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Exodontia. Prof. Ragab Shaaban. Text book. Contemporary Oral and Maxillofacial surgery Peterson-Hupp. Surgical Removal of Teeth. (Transalveolar Extraction). Indications For TRANS-ALVEOLAR EXTRACTION. Any tooth that resists simple extraction. Brittle teeth:

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prof ragab shaaban

Exodontia

Prof. Ragab Shaaban

text book

Text book

Contemporary Oral and Maxillofacial surgery

Peterson-Hupp

slide3

Surgical Removal

of Teeth

(Transalveolar Extraction)

indications for trans alveolar extraction
Indications For TRANS-ALVEOLAR EXTRACTION
  • Any tooth that resists simple extraction.
  • Brittle teeth:

-Teeth w’ bulky fillings.

- Endodontically ttt. teeth.

- Teeth w’ internal decay.

3. Teeth withinsufficient crowns (severe attrition).

slide5
4. Teeth has complicatedroot patterns as shown in radiographs:

Teeth with widely divergent roots.

Tapering roots.

Hooked or curved roots.

Dilacerated roots.

Hypercementosed roots.

Ankylosed teeth.

slide7

Fusion

  • Dens Evaginatus(extra cusp) 
slide12
Also dental surgical procedure can be indicated for the removal of:
  • Traumatized teeth.

2. To make room for orthodontic manipulation

slide13

10.Teeth in certain systemic diseases:

  • Paget’s disease.
  • Cliediocranial dysostosis.

11. Retained roots.

12Teeth fractured during extraction.

.13. Teeth with root resorption.

slide14

Transalveolar Extraction

Standard Operative Plane:

  • Outline the extent of mucoperiosteal flap.
  • Bone removal.
  • Sectioning of the teeth.
  • Elevating of tooth from its socket.
  • Debridment of wound before closure.
  • Closure of the incision.
  • Post operative care.
access to the field of surgery
Access to the field of SURGERY
  • Is achieved by performing

A mucoperiosteal flaps.→

the flap is
The Flap is:
  • Outlined by a surgical incision.
  • Carries its own blood supply.
  • Allows surgical access to the underlying tissues.
  • Can be replaced to its original position.
  • Can be maintained with sutures & is expected to heal.
the goal in flap design
The Goal in Flap Design
  • A Chance to Cut is a Chance to Cure.

* Use a new knife with sharp blade [ for clean undamaged incision].

* Be assertive [ be confident].

* Use firm, continuous strokes.

* Repeated soft strokes increase amount of damaged tissues & amount of bleeding.

* Watch where you are going.

* Consider closure.

design parameters for soft tissue flaps
Design Parameters for soft tissue flaps
  • Size.
  • Anatomical landmarks.
requirements of mucoperiosteal flap
Requirements of Mucoperiosteal Flap
  • The incision should be designed to avoid injury to nerves & blood vessels in the region.
  • The incision must include the mucosa & periosteum; in one sharpclean cut until the bone is reached, to avoid tearing of the flap.
  • flap should have a base broader than the free margin, to maintain maximum bloodsupply to the tissues healing
slide22
4.The flap should be largeenough to fulfill the followings:

To expose all the area of operation.

To be retracted without tension on tissues during reflection.

To avoidlaceration & promote healing.

To cover the operative field after surgery, with the edgesof the flapresting on sound bone.

slide23
5 .The flap should be repositionedto cover the field of surgery & suture without tension, to avoid strangulation of vessels.

6. The vertical (oblique) incision should not alter thecontourof the gingival papillae to prevent necrosis of the soft tissues & alv. bone.

7. Excess flabby tissues in edentulous ridge must be excised to avoid soft flabby ridge.

types of flaps
Types of flaps

A variety of intra-oral soft tissue flaps.

  • Pyramidal flap.
  • Semilunar flap.
  • Gingival flap.
  • Palatal flap.
slide26

1. Semilunar flap :

  • A curved, horizontal incision where the convex portion nearest to the gingival crest.
  • The deepest part of the flap should be 5-10 mms from the starting and ending points, and 3mms at least from the depth of the gingival sulcus.

