ABSTRACT
BACKGROUND: The confection of a fixed prosthesis finds its indication in response to the patient's aesthetic and/or functional whose requirements are stronger in terms of satisfaction. This involves maintaining the stability of prosthetic reconstructions on a sufficiency long time. To achieve this, the preservation of periodontal health of the prosthetic abutments occupies a special choice. PURPOSE: The aim of this study was to evaluate the periodontal health of fixed prosthesis abutment. MATERIALS AND METHODS: Thirty-nine patients having fixed prosthesis in the mouth for more than one year participated in our study. Ultimately, 38 single crowns and 27 seven bridges based on 100 abutments have been recorded. After an interview, clinical and radiographic examination was performed. It was to assess the level of oral hygiene, the health of the superficial and deep periodontal abutment using OHIS index of Green and Vermilion, periodontal index of Russel and mobility index of Mühlemann. RESULTS: On the 100 abutments examined, gingivitis (14%), gingival recession (13%), bone osteolysis (29%) and mobility (5%) were recorded. In addition, about 60% of patients had inadequate oral hygiene and less than 30% of them had a regular prosthetic maintenance. CONCLUSION: From this study, it appears that complications affecting periodontal prosthetic abutments are essentially bone lysed (29%), gingivitis (14%) and gingival recessions (13%).
Subject(s)
Crowns , Dental Abutments , Denture, Partial, Fixed , Periodontal Index , Adult , Alveolar Bone Loss/classification , Cross-Sectional Studies , Dental Calculus/classification , Dental Plaque Index , Dental Prosthesis Retention/classification , Female , Gingival Recession/classification , Gingivitis/classification , Humans , Male , Middle Aged , Oral Hygiene Index , Young AdultABSTRACT
STATEMENT OF PROBLEM: Although criteria for assessing bone quality have been reported, an overall score that correlates bone quality with the primary stability and secondary stability of implants is not yet available. PURPOSE: The purpose of this article was to propose a scoring index that will establish a correlation among the bone density values from computed tomography, maximum insertion torque values, and resonance frequency analysis in different phases of implant treatment. MATERIAL AND METHODS: In this study, 60 implant sites were evaluated to assess bone density (Hounsfield units), insertion torque values (Ncm), and primary stability and secondary stability (implant stability quotient values obtained by using resonance frequency analysis). On the basis of computed tomography data, the bone was classified as D1 to D4. The insertion torque was noted and classified into 2 groups, A and B. The implant stability quotient values obtained from resonance frequency analysis depicting primary stability and secondary stability were classified into 5 groups. The primary score noted was a result of the values obtained for the 3 parameters at the time of implant placement. The secondary score was obtained by considering the values of the bone density and resonance frequency analysis recorded at different time intervals. RESULTS: Bone densities of D2, D3, and D4 were noted, dividing the bone type into 3 groups. The maximum torque noted in the study was 40 Ncm. The difference between various insertion torque values and bone types was found to be statistically nonsignificant. Higher mean implant stability quotient values were obtained for primary and secondary stability for the D2 bone than for D3 and D4 bone. When analyzed according to the time of insertion, the mean values increased at second stage surgery in all bone types. The difference in mean values among all bone types was found to be statistically significant (P<.001). A comparison of primary and secondary implant stability quotient values in all bone types did not find any statistical significance (P=.780). A score was recorded at the time of implant placement and at the time of second stage surgery, and the prosthetic treatment was planned accordingly. CONCLUSIONS: The score highlights the importance of considering the association of bone quality, insertion torque values, and stability as denoted by implant stability quotient throughout treatment. Based on the variation in the score noted at recall visits, alterations in the treatment plan can be made with respect to the healing period and prosthetic design.
Subject(s)
Bone Density/physiology , Dental Implantation, Endosseous/classification , Dental Implants , Dental Prosthesis Retention/classification , Dental Prosthesis Design , Humans , Operative Time , Osseointegration/physiology , Tomography, X-Ray Computed/methods , Torque , VibrationABSTRACT
Se realizó un estudio in vitro utilizando ocho anclajes retentivos resilientes y no resilientes: los anclajes individuales a bola Dalla Bona y O-Ring, magnetos Dyna y Shiner, junto a los anclajes individuales a broches Ceka-Revax y las Uniones Zaag y, por último, los sistemas a barras: coladas (tipo Dolder) con clips y las barras fresadas. Se preparan ocho muestras con sus respectivas sobredentaduras para trasladarlas a las pruebas de tracción de la máquina universadl de ensayos mecánicos (Instron). Durante la simulación de cargas se registran datos de los grupos involucrados, permitiendo observar los resultados de tracción y de oposición vertical. Para reunir más elementos se realiza un análisis estadístico, confeccionando ocho tablas para la comparación de todos los grupos entre sí. Los resultados que se obtienen, sumados a las experiencias clínicas e in vitro de otros autores, permiten evaluar las ventajas de la correcta selección de los anclajes retentivos. El desarrollo protético lleva a conclusiones concretas remarcando la interrelación entre el planeamiento preprotético, la retención y la estabilidad frente a los vectores ánteroposteriores (AU)
