The objective of the present study was to evaluate the dental arch relationships of children with complete unilateral cleft lip and palate (UCLP) as an early surgical repair outcome in the Northeastern part of Thailand. The study used a 5-year study model of 46 complete UCLP, non consecutive, patients whose primary repair had been performed at Khon Kaen University. The outcome of dental arch relationships was assessed using the 5-Year-Olds’ Index. Agreement of rating was assessed with weighted kappa statistics; both the intra- and inter-examiner agreements were high, indicating good reproducibility. The results indicated that the surgical outcome was graded as poor and very poor for 60% of patients and excellent, good, or fair for 40% of patients. This result was also poor compared with other overseas reports.

Keywords: Early treatment outcome, Dental arch relationships, Unilateral cleft lip and palate, 5-Year-Olds’ Index