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1.
Rev. Fac. Odontol. (B.Aires) ; 36(82): 57-65, 2021. ilus, tab, graf
Article in Spanish | LILACS | ID: biblio-1292129

ABSTRACT

Objetivos: Estimar la prevalencia de nódulos pulpares y agujas cálcicas en pacientes atendidos en la Cátedra de Endodoncia, Facultad de Odontología, Universidad de Buenos Aires (CEFOUBA). Se analizaron radiografías de 1866 piezas dentarias, con ápices maduros, de pacientes de ambos géneros, mayores de 15 años, tratados en CEFOUBA, en el período comprendido entre junio-noviembre de 2018. Género, edad, grupo dentario, condición del diente, presencia de patología sistémica, y ubicación anatómica, fueron las variables registradas. Se calcularon intervalos de confianza 95%, método score de Wilson. Se utilizó test z para diferencias de proporciones. El porcentaje de piezas con calcificaciones superó significativamente a piezas sin calcificaciones (z= 6,076; P<0,05). Porcentaje de piezas en mujeres fue significativamente mayor al de hombres (z=24,31; P<0,05). Porcentaje de piezas de las cuartas y quitas décadas de la vida (61%) superó significativamente a las demás décadas (39%) (z=9,88; P<0,05). El porcentaje de piezas con caries fue significativamente mayor al resto de las piezas con otras condiciones (41%) (z= 8,074; P<0,05). El porcentaje de piezas en pacientes sanos (77%) fue significativamente mayor al resto de las condiciones (23%) (z=24,310; P<0,05). El porcentaje de calcificaciones en cámara (78%) fue significativamente mayor a las del conducto (22%) (z=25,21; P<0,05). En conclusión, la presencia de este tipo de calcificaciones es frecuente en molares de pacientes femeninos y edad adulta. Es importante detectarlos radiográficamente porque complican la realización del tratamiento endodóntico, especialmente si están adheridos y obliteran la entrada de los conductos (AU)


Subject(s)
Humans , Male , Female , Adolescent , Adult , Dental Pulp Calcification/epidemiology , Dental Pulp Calcification/diagnostic imaging , Argentina , Schools, Dental , Radiography, Dental/statistics & numerical data , Cross-Sectional Studies
2.
Article in English | IMSEAR | ID: sea-154655

ABSTRACT

In routine dental radiography, one may encounter numerous radiographic errors, one of which may be partial images or cone cuts. These cones cut errors although may appear as simple problems, but often persistent cone cuts may be frustrating to the dental practitioner. In this study, our main aim was to find and solve the origin of the problem. This study was conducted with two different intraoral X‑ray machines with 12 inch length position indicating devices (PIDs) with four No. 2 intraoral films. If the problem is originated in the X‑ray machine, it can be solved by either tapping the collimator or by repositioning the PID.


Subject(s)
Dentists , Radiography, Dental/instrumentation , Radiography, Dental/methods , Radiography, Dental/trends , Radiography, Dental/statistics & numerical data
3.
J. appl. oral sci ; 19(5): 488-492, Sept.-Oct. 2011. ilus, tab
Article in English | LILACS | ID: lil-600850

ABSTRACT

Statistical analysis of data is crucial in cephalometric investigations. There are certainly excellent examples of good statistical practice in the field, but some articles published worldwide have carried out inappropriate analyses. OBJECTIVE: The purpose of this study was to show that when the double records of each patient are traced on the same occasion, a control chart for differences between readings needs to be drawn, and limits of agreement and coefficients of repeatability must be calculated. MATERIAL AND METHODS: Data from a well-known paper in Orthodontics were used for showing common statistical practices in cephalometric investigations and for proposing a new technique of analysis. RESULTS: A scatter plot of the two radiograph readings and the two model readings with the respective regression lines are shown. Also, a control chart for the mean of the differences between radiograph readings was obtained and a coefficient of repeatability was calculated. CONCLUSIONS: A standard error assuming that mean differences are zero, which is referred to in Orthodontics and Facial Orthopedics as the Dahlberg error, can be calculated only for estimating precision if accuracy is already proven. When double readings are collected, limits of agreement and coefficients of repeatability must be calculated. A graph with differences of readings should be presented and outliers discussed.


