RESUMEN
BACKGROUND: In a recent study it was found that following non-surgical treatment, probing depth (PD) reduction in proximal sites is significantly less in the presence of a vertical destruction in the adjacent site of the neighboring tooth. The present investigation was undertaken to study whether the presence of a proximal furcation involvement also influences the periodontal conditions in the adjacent site of the neighboring tooth. METHODS: The investigation was conducted as a retrospective study on a consecutive referral population based on full-mouth oral radiographic examinations and PD and plaque score registrations. The statistical analyses were performed on a final sample of 136 patients, with 153 (periodontal status) and 123 (periodontal healing) second maxillary premolars with an adjacent first maxillary molar. RESULTS: Baseline pockets were significantly deeper, relative radiographic attachment levels significantly reduced, and periodontal PD significantly less reduced after non-surgical treatment in the distal sites of second maxillary premolars adjacent to first maxillary molars with a mesial furcation involvement of degree > or = 2, compared to distal sites adjacent to first maxillary molars with a mesial furcation involvement of degree < or = 1. CONCLUSIONS: Periodontal status and healing after non-surgical treatment in proximal sites are negatively influenced by the presence of a deep furcation involvement in the adjacent site in the same proximal space. The presence of a deep proximal furcation involvement should consequently be considered a risk factor for the adjacent site of the neighboring tooth.
Asunto(s)
Defectos de Furcación/fisiopatología , Bolsa Periodontal/terapia , Adulto , Anciano , Pérdida de Hueso Alveolar/diagnóstico por imagen , Pérdida de Hueso Alveolar/fisiopatología , Pérdida de Hueso Alveolar/terapia , Diente Premolar , Índice de Placa Dental , Raspado Dental , Defectos de Furcación/clasificación , Defectos de Furcación/diagnóstico por imagen , Humanos , Maxilar , Persona de Mediana Edad , Diente Molar , Higiene Bucal , Pérdida de la Inserción Periodontal/diagnóstico por imagen , Pérdida de la Inserción Periodontal/fisiopatología , Pérdida de la Inserción Periodontal/terapia , Bolsa Periodontal/diagnóstico por imagen , Bolsa Periodontal/fisiopatología , Radiografía , Análisis de Regresión , Estudios Retrospectivos , Factores de Riesgo , Estadística como Asunto , Curetaje Subgingival , Cicatrización de HeridasRESUMEN
The purpose of the study was to investigate if the presence of vertical destruction in proximal sites influences periodontal status and healing in adjacent sites in the same proximal space without vertical destruction. The investigation was conducted as a retrospective study on a 3-year consecutive referral population of periodontitis-prone patients based on full-mouth oral radiographic examinations, probing pocket depth registrations and plaque scores. The analyses were performed by using regression analyses on a final sample of 1169 (periodontal status) and 1051 (periodontal healing) proximal sites in 163 patients. The relative radiographic attachment level (RRAL) in proximal horizontal sites did not depend on the type of destruction, vertical or horizontal, in the adjacent proximal sites. However, after non-surgical treatment, pocket-depth reduction in proximal sites with horizontal destruction was significantly reduced in the presence of a vertical destruction in the adjacent proximal site compared to the corresponding sites adjacent to a horizontal defect. It was concluded that marginal periodontal healing in proximal sites with horizontal destruction is impaired by the presence of a vertical destruction in the adjacent proximal site.
