|Year : 2018 | Volume
| Issue : 2 | Page : 118-120
Prosthetic management of a hemi-Mandibulectomy patient
Shweta Choudhary1, Supratim Ram2, Ajit Kumar3
1 Department of Prosthodontics, PDM Dental College and Research Institute, Bahadurgarh, Haryana, India
2 Department of Dentistry, ESIPGIMSR and ESIC Medical College and Hospital, Kolkata, West Bengal, India
3 Department of Orthodontics and Dentofacial Orthopaedics, PDM Dental College and Research Institute, Bahadurgarh, Haryana, India
|Date of Web Publication||8-Jun-2018|
H. No. 429, Ground Floor, Omaxe City, Rohtak, Haryana
Source of Support: None, Conflict of Interest: None
This case report describes the prosthodontic management of a patient that has undergone hemimandibulectomy with a provisional training appliance followed by definitive flange prosthesis. The prosthodontic rehabilitation of a patient with acquired mandibular defects is important as the balance and symmetry of mandibular function is lost. There is an altered mandibular movement and deviation of the residual fragment toward the defective side. Besides, there is difficulty in swallowing and impaired speech. A corrective device named “Guide Flange Prosthesis” is indicated to limit that clinical manifestation. A 32-year-old female patient with segmental resection of the left mandible without reconstruction (Class III) reported our department. She had deviated mouth opening and disturbed profile with facial asymmetry. A training appliance with a palatal ramp followed by a definitive mandibular cast partial denture with a guiding flange-in was planned for this patient.
Keywords: Guiding flange prosthesis, mandibular resection, maxillofacial prosthesis, palatal ramp, segmental mandibulectomy, training appliance
|How to cite this article:|
Choudhary S, Ram S, Kumar A. Prosthetic management of a hemi-Mandibulectomy patient. Indian J Dent Sci 2018;10:118-20
|How to cite this URL:|
Choudhary S, Ram S, Kumar A. Prosthetic management of a hemi-Mandibulectomy patient. Indian J Dent Sci [serial online] 2018 [cited 2019 Jan 17];10:118-20. Available from: http://www.ijds.in/text.asp?2018/10/2/118/233973
| Introduction|| |
Mandible is the most common site for intraoral tumors which often requires the resection of large portions of the mandible. If mandibular continuity is not restored during surgical closure of wound, the remaining mandibular segment will retrude and deviate toward the surgical side at the vertical dimension of rest. When the mouth is opened, the deviation increases, leading to an angular pathway of opening and closing. Other disabilities resulting from such resections include impaired speech, difficulty in swallowing, and severe cosmetic disfigurement. The mandibular deviation is mainly due to uncompensated influence of contralateral musculature, particularly the internal pterygoid muscle and pull from the contraction of cicatricial tissue on the resected side.
Cantor and Curtis have classified the mandibular defects into six categories. Several modalities to return the mandible to the optimum maxilla–mandibular relationship have been described. These include intermaxillary fixation, vacuum-formed polyvinyl chloride splints, mandibular guidance prostheses, and a widened maxillary occlusal table using a double row of teeth. Swoope  proposed the use of a palatal ramp and Rosenthal suggested the use of two rows of maxillary posterior teeth on unresected side. Mathew A and Thomas S delivered a guiding flange prosthesis (GFP) to a hemi-mandibulectomy patient. Out of the various prosthetic treatments, the appropriate option should be selected depending on the clinical situation. Robinson et al. in 1964 stated that fabrication of a provisional GFPs facilitates the fabrication of a definitive restoration. GFP is a mandibular conventional prosthesis designed for the patient who is able to achieve an appropriate mediolateral position of the mandible but is unable to repeat this position consistently for adequate mastication.
This case report describes the prosthodontic management of a patient who has undergone a hemimandibulectomy with Class II defect. A palatal ramp training appliance was fabricated followed by definitive prosthesis as cast partial denture with a mandibular guiding flange.
| Case Report|| |
A 32-year-old female patient reported to our department with deviated mandible for functional and esthetic recovery. The patient gave a history of a large swelling on the left side for 2 years which was later diagnosed as cemento-ossifying fibroma. This was followed by a surgical procedure which involved segmental resection of the left mandible without reconstruction. The defect was Class II according to Cantor and Curtis classification. On extraoral examination, there was severe deviation of the mandible toward left side [Figure 1]a and [Figure 1]b. There was deviated mouth opening and disturbed profile with facial asymmetry [Figure 1]c. Mouth opening was found to be reduced to 25 mm, and mandibular deviation of 18–20 mm toward left side was found on opening of jaw. Intraoral findings included missing lower left premolars and molars with mandibular second molar missing on the right side [Figure 2]a and [Figure 2]b. There was no occlusal contact accompanied with trismus and excessive salivation with drooling.
