Complications of Dentoalveolar Surgery David L. Basi DMD, PhD ORAL and MAXILLOFACIAL SURGERY UNIVERSITY of MINNESOTA Overview • Prevention • Patient management • Soft tissue injuries • Hard tissue injuries • Post-operative complications Prevention • Planning • Know your limitations • Know your patient/procedure – medical status – radiographs Injuries during surgery Soft Tissue Injuries • Flap tears/necrosis • Instrument slips/tears • Lip burns/abrasions
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• Flap Design– Access for bone removal– Access for sectioning– Periodontal health– Avoid injury to vital structure
Flap Design
• Incisions– Sharp blade of proper size and shape– Firm, continuous stroke– Avoid vital structures– Blade perpendicular to skin or mucosa– Placement/margin control
Flap Design
• Apex never wider than base• Parallel or convergent sides• Length of flap should be less than twice
the base axial blood supply in base• Base of flap should not be twisted or
stretched
Proper flap design
Torn Flap
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Displaced or retained roots
Retained Root
• Rule: Uninfected root tips (< 2-3mm) left within the bone have minimal complications vs. destructive surgical removal
Tooth/Fragment in Sinus
• Careful inspection• Radiographs• Remove promptly if possible
Tooth/Fragment in Sinus
• Surgical approaches– through the socket- not recommended– buccal, superior to the socket– Caldwell-Luc
• Consider buccal flap if > 5 mm opening
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Management of Displaced Teeth and Tooth Fragments
Maxillary sinus:• Obtain a periapical or panorex radiograph to
determine position.
• Root tips should be removed.
Management of Displaced Teeth and Tooth Fragments
Maxillary sinus continued:• Attempts can be made to retrieve smaller root tips by
placing the patient supine, irrigating the sinus, and suctioning with a flexible suction catheter.
• A regimen of antibiotics, antihistamine, and nasal spray should be given.
• For removal of roots with pathology or larger roots, the Caldwell-Luc approach should be used.
Management of Displaced Teeth and Tooth Fragments
If a root tip is left, the patient should be informed of the circumstances. Radiographs should be taken and document in the patient’s chart. Follow-up radiographs should be taken at 6 and 12 months.
Remember….management of Displaced
Teeth and Tooth Fragments
Criteria for root tips that need removal include roots that have apical lesions on radiographs or those with visible pathology or infection.
Also..roots that are mobile…
Root tips in sinus need to be removed.
Oral - Antral Communications
Oral Antral Communications
• Small perforations (2-4mm) at the apex of the socket will usually heal
• Nasal precautions should be reviewed with the patient.
• Smoking affects the healing process and increases the likelihood of an oral antral fistula forming.
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Oral Antral Communications
• For moderate size perforations (more than 5mm), primary closure should be obtained, the easiest and most reliable time to perform a closure of an oral antral communication is at the time it occurs.
• Nasal precautions should be reviewed with the patient, systemic and topical nasal decongestants and antibiotics should be prescribed.
Oral Antral Communications
• If there is not sufficient tissue, buccal bone may need to be removed, or if the opening is large, a buccal flap may be necessary to produce a water tight closure.
• Consider using a nonresorbable suture • In patients with no evidence of sinus disease,
the antibiotic of choice is amoxicillin. If sinus disease is present, the antibiotic of choice is Augmentin.
Sinus Floor
Sinus Membrane
Primary Closure
Sinus Precautions!
Care of the Mouth Following A-O Communication
• Sinus precautions include:– No nose blowing, straw sucking, smoking– Nasal decongestants, antibiotics
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Prevention
Plan surgery:Simple vs surgical extraction
Evaluate Sinus
Make a surgical plan:Simple extraction
Look at the Radiograph! Sinus floor
Increased risk for sinus exposu
Have a surgical plan
•Simple vs surgical•Section tooth •Flap design
Surgical Technique
• Flap Design• Removal of Bone• Sectioning of Tooth• Elevation and Delivery• Wound Management
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Surgical Technique
• Sectioning of tooth– Avoid excessive forces to bone and
adjacent teeth– Reduce bulk of crown– Split roots– Purchase points
Hard Tissue Injuries
• Buccal bone fracture• Tuberosity fracture• Consider surgical extraction• Management depends on periosteal
attachment
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Fractures
Tuberosity fractures:• If fracture of the tuberosity
occurs and the tooth is asymptomatic and without pathology, the extraction should be deferred, and the tuberosity should be immobilized with an arch bar for 6 weeks prior to attempting removal.