Asunto(s)
Pérdida de Hueso Alveolar/fisiopatología , Proceso Alveolar/fisiopatología , Periodoncio/fisiopatología , Adulto , Anciano , Pérdida de Hueso Alveolar/diagnóstico por imagen , Pérdida de Hueso Alveolar/terapia , Proceso Alveolar/diagnóstico por imagen , Índice de Placa Dental , Raspado Dental , Progresión de la Enfermedad , Humanos , Persona de Mediana Edad , Higiene Bucal , Educación del Paciente como Asunto , Pérdida de la Inserción Periodontal/diagnóstico por imagen , Pérdida de la Inserción Periodontal/fisiopatología , Pérdida de la Inserción Periodontal/terapia , Bolsa Periodontal/diagnóstico por imagen , Bolsa Periodontal/fisiopatología , Bolsa Periodontal/terapia , Periodontitis/diagnóstico por imagen , Periodontitis/fisiopatología , Periodontitis/terapia , Periodoncio/diagnóstico por imagen , Radiografía , Análisis de Regresión , Estudios Retrospectivos , Cicatrización de HeridasRESUMEN
The purpose of the study was to investigate the influence of an endodontic infection on periodontal probing depth and presence of furcation involvement in periodontally-involved mandibular molars. All first and second mandibular molars in 100 patients were selected if at least one was root-filled or had a possible periapical radiolucency. The sample consisted of patients from a referral population at a periodontal clinic which represented an adult population with a mean age between 50 and 60 years. For mandibular molars with periapical destruction at both roots, mean periodontal probing depth was significantly greater compared to teeth without periapical destruction. Horizontal furcation depths > or =3 mm were significantly more frequent at mandibular molars with periapical destruction. It is suggested that a root canal infection in periodontitis-involved molars may potentiate periodontitis progression by spreading of endodontic pathogens through patent accessory canals and dentinal tubules. In conclusion, an endodontic infection in mandibular molars was found to be associated with additional attachment loss in the furcation area, and may thus be considered to be one of several risk factors influencing the prognosis of molars in periodontitis-prone patients.
Asunto(s)
Enfermedades de la Pulpa Dental/microbiología , Diente Molar , Enfermedades Periodontales/complicaciones , Adulto , Anciano , Índice de Placa Dental , Dentina/microbiología , Dentina/ultraestructura , Progresión de la Enfermedad , Defectos de Furcación/complicaciones , Hemorragia Gingival/complicaciones , Humanos , Mandíbula , Persona de Mediana Edad , Enfermedades Periapicales/complicaciones , Pérdida de la Inserción Periodontal/complicaciones , Índice Periodontal , Bolsa Periodontal/complicaciones , Periodontitis/complicaciones , Pronóstico , Factores de RiesgoRESUMEN
The purpose of the present study was to compare tooth mortality of root-resected molars with that of root-filled, single-rooted teeth. Survival rates were 68% for root-resected molars and 77% for root-filled single-rooted teeth over a 10-year period. This difference was not statistically significant. Ten-year survival of root-resected molars in patients with radiographic attachment loss in single-rooted teeth of greater than 6 mm was 56% while survival was as high as 89% for root-resected molar patients with radiographic attachment loss in single-rooted teeth less than or equal to 6 mm. In conclusion, the prognosis of root-resection is not poorer than the prognosis of single-rooted teeth with an equal susceptibility to periodontitis, if endodontic conditions and maintenance care are optimal.
Asunto(s)
Diente Molar/cirugía , Pérdida de Diente/epidemiología , Raíz del Diente/cirugía , Adulto , Anciano , Análisis de Varianza , Femenino , Humanos , Masculino , Persona de Mediana Edad , Diente Molar/diagnóstico por imagen , Variaciones Dependientes del Observador , Pronóstico , Radiografía , Distribución Aleatoria , Estudios Retrospectivos , Tratamiento del Conducto Radicular , Análisis de Supervivencia , Pérdida de Diente/diagnóstico por imagen , Raíz del Diente/diagnóstico por imagenRESUMEN
The aim of the present study was to investigate any relationship between the level of oral hygiene and probing pocket depth reduction over time after periodontal treatment in sites with either vertical or horizontal destructions. The investigation was conducted as a retrospective study on a 3-year consecutive referral population of periodontitis-prone patients based on full-mouth oral radiographic examinations, probing pocket depth registrations and plaque scores. The analyses were performed on a final sample of 3064 sites in 107 patients with regression analysis after adjusting for dependence within the patient. Probing pocket depth was significantly less reduced over time in sites with vertical destructions compared to sites with horizontal destructions following non-surgical treatment. Furthermore, the difference in probing pocket depth reduction between vertical and horizontal defects following non-surgical treatment increased over time in sites with plaque compared to sites without plaque, thus reflecting the importance of the patient's plaque control, especially in sites with vertical destructions. However, the difference in probing pocket depth reduction between vertical and horizontal defects did not increase over time for surgically treated teeth, a finding which probably can be attributed to a more thorough debridement of vertical defects during surgery and/or osteoplasty/osteoectomy limiting the surface area upon which a long junctional epithelium can form, which may facilitate recurrence of a periodontal pocket.
