Patricia Martins Bueno1, Paulo Alceu Kiemle Trindade2, Laís Hollara Medeiros1, Mariana Mendes Silva1, Leandro Scomparin1, Michele Garcia-Usó3, Ivy Kiemle Trindade-Suedam4. 1. Postgraduate Program in Rehabilitation Sciences, Laboratory of Physiology, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, SP, Brazil. 2. Oral and Maxillofacial Surgeon, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, University of São Paulo, Bauru, SP, Brazil. 3. Professor Department of Biological Sciences, Discipline of Physiology, Ourinhos Dental School UNIFIO, Ourinhos, SP, Brazil. 4. Department of Biological Sciences, Bauru School of Dentistry and Laboratory of Physiology, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, SP, Brazil.
Abstract
OBJECTIVE: To evaluate the impact of orthognathic surgery on the masticatory system of individuals with repaired cleft lip and palate (CLP) by means of bite force (BF) assessment. MATERIAL AND METHODS: Forty individuals were prospectively divided into 2 groups: 1) Control group (CON): 20 individuals without CLP (10 males, 10 females, 23.7y±7.4), 2) Cleft lip and palate group (CLP): 20 individuals with complete CLP with indication for orthognathic surgery (OS) (11 males, 9 females, 23.6y±5.6; 10 unilateral CLP; 10 bilateral CLP). The BF was evaluated in the immediate preoperative period (PRE), 3 months postoperatively (POST3M) and 6 months postoperatively (POST6M), using a gnathodynamometer (IDDK Kratos, Cotia-SP, Brazil). RESULTS: The BF of the CLP group was significantly lower than that of the CON in all evaluated periods. The BF of individuals with CLP was significantly lower in POST3M compared to PRE. Also, a significant increase in BF was observed between POST3M and POST6M. Though not significant, the BF was increased in POST6M when compared to PRE. The BF of unilateral and bilateral CLP individuals were statistically similar. Males presented a BF almost twice as high as females. CONCLUSION: Cleft lip and palate negatively impacts BF. Although there was a tendency for BF values to increase 6 months after OS, it was still significantly reduced when compared to controls, not reaching normative values.
OBJECTIVE: To evaluate the impact of orthognathic surgery on the masticatory system of individuals with repaired cleft lip and palate (CLP) by means of bite force (BF) assessment. MATERIAL AND METHODS: Forty individuals were prospectively divided into 2 groups: 1) Control group (CON): 20 individuals without CLP (10 males, 10 females, 23.7y±7.4), 2) Cleft lip and palate group (CLP): 20 individuals with complete CLP with indication for orthognathic surgery (OS) (11 males, 9 females, 23.6y±5.6; 10 unilateral CLP; 10 bilateral CLP). The BF was evaluated in the immediate preoperative period (PRE), 3 months postoperatively (POST3M) and 6 months postoperatively (POST6M), using a gnathodynamometer (IDDK Kratos, Cotia-SP, Brazil). RESULTS: The BF of the CLP group was significantly lower than that of the CON in all evaluated periods. The BF of individuals with CLP was significantly lower in POST3M compared to PRE. Also, a significant increase in BF was observed between POST3M and POST6M. Though not significant, the BF was increased in POST6M when compared to PRE. The BF of unilateral and bilateral CLP individuals were statistically similar. Males presented a BF almost twice as high as females. CONCLUSION: Cleft lip and palate negatively impacts BF. Although there was a tendency for BF values to increase 6 months after OS, it was still significantly reduced when compared to controls, not reaching normative values.