Cuerpo extraño en el seno maxilar. Cierre quirúrgico por la técnica de bolsillo palatino / Foreign body in the maxillary sinus. Surgical closure using the palatal pocket technique

Objetivo: presentar el caso de un paciente con una comunicación bucosinusal crónica y su resolución quirúrgica mediante la técnica de bolsillo palatino. Métodos: El paciente concurre a la consulta manifestando pasaje de líquido de cavidad bucal a fosa nasal y dolor en la zona. Al examen intraoral, se observa la presencia de una reconstrucción protésica; y la tomografía computada multislice, revela la presencia de una solución de continuidad sobre el proceso alveolar residual a nivel del segundo premolar superior derecho. Se advierte en su interior la presencia de un cuerpo extraño de características y forma difícil de precisar. En el preoperatorio se realizaron lavajes a través de la comunicación con iodopovidona. Bajo anestesia general se realizó la intervención quirúrgica para el retiro del citado cuerpo extraño y cierre plástico de la comunicación mediante la técnica del bolsillo palatino. Resultados y Conclusión: Esta técnica asegura un cierre hermético de la comunicación y evita la reapertura de la lesión. Esto seconfirmó durante los controles posoperatorios.

[Isolated neurofibroma of oral cavity. An unusual manifestation case report .] / Neurofibroma Solitario Intrabucal. Reporte de un caso de manifestación poco frecuente.

Introduction: Neurofibroma (NF) is a benign tumor originated from neuronal cells, and can occur alone or multiple. Its manifestation within the oral cavity is rare, with a wide age range of appearance. This tumor occurs in a sessile-based nodular form, with slow growth and variable size. Objective: The purpose of this work is to present a clinical case of a solitary neurofibroma, of rare manifestation, in the oral mucosa. Methodology: an 86-year-old male patient attends the dental office with a right side facial asymmetry, and without pain. At the time of patient inspection, a nodular lesion with a sessile base, mobile, approximately 5cm long and 3cm wide, is observed. The planned treatment consisted of the complete surgical removal of the tumor mass. The study of pathological anatomy reveals that it is a solitary neurofibroma. Conclusion: In the case presented in this work, it was the correct surgical intervention and the antomopathological study of the operative piece, which made a definitive diagnosis of the lesion.

Introducción: El Neurofibroma (NF) es un tumor benigno que se origina a partir de las células neuronales, pudiendo presentarse en forma solitaria o múltiple. Su manifestación dentro de la cavidad bucal es poco frecuente, con un rango etario amplio de aparición. Se presenta de forma nodular de base sésil, de crecimiento lento y tamaño variable. Objetivo: El propósito de este trabajo es presentar un caso clínico de un neurofibroma solitario, de manifestación poco frecuente, con asiento en la cavidad bucal. Métodología: Metodología: Se analiza el caso de un paciente de sexo masculino de 86 años de edad, que concurre a la consulta con una asimetría facial del lado derecho sin sintomatología dolorosa. A la inspección se observa una lesión nodular de base sésil, móvil, de aproximadamente 5cm de largo por 3cm de ancho. Como tratamiento se decide realizar la extirpación quirúrgica completa de la masa tumoral. El estudio de anatomía patológica, revela que se trata de un Neurofibroma solitario. Conclusión: En el caso que se presenta en este trabajo, fue la correcta intervención quirúrgica y el estudio antomopatológico de la pieza operatoria, lo que posibilitó arribar a un diagnóstico definitivo de la lesión.

Injerto de matriz ósea en partículas asociado a plasma rico en plaquetas (PRP): estudio experimental / Bone matrix and platelet rich plasma (PRP) grafting: an experimental study

Los injertos o sustitutos óseos se utilizan con el fin de solucionar situaciones de déficit en el hueso, aunque aún existen controversias sobre los mecanismos de osteoinducción que estos rellenos promueven dentro de los tejidos. La combinación con plasma rico en plaquetas (PRP) podría aumentar la capacidad de reparación ósea. Objetivo: estudiar el efecto biológico (biocompatibilidad y osteoinducción) de la matriz ósea de la Universidad Nacional de Córdoba (MO-UNC) y el plasma rico en plaquetas (PRP). Métodos: se utilizaron 30 ratas Wistar anestesiadas con ketamina-xilazina. En 4 sitios del tejido celular subcutáneo de la región dorsal se implantaron tubos de silicona conteniendo los materiales experimentales: MO (partículas de MO-UNC), PRP, MO+PRP (partículas de MO embebidas en PRP), GC (Controles, sin relleno). Se tomaron biopsias de los sitios de implante a los 30 y 60 días poscirugía y se obtuvieron cortes histológicos para analizar la biocompatibilidad y la neoformación ósea alrededor de los materiales implantados. Resultados: si bien en ninguno de los grupos se identificó tejido óseo neoformado, en el grupo MO+PRP a 30 días se constató un aumento del número de cpailares neoformados alrededor de las partículas. A los 60 días, las partículas de MO-UNC mostraron áreas lacunares compatibles con actividad resorsiva. En este estudio, las partículas de MO-UNC se comportaron como injertos biocompatibles, siendo progresivamente resorbidas en el organismo de los animales. Se confirmó un efecto angiogénico del PRP...