Asunto(s)
Higiene Bucal , Bolsa Periodontal/terapia , Periodoncio/patología , Adulto , Anciano , Alveolectomía , Alveoloplastia , Desbridamiento , Placa Dental/prevención & control , Índice de Placa Dental , Inserción Epitelial/patología , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Bolsa Periodontal/diagnóstico por imagen , Bolsa Periodontal/patología , Bolsa Periodontal/cirugía , Periodontitis/diagnóstico por imagen , Periodontitis/patología , Periodontitis/cirugía , Periodontitis/terapia , Periodoncio/diagnóstico por imagen , Radiografía , Recurrencia , Análisis de Regresión , Estudios Retrospectivos , Curetaje Subgingival , Colgajos Quirúrgicos , Cicatrización de HeridasRESUMEN
Periapical pathology indicating endodontic infection, when present in marginal periodontitis-affected teeth, has recently been shown to be an aggravating factor in progression of marginal destruction. This has been associated with patency of dentinal tubules in the tooth cervix, an area normally devoid of cementum following periodontal therapy. These studies are, however hampered by that only circumstantial evidence such as presence of periapical destruction have been applied as criteria of endodontic infection. The purpose of the present investigation was to study to what extent a predefined selection of endodontic pathogens inoculated in the root canal can influence periodontal pathology and healing in areas of the root covered by or devoid of cementum, using root resorption as a histomorphometric marker. Exposed dentine surfaces, in the present study showed significantly larger areas of resorption in infected roots compared to non-infected roots, while cementum surfaces showed an almost identical distribution of tissue reactions regardless of root canal infection or not. It was concluded that endodontic pathogens or their products were not able to penetrate the cementum barrier. The significantly larger areas of resorption on exposed dentine surfaces in infected roots compared to non-infected roots indicated that endodontic pathogens or their products could spread through dentinal tubules to a root surface void of cementum. Extrapolated to the marginal situation this indicated that endodontic pathogens in the root canal might be able to aggravate marginal infection in areas of root devoid of cementum.
Asunto(s)
Infecciones Bacterianas/complicaciones , Cemento Dental/fisiología , Cavidad Pulpar/microbiología , Resorción Radicular/microbiología , Animales , Infecciones Bacterianas/microbiología , Dentina/microbiología , Permeabilidad de la Dentina , Fusobacterium nucleatum/patogenicidad , Macaca fascicularis , Peptostreptococcus/patogenicidad , Periodoncio/microbiología , Porphyromonas gingivalis/patogenicidad , Resorción Radicular/etiología , Método Simple Ciego , Estadísticas no Paramétricas , Streptococcus/patogenicidad , Raíz del Diente/microbiología , Cicatrización de HeridasRESUMEN
The purpose of the present investigation was to determine magnitude and rate of proximal radiographic attachment loss in relation to endodontic infection in periodontally involved teeth. The investigation was conducted as a retrospective longitudinal study on a periodontitis-prone randomly selected referral population, including 175 single-rooted, root-filled teeth in 133 patients. An observation period of at least 3 years was required. Periapical conditions of the selected sample at baseline and re-examination were evaluated on radiographs, independently by 3 investigators. Each single-rooted, root-filled tooth of the sample was given a score according to the combined registrations. Radiographic attachment level was measured as the distance between the most coronal point of the alveolar bone and the apex at the mesial and distal sides of the tooth, and expressed as relative radiographic attachment level (RRAL) (radiographic attachment level at baseline/root length) at proximal sites for every tooth. Multiple regression analysis was used to study change in RRAL over time. Teeth in periodontitis-prone patients with progressing periapical pathology indicating a continuous root canal infection were found to lose comparatively more radiographic attachment than teeth with no signs of periapical pathology or teeth with an established periapical destruction which subsided during the observation period. An approximate 3-fold amplification of the rate of marginal proximal radiographic bone loss by endodontic infection in periodontitis-prone patients was found with an average 0.19 mm/year, while 0.06 mm/year was lost for teeth without endodontic infection or subsiding endodontic involvement.
