

Overview :

Overview 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

Free Gingiva Attached Gingiva Interdental Gingiva Location : Coronally positioned around tooth. Unattached. Apical to free gingiva . Firmly attached to the tooth & underlying bone. Between the contact surfaces of teeth. Color : Coral pink Coral pink, physiogical pigmentaion . No difference Contou r: Knife edge Tapered If proximal contacts flat- Narrow and short. If convex- Wide & high. Consistency : Firm No difference No difference Texture : Smooth “Orange peel” Central portion-Stippled Marginal border- Smooth Keratinizatio n : Keratinized. Keratinized. Keratinized. Function : Surrounds teeth, forms wall of sulcus Withstands mechanical forces of brushing & prevents movement of free gingiva . Prevents food stagnation. 3/21/2014 prepared by: Dr Shafaq Salim

Gingival Sulcus:

Gingival Sulcus Shallow space b/w the marginal gingiva and the tooth surface. V-shaped & contains crevicular fluid Normal depth 1-3mm Bounded by, tooth on one side gingiva on other 3/21/2014 prepared by: Dr Shafaq Salim

Features of Healthy Gingiva:

Features of Healthy Gingiva COLOR Coral pink SHAPE Scalloped/ V-shaped CONSISTENCY Firm SURFACE TEXTURE Stippled POSITION OF MARGIN At the CEJ BLEEDING No bleeding on probing 3/21/2014 prepared by: Dr Shafaq Salim

Micro-Anatomy:

Micro-Anatomy Epithelium Connective tissue 3/21/2014 prepared by: Dr Shafaq Salim

Gingival Epithelium:

Gingival Epithelium keratinocytes Other cells found are, Clear cells/non-keratinocytes; langerhan merkel melanocytes 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

Oral epithelium: keratinised and extends from the free gingival margin to the mucogingival line. Sulcular epithelium : non- keratinised and lines the gingival crevice Junctional epithelium : non- keratinised and attached to the tooth surface by a basal lamina and hemidesmosomes 3/21/2014 prepared by: Dr Shafaq Salim

PERIODONTAL LIGAMENTS:

PERIODONTAL LIGAMENTS 3/21/2014 prepared by: Dr Shafaq Salim

It is the connective tissue that surrounds the root & connects it to the bone. :

It is the connective tissue that surrounds the root & connects it to the bone. Connective tissue Surrounds the root Connects it to the bone 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

Sharpey´s fibers Collagen type-I Imparts flexibility & strength 3/21/2014 prepared by: Dr Shafaq Salim

Groups of PDL:

Groups of PDL 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

Cellular Elements:

Cellular Elements Connective tissue cells -fibroblasts -osteobalsts & clasts -cementoblasts & clasts Epithelial rest cells of malassez -form latticework -diminish with age -Periapical & lateral root cysts Defense Cells -neutrophills -lymphocytes -macrophages -mast cells -eosinophills 3/21/2014 prepared by: Dr Shafaq Salim

Functions of PDL:

Functions of PDL 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

PHYSICAL Attachment of teeth to bone. Maintennance of gingival tissue in their proper position. Transmission of occlusal forces to the bone & shock absorption Protection of nerves & vessels from mechanical injury. FORMATIVE & REMODELLING Formation & resorption of collagen, cementum & bone; via, Fibroblasts Cementoblasts/clasts Osteoblasts/clasts In accomodation & response to, Physiologic tooth movement Occlusal forces Repair of injuries 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

NUTRITIONAL & SENSORY Supplies nutrients to cementum, bone & gingiva by way of blood vessels. Provides lymphatic drainage Contains sensory nerves capable of transmitting, Tactile merkel‘s Pain free nerve endings Pressure & vibration spindle-like ruffini-like & coiled meissner‘s corpuscles via trigeminal pathway. 3/21/2014 prepared by: Dr Shafaq Salim

