Cleft Lip and Palate
Daniela Garib; Raquel Silva Poletto; Thagid Yasmin Leal Almeida; Silvia Maria Graziadei; Guilherme Janson
Abstract
Aim: This study compared the prevalence of tooth agenesis out of the cleft area in patients with complete bilateral cleft lip and palate (BCLP) with and without agenesis of maxillary permanent lateral incisors.Methods: Tooth agenesis was evaluated in panoramic radiographs taken between 7 and 11 years ...
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Aim: This study compared the prevalence of tooth agenesis out of the cleft area in patients with complete bilateral cleft lip and palate (BCLP) with and without agenesis of maxillary permanent lateral incisors.Methods: Tooth agenesis was evaluated in panoramic radiographs taken between 7 and 11 years of age. Intergroup comparison of tooth agenesis frequency was performed using the chi-square test (P<0.05) and the odds ratio. A sample of 130 patients (87 male, 43 female) with non-syndromic bilateral cleft lip and palate was selected. Group P (n = 44) consisted of individuals with the presence of maxillary lateral incisors on the right and left sides; group UA (n = 40) comprised patients with unilateral agenesis of lateral incisors; group BA (n = 46) comprised patients with bilateral agenesis of lateral incisors. Intergroup comparison for frequency of tooth agenesis outside the cleft area was performed using Chi-square test (p-value <0.05 was considered significant) and the odds ratio (p<0.016).Results: The prevalence of dental agenesis out of the cleft area in groups P, UA, and BA was 31.8%, 32.5%, and 60.8%, respectively. Group BA showed a significantly greater prevalence of tooth agenesis compared with the UA and P groups. There was no significant difference in the odds ratio between any groups. The most common absent teeth were the maxillary second premolars followed by the mandibular second premolars for all groups.Conclusion: Patients with BCLP and bilateral agenesis of maxillary lateral incisors show an increased prevalence of other permanent teeth. This association demonstrates a genetic background of maxillary lateral incisor agenesis at the cleft area.
Tahura Etezadi; Fariba Esmaeilnia Shirvania; Atefe Saffarshahroudia
Abstract
Aim: the prevalence of maxillary missing lateral incisor (MMLI) is 1-2% which is responsible for 20% of all missing teeth. Increased knowledge of causes and clinical manifestations of cases with this situation can be helpful in their diagnosis and treatment planning. The aim of the present study was ...
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Aim: the prevalence of maxillary missing lateral incisor (MMLI) is 1-2% which is responsible for 20% of all missing teeth. Increased knowledge of causes and clinical manifestations of cases with this situation can be helpful in their diagnosis and treatment planning. The aim of the present study was to determine dental and skeletal features of patients with missing of maxillary lateral incisors. Materials and methods: The material consisted of pre-treatment dental casts and cephalograms of 26 patients (14 females and 12 males with average age of 17.5) with unilateral or bilateral MMLI. The following parameters were measured on the dental casts: the maxillary and mandibular intercanine width (ICW) and intermolar width (IMW), overjet, overbite, missing or anomalous of other teeth. Parameters that were measured on cephalogram including: SNA, SNB and ANB angle and Wits. The parameters were finally compared to a control group with normal occlusion by means of paired t-test. Results: Eight subjects out of 26 patients with MMLI had bilateral missing and from 18 subjects with unilateral missing, 66.67% (12 subjects) had lateral missing on the right side. MMLI was associated with other anomalous or congenital tooth absence in 12 subjects. In comparison with control group, the overjet was significantly lesser (p<0.05) and upper and lower ICW were smaller. Both ANB angle and Wits were significantly decreased in lateral missing group ((p<0.05).
Conclusion: Missing of maxillary lateral incisor was highly correlated with other tooth anomalies. Most of patient with this situation had skeletal and dental Class III tendency.