Asunto(s)
Pérdida de Hueso Alveolar/etiología , Infecciones Bacterianas/complicaciones , Enfermedades de la Pulpa Dental/complicaciones , Enfermedades de la Pulpa Dental/microbiología , Periodontitis/complicaciones , Adulto , Anciano , Pérdida de Hueso Alveolar/diagnóstico por imagen , Cemento Dental/diagnóstico por imagen , Esmalte Dental/diagnóstico por imagen , Progresión de la Enfermedad , Femenino , Humanos , Estudios Longitudinales , Masculino , Persona de Mediana Edad , Enfermedades Periapicales/complicaciones , Enfermedades Periapicales/diagnóstico por imagen , Enfermedades Periapicales/microbiología , Pérdida de la Inserción Periodontal/diagnóstico por imagen , Pérdida de la Inserción Periodontal/etiología , Radiografía , Análisis de Regresión , Estudios Retrospectivos , Tratamiento del Conducto Radicular , Raíz del Diente/diagnóstico por imagenRESUMEN
Periapical pathology indicating endodontic infection, when present in periodontitis-affected teeth, has recently been shown to be correlated to marginal periodontal breakdown. This has been associated with patency of dentinal tubules in the tooth cervix, an area normally devoid of cementum following periodontal therapy. These studies are, however hampered by that only circumstantial evidence such as presence of periapical destruction have been applied as criteria of endodontic infection. The aim of the present investigation was to assess the effects of endodontic pathogens on marginal periodontal wound healing on root surfaces devoid of cementum but surrounded by healthy periodontal membrane. Significant differences between infected and non-infected teeth were found with respect to pathological pocket and connective tissue: The experimental defects were covered by approximately 20% more pocket epithelium in infected teeth while defects in non-infected teeth showed approximately 10% more connective tissue coverage. It was concluded, that an intra-canal infection of endodontic pathogens stimulates epithelial downgrowth along denuded dentin surfaces with marginal communication. Extrapolated to the clinical situation, endodontic infections in periodontitis-prone patients may augment periodontitis propagation.
Asunto(s)
Infecciones Bacterianas/fisiopatología , Enfermedades de la Pulpa Dental/microbiología , Enfermedades Periodontales/microbiología , Animales , Infecciones por Bacteroidaceae/fisiopatología , Tejido Conectivo/patología , Tejido Conectivo/fisiopatología , Cemento Dental/ultraestructura , Enfermedades de la Pulpa Dental/fisiopatología , Dentina/microbiología , Dentina/ultraestructura , Epitelio/patología , Epitelio/fisiopatología , Fusobacterium nucleatum/fisiología , Infecciones por Bacterias Grampositivas/fisiopatología , Macaca fascicularis , Peptostreptococcus/fisiología , Enfermedades Periapicales/microbiología , Enfermedades Periapicales/fisiopatología , Enfermedades Periodontales/patología , Enfermedades Periodontales/fisiopatología , Enfermedades Periodontales/terapia , Ligamento Periodontal/patología , Ligamento Periodontal/fisiopatología , Bolsa Periodontal/microbiología , Bolsa Periodontal/patología , Bolsa Periodontal/fisiopatología , Periodontitis/microbiología , Periodontitis/fisiopatología , Porphyromonas gingivalis/fisiología , Infecciones Estreptocócicas/fisiopatología , Streptococcus/fisiología , Curetaje Subgingival , Cicatrización de HeridasRESUMEN
The purpose of the present investigation was to evaluate the influence of overhanging marginal restorations on periodontal status and whether any such influence is modified by the patient's oral hygiene level and degree of radiographic attachment loss. The investigation was conducted as a retrospective study on a consecutive referral population. Periodontal pockets at proximal sites with marginal overhangs were significantly deeper (0.42 mm) compared to sites with metal restorations without overhangs. This difference was larger (0.62 mm) for sites with radiographic attachment loss < or = 6 mm, while no significant difference was found for sites with radiographic attachment loss > 6 mm. In patients with a mean radiographic attachment loss < or = 5 mm, an overhanging restoration margin was associated with a significantly increased loss of radiographic attachment (0.66 mm). It was concluded that the influence of a marginal overhang on pocket depth and radiographic attachment decreases with increasing loss of periodontal attachment in periodontitis-prone patients. The effect on pocket depth of a marginal overhang may act synergistically, potentiating the effect of poor oral hygiene.
