Efeitos de diferentes tipos de osteotomia sobre a reparação óssea. Estudo histológico em cães
Effects of different kinds of osteotomy on osseous wound healing. Histological study in dogs
Okamoto, T.; Carvalho, A.C.P.; Saad-Neto, M.; Carvalho, P.S.P.
Rev. odontol. UNESP, vol.13, nÚnico, p.71-78, 1984
Resumo
O presente trabalho teve por objetivo estudar, em nível histológico, os efeitos da osteotomia sobre a reparação óssea. empregando-se 18 cães. Após incisão e deslocamento do retalho, foram preparadas duas cavidades, em ambos os lados da mandíbula: cavidade 2 - com alta rotação, sem resfriamento; cavidade 2 - com alta rotação, com resfriamento; cavidade 3 com baixa rotação. com resfriamento; cavidade 4 com cinzel, com pressão a martelo. Os animais foram sacrificados a 2 horas. 2, 10, 20 e 60 dias após o ato cirúrgico. Com exceção do primeiro período (2 horas) que teve apenas 2 cães. os demais foram constituidos de 4 para cada período. As peças obtidas sofreram o tratamento laboratorial de rotina para se obter lâminas coradas com hematoxilina e eosina, para o estudo histológico. Concluiu-se que na cavidade óssea preparada com baixa rotação com resfriamento, ocorreu atraso mais acentuado na reparação óssea; comparativamente, este reparo foi menos retardado na cavidade óssea preparada com broca sob alta rotação com resfriamento. Foram semelhantes a reparação das cavidades realizadas com broca sob alta rotação com resfriamento e com cinzel e martelo.
Palavras-chave
Reparo ósseo: osteotomia, instrumentos rotatórios, cinzel e martelo
Abstract
In order to study histologically the effects of different kinds of osteotomy, on osseous wound healing, eight teen dogs were used. After incision and flap reflection, two bone cavities were prepared on both sides of the mandible: cavily 1 - made with high-speed rotatory instrument without water coolant; cavity 2 - made with high-speed rotatory instrument with water coolant; cavity 3 - made with conventional speed rotatory instrument with water coolant; cavity 4 - made with chisel and surgical mallet. The animals were sacrificed at 2 hours, 2, 10, 20, and 60 postoperative days following surgeries. With the exception of the first period in which two dogs were used, the other periods had four animals each. The bane specimens were submitted to routine laboratorial procedures until obtaining pieces stained with hematoxylin and eosin. It was concluded that osseous wound healing was more delayed in cavity made with conventional speed rotatory instrument with water coolant; comparatively, this wound healing, was more delayed in cavity made with high-speed rotatory instrument with water coolant. Osseous wound healing observed in cavilies made with high-speed rotatory instrument with water coolant and with chiset and surgical mallet were quite similar.
Keywords
Osseous wound healing, osteotomy, rotatory instruments, chisel and surgical mallet
Referências
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2. BIRN, H. & WIHTHER, .I.E. - Manual of minor oral surgery. Copenhagen, Munksgard. 1977.
3. CARVALHO, P.S.P.; TANAKA, O.S.; NAKA.JJMA, T. & CARVALHO, A.C.P. - Técnicas exodônticas empregadas em 1.659 pacientes. Quinles., 5:3-17,1978.
4. COST/CH, E.R.; YOUNGBLOOD, P ..I. & WALDEN, .I.M. - A study of the effects of highspeed rotary instruments on bone repair in dogs. OraISurg., 17:563-71, 1964.
5. FISTER,.I. & GROSS, B.O. - A histologic evaluation of bone response to bur cutting with and wi-' thout water coolant. Oral Surg., 49: 105-11, 1980.
6. GINESTET, G.; PONS, .I.; PALFER-SOLLlER, M. & FREZIERES, H. - Atlas de lécnica operaIória. Cirurgia eSlomatolóf?,ica y maxilo facial. Buenos Aires, Ed. Mundi, 1967.
7. GRAZIANI, M. - Cirurgia buco-maxilo-facial. 6. ed. Rio de Janeiro, Guanabara Koogan, 1976.
8. HALL, R.M. - Facial, oral and reconslruclive surgery. Berlin, Springer-Verlag, 1973, v. 3.
9. HOLLAND, R.; TAKAYAMA, S. & RUSSO, M. - Avaliação histológica da reação pulpar ao 78 preparo de cavidade com turbina pneumática e refrigeração a água ou a ar. Rev. Ass. Paul. Cirur. Denl., 23:89-95,1969.
10. HORTON, .I.E.; TARPLEY .Ir., M.T. & WOOD, L.D. - The healing of surgical defects in alveolar bone produced with ultrasonic instrumentation, chisel, and rotary bur. Oral Surg., 39: 53646, 1975.
11. KRUGER, O.K. - Texlbook of oral surgery. SI. Louis, Mosby, 1974.
12. MORSE, A. - Formic acid-sodium citrate decalcification and butyl alcohol dehydratation of teeth and bone for seccioning in paraffin. J. denl. Res., 24: 143, 1945.
13. NIXON, K.C.; ADKINS, K.F. & KEYS, D.W. Histological evaluation of effects produced in alveolar bone following gingival incision whit and electro-surgical scalpel. J. Periodont., 46: 40-4, 1975.
14. RIES-CENTENO, G.A. - Cirurgia bucal. Buenos Aires, EI Ateneo, 1973.
15. SIMPSON, H.E. - Healing of surgical extraction wounds in macacus Rhesus monkeys. I. The effect of burns. J. oral Surg. Aneslh., 19: 3-9, 1961.
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