Full Mouth Rehabilitation of a Post COVID-19 Mucormycosis Treated Patient using Bar- Retained Prosthesis: A Case Report
Correspondence Address :
Archit Kapadia,
Postgraduate Student, Department of Prosthodontics, Government Dental College and Hospital, Medical Chowk, Nagpur-440009, Maharashtra, India.
E-mail: kapadiaarchit58@gmail.com
During the second wave of Coronavirus Disease-2019 (COVID-19), the Indian subcontinent witnessed a steep rise in post-COVID mucormycosis cases, with an alarming rate of about 70 times higher than the rest of the world. Maxillofacial defects amounted to various post-surgical hindrances such as difficulty in mastication, impaired speech, nasal regurgitation, mental despair and socially awkward situations. Dentists worldwide faced the challenge of fabricating a well-retained and functionally comfortable prosthesis to improve the condition of physiologically debilitating and psychologically impaired patient. In this case report, the authors present the full mouth rehabilitation of a 65-year-old male patient who had been treated for post-COVID mucormycosis. A bar-retained prosthesis was delivered, which was non-invasive, highly retentive, and pocket-friendly for the patient. This case report also shows that through meticulous planning and execution of the treatment plan, one can achieve the desired results and meet the patient’s expectations.
Aesthetic correction, Andrew’s bridge, Coronavirus disease-2019, Definitive obturator, Hader bar clips, Psychological health, Speech improvement
A 65-year-old male patient reported to the Department of Prosthodontics with a chief complaint of impaired facial appearance with difficulty in chewing food and altered speech after the surgical excision of the infected area both in the maxillary and mandibular arch. The patient gave a medical history of being COVID-19 positive ten months back for which he was under intensive care. Three months after testing positive, he underwent surgical debridement of rhinocerebral mucormycosis involving a part of maxilla and mandible following which he was given a delayed surgical obturator which he used for six months.
Extraorally, there was loss of lip support because of the surgical debridement of anterior part of maxilla (Table/Fig 1). Intraoral clinical examination revealed that there was a either well healed maxillary arch defect which was classified as Aramany’s Class-IV (1) and a completely well healed mandibular defect which was classified as Cantor and Curtis class V (Table/Fig 2) (2). Teeth present in the maxillary arch according to Fédération Dentaire Internationale (FDI) system were 26 and 28 and in the mandibular arch were 34, 35, 36, 37, 38, 48 and a bridge connecting 45 and 47. The patient was not willing to undergo an implant-retained fixed prosthesis and hence a bar-retained removable prosthesis was planned for both the arches. The retention was obtained from the bar and undercuts of the defect.
Some of the technical difficulties faced included achieving retention for the maxillary prosthesis due to only two periodontally sound teeth being present, achieving a harmonious occlusal plane, restoring the excessive vertical restorative space with a shallow vestibule in the mandibular arch, achieving an ideal path of insertion for easy insertion and removal of the prosthesis, improving aesthetics, and maintaining oral hygiene.
To begin with, primary impressions were made using irreversible hydrocolloid (Vignette chromatic; Dentsply) and primary casts were poured using Type-III dental stone (Kalstone; Kalabhai) (Table/Fig 3). Facebow record was made and mounted indirectly on a Hanau wide view semi-adjustable articulator. To check for the aesthetics and phonetics, anterior teeth arrangement was done. This was also helpful for the determination of canine position which was required for establishing a proper plane following the curve of spee (Table/Fig 4). Mandibular posteriors were ink-stained and a modified customised occlusal plane analyser was used to grind the cast occlusally till both the canine tips and the distobuccal cusps of the first molars contacted the plane analyser simultaneously. This helped to determine which tooth needed enameloplasty and which tooth required a crown (Table/Fig 5). A putty index was used to transfer the corrected occlusal plane intraorally. The occlusal interferences were removed and tooth preparation was done. A two-stage putty light body impression (Zhermack Elite HD+) was made and master cast was poured in Type-IV die stone (Ultrastone; Kalabhai). Wax pattern followed by casting of the Andrew’s bridge with Hader bar and preci- horix attachment (Ceka Preci-Horix) was done. The bar was kept 2 mm away from the ridge to maintain proper hygiene (Table/Fig 6). Metal framework was tried in the patient’s mouth to check for proper marginal fit, occlusal plane and arch form. This was followed by bisque trial along with the clip attachment incorporated in the denture (Table/Fig 7).
Before the final fabrication of lower denture was carried out, the two periodontally sound maxillary teeth were prepared and a definitive impression of teeth along with the defect was recorded using customised single tray technique (Table/Fig 8). The master cast was poured and jaw relation was recorded which was then indirectly mounted on the semi-adjustable articulator (Table/Fig 9). Maxillary teeth arrangement along with the wax pattern trial with bar and preci-horix attachment was done intraorally. The bar attachment was then casted and in the final teeth arrangement, a tooth was added over the bar attachment (Table/Fig 10). The final try-in along with the casted bar attachment was done to check for occlusion, lip support and aesthetics (Table/Fig 11).