Asunto(s)
Restauración Dental Permanente/efectos adversos , Enfermedades Periodontales/etiología , Adulto , Anciano , Pérdida de Hueso Alveolar/diagnóstico por imagen , Pérdida de Hueso Alveolar/etiología , Placa Dental/complicaciones , Índice de Placa Dental , Femenino , Humanos , Masculino , Persona de Mediana Edad , Higiene Bucal , Pérdida de la Inserción Periodontal/diagnóstico por imagen , Pérdida de la Inserción Periodontal/etiología , Bolsa Periodontal/diagnóstico por imagen , Bolsa Periodontal/etiología , Periodontitis/fisiopatología , Radiografía , Estudios Retrospectivos , Propiedades de SuperficieRESUMEN
The purpose of the present study was to compare the width of the periodontal space following two different marginal periodontal healing reactions (long epithelial junction and connective tissue healing involving formation of reparative cementum) with the width of normal periodontium, either intact or following reattachment. Twelve permanent lateral incisors in monkeys from a previous experimental study on periodontal wound healing on denuded surfaces were selected based on strict healing criteria. The periodontal width was measured histomorphometrically and compared to the periodontal width on the contra lateral side of the same root where reattachment had taken place and with the width of normal periodontal space of neighbouring untreated teeth. The mean periodontal width for both after formation of a long junctional epithelium and reparative cementum were significantly larger than the control width, approximately 290%. This may be taken as evidence of an impaired functional adaptation of the reparative tissue compared to a reestablished or normal periodontal membrane.
Asunto(s)
Cementogénesis , Inserción Epitelial/crecimiento & desarrollo , Periodoncio/fisiología , Reimplante Dental , Cicatrización de Heridas , Animales , Tejido Conectivo/crecimiento & desarrollo , Cemento Dental/fisiopatología , Inserción Epitelial/fisiopatología , Macaca fascicularis , Pérdida de la Inserción Periodontal/fisiopatología , Ligamento Periodontal/patología , Periodoncio/anatomía & histología , Estadísticas no ParamétricasRESUMEN
The aim of the present study was primarily to investigate if periodontal healing assessed by reduction in probing depth over time is significantly influenced by the initial degree of horizontal radiographic attachment loss and secondly to what degree any such relationship influenced the already established correlation between presence of a root canal infection and impaired marginal healing. The investigation was conducted as a retrospective study on 160 patients referred to a specialist periodontal clinic. The choice of variables was guided by an assumption that each variable either positively or negatively contributed to determine probing depth reduction. It was found that healing after scaling and root planing over time was significantly impaired with more advanced loss of radiographic attachment. Regardless of the extent of radiographic attachment loss, healing after scaling and root planing was also significantly impaired over time by the presence of a root canal infection.