|Figure 1: (a) Frontal view of patient – preoperative; (b) frontal view of patient – deviated mouth opening; (c) frontal view of patient – smile|
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|Figure 2: (a) Intraoral mandibular arch; (b) intraoral – deviated occlusion; (c) cameo surface of the training appliance outside the mouth; (d) labial view of the training appliance inside the mouth|
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A training appliance with a palatal ramp followed by a definitive mandibular cast partial denture with a guiding flange-in was planned for this patient.
Upper and lower alginate impressions (Dentalgin; Prime dental products, Mumbai, Maharashtra, India) were made and poured (Kalstone; Kalabhai Karson, Mumbai, Maharashtra, India). A training appliance retained with four circumferential clasps with 21-gauge orthodontic wire (KC Smith and Co., Monmouth, UK) on maxillary first premolars and second molars was constructed with autopolymerizing acrylic resin (DPI self-cure Dental products of India, Mumbai, Maharashtra, India) [Figure 2]c. A palatal ramp on the right (unaffected) side was constructed chair side to guide the mandible into occlusion [Figure 2]d. For the definitive prosthesis, the mandibular diagnostic cast was surveyed and designed for cast partial denture. Mouth preparation was done. Final impression was made with monophase addition silicone (Aquasil Ultra Monophase, Dentsply) in acrylic custom tray. The master cast was poured in die stone (Type IV) (Kalrock, Kalabhai Karson, Mumbai, Maharashtra, India). Block out of the master cast was done with blocking wax. Wax pattern was fabricated with LIWA system [Figure 3]a. Metal framework was obtained after casting [Figure 3]b, and metal try-in was done in the patient's mouth. Jaw relations were recorded followed by teeth arrangement and try-in. A guiding flange was fabricated with modeling wax (Modeling wax; Deepti Dental Products, Ratnagiri, India), leaving 2–3 mm space from maxillary teeth simultaneously not affecting esthetics and function.[Figure 3]c The complete assembly was cured (DPI Heat cure, Dental products of India, Mumbai, Maharashtra, India). Final prosthesis was delivered [Figure 4]a. The patient was trained to use the prosthesis, and postinsertion instructions were given. The patient was followed up at a regular interval of 2 months for the next 1 year. Marked improvement was noted in the esthetics of the patient extraorally, and occlusal contacts were also maintained that improved the function of the patient [Figure 4]b.
|Figure 3: (a) LIWA pattern on master cast. (b) metal framework on the mandibular cast. (c) try-in in patient's mouth with wax flange|
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|Figure 4: (a) Labial view of the prosthesis inside the mouth. (b) frontal view of the patient with the prosthesis – smile|
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| Discussion|| |
The basic rehabilitation objective in this case was to re-educate mandibular muscles to re-establish an acceptable occlusal relationship (physio-therapeutic function) for residual mandible and to restore the mastication. The mandibular guidance therapy should be initiated at an early stage for more successful definitive occlusal relationship. Any delays in the initiation of mandibular guidance appliance therapy, due to reasons such as extensive tissue loss, radiation therapy, radical neck dissection, flap necrosis, and other postsurgical morbidities may result in an inability to achieve normal maxilla–mandibular relationship. An implant-supported prosthesis could not be considered since no bone graft was used. Palatal guiding appliance serves as a training appliance till a cast partial denture can be fabricated for the patient. If the patient closes the jaws in proper occlusion, the appliance can often be discontinued and changed with a definite denture. The guiding flange which rides on the buccal surfaces of several of the maxillary teeth is the mechanical system which prevents the mandible from turning toward the resected side. In this way, the cast partial denture with guiding flange maintained the mandible in its position and also aided in chewing by holding the occlusal contacts. LIWA system, used for fabrication of pattern for partial denture framework, is a light-polymerizing pattern wax. It has low contraction value and eases the pattern fabrication on the master cast.
| Conclusion|| |
In patients who have undergone mandibular resection, correct intercuspal position can be accomplished with the early use of training appliance to guide the mandibular position followed by definitive prosthesis with guiding flange. The cast partial denture with guiding flange maintains the mandible in its position and also aids in chewing by holding the occlusal contacts.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4]