OBJECTIVES: This study evaluated maxillary growth and dental arch relationships at 5 and 10 years of age in patients with unilateral cleft lip and palate (UCLP) who underwent early cleft lip and palate surgery. METHODS: 28 patients with UCLP who underwent cleft lip surgery in neonatal age and cleft palate surgery at average age of 7 months without orthodontic treatment (intervention group) were measured for intercanine and intermolar distances and for dental arch length. These measurements were compared with those of 30 healthy participants in a control group. Dental arch relationships in the intervention group were evaluated by 5-YO index at 5 years and the GOSLON Yardstick score at 10 years of patients' age. RESULTS: Patients in the intervention group had significantly shorter mean intercanine distance and arch length than control patients at both 5 and 10 years of age (p<.001 for all). There were no significant differences in intermolar distance at both 5 (p = .945) and 10 years (p = .105) of patients' age. The average 5YO index increased from 2.46 to an average GOSLON 10-year score of 2.89 in intervention group. CONCLUSION: Intercanine distance and dental arch length of patients with UCLP are significantly reduced at 5 and 10 years after early cleft lip and palate surgeries compared to the healthy population. Dental arch relationships at 5 and 10 years of patients with UCLP show comparable outcomes to those reported by other cleft centers. CLINICAL SIGNIFICANCE: This study evaluates maxillary growth in UCLP patients 5 and 10 years of age who underwent early primary lip and palate surgery.

Cleft Center of the University Hospital Brno Brno Czech Republic

Clinic of Dentistry St Anne's University Hospital Brno Pekarska 53 Brno 656 91 Czech Republic

Department of Burns and Plastic Surgery University Hospital Brno Jihlavska 20 Brno 62500 Czech Republic

Department of Pediatric Surgery Orthopedics and Traumatology University Hospital Brno Cernopolni 9 Brno 613 00 Czech Republic

Faculty of Mechanical Engineering Institute of Solid Mechanics Mechatronics and Biomechanics Brno University of Technology Technicka 2896 2 Brno 616 69 Czech Republic

Faculty of Medicine Department of Anatomy Masaryk University Kamenice 126 3 Brno 625 00 Czech Republic

Faculty of Medicine Masaryk University Brno Czech Republic

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