###### Abstract  
(1) Background: This article focuses on examining components affecting the overbite, overjet, and the effect of palate surgery on craniofacial morphology with a concomitant cleft lip fusion scar, and a comparison of patients who had only a cleft lip fusion scar. Patients with unilateral cleft lip (UCL) and patients with unilateral cleft lip and palate (UCLP) were included in the study. We aimed to find if cephalometric parameters were significantly different in these groups. (2) Material and methods: The study group consisted of a lateral cranial radiograph of patients with UCLP (n = 30) and UCL (n = 30). Cephalometric radiographs were saved electronically, and cephalometric analysis was performed using a computer program. (3) Results: We observed that a statistically significant higher degree of maxillary prognathism occurred in the UCLP than in the UCLP. We observed the anterior position of the upper lip in relation to E-line in patients with cleft lip. (4) Conclusions: The results present the effect of cleft palate surgery on further forward growth of the maxilla. There was a decreased ANB angle present in the skeletal class II in patients with UCL and UCLP. The SNB angle was not increased, and the reverse overjet was due to the rectrolination of the upper incisors and protruded lower incisors.  
cleft lip; cleft lip and palate; cephalometric measurements; orthodontics +
Footnote †: journal: Medical  
researchers [9]. Authors from Sweden point out the occurrence of dental abnormalities, including infraocclusion of primary molars and transposition in patients with UCLP [10]. Another study, conducted in Italy, concerns the three-dimensional assessment of the jaw and palate of patients with UCLP. Attention is drawn to the reduced surface area and volume of the palate, the reduced intercanine width, and the insignificantly reduced intermidar dimension in the superior arch. Moreover, according to studies carried out in Finland, hypodontia of the lateral incisor in patients with UCLP delays the dental age [11].  
The authors decided to conduct this study because of the discrepancy in previous results from other researchers.  
It is widely believed that surgical treatment of cleft palate is the main cause of tissue scarring and the reason for reduced i.a. forward maxilla dimension [12]. This is also supported by studies conducted on patients of Caucasian origin with UCLP [13] and studies by [PERSON] and coauthors [14]. This is contradicted by the results of other authors who did not present reduced maxilla growth in patients with only cleft palate fusion [15]. Moreover, patients with unoperated cleft palate demonstrate reduced maxillary length and retruded maxillary position relative to the cranial base [16,17].  
Further conflicting reports concern the substrate of the reverse overbite in operated UCLP patients. Some studies report anterior growth of the mandible as the cause of reverse overjet [18], while other authors report that individuals with cleft lip and palate had a significantly shorter maxillary length [19].  
We aimed to perform a cephalometric analysis in patients with cleft lip and with cleft lip and palate. The article focuses mainly on examining components affecting the overbite, overjet, and the effect of palate surgery on craniofacial morphology with a concomitant cleft lip fusion scar and a comparison for patients who had only a cleft lip fusion scar. Patients with UCLP and patients with UCLP were included in the study. Both groups were patients treated with surgery, which included cleft lip repair and cleft lip and palate repair, respectively.  
The following statements were made as the research hypothesis:  
1. SNA angle is smaller in UCLP patients than in UCL patients.
2. SNB angle reaches a similar value in patients with UCLP and UCL.
3. U1 to NA (mm) is smaller in UCLP patients than UCL patients.
4. Eversion of the upper lip is observed in UCL patients.