Asunto(s)
Pérdida de Hueso Alveolar/complicaciones , Enfermedades de la Pulpa Dental/complicaciones , Bolsa Periodontal/fisiopatología , Bolsa Periodontal/terapia , Adulto , Anciano , Pérdida de Hueso Alveolar/diagnóstico por imagen , Infecciones Bacterianas/complicaciones , Índice de Placa Dental , Raspado Dental , Femenino , Humanos , Masculino , Persona de Mediana Edad , Variaciones Dependientes del Observador , Planificación de Atención al Paciente , Pérdida de la Inserción Periodontal/complicaciones , Índice Periodontal , Bolsa Periodontal/complicaciones , Periodontitis/diagnóstico por imagen , Periodontitis/etiología , Radiografía , Regeneración , Análisis de Regresión , Estudios Retrospectivos , Factores de Riesgo , Cicatrización de HeridasRESUMEN
The purpose of the present investigation was to examine the influence of a root canal infection on radiographic attachment. In addition, influence of the quality of the root fillings as well as the size of the periapical radiolucencies were studied. The investigation was conducted as a retrospective study on a consecutive referral population. The periapical conditions in endodontically-involved single-rooted teeth from a selected patient sample were correlated to the periodontal status of the teeth. Teeth with periapical lesions were found to have lost significantly more radiographic attachment, approximately 2 mm. A comparison between pocket depth in teeth with and without periapical pathology consistently showed that periapical pathology was significantly correlated to an increased pocket depth, also after adjusting for differences in radiographic attachment. It was concluded that periodontitis-prone teeth run a significantly higher risk of losing periodontal attachment if a root canal infection is also present and evident as a periapical radiolucency.
Asunto(s)
Enfermedades de la Pulpa Dental/complicaciones , Periodontitis Periapical/diagnóstico por imagen , Periodontitis Periapical/etiología , Ligamento Periodontal/diagnóstico por imagen , Adulto , Anciano , Factores de Confusión Epidemiológicos , Enfermedades de la Pulpa Dental/diagnóstico por imagen , Femenino , Humanos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Variaciones Dependientes del Observador , Pérdida de la Inserción Periodontal/diagnóstico por imagen , Pérdida de la Inserción Periodontal/etiología , Periodontitis/complicaciones , Radiografía , Análisis de Regresión , Reproducibilidad de los Resultados , Estudios Retrospectivos , Obturación del Conducto Radicular/efectos adversosRESUMEN
The purpose of the present investigation was to compare clinical periodontal healing in periodontally involved teeth with and without pulpal pathosis. The investigation was conducted as a retrospective study on a consecutive referral population. The periapical conditions in endodontically involved single-rooted teeth from a selected patient sample were evaluated and correlated with their periodontal healing pattern. Multiple regression analysis of the registered variables showed that initial mean pocket depth and time elapsed after treatment significantly influenced change in pocket-depth. Non-surgical treatment of periodontal pockets exceeding 2.5 mm in teeth with horizontal marginal defects, over the observation period, showed significantly reduced mean pocket depth reduction in teeth with periapical pathology compared to teeth without periapical pathology. It was, furthermore, evident that proximal restorations, abutments for fixed bridges and root fillings with and without dowels did not significantly influence pocket depth reduction in the present material. It was concluded, based on the present results, that a root-canal infection, evident as a periapical radiolucency, if left untreated may in the long term perspective result in retarded or impaired periodontal healing following periodontal therapy and, consequently, should be given appropriate consideration when coordinating endodontic therapy and periodontal treatment.
