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Efeitos da fratura do processo condilar na simetria facial em ratos submetidos à desnutrição protéica / Effects of the condylar process fracture on facial symmetry in rats submitted to protein undernutrition
Rodrigues, Lucimar; Corrêa, Luciana; Luz, João Gualberto de Cerqueira.
  • Rodrigues, Lucimar; University of São Paulo. School of Dentistry. Department of Oral and Maxillofacial Surgery. Division of Maxillofacial Traumatology Postgraduate Program in Oral and Maxillofacial Surgery. Sao Paulo. BR
  • Corrêa, Luciana; University of São Paulo. School of Dentistry. Department of Stomatology. Division of General Pathology. Sao Paulo. BR
  • Luz, João Gualberto de Cerqueira; University of São Paulo. School of Dentistry. Department of Oral and Maxillofacial Surgery. Division of Maxillofacial Traumatology. Sao Paulo. BR
Acta cir. bras ; 26(2): 88-93, abr. 2011. ilus, tab
Article in English | LILACS | ID: lil-579633
ABSTRACT

PURPOSE:

To investigate the facial symmetry of rats submitted to experimental mandibular condyle fracture and with protein undernutrition (8 percent of protein) by means of cephalometric measurements.

METHODS:

Forty-five adult Wistar rats were distributed in three groups fracture group, submitted to condylar fracture with no changes in diet; undernourished fracture group, submitted to hypoproteic diet and condylar fracture; undernourished group, kept until the end of experiment, without condylar fracture. Displaced fractures of the right condyle were induced under general anesthesia. The specimens were submitted to axial radiographic incidence, and cephalometric mensurations were made using a computer system. The values obtained were subjected to statistical analyses among the groups and between the sides in each group.

RESULTS:

There was significative decrease of the values of serum proteins and albumin in the undernourished fracture group. There was deviation of the median line of the mandible relative to the median line of the maxilla, significative to undernutrition fracture group, as well as asymmetry of the maxilla and mandible, in special in the final period of experiment.

CONCLUSION:

The mandibular condyle fracture in rats with proteic undernutrition induced an asymmetry of the mandible, also leading to consequences in the maxilla.
RESUMO

OBJETIVO:

Investigar a simetria facial de ratos submetidos à fratura experimental de côndilo mandibular e com desnutrição protéica (8 por cento de proteína) por meio de mensurações cefalométricas.

MÉTODOS:

45 ratos Wistar adultos foram distribuídos em três grupos grupo fraturado, submetido a fratura condilar sem alteração na dieta; grupo fraturado desnutrido, submetido a dieta hipoprotéica e fratura condilar; grupo desnutrido, mantido até o final do experimento, sem fratura condilar. Fraturas com desvio foram feitas no côndilo direito com anestesia geral. Os espécimes foram submetidos à incidência radiográfica axial, e mensurações cefalométricas foram feitas por meio de um sistema de computador. Os valores obtidos foram submetidos a análises estatísticas entre os grupos e entre os lados em cada grupo.

RESULTADOS:

Houve redução significante nos valores de proteínas séricas e de albumina no grupo fraturado desnutrido. Houve desvio da linha média da mandíbula em relação à linha média da maxila, significativo no grupo fraturado desnutrido, assim como assimetria da maxila e da mandíbula, em especial no final do período experimental.

CONCLUSÃO:

A fratura do côndilo mandibular em ratos com desnutrição protéica induziu uma assimetria na mandíbula, também com consequências na maxila.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Rats / Mandibular Fractures Limits: Animals Language: English Journal: Acta cir. bras Journal subject: General Surgery / Procedimentos Cir£rgicos Operat¢rios Year: 2011 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Rats / Mandibular Fractures Limits: Animals Language: English Journal: Acta cir. bras Journal subject: General Surgery / Procedimentos Cir£rgicos Operat¢rios Year: 2011 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of São Paulo/BR