OBJECTIVE: To investigate by behavioral methods the relationship between emotional stress and pain during experimental tooth movement in rats. MATERIALS AND METHODS: Sixteen male Sprague-Dawley rats (210 to 250 g) were divided into two groups. The experimental group was treated with an active Ti-Ni appliance, and the control group received a passive appliance. A force of 20 gf was delivered by the active appliance between the maxillary first and second molars for 3 days. During this period the rat's behavior was evaluated eight times by means of open-field test and resistance-to-capture test. The specific parameters of animal activity were facial grooming, rearing, and locomotor activity, movement into the center of the open field, and response to capture. RESULTS: Parameters related to stress and pain were higher in the group carrying active appliance, compared to the group with a passive appliance. Statistically significant differences in stress-related behavior between control and experimental groups were found 8 hours after placing the appliance and were most evident on the second day. Pain-related behavior was significantly greater in the experimental group than in the control group at 24 hours. CONCLUSIONS: The increase in emotional stress evoked by orthodontic tooth movement may precede the appearance of periodontal pain.
OBJECTIVE: To investigate by behavioral methods the relationship between emotional stress and pain during experimental tooth movement in rats. MATERIALS AND METHODS: Sixteen male Sprague-Dawley rats (210 to 250 g) were divided into two groups. The experimental group was treated with an active Ti-Ni appliance, and the control group received a passive appliance. A force of 20 gf was delivered by the active appliance between the maxillary first and second molars for 3 days. During this period the rat's behavior was evaluated eight times by means of open-field test and resistance-to-capture test. The specific parameters of animal activity were facial grooming, rearing, and locomotor activity, movement into the center of the open field, and response to capture. RESULTS: Parameters related to stress and pain were higher in the group carrying active appliance, compared to the group with a passive appliance. Statistically significant differences in stress-related behavior between control and experimental groups were found 8 hours after placing the appliance and were most evident on the second day. Pain-related behavior was significantly greater in the experimental group than in the control group at 24 hours. CONCLUSIONS: The increase in emotional stress evoked by orthodontic tooth movement may precede the appearance of periodontal pain.
Authors: Osmar A Cuoghi; Francielle Topolski; Lorraine P de Faria; Edilson Ervolino; Kelly R Micheletti; Yesselin M Miranda-Zamalloa; Ricardo Moresca; Alexandre Moro; Marcos R de Mendonça Journal: Angle Orthod Date: 2019-03-11 Impact factor: 2.079
Authors: Ana Paula Ribeiro Novaes; Maria José Alves da Rocha; Christie Ramos Andrade Leite-Panissi Journal: Angle Orthod Date: 2010-01 Impact factor: 2.079