Particulate bone matrix usage for alveolar bone conservation. A histomorphometric study.

UNLABELLED: Different filling materials have been used in an attempt to repair bone loss situations. OBJECTIVE: The present study aimed to examine the effect of a bone matrix in post - extraction remodelling of the alveolar bone, and to perform a histomorphometric analysis of the residual alveolar ridges in Wistar rats. MATERIAL AND METHODS: Both rat first lower molars were extracted and the right alveoli were filled with particles of a bone matrix with mineral components (MO - UNC) (experimental group, EG). The left alveoli were used as a control group (CG). The animals were sacrificed at 0 hr., 15, 30 and 60 days after extraction, and the samples were processed. Histological sections were made at the level of the mesial alveolus of the first lower molar. Repair of the alveoli was histologically evaluated and a histomorphometric study of total alveolar volume (TAV), height of the buccal plate (Bh), height of the lingual plate (Lh) and percentage of osseointegration (OI) of the particles was performed to compare the residual ridges of CG with those of the EG. Statistical analysis of the data was performed. RESULTS: In the cases of the experimental group, newly - formed bone tissue was identified around the MO - UNC particles (osseointegration). Histomorphometric data indicate that, at 60 days post - extraction, TAV was significantly greater for EG when compared with CG (p <0.05) and the percentage of osseointegration of the particles increased as a function of time (57.6 %, 90.5% y 95.5%, for EG at 15, 30 y 60 days respectively). CONCLUSIONS: The bone matrix (MO - UNC) evaluated in this study is an osteoconductive material that prevents the collapse of post - extraction alveolar bone.

Particulate bone matrix usage for alveolar bone conservation. A histomorphometric study / Particulate bone matrix usage for alveolar bone conservation. A histomorphometric study.

UNLABELLED: Different filling materials have been used in an attempt to repair bone loss situations. OBJECTIVE: The present study aimed to examine the effect of a bone matrix in post - extraction remodelling of the alveolar bone, and to perform a histomorphometric analysis of the residual alveolar ridges in Wistar rats. MATERIAL AND METHODS: Both rat first lower molars were extracted and the right alveoli were filled with particles of a bone matrix with mineral components (MO - UNC) (experimental group, EG). The left alveoli were used as a control group (CG). The animals were sacrificed at 0 hr., 15, 30 and 60 days after extraction, and the samples were processed. Histological sections were made at the level of the mesial alveolus of the first lower molar. Repair of the alveoli was histologically evaluated and a histomorphometric study of total alveolar volume (TAV), height of the buccal plate (Bh), height of the lingual plate (Lh) and percentage of osseointegration (OI) of the particles was performed to compare the residual ridges of CG with those of the EG. Statistical analysis of the data was performed. RESULTS: In the cases of the experimental group, newly - formed bone tissue was identified around the MO - UNC particles (osseointegration). Histomorphometric data indicate that, at 60 days post - extraction, TAV was significantly greater for EG when compared with CG (p <0.05) and the percentage of osseointegration of the particles increased as a function of time (57.6

, for EG at 15, 30 y 60 days respectively). CONCLUSIONS: The bone matrix (MO - UNC) evaluated in this study is an osteoconductive material that prevents the collapse of post - extraction alveolar bone.

Particulate bone matrix usage for alveolar bone conservation. A histomorphometric study. / Particulate bone matrix usage for alveolar bone conservation. A histomorphometric study.

UNLABELLED: Different filling materials have been used in an attempt to repair bone loss situations. OBJECTIVE: The present study aimed to examine the effect of a bone matrix in post - extraction remodelling of the alveolar bone, and to perform a histomorphometric analysis of the residual alveolar ridges in Wistar rats. MATERIAL AND METHODS: Both rat first lower molars were extracted and the right alveoli were filled with particles of a bone matrix with mineral components (MO - UNC) (experimental group, EG). The left alveoli were used as a control group (CG). The animals were sacrificed at 0 hr., 15, 30 and 60 days after extraction, and the samples were processed. Histological sections were made at the level of the mesial alveolus of the first lower molar. Repair of the alveoli was histologically evaluated and a histomorphometric study of total alveolar volume (TAV), height of the buccal plate (Bh), height of the lingual plate (Lh) and percentage of osseointegration (OI) of the particles was performed to compare the residual ridges of CG with those of the EG. Statistical analysis of the data was performed. RESULTS: In the cases of the experimental group, newly - formed bone tissue was identified around the MO - UNC particles (osseointegration). Histomorphometric data indicate that, at 60 days post - extraction, TAV was significantly greater for EG when compared with CG (p <0.05) and the percentage of osseointegration of the particles increased as a function of time (57.6

, 90.5

y 95.5

, for EG at 15, 30 y 60 days respectively). CONCLUSIONS: The bone matrix (MO - UNC) evaluated in this study is an osteoconductive material that prevents the collapse of post - extraction alveolar bone.

Bone substitute in the repair of the post-extraction alveolus.

