Aim:The aim of this in vitro study was to comparatively evaluate the effect of chemical disinfectants on the surface detail reproduction, dimensional stability and surface texture of polyvinyl siloxane (PVS) impressions.Materials and Methods:The impressions were then divided into five groups (fifteen samples per group) and subjected to a ten minutes immersion with 2% glutaraldehyde (Group I), 1% sodium hypochlorite (Group II), freshly prepared electrolyzed oxidizing water (EOW) with different pH values - acidic (Group III), alkali (Group IV) and neutral (Group V). The samples were examined pre and post-immersion under visual observation for surface detail reproduction, travelling microscope for measurement of dimensional stability and surface profilometer (3D) for evaluation of surface texture. A standardized master die was fabricated and seventy-five PVS test samples were made. The samples were subjected to immersion disinfection and studied for surface detail reproduction, dimensional stability and surface texture. Post-hoc test, paired t test and ANOVA were used to analyze dimensional stability statistically both within and between the test groups.Results:The surface detail reproduction was satisfactory with both pre and post-immersion test samples. A statistically significant dimensional change was observed post-immersion in Groups II, III and V test samples and a statistically insignificant dimensional change was observed in Groups I and IV test samples. There was a negligible change in surface texture post-immersion in Groups I, III, IV and V test samples with a slight increase in surface roughness post-immersion in Group II samples.Conclusion:In this study, all the test disinfectants produced satisfactory surface detail reproduction on Polyvinyl siloxane impressions. 2% glutaraldehyde and electrolyzed oxidizing water (alkali) have resulted in statistically insignificant dimensional change, while 1% sodium hypochlorite, electrolyzed oxidizing water (acidic) and electrolyzed oxidizing water (neutral) have resulted in statistically significant dimensional changes. All the test disinfectants except 1% sodium hypochlorite showed a reduction in surface roughness (Ra) values.
Patients often present with congenital and acquired tooth loss, traumatic injuries, and it is incumbent on the prosthodontics team to diagnose educate and provide care plans that address the range of issues concerning the young adult needing tooth replacement therapy. The challenge in treating patients with missing teeth in young adult patients and concomitant malocclusion, particularly in the long-term is how to achieve the best esthetic and functional results. The diagnostic phase is critical and involves an interdisciplinary team. Auto-transplantation of teeth and orthodontic space closure represent viable biological approaches for replacement of incisors because of the permanence of the result, particularly in growing individuals. Even if solid comparative research data for the different replacement methods so far are not available, a compilation of all treatment modalities can produce treatment results that are almost indistinguishable from an intact dentition. This will lead to progressive care plans that engage removable, fixed, and implant prosthodontics with an eye to a multidisciplinary approach. This paper will review the critical points of assessment, key points to consider, and then provide clinical examples of care plans for the transitional adult in our practice. The goal should be that patients who have received treatment for missing teeth will have treatment results that are indistinguishable from normal appearance. A prerequisite is that the therapy is based on a complete diagnosis, that the indications for the selected approach are present, and that attention to detail throughout treatment is exercised by all involved in the treatment.
Edentulous orofacial dyskinesia is a rare condition, characterized by involuntary rhythmic movements of the mandible and presents an embarrassing situation for the patient. Edentulism has been considered as one of the proponents of these irregular movements, and rehabilitation of these patients with complete denture-fabrication using traditional technique restores the masticatory inefficiency and the esthetic component of the patient. Surprisingly, these movements disappear during the clinical steps of complete denture-fabrication and upon insertion of the dentures. Disturbances in the proprioception following loss of tooth may be a contributory factor for edentulous dyskinesia.
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