3. CEMENTUM:

3. CEMENTUM 3/21/2014 prepared by: Dr Shafaq Salim

It is the avascular, calcified, mesenchymal tissue that forms the outer covering of the root.:

It is the avascular, calcified, mesenchymal tissue that forms the outer covering of the root. Avascular Calcified Mesenchymal tissue Forms the outer covering of root 3/21/2014 prepared by: Dr Shafaq Salim

Classification of Cementum:

Classification of Cementum 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 Acellular Cellular prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

Origin of Fibers:

Origin of Fibers EXTRINSIC Since the fibers were originally produced by periodontal ligament fibroblasts, they are considered "extrinsic" to the cementum . These fibers are orientated more or less perpendicularly to the cementum surface and play a major role in tooth anchorage INTRINSIC Fibers produced by cementoblasts and are orientated more or less parallel to the cementum surface. This form of cementum is located predominantly at sites undergoing repair, following surface resorption 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

Acellular afibrillar Acellular extrinsic Cellular intrinsic Cellular mixed 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

TYPE ORIGIN OF FIBERS LOCATION Acellular afibrillar - Coronal cementum Acellular Extrinsic Cervical third of roots Cellular Intrinsic Fills resorption lacunae Cellular Mixed stratified Apical third of roots Intermediate Ill-defined zone near cemento-dentinal junction 3/21/2014 prepared by: Dr Shafaq Salim

Cementoenamel Junction:

Cementoenamel Junction 3/21/2014 prepared by: Dr Shafaq Salim

Functions of Cementum:

Functions of Cementum Seal and covers the dentinal tubules and protect the underlying dentine. Attaches the periodontal fibers to the tooth. Compensates for attrition of teeth at their occlusal and incisal surface, cementum is formed at the apical areas of the root to compensate for loss of tooth tissue due to attrition. 3/21/2014 prepared by: Dr Shafaq Salim

4. ALVEOLAR BONE:

4. ALVEOLAR BONE 3/21/2014 prepared by: Dr Shafaq Salim

The alveolar processes are bony projections that forms and support the socket and protects the root of teeth. :

The alveolar processes are bony projections that forms and support the socket and protects the root of teeth. Bony projections Forms the socket Protects the root 3/21/2014 prepared by: Dr Shafaq Salim

Characteristics of Alveolar Bone:

Characteristics of Alveolar Bone Mineralized connective tissue Formed by osteoblasts Bone is rigid because calcium salts are deposited in its extra-cellular matrix. The alveolar bone has blood vessels and nerve innervation Bone constantly undergoes periods of bone formation and resorption. 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

Parts of Alveolar Bone:

Parts of Alveolar Bone External plate cortical bone Inner wall dental lamina forms inner wall of socket Trabecular bone btw external & inner 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

Innervation & Vascular Supply :

Innervation & Vascular Supply The gingiva of maxillary arch is innervated by, Superior alveolar nerve Infra-orbital nerve Greater palatine Naso-platine nerve The gingiva of mandibular arch is innervated by, Mental nerve Buccal nerve Lingual nerve Maxillary gingiva , pdl and alveolar bone, Ant & post superior alveolar arteries Infra-orbital artery Greater palatine artery Mandibular gingiva , pdl & alveolar bone, Inferior alveolar artery Branches of inferior alveolar artery ; Buccal , facial, mental & sub lingual arteries 3/21/2014 prepared by: Dr Shafaq Salim

Lymphatic System:

Lymphatic System The lymphatic system is an essential part of the immune system that helps body to fight infections. Sub- mandibular lymph node drain most of periodontal tissues Deep cervical lymph nodes drain the palatal gingiva of the max Sub-mental lymph nodes drain the gingiva in region of the mand incisors Jugulo-digastric lymph nodes drain the gingiva in third molar region. 3/21/2014 prepared by: Dr Shafaq Salim

PowerPoint Presentation:

3/21/2014 prepared by: Dr Shafaq Salim

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