In recent years there has been increasing interest in the choice of the best material for bone substitutes. Experimental models enable estimation of biological potential, efficacy and safety of a biomaterial before its clinical application. The aim of this study was to evaluate the response of a bone substitute, UNC bone matrix powder (MOeP-UNC), for repairing the post-extraction alveolus in Wistar rats. Rats' first lower molars were extracted. The right alveoli were filled with MOeP-UNC hydrated with physiological saline (Experimental Group, EG), and the left alveoli were used as Control Group (CG). Thirty days after extraction, the animals were killed and the samples processed. Histological sections were made in vestibular-lingual direction at the level of the mesial alveolus of the first inferior molar (Guglielmotti et al. J. Oral Maxillofac. Surg. 1985;43(5):359-364). Repair of the alveoli at 30 days after extraction was evaluated histologically. Repair of the alveolus was optimum in the control group at 30 days, and the EG showed presence of MOeP-UNC particles in close contact with newly formed bone tissue (osseointegration). In the experimental model used, at 30 days post-surgery, the MOeP-UNC particles integrate compatibly with newly formed bone tissue.

Bone substitute in the repair of the post-extraction alveolus

In recent years there has been increasing interest in the choice of the best material for bone substitutes. Experimental models enable estimation of biological potential, efficacy and safety of a biomaterial before its clinical application. The aim of this study was to evaluate the response of a bone substitute, UNC bone matrix powder (MOeP-UNC), for repairing the postextraction alveolus in Wistar rats. Rats' first lower molars were extracted. The right alveoli were filled with MOeP-UNC hydrated with physiological saline (Experimental Group, EG), and the left alveoli were used as Control Group (CG). Thirty days after extraction, the animals were killed and the samples processed. Histological sections were made in vestibular- lingual direction at the level of the mesial alveolus of the first inferior molar (Guglielmotti et al. J. Oral Maxillofac. Surg. 1985;43(5):359-364). Repair of the alveoli at 30 days after extraction was evaluated histologically. Repair of the alveolus was optimum in the control group at 30 days, and the EG showed presence of MOeP-UNC particles in close contact with newly formed bone tissue (osseointegration). In the experimental model used, at 30 days post-surgery, the MOeP-UNC particles integrate compatibly with newly formed bone tissue.

En los ultimos anos se ha incrementado el interes por la eleccion del material mas adecuado como sustituto oseo. Los modelos experimentales permiten estimar el potencial biologico, la eficacia y seguridad de un biomaterial, previo a su aplicacion clinica. El objetivo del presente estudio fue evaluar la respuesta de un sustituto oseo, matriz osea-UNC en polvo (MOeP-UNC), en la reparacion alveolar post-exodoncia en ratas Wistar. Se realizo la exodoncia de los primeros molares inferiores. En los alveolos derechos se coloco MOeP-UNC hidratada con solucion fisiologica (Grupo Experimental, GE). Los alveolos izquierdos, fueron utilizados como Grupo Control (GC). A los 30 dias post-exodoncia los animales fueron sacrificados y las muestras obtenidas se procesaron, se realizaron cortes histologicos en sentido vestibulo-lingual a la altura del alveolo mesial del primer molar inferior (Guglielmotti et al. J Oral Maxillofac Surg. 1985;43(5):359-364). Se realizo la evaluacion histologica de la reparacion de los alveolos a los 30 dias post cirugia. El grupo control presento una optima reparacion alveolar a los 30 dias y en el GE se evidencio la presencia de las particulas de MOeP-UNC en intimo contacto con el tejido oseo neoformado (oseointegracion). En el modelo experimental utilizado, a los 30 dias post-cirugia las particulas MOePUNC se integran de manera compatible con el tejido oseo neoformado.

Effect of platelet-rich plasma on the peri-implant bone response: an experimental study.

Platelet-rich plasma (PRP) is used as a source of growth factors to stimulate and accelerate bone formation and soft tissue healing. The use of PRP in bone regeneration, both around dental implants and in periodontic treatments, has become particularly appealing. The aim of this study was to evaluate the effect of PRP in an experimental model of osteogenesis around laminar implants. Fifteen male Wistar rats, weighing 90 +/- 10 g, were used in this study. One milliliter of blood was obtained from each animal by intracardiac puncture and transferred into Eppendorf tubes containing 10% sodium citrate. The tubes were centrifuged at 1500 rpm for 15 minutes and PRP was prepared. The laminar test was used to evaluate the bone peri-implant response. PRP and a titanium laminar implant were introduced into the right tibia (Ti/PRP group), whereas the left tibia (control) received only a laminar implant (Ti group). Thirty days postimplantation, the tibiae were resected, radiographed, and processed for embedding in acrylic resin. Ground sections (50 microm) were stained with toluidine blue. The peri-implant bone volume was evaluated histomorphometrically. Statistical analysis of the data was performed. The amount of newly formed bone in the Ti/PRP group (30 +/- 7 cm) was significantly greater than in the Ti group (16 +/- 3 cm). A greater volume of peri-implant bone was observed when PRP was used in the laminar implant test model.