• If the tuberosity is only slightly loose, discontinuation of the procedure may be the only treatment necessary.
Maxillary Tuberocity Fractures
Mandible fractures:• Mandibular fractures are a recognized
complication of third molar surgery and should be listed on routine consent forms.
• Predisposing conditions are: Mandibular atrophy, osteoporosis, increased age and pathology such as cysts, growths or tumor.
Intra-operative bleeding
Bleeding
• History/family history• Medications
– ASA– NSAIDS– Coumadin
• Hypertension
Bleeding: Intraoral Factors
• Vascular• Often open wound• Loss of clot
Bone Wax:(Salicylic acid and Beeswax)
Mechanism of action:Mechanical blockage of small bone cannels
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Bleeding: Management
• Pressure/patience• Injection• Bleeding vessel• Local anesthetic• Hemostatic agent
Bleeding: Prevention
• Atraumatic technique• Curettage of granulation tissue
Hemostatic AgentsGauze
And……
Pressure, Pressure and more….
Pressure
Gelatin
Mechanism of Action:Helps stabilize clot formation
(Does not activate coagulation cascade or platelets
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SutureMicrofibrillar Collagen
Mechanism of Action:Activates platelet aggregation
Collagen
Mechanism of Action:Activates platelet aggregation
Oxidized Regenerated Cellulose
Mechanism of Action:Helps stabilize clot formation
(Does not activate coagulation cascade or platelets
Bleeding: Hemostatic Agent
• Topical thrombin– Stimulates fibrin formation– Cannot use with surgicel (deactivates)
• If contacted by a patient experiencing prolonged bleeding, review the patient’s medical history and medications. Give the patient explicit instructions to bite down on a gauze with continuous pressure for 45-60 minutes. If the patient complains of brisk bleeding, they should be evaluated in the emergency room or office immediately.
• If simple measures do not control the bleeding, surgical intervention is indicated.
Management of Postoperative Bleeding
• Inspect the surgical site. Good lighting and suction are essential.
• If the use of local anesthetic is required, utilize one that does not contain a vasoconstrictor (this may give you temporary control, but may hinder your ability to determine the source of bleeding).
Management of Postoperative Bleeding
• If sutures are present, they should be removed so the surgical site can be evaluated adequately.
• Determine if the bleeding is coming from hard or soft tissues. Soft tissue bleeding can often be controlled with direct pressure; if the source of bleeding is granulation tissue, it should be curetted.
Management of Postoperative Bleeding
• Bleeding from bone: If the bleeding is from a pinpoint area, the bone can be burnished. If the bleeding is more diffuse, a hemostatic adjunct should be packed into the socket and direct pressure applied.If during a dental extraction massive hemorrhage occurs, such as a central venous lesion, the tooth should be placed back into the socket as an initial means of hemorrhage control.
AO communication…continuedFistula Formation
• Causes– most common iatrogenic
• Incidence– 1/180- first molar– 1/280- second molar
• Fistula < 5 mm may close spontaneously
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Cycle of Sinusitis
• Mucosal edema• Stasis• Inflammation and
Hyperplasia
Mucociliary Clearance
• Presence of preordained pathways to the ostia• Coordinated beating of cilia• Bypasses windows in the maxillary walls• Scar can form a barrier
Fistula Closure• Two layered closure when possible• Buccal flap• Palatal flap
– posteriorly based– anteriorly based
• Combination flaps• Alloplastic materials
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Oral-Antral Fistulas: Conclusions
• If oroantral fistulas are small they may heal spontaneously
• For persistent fistulas- control sinusitis, establish physiologic drainage