Aim:
The aim of the study was to compare the assessment methods used to evaluate the fit of Ni-Cr metal copings.
Settings and Design:
Comparative-
Invitro
study design.
Materials and Methods:
A stainless steel die simulating a prepared first maxillary premolar was used as a master die. Wax pattern copings were fabricated by the conventional dipping wax technique (
n
= 20) on the master die and were cast in Ni-Cr alloy. The finished copings were fitted on the master die and scanned by the micro-computed tomography (CT) scanner. Multiple projections of the sample were reconstructed to evaluate the marginal and internal fit at 5 predetermined locations. The same copings were used for the replica technique and were evaluated under a stereomicroscope in the same locations.
Statistical Analysis Used:
Shapiro–Wilk's test and Unpaired
t
-test
Results:
The marginal fit values observed were 127.71 and 95.06 μm, chamfer area fit values were 151.97 and 132.7 μm, axial area fit values were 62.36 and 46.14 μm, axio-occlusal area fit values were 139.52 and 123.6 μm, occlusal area fit values were slightly higher with 217.91 and 193.1 μm, respectively, in replica and micro-CT technique. There was no statistically significant difference observed in the fit between the two assessment methods (α > 0.05).
Conclusions:
There was no difference observed in the marginal and internal fit of Ni-Cr metal copings with the two methods of assessment. However, the micro-CT technique proved to be simpler, noninvasive, and time-saving assessment method.
Squamous cell carcinoma is one of the most common malignant lesions in the oral cavity. This lesion can present itself on the tongue and may be treated by a combination of surgery, radiation therapy, and chemotherapy. When present on the lateral border of the tongue hemiglossectomy of the affected side is required. This results in altered functional movements, posture and adaptation of the tongue. This condition can be aggravated by deficient alveolar ridge, suturing of the flap across the crest of the ridge, high tissue attachments, altered floor of the mouth and loss of buccal and lingual sulcus. Prosthetic management in such cases includes an unconventional procedure to treat the patient. This article presents a clinical report on the rehabilitation of a partially edentulous patient with right sided hemiglossectomy with maxillary cast partial denture and mandibular flexible denture.
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