ABSTRACT
A instalação de implantes dentários na região posterior de maxila pode ser dificultada pela diminuição da quantidade óssea e pelo aumento do seio maxilar. Este artigo relata um caso clínico de instalação de implantes nessa região, com extensa reabsorção óssea e pneumatização do seio maxilar. O paciente foi submetido a um procedimento de elevação da membrana do seio utilizando um sistema de pressão hidrodinâmico, seguido pelo preenchimento com osso xenógeno liofilizado e instalação imediata de implantes. Após um período de seis meses de cicatrização, verificou-se que esse sistema permitiu, de maneira segura e atraumática, a instalação de implantes dentários, preservando o espaço sinusal.
The placement of dental implants in the posterior maxilla may be impaired by the reduced bone quantity and increased maxillary sinus volume. This article reports a case of implant placement with large bone resorption and pneumatization of the maxillary sinus. The patient was submitted to a sinus lifting membrane procedure using a hydrodynamic pressure system followed by filling with lyophilized xenogeneic bone and immediate implant placement. After six months of healing, the clinical results demonstrated that this system provides safe and atraumatic dental implant placement while preserving sinus space.
Subject(s)
Humans , Male , Middle Aged , Bone Transplantation , Dental Implants , Sinus Floor AugmentationABSTRACT
Múltiples materiales se han utilizado en la reconstrucción ósea; la matriz ósea bovina ha sido ampliamente estudiada y aun existen investigaciones que identifican su capacidad de contribuir en la formación ósea. El objetivo de esta investigación fue establecer la reparación ósea en defectos críticos de calotas de perros rellenados con matriz ósea bovina inorgánica transportada con carboxi-metil-celulosa. Se diseñó un estudio experimental en 6 perros donde se realizaron 3 defectos de 8mm de diámetro en los parietales de cada animal; el defecto fue rellenado aleatoriamente con hueso autógeno particulado (grupo I), matriz ósea bovina inorgánica con suero fisiológico al 0,9 por ciento (grupo II) y matriz ósea bovina con carboxi-metil-celulosa (grupo III). Se realizó el sacrificio de los animales a la tercera y sexta semana momento en el que se realizaron los estudios radiográficos de los defectos tratados y los estudios histológicos de rutina con tinciones de hematoxilina-eosina. No se observó procesos infecciosos vinculados a los materiales injertados. En el grupo del hueso autógeno se observó una adecuada aposición ósea en la tercera y sexta semana junto a una relación correcta con la imagen radiográfica; en el grupo II se observó etapas de formación ósea y permanencia de los fragmentos de hueso injertado; en el grupo III se observó infiltrado inflamatorio en los dos periodos de sacrificio, abundante tejido conectivo y bajo nivel de formación ósea. Las radiografías de los grupos II y III mostraron signos de formación ósea que en la histología eran sólo remanentes del material injertado. Se concluye que la matriz ósea bovina inorgánica es compatible con el tejido óseo y que puede contribuir a la formación ósea aunque el empleo de la carboxi-metil-celulosa, como vehículo, podría obstaculizar la regeneración ósea.
In bone reconstruction has been used different bioamterials; bovine bone matrix has been studied and nowadays new research analyses the capacity for bone regeneration. The aim of this research was to evaluate the bone reparation in critical defects on skull of dog filled with inorganic bovine bone matrix carried by carboxi-methyl-celulose. Was design an experimental research with 6 dog; on parietal bone was realized a 8mm diameter defect with a trephine and the defect was filled by particle autogenous bone (group I), inorganic bovine bone matrix carried with saline solution (0,9 percent) (group II) and inorganic bovine bone matrix carried with carboxi-methyl-celulose. Was realized the sacrifice of animals in a third and sixth week and was performed the radiographic image and the histological study with hemaotoxilin-eusin in a routine technique. Non infection was observed in any of sample. In the autogenous bone graft was observed an adequately bone formation in the third and sixth week analyses and was related to radiographic image; for group II was observed some bone formation and presence of bovine bone particles and for group III was observed inflammatory cells for two period of analyses with a low level of bone formation. The radiographic analyses show sign of bone formation but histological analyses show only permanence of bovine bone particles confounding the radiograph results. Is conclude that bovine bone inorganic matrix in COMPATIBLE con bone tissue and can contributed to bone formation although the use of carboxi-methyl-celulose can be an obstacle for bone regeneration.
Subject(s)
Animals , Bone Transplantation , Bone Matrix/transplantation , Bone Regeneration/physiology , Cattle , DogsSubject(s)
Humans , Male , Adolescent , Adult , Female , Tooth, Impacted/surgery , Malocclusion/surgery , Osteotomy/methods , Guided Tissue Regeneration, Periodontal/methods , Bone Transplantation/methods , Molar/surgery , Tooth Eruption, Ectopic/surgery , Jaw/surgery , Oral Surgical Procedures , Orthodontic AppliancesABSTRACT
O objetivo do tratamento endodôntico é remover a causa da doença pulpar, limitando o efeito nos tecidos perirradiculares. A terapia endodôntica cirúrgica é o tratamento de escolha quando os dentes não respondem adequadamente ao tratamento convencional ou não podem ser tratados apropriadamente pela abordagem não-cirúrgica. Os autores apresentam um caso clínico em que a técnica de regeneração tecidual guiada (RTG) foi utilizada no tratamento de um defeito periapical largo e profundo, demonstrando uma completa regeneração óssea após cinco anos e seis meses de acompanhamento.
The objective of root canal treatment is to remove the cause or potencial cause of the pulp space disease in order to limit the effect on periradicular tissues. Surgical endodontic therapy is the treatment of choice when teeth have responded poorly to conventional treatment or when they cannot be treated appropriately by nonsurgical means. The authors present a case report in which the guided tissue regeneration technique was used in the treatment of a deep/large periapical defect, showing a complete healing after five years and six months.