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Previous issue date: 2013-10-31 / The reduction that occurs in the alveolar dimensions after tooth extraction can compromise the patients aesthetics and function. Due to the events of alveolar healing with loss of a wall were not described. The present study was designed to evaluate the characteristics of bone healing in socket with loss of a wall and test the influence of immediate treatment with alloplastic graft material. The two incisors of the sample of sixteen male rabbits, weighing between 2.5 and 3 kg, with 120 days were extracted. One of the walls was mechanically removed from its buccal aspect of the alveolar ridge 5 mm (WL) and the other was preserved (PR). Half of the sample received alloplastic graft (beta tricalcium phosphate) in both regions tested and, the remaining eight animals received no graft. Occlusive sutures were performed on all sites. The animals were grouped according to the graft presence and evaluation period as follows: Group A - no graft evaluated in two weeks, Group B - no graft and evaluated in sixteen weeks groups C and D received graft and were evaluated in two and sixteen weeks, respectively. Evaluation was performed using microtomography and histomorphology. Group A showed little material radiodense within the socket. Histological analysis showed bone tissue formation process. Group B showed more spongy bone volume with differences between WL and PR (p < 0.05). Group C exhibited distinct behavior of group A in bone formation, increasing radiodense material inside the socket and no volume difference between WL and PR. Group D showed increased bone, statistically significant when compared to group B, for both regions, with no difference between the sides. Areas had bone tissue composition, fibrous tissue, and non- resorbed particles. The wall loss negatively affect the alveolar volume. The immediate placement of alloplastic graft allowed to reduce the contraction ridge with socket wall preserved and lost, and can be an option for treatment of bone loss during the extraction. The periosteum has limitations in the containment of the particles within the graft when the absence of alveolar bone wall. / Ap?s a exodontia ocorre redu??o das dimens?es ?sseas que pode vir a comprometer a est?tica e fun??o. Devido aos eventos de reparo alveolar com perda de uma parede n?o terem sido descritos o presente estudo prop?s-se avaliar as caracter?sticas do reparo de alv?olos com perda da parede vestibular e testar a influ?ncia do tratamento imediato com enxerto de material alopl?stico. Foram extra?dos os dois incisivos inferiores da amostra de dezesseis coelhos machos, com 120 dias, pesando entre 2,5 e 3kg. Um dos alv?olos teve sua parede vestibular mecanicamente removida a 5 mm da crista alveolar (WL) e a outra foi preservada (PR). Metade da amostra recebeu enxerto (beta fosfato tric?lcio) em ambas as regi?es testadas e os oito animais restantes n?o receberam enxerto. Suturas oclusivas foram realizadas em todos os alv?olos. Os animais foram agrupados de acordo com a presen?a de enxerto e per?odo de avalia??o, sendo o Grupo A - sem enxerto, avaliado em duas semanas, grupo B - sem enxerto e avaliado em dezesseis semanas, grupo C e D receberam enxerto e foram avaliados em duas e dezesseis semanas respectivamente. Avalia??o foi realizada atrav?s de microtomografia e histomorfologia. O grupo A apresentou pouco material radiodenso dentro do alv?olo. A an?lise histol?gica mostrou tecido ?sseo em processo de forma??o. Grupo B apresentou osso esponjoso com maior volume ?sseo havendo diferen?as entre WL e PR (p <0,05). Grupo C exibiu distinto comportamento do grupo A na forma??o ?ssea, com aumento de material radiodenso no interior do alv?olo e nenhuma diferen?a de volume entre WL e PR. O Grupo D demonstrou aumento de osso, estatisticamente significativo, quando comparado ao grupo B, para ambas regi?es, sem diferen?a entre os lados. As ?reas apresentavam composi??o de tecido ?sseo, tecido fibroso, e part?culas n?o-reabsorvidas. A perda de parede interferiu negativamente no volume alveolar final. A coloca??o imediata do enxerto alopl?stico foi capaz de reduzir a contra??o alveolar para locais com paredes alveolares preservadas e perdidas, podendo ser uma op??o para tratamento de perdas ?sseas durante o processo de exodontia. O peri?steo apresentou limita??o na conten??o das part?culas de enxerto no interior do alv?olo quando da aus?ncia de parede ?ssea.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/1234 |
| Date | 31 October 2013 |
| Creators | Os?rio, Leandro Berni |
| Contributors | Menezes, Luciane Macedo de |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Odontologia, PUCRS, BR, Faculdade de Odontologia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -8096554818733665164, 500, 600, 4673435736271820140 |
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