Acrylisation of the mandibular and maxillary denture was done using compression moulding technique. Hollowing of the maxillary denture was done using the lost salt technique and an aluminium mesh was adapted over the master cast to reinforce the denture (Table/Fig 12). The final prosthesis was delivered by following a certain protocol of cementing the bar attachment followed by clipping of the polished dentures upon them [Table/Fig-13,14]. This case was followed-up for six months to check for the wear of any attachments, fracture in the prosthesis and the oral hygiene maintenance by the patient. The patient was able to insert and remove the prosthesis easily and above all was able to maintain oral hygiene. There were no issues with the attachments and the prosthesis was nicely retained in the oral cavity. There was no problem in mastication, there was a drastic change in his speech, no fluid leaking into the nasal cavity and was more than satisfied with the final aesthetics as well (Table/Fig 15).
There was a steep rise in patients infected by the opportunistic fungal infection of mucormycosis in the second wave of COVID-19 which had imposed an immense physiological and psychosocial burden on the patients affected by it (3),(4). The in-ordinate use of corticosteroids to suppress the cytokine storm had paved way for opportunistic infections like mucormycosis across India (5). The surgical resection of such extensive infection led to the formation of a multitude of acquired maxillofacial defects which posed a number of challenges for the clinicians to rehabilitate the same.
In central India, the most common extent of the defect site was Aramany’s class 1 (46%) in the maxillary arch with only 24% of the cases having Class-IV defect whereas the mandibular arch was rarely infected (6). Use of implants for support or retention of the prosthesis is one of the most promising options for rehabilitating such patients. Nonetheless, the financial burden on the patients with mucormycosis was massive in India wherein not all could afford such treatment options and not everyone had a positive mindset of undergoing a second surgery (7).
This case report describes one such case wherein a full mouth rehabilitation of a patient who was surgically treated for post-COVID mucormycosis both in the maxillary and mandibular arch was done following which he was prosthetically rehabilitated using a bar-retained prosthesis.
In patients who have undergone resective surgeries for post-COVID- 19 mucormycosis, an early and appropriate prosthetic rehabilitative effort is essential for the physical, social and psychological well-being. Hypernasal speech, fluid leakage into the nasal cavity, impaired masticatory function and varying degrees of cosmetic deformities are the post-surgical defects these patients are predisposed to (8). The prescribed prosthetic rehabilitative options usually range from heat-cure acrylic surgical obturators to implant-supported definitive obturators. The final prosthesis depends upon the extent of defect, healing phase, patient’s choice and economic conditions (9).
Use of a hader bar with preci-horix attachment improved the retention of maxillary and mandibular prosthesis. Use of a self-grinding occlusal plane template to modify the uneven mandibular occlusal plane before providing the definitive restorations was useful to achieve the harmonious occlusal plane (10). The occlusal surface was kept in metal since it was opposed by acrylic teeth and hence this reduced the wear of the acrylic teeth. The bar was kept 2 mm above the vestibule for easy cleaning and maintaining the oral hygiene. The maxillary prosthesis was reinforced with aluminium mesh to prevent fracture of the prosthesis. The defect area recorded was made hollow by using the lost salt technique which made the prosthesis light in weight (11). The normal contour of patient’s upper lip that was compromised due to maxillectomy was restored by adding adequate permissible bulk to anterior region of the maxillary prosthesis that acted as a lip plumper (12).
Novel methods to rehabilitate post-COVID mucormycosis surgically treated patients using Patient Specific Implants (PSI) also represent a valid alternative for the same (13). But not all patients are willing for a second surgery and not all patients can afford them. The patient in the current case report was not willing for a surgical re-entry and hence the described method being non-invasive, unlike in cases of implant-supported prosthesis, cost-effectiveness had a positive psychological effect on the patient’s mind. Nevertheless, the attachments need to be changed in the future due to wear as the prosthesis is inserted and removed daily.
This case report describes the rehabilitation of post COVID-19 mucormycosis affected maxillary and mandibular arches wherein the affected parts were surgically excised. The patient had been explained about all the possible prosthetic rehabilitation options from an implant-supported fixed prosthesis to a removable heat cure prosthesis retained by clasps. The patient was not ready for a surgical re-entry and hence, keeping in mind the patient’s choice of treatment of being non-invasive and at the same time being economical, the following prosthetic treatment was planned. The patient was satisfied with the aesthetics and the phonetics also improved drastically. Therefore, implant is not the only available option for rehabilitating such cases. With proper planning, a wellfitted and a physiologically comfortable prosthesis can be fabricated.
DOI: 10.7860/JCDR/2023/64110.18011
Date of Submission: Mar 17, 2023
Date of Peer Review: Apr 22, 2023
Date of Acceptance: May 02, 2023
Date of Publishing: Jun 01, 2023
AUTHOR DECLARATION:
• Financial or Other Competing Interests: None
• Was informed consent obtained from the subjects involved in the study? Yes
• For any images presented appropriate consent has been obtained from the subjects. Yes
PLAGIARISM CHECKING METHODS:
• Plagiarism X-checker: Mar 28, 2023
• Manual Googling: Apr 26, 2023
• iThenticate Software: May 01, 2023 (5%)
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