.

slide28

Advantages :

1.Simple to incise and reflect.

2.Close to the apical area of the tooth.

3.Requires minimal anesthesia.

4.No gingival recession.

5.Gingiva around crowns is not disturbed giving good esthetic result.

6.Patient can maintain good oral hygiene.

slide29

Disadvantages:

1. It gives minimal access & visibility.

2.Misjudging the size of the lesion may result an incision crossing the lesion or the surgical defect causing dehiscence.

3.Clefting can occur if the incision is made

too close to the gingival margin.

4.Incision crosses bony eminences where

the tissues are thin ; scar is more prominent.

slide30

5. No reference points in the flap; replacing is difficult & may result stretching on one edge & puckering on the other on suturing.

  • 6. Part of the incision is in the alveolar mucosa

which is vascular (may cause bleeding during surgery) & highly mobile (soreness & delayed healing are not uncommon).

slide39

3. Triangular flap:

A horizontal gingival incision made in the gingival sulcus joined by a relaxing vertical incision.

slide41

Advantages:

  • 1.The possibility of the incision’s crossing the lesion is eliminated.
  • 2. periodontal curettage and alveoloplasty can be done when necessary.
  • 3.It provides good access to lateral root repairs.
  • 4.A good design for treatment of short roots.
  • 5.The flap is easy to reposition.
  • 6.The blood supply to the flap is at maximum.
slide42

Disadvantages:

  • 1.Difficult to retract.
  • 2.Pocketing may result duo to stripping of the gingival fibers.
  • 3.Long incisions are needed to gain access to the apices of the long roots.
  • 4.Shorter flaps suffer more tension on the edges during retraction.
  • 5.In long roots, extension of the vertical incision into the mucobuccal or mucolabial fold will soreness & delayed healing.
slide43

6.Gingival contour around existing crowns may change resulting in poor esthetic result.

  • 7.Oral hygiene is difficult.
  • 8. Interdental suturing is more difficult.
slide44

4. Pyramidal flap:

A horizontal gingival incision joining two vertical relaxing incisions.

slide48

Advantages:

1.Excellent access & visibility.

2.No tension on the released flap.

3.It has good reference points for repositioning.

4.Access for root repair is increased.

5.periodontal curettage or alveoloplasty can be done simultaneously if needed .

6.Multiple tooth treatment can be done.

slide49

Disadvantages:

1. Elevation is difficult to initiate.

2. Diminished blood supply to the flap.

3. Stripping of the gingival fibers may lead to clefting and/or poor esthetic results if the teeth involved in the flap were crowned.

4.Interdental sutures are needed which is more difficult.

5.Oral hygiene is difficult to maintain.

6.Extension of the vertical incisions into the alveolar mucosa causes soreness & delayed healing.

slide50

5. Gingival (envelope) flap:

A horizontal incision in the gingival sulcus involving many teeth.

slide51

Advantages:

  • 1.Gingivictomy can be done in the same visit.
  • 2.Good reference points protect from lateral displacement of the flap.
  • 3.Gingival levels can be changed in either directions.
slide52

Disadvantages:

  • 1.Flap is difficult to reflect.
  • 2.Tension on the flap is excessive.
  • 3.No relaxing incisions may lead to tearing of the flap at the ends of the incision.
  • 4.Cannot reach the apex of long roots.
  • 5.The deeper the area of surgery, the longer should be the flap to have access & visibility.
  • 6.Oral hygiene is difficult to maintain.
slide53

SURGICAL TECHNIQUE

1.INCISION

2.ELEVATION

3.RETRACTION

4.BONE REMOVAL

5.SURGICAL TASK

6.WOUND DEBRIDEMENT

7.WOUND CLOSURE

slide54

1. INCISION:

  • Rule no.1:

The incision must be done with a firm, continuous stroke.

the armamentarium for basic oral surgical trays
Basic trays

Examination tray

Exodontia tray

Postoperative tray

Special trays

Biopsy

Apicoectomy

Implant

The Armamentarium For Basic oral Surgical Trays
slide56
Most surgical procedures begin with

AN INCISION

  • The Scalpel is the instrument for making INCISIONS.

It is composed of a handle & a blade