3. INTRODUCTION
Malignancies of maxillofacial region are most common etiology for the acquired defects
of that region. Oral squamous cell carcinoma is the most common cancer in India, and
its prevalence ranges around 45% of all cancers. Unfortunately, most of these lesions
are diagnosed at a late stage and requires surgical resection along with adjacent
anatomical structures such as mandible, floor of the mouth. tongue, etc.Lose of
mandibular continuity results in cosmetic, functional and psychological discomfort for
the patient. If condylectomy has been performed the prime most difficulty encountered
is deviation of mandible towards the defect side, and inferiorly.
4. DEFINITION
Maxillofacial prosthesis is the art and science of anatomic, functional
or cosmetic reconstruction by means of nonliving substitutes in the
regions of maxilla, mandible and face that are missing or defective
because of surgical intervention, trauma, pathology or congenital
malformation
6. CANTOR AND CURTIS CLASSIFICATION OF
MANDIBULAR DEFECTS
Class I: Mandibular resection
involving alveolar resection and
preservation of mandibular
continuity
9. Class IV: Resection of lateral portion of
the mandible with subsequent
augmentation to restore form and
function.
10. Class V: Midline resection with
subsequent augmentation to restore
form and function.
11. Class VI: Similar to class V but
there is no augmentation
following resection
12. BASED ON THE AMOUNT OF RESECTION OR
BONE LOSS
ā¢The superior portion of mandible is
resected and lower border is left intact.
Continuity
defects
ā¢Entire segment of of mandible is
resected .
ā¢
Discontinuity
defects
13. FACTORS AFFECTING TREATMENT OF
MANDIBULECTOMY PATIENT
ā¢ Location & extent of mandibular defects
ā¢ Presence of remaining natural teeth / pre existing implants.
ā¢ Degree of post mandibulectomy rotation and deviation .
ā¢ Available mouth opening .
ā¢ Functional limitations of tongue .
ā¢ Compromise of vestibular extentions.
ā¢ Skin grafting .
ā¢ Radiation theraphy
14. PROSTHETIC REHABILITATION
ā¢ All basic principles of complete denture construction must be considered and
modified because of the unusual anatomic and functional situation.
16. PROSTHETIC REHABILITATION OF
COMPLETELY EDENTULOUS MANDIBULAR
DEFECTS
ā¢ To improve the prognosis the following procedures can be followed:
ā¢ ā¢Vestibuloplasty to create vestibule.
ā¢ Mandibular guidance flange to guide the mandibular movements
ā¢ Lip bumpers are given to support the lower lip.
ā¢ Neutrocentric occlusion with nonanatomic teeth to distribute the occlusal forces.
17. PROCEDURE IN COMPLETE DENTURE
Primary
impression
Border
moulding &
secondary
impression
Fabrication
of base
Jaw relation
Teeth
selection and
arrangement
25. Magnet retained snap on prosthesis
Bar supported over denture
Implant supported overdenture
26. CONCLUSION
Surgical and prosthodontic rehabilitation of the mandibulectomy patient can provide
satisfactory results, improving the oral functions of the patient which overall makes a
positive impact on the quality of life for the patient. However proper treatment
planning pre and post surgery is necessary to obtain the most optimal results