Subject(s)
Humans , Cephalometry/statistics & numerical data , Radiography, Dental/statistics & numerical data , Algorithms , Models, Statistical , Reference Standards , Reproducibility of Results , Time Factors
4.
Arq. odontol ; 45(1): 51-56, 2009. tab
Article in Portuguese | LILACS, BBO | ID: lil-556544

ABSTRACT

Este estudo visou detectar e quantificar os erros encontrados em radiografias periapicais realizadas por alunos do Programa de Treinamento Profissional em Radiologia da Faculdade de Odontologia da UFJF. Um total de 855 radiografias foram avaliadas por quatro examinadores, e divididas em oito Grupos, de acordo com a região radiografada. Cada uma das radiografias foi avaliada quanto aos erros de técnica e de processamento. As regiões com maior quantidade de radiografias descartadas (maior número de erros) foram as de molares superiores (20,46%) e inferiores (19,06%). O erro mais prevalente foi a presença de riscos e lacerações na radiografia (18,66%), seguido pelo erro de corte da região apical dos dentes (11,98%) e radiografia manchada (11,39%).


The purpose of this study was to detect and quantify the errors found in periapical radiographs taken by students from the Radiology ProfessionalTraining Program from the Dental School of Universidade Federal de Juiz de Fora. A total of 855 radiographs were evaluated by four examiners,divided into eight Groups, according to the region in which the radiograph was taken. Each radiograph was evaluated according to errors in technique andprocessing. The tooth regions with a larger amount of discarded radiographs (greater number of errors) were that of maxillary molars (20.46%) andmandibular molars (19.06%). The most prevalent error was the presence of scratches and cuts on the radiograph (18.66%), followed by cut errors in theapical region of the teeth (11.98%) and stained radiographs (11.39%).


Subject(s)
Humans , Male , Female , Diagnostic Errors/statistics & numerical data , Radiography, Dental/statistics & numerical data , Quality Control , Data Interpretation, Statistical
5.
Univ. odontol ; 17(36): 19-27, sept. 1998. tab, graf
Article in Spanish | LILACS | ID: lil-243368

ABSTRACT

Este estudio describió y comparó la estabilidad esquelética de pacientes sometidos a cirugía ortognática que presentaron grandes discrepancias óseas. En un estudio retrospectivo, donde los datos fueron extraídos de las historias clínicas de 26 pacientes seleccionados, según las cuales no tuvieron cirugías previas, presentaron radiografías prequirúrgicas, posquirúrgicas y de control, tomadas todas en el mismo lugar. Las técnicas quirúrgicas estudiadas fueron avance maxilar, avance mandibular, retroceso mandibular y cirugía bimaxilar, y las técnicas de fijación rígidas y no rígidas. Se compararon los puntos cefalométricos de las tres radiografías y se realizó análisis de promedio, desviación estándar, la prueba de t de student y correlación paramétrica. Ningún cambio significativo fue detectado en el sentido vertical. El retroceso mandibular presentó el mayor promedio de recidiva en el punto B de 3.02 mm. y pogonio de 3.12 mm. en sentido horizontal. Se presentó 20 por ciento menos de recidiva en el grupo en el cual se usó fijación rígida


Subject(s)
Humans , Male , Female , Adolescent , Adult , Prognathism/surgery , Recurrence , Retrognathia/surgery , Osteotomy , Osteotomy/statistics & numerical data , Cephalometry , Reproducibility of Results , Retrospective Studies , Mandibular Advancement , Mandibular Advancement/statistics & numerical data , Medical History Taking , Data Interpretation, Statistical , Malocclusion, Angle Class II/diagnosis , Malocclusion, Angle Class III/diagnosis , Osteotomy, Le Fort/statistics & numerical data , Radiography, Dental/statistics & numerical data , Jaw Fixation Techniques/statistics & numerical data
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