TY - JOUR
T1 - Improvement of masticatory kinematic parameters after correction of unilateral posterior crossbite
T2 - Reasons for functional retention
AU - Piancino, Maria Grazia
AU - Cordero-Ricardo, Maria
AU - Cannavale, Rosangela
AU - Vallelonga, Teresa
AU - Garagiola, Umberto
AU - Merlo, Andrea
PY - 2017/11/1
Y1 - 2017/11/1
N2 - Objective: To evaluate reverse-sequencing chewing cycles (RSCC) and their kinematic parameters on both sides before and after correction with the Function Generating Bite (FGB) appliance. Materials and Methods: Forty-seven patients, 8.3 6 1.1 (mean 6 SD) years of age, with unilateral posterior crossbite (35 on the right side, 12 on the left side) and 18 age-matched controls (9.1 6 0.8 years) were selected for the study from the orthodontic division of the University of Turin, Italy. The crossbite was corrected in all patients using FGB, and mandibular motion was recorded with a kinesiograph K-7 (Myotronics, Tukwila, Wash), during chewing on both sides of a soft and a hard bolus before and after correction. Results: After correction, the percentage of RSCC significantly decreased for soft and hard (P , .001) boluses and fell within the normal range for 75% of the patients. The indices of the chewing pattern (closure angle, axis, maximum lateral excursion) significantly improved (P , .001), becoming symmetric between sides. Conclusions: The results of this study showed that the functional appliance, FGB, was able to lower the percentage of RSCC significantly, bringing them back to the normal range in 75% of cases, and to improve the kinematic parameters that become symmetric between sides.
AB - Objective: To evaluate reverse-sequencing chewing cycles (RSCC) and their kinematic parameters on both sides before and after correction with the Function Generating Bite (FGB) appliance. Materials and Methods: Forty-seven patients, 8.3 6 1.1 (mean 6 SD) years of age, with unilateral posterior crossbite (35 on the right side, 12 on the left side) and 18 age-matched controls (9.1 6 0.8 years) were selected for the study from the orthodontic division of the University of Turin, Italy. The crossbite was corrected in all patients using FGB, and mandibular motion was recorded with a kinesiograph K-7 (Myotronics, Tukwila, Wash), during chewing on both sides of a soft and a hard bolus before and after correction. Results: After correction, the percentage of RSCC significantly decreased for soft and hard (P , .001) boluses and fell within the normal range for 75% of the patients. The indices of the chewing pattern (closure angle, axis, maximum lateral excursion) significantly improved (P , .001), becoming symmetric between sides. Conclusions: The results of this study showed that the functional appliance, FGB, was able to lower the percentage of RSCC significantly, bringing them back to the normal range in 75% of cases, and to improve the kinematic parameters that become symmetric between sides.
KW - Chewing cycle
KW - Chewing pattern
KW - Crossbite
KW - Interceptive orthodontics
KW - Malocclusion
KW - Mastication
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U2 - 10.2319/020917-98.1
DO - 10.2319/020917-98.1
M3 - Article
AN - SCOPUS:85034587808
VL - 87
SP - 871
EP - 877
JO - Angle Orthodontist
JF - Angle Orthodontist
SN - 0003-3219
IS - 6
ER -