RESUMO
PURPOSE@#The bond strengths between resin denture teeth with various compositions and denture base resins including conventional and CAD/CAM purposed materials were evaluated to find influence of each material. @*MATERIALS AND METHODS@#Cylindrical rods (6.0 mm diameter × 8.0 mm length) prepared from pre-polymerized CAD/CAM denture base resin blocks (PMMA Block-pink; Huge Dental Material, Vipi Block-Pink; Vipi Industria) were bonded to the basal surface of resin teeth from three different companies (VITA MFT® ; VITA Zahnfabrik, Endura Posterio® ; SHOFU Dental, Duracross Physio® ; Nissin Dental Products Inc.) using resin cement (Super-Bond C&B; SUN MEDICAL). As a control group, rods from a conventional heat-polymerizing denture base resin (Vertex™ Rapid Simplified; Vertex-Dental B.V. Co.) were attached to the resin teeth using the conventional flasking and curing method. Furthermore, the effect of air abrasion was studied with the highly cross-linked resin teeth (VITA MFT® ) groups. The shear bond strengths were measured, and then the fractured surfaces were examined to analyze the mode of failure. @*RESULTS@#The shear bond strengths of the conventional heat-polymerizing PMMA denture resin group and the CAD/CAM denture base resin groups were similar. Air abrasion to VITA MFT® did not improve shear bond strengths. Interfacial failure was the dominant cause of failure for all specimens. @*CONCLUSION@#Shear bond strengths of CAD/CAM denture base materials and resin denture teeth using resin cement are comparable to those of conventional methods.
RESUMO
The maxillary anterior teeth play an important role in esthetics. The esthetic of maxillary anterior teeth is closely related to tooth morphology and also harmony with gingiva. Precise diagnosis and treatment plan are essential to satisfy patient's demand, and sometimes surrounding soft tissue management is involved to achieve the goal. Gingivectomy can be considered as one method to make esthetic restoration possible. As well as esthetics, function has to be considered in maxillary anterior teeth restoration. Definitive cast of abutment and diagnostic cast waxed up labially were superimposed with model scanner, so can provide former comfortable occlusion. This case report demonstrates functional and esthetic improvements of two patients through gingivectomy and the data of superimposed image of casts.
Assuntos
Humanos , Diagnóstico , Estética , Gengiva , Gengivectomia , Métodos , DenteRESUMO
In ocular surgery, many studies have been carried but in order to evaluate intraocular pressure chance during induction and maintenance of anesthesia. In this study, Vecuronium (Norcuron), new monoquaternary analogue of pancuronium, has been used in a group of patient undergoing elective sugery in order to evaluate its influe-nce on intraocular pressure. 40 patients without a history of eye digease, in age from 20 to 60 years, were evaluated. Their condition fell into ASA class l. On arrival, initial measurement of intraocular pressure(as control value) was taken with Shiotg tonometer after instilling a 0.5% pontocaine into conjuntival sac. Subsequent measurements were taken after thiopental injeotion as soon at the lid reflex was lost, then 2 minutes after Vecuronium injection, 1,3,5,10 and 20 minutes after endot-racheal intuhation. Blood pressure and pulse rate were measured together. The results were as follows, 1. At 2 minutes after intubation, intraocular pleasure was decreased as compared with the control value. 2. At 1 minute after intutation, intraocular pressure was more increased than the value of 2 minutes after vecuronium injection. but was not significantly changed as compared with control valule. 3. All values measured followed 3 minutes after intubation were significantly derceased. 4. Mean arterial pressure and pulse rate were increased at 1 minute after intubation but all the other values were not significantly changed as compared with control value.