We report two cases of ocular prosthesis fabrication that make use of a transparent graph grid for positioning the iris disk. The custom-made ocular prostheses achieved intimate contact with the tissue bed enabling ideal fit. As asymmetry may result in a squint-eyed appearance, proper positioning of the iris disk in the scleral wax pattern is vital to fabricating the custom-made artificial eye. The position of the iris disk in the custom-made ocular prosthesis was in symmetry with that of the natural eye, restoring esthetics of the patient.
The purpose of this study was to evaluate the water sorption and tear strength of two commercially available silicone elastomers. Silicone test specimens with the dimension of 150 mm × 150 mm × 3 mm were prepared for cosmesil M511 silicone (Cosmedica Ltd, Cardiff, UK) and biomed silicone (MP Sai Enterprises, Mumbai, India). Sixty test specimens were divided equally into two groups-I and II. Group I and II were further subdivided into A, B, and C with 10 specimens each. Subgroup A represented the control group (without colorant), test specimens in subgroup B (incorporated with intrinsic pigments) were evaluated for tear strength, and subgroup C specimens, incorporated with intrinsic pigments were evaluated for water sorption. Students's t test was performed. Among the control group, cosmesil M511 silicone showed more tear strength with the mean of 11.42 ± 0.73 compared to biomed silicone which showed 6.64 ± 0.70. The tear strength values increased for both silicones after intrinsic pigmentation. Cosmesil M511 silicone showed more water sorption compared to biomed silicone. Medical grade cosmesil M511 silicone had better tear strength values compared to biomed silicone.
The present findings suggest that incorporation of nano-oxides improved the color stability of Cosmesil M511 silicone elastomer and also acted as an opacifier. ZnO-incorporated Cosmesil M511 specimens showed minimal or no color change and proved to be most color stable after being subjected to outdoor weathering.
An older patient reporting to the dental surgery for his/her dental treatment is becoming a common occurrence. Improved oral hygiene has meant that teeth are retained for a longer time, along with the potential problems of attrition, decreased vertical dimension, temporomandibular joint discomfort/strain, and poor aesthetics. The case in question is that of a 65-year-old male patient who had severe attrition in the lower arch, temporomandibular joint pain and reduced vertical dimension. The maxillary arch had previously been restored with a fixed partial prosthesis. For restoration of the lower teeth, a removable cast titanium overlay denture was fabricated incorporating an increased vertical dimension. Porcelain facings were placed to restore the aesthetics of the anterior teeth. The titanium was cast in a semi-automatic electric arc, pressure type casting machine. A titanium overlay denture with porcelain facing on the anterior teeth may provide a means of restoring a patient's concerns regarding aesthetics and function.
Prosthetic rehabilitation of facial defects has always perplexed maxillofacial prosthodontists. Facial defects lead to functional and cosmetic deficiencies. Early rehabilitation improves patients' quality of life. Osseointegrated rehabilitation of the maxillofacial prosthetic patient presents the potential for overcoming many of the disadvantages associated with conventional retentive methods. This paper presents the clinical report of a patient who had undergone partial rhinectomy due to basal cell carcinoma. Following post-surgical healing, the patient was rehabilitated with a temporary acrylic resin nasal prosthesis retained by eyeglass frame. Later a silicone nasal prosthesis supported by an implant-retained framework was fabricated as a definitive replacement.
Prosthetic rehabilitation of the midfacial defects has always perplexed maxillofacial prosthodontists. These midfacial defects lead to functional and cosmetic deficiencies. One of the causes of such defects is midline lethal granuloma, which is a destructive granulomatous lesion of uncertain aetiology, involving the nose, paranasal sinuses and the palate. Presented here is a clinical report of a 22-year-old male patient diagnosed to have lethal midline granuloma, who was referred to the Department of Prosthodontics, SDM College of Dental Sciences Dharwad. The patient had a severe midfacial defect involving the nose, the paranasal sinuses, the palate and the soft tissues of the face. Although the lesion was not of the rapidly progressive type at the time of rehabilitation, the non-specific inflammatory process was persisting. The patient was treated with chemotherapy and palliative therapy. The primary objective of the prosthetic rehabilitation was to provide closure of the severe defect to protect the soft tissues from environmental exposure. Secondarily the prosthesis also provided acceptable aesthetics and psychological benefit to the patient.
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