reconstruction of maxillectomy and midfacial defects of maxillectomy and midfacial defects justin h....
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Reconstruction of Maxillectomy and Midfacial Defects
Justin H. Turner M.D., Ph.D.
April 9, 2010
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Maxillectomy and Midfacial Defects
• Due to resection of tumors involving orbit, nasal cavity, palate, paranasal sinuses, intraoral mucosa
• Cause major functional consequences
– Deglutition
– Speech
– Orbital function
– Aesthetics
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Maxillectomy – A Historical Perspective
• Total maxillectomiesperformed by Dupuytrenand Gensoul in 1820 and 1824?
• First recorded maxillectomy by Liston in 1841
• Extensive review published by Ohngren in 1933
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Grover Cleveland on the yacht ‘Oneida’ prior to maxillectomy (1898)
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• Two horizontal and three vertical buttresses
• Insertion for most muscles of facial expression and mastication
• Geometrical structure with 6 walls (hexahedron)
• Roof supports orbital contents
• Floor forms anterior hard palate.
Maxillary Bone
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Classification System (Santamaria & Cordeiro)
• Type I (Limited maxillectomy)– One or two walls, preservation of palate
• Type II (Subtotal maxillectomy)– Lower 5 walls, preservation of orbital floor
• Type III (Total maxillectomy)– Resection of all six walls
– Orbital preservation (IIIa) vs exoneration (IIIb)
• Type IV (Orbitomaxillectomy)– Upper 5 walls, preservation of palate
Santamaria & Cordeiro, 2000. Plast Recon Surg
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Maxillary Defects
Santamaria & Cordeiro, 2000. Plast Recon Surg
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Okay et al. 2001
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Brown et al. 2000
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Approach to Reconstruction
• Extent of resection
– Volume vs. surface area requirements
• Assessment of critical structures
– Palate, oral commisure, nasal airway, eyelids
• Need for bone replacement
– Orbital floor
– Anterior arch of maxilla
• Need for soft tissue bulk or resurfacing
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Reconstruction of Maxilla – The Past
• Skin grafts
• Cervicofacial flaps
• Pectoralis myocutaneous flap
– Usually requires two stage procedure
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Prosthetics (Obturation)
• Advantages– Shorter operative time
– Shorter postop hospital stay
– Better visualization of maxillectomy cavity for surveilance
• Disadvantages– Hypernasal speech
– Regurgitation of foods and liquids into nasal cavity
– Difficulty maintaining hygeine
– Need for repeated adjustments
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Obturators
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Courtesty of Dr Ghassan Sinada
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Local and Regional Flaps
• Palatal mucoperichondrial island flap– Up to 15 cm2 surface area– Strong enough for through-and-through defects– Can rotate 180 deg on pedicle
• Buccal fat pad– Rich vascular supply– Best for defects up to 4 cm in diameter– Can be used in combination with free bone grafts
• Submental island– 7-15 cm in size– Well hidden donor site scar
• Temporalis– Good for orbital support
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Free Flaps
• Indicated for large defects
• Matching to three-dimensional shape of defect
– Provide bone, palatal and nasal lining, skin, soft tissue
• Requires vascular pedicle 10-15 cm long
• Multiple different options
– Myocutaneous
– Osteomyocutaneous
– Combination with free bone grafts
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Free Flaps
• Advantages
– Allows for dental restoration (osseointegrated implants)
– Freedom to orient, shape and inset flap as needed
• Disadvantages
– Longer surgical and recovery times
– Increased potential for complications
– Delay in diagnosis of local recurrence
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Radial Forearm
• Large surface area with minimal soft tissue
• Vascularized bone segment up to 12 cm
• Good for skin and internal lining.
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Rectus Abdominus
• Large skin surface area and large volume of soft tissue
• Can be divided into 2-3 flaps
• Up to 18-20 cm pedicle length
• Best for Type III and IV defects
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Fibula
• Easy to harvest
• Excellent bone stock
• Long vascular pedicle
• Minimal donor site mobility
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Other Options
• Illiac crest– Excellent bone source
– Short pedicle length
• Scapula– Soft tissue can be rotated freely around bone
– May require secondary bone grafting
• Anterolateral thigh– Shorter pedicle
– May be overly bulky
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Functional Outcomes: Obturator vs. Free Flap
• 113 Patients
– 73 obturator
– 40 free flap
• Comparable postoperative speech and diet except for large defects
• Function improved with free flap for large defects
• No change in time to recurrence
Moreno et al. 2009. Head and Neck.
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Take-home Points
• Maxillectomy and midface defects result in major functional and aesthetic abnormalities
• Reconstruction depends on the size and individual components of the resected tissue
• Large defects often require the use of free tissue transfer
• Obturation can result in good functional results, but requires constant patient care
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References
1. Cordeiro PG and Disa J. Seminars in Surgical Oncology 19: 218-225 (2000)
2. Santamaria E and Cordeiro PG. Journal of Surgical Oncology 94: 522-531 (2006)
3. Futran ND. J Oral Maxillofac Surg 63: 1765-1769 (2005)
4. Cordeiro PG and Santamaria E. Plast Reconst Surg 105: 2331 (2000)
5. Okay et al. J Prosth Dentistry 86: 352-365 (2001)
6. Brown JS et al. Head Neck 22: 17-26 (2000)