ABSTRACT
Dentures with dental plaque predispose recurrent hyperplasia on the palatal mucosa. Surgical procedures for the treatment of inflammatory papillary hyperplasia involve postsurgical discomfort and morbidity. This repot describes clinical and histologic aspects of a patient with severe akantolitic inflammatory papillary hyperplasia. The palatal mucosa was treated with a surgical bur with a low-speed handpiece. A new removable denture was performed and adapted. A follow-up of 4 years showed staility of health at palatal mucosa. Patient referred low discomfort and morbidity when using bur technique. Control of removable denture was critical for long-term healing and soft tissue stability.
Las prótesis dentales con placa bacteriana predisponen a la hiperplasia recurrente en la mucosa palatina. Los procedimientos quirúrgicos para el tratamiento de la hiperplasia papilar inflamatoria implican molestias y morbilidad posquirúrgicas. Este reporte describe los aspectos clínicos e histológicos de un paciente con hiperplasia papilar inflamatoria acantolítica severa. La mucosa palatina fue tratada con una fresa quirúrgica con una pieza de mano de baja velocidad. Se realizó y adaptó una nueva prótesis parcial removible. Después de un seguimiento de 4 años, se encontró estabilidad de la salud de la mucosa palatina. El paciente se refirió a la baja incomodidad y morbilidad al usar la técnica de la fresa. El control de la prótesis parcial removible fue crítico para la cicatrización a largo plazo y la estabilidad de los tejidos blandos, evitando la recidiva de la hiperplasia papilar inflamatoria.
ABSTRACT
Objective@#To fabricate Ti alloy frameworks for a maxillary complete denture with three-dimensional printing (3DP) technique, such as selective laser melting (SLM) and electron beam melting (EBM), and to evaluate the microstructure of these frameworks and their adaptation to the die stone models.@*Methods@#Thirty pairs of edentulous casts were divided into 3 groups randomly and equally. In each group, one of the three techniques (SLM, EBM, conventional technique) was used to fabricate Ti alloy frameworks. The base-cast sets were transversally sectioned into 3 sections at the distal of canines, mesial of first molars, and the posterior palatal zone. The gap between the metal base and cast was measured in the 3 sections. Stereoscopic microscope was used to measure the gap. Three pieces of specimens of 5 mm diameter were fabricated with Ti alloy by SLM, EBM and the traditional casting technology (as mentioned above). Scanning electron microscope (SEM) was used to evaluate the differences of microstructure among these specimens.@*Results@#The gaps between the metal base and cast were (99.4±17.0), (98.2±26.1), and (99.6± 16.1) μm in conventional method; (99.4 ± 22.8), (83.1 ± 19.3), and (103.3 ± 13.8) μm in SLM technique; (248.3±70.3), (279.1±71.9), and (189.1±31.6) μm in EBM technique. There was no statistical difference in the value of gaps between SLM Ti alloy and conventional method Ti alloy group (P>0.05). There was statistical difference among EBM Ti alloy, conventional method Ti alloy and SLM Ti alloy group (P<0.05). The SLM Ti alloy showed more uniform and compact microstructure than the cast Ti alloy and EBM Ti alloy did.@*Conclusions@#SLM technique showed initial feasibility to manufacture the dental base of complete denture. The mechanical properties and microstructure of the denture frameworks prepared by SLM indicate that these dentures are appropriate for clinical use. EBM technique is inadequate to make a complete denture now.