Asunto(s)
Enfermedades de la Pulpa Dental/complicaciones , Periodontitis Periapical/complicaciones , Bolsa Periodontal/fisiopatología , Cicatrización de Heridas , Adulto , Anciano , Infecciones Bacterianas/complicaciones , Enfermedades de la Pulpa Dental/fisiopatología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Periodontitis Periapical/fisiopatología , Bolsa Periodontal/complicaciones , Bolsa Periodontal/terapia , Análisis de Regresión , Estudios RetrospectivosRESUMEN
The purpose of the present investigation was to explore possible relationships between clinical periodontal status in periodontally involved teeth with and without endodontic infection. The investigation was conducted as a retrospective study on a consecutive referral population. The periapical conditions in endodontically-involved single-rooted teeth from a selected patient sample were evaluated and correlated to their periodontal status. There was a significant correlation between periapical pathology and vertical bony destructions. An intra-individual comparison between pocket depth in teeth with and without periapical pathology showed that periapical pathology was significantly correlated to an increased pocket depth in the absence of a vertical bony destruction. It was concluded that an endodontic infection, evident as a periapical radiolucency, promotes periodontal pocket-formation on an instrumented marginal root surface and, consequently, should be regarded as a risk factor in periodontitis progression and be given appropriate consideration in periodontal treatment planning.
Asunto(s)
Enfermedades de la Pulpa Dental/fisiopatología , Enfermedades Periodontales/fisiopatología , Adulto , Anciano , Pérdida de Hueso Alveolar/diagnóstico por imagen , Pérdida de Hueso Alveolar/fisiopatología , Pilares Dentales , Enfermedades de la Pulpa Dental/complicaciones , Enfermedades de la Pulpa Dental/diagnóstico por imagen , Enfermedades de la Pulpa Dental/patología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Enfermedades Periapicales/diagnóstico por imagen , Enfermedades Periapicales/fisiopatología , Enfermedades Periodontales/complicaciones , Enfermedades Periodontales/diagnóstico por imagen , Enfermedades Periodontales/patología , Bolsa Periodontal/patología , Bolsa Periodontal/fisiopatología , Radiografía , Estudios Retrospectivos , Diente/patologíaRESUMEN
The purpose of the present study was to follow the development of periapical lesions both radiographically and histologically in infected teeth with open and sealed root canals. The mandibular premolars from five adult monkeys were used in the experiment. Sealed infected teeth developed radiographic signs of periapical pathosis significantly earlier than unsealed teeth. Although, histological signs of pathology could be seen periapically at earlier observation periods, sealed teeth consistently developed these changes earlier than unsealed teeth. Furthermore, the histological periapical pathology differed somewhat between the two groups in that unsealed teeth showed a multi-focal diffuse pattern of spreading.
Asunto(s)
Enfermedades Periapicales/etiología , Animales , Placa Dental/microbiología , Cavidad Pulpar/diagnóstico por imagen , Cavidad Pulpar/microbiología , Cavidad Pulpar/patología , Tejido de Granulación/diagnóstico por imagen , Tejido de Granulación/patología , Macaca fascicularis , Necrosis , Enfermedades Periapicales/diagnóstico por imagen , Enfermedades Periapicales/patología , Granuloma Periapical/diagnóstico por imagen , Granuloma Periapical/etiología , Granuloma Periapical/patología , Tejido Periapical/irrigación sanguínea , Tejido Periapical/diagnóstico por imagen , Tejido Periapical/patología , Quiste Radicular/diagnóstico por imagen , Quiste Radicular/etiología , Quiste Radicular/patología , Radiografía , Obturación del Conducto Radicular , Cemento de Óxido de Zinc-EugenolRESUMEN
The purpose of the present investigation was to study cell colonization of and tissue formation on denuded (anorganic) cementum surfaces as well as denuded demineralized cementum surfaces. The most conspicuous finding was the distinctly different pattern of cell colonization and subsequent tissue formation on etched and non-etched denuded cementum surfaces. Non-etched cementum surfaces displayed a limited number of resorbing cells and resorption lacunae, while etched cementum surfaces displayed an abundance of fibroblast-like cells in varying stages of activity in a meshwork of fibres, probably collagenous. These fibres were organized in a layer parallel to the root surface. This appearance of a fibrous capsule-like structure has previously been associated with periodontal healing with a non-functional repair-tissue. It may be concluded, based on the present results that, a cementum surface in which collagen fibers have been exposed presents a suitable surface for colonization by mesenchymal cells. However, if collagen fibers are not exposed in the cementum surface leaving mineralized surface, mesenchymal cells appear not to be able to attach.