Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology · 2026
[Clinical study on bi-rooted primary canines].
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Xu Lin, Qiu Fenfang, Shu Lihong, Meng Shan, Cai Jing
Аннотация
OBJECTIVES: The incidence and clinical characteristics of bi-rooted primary canines were investigated by performing oral panoramic radiographs.
METHODS: A total of 100 976 oral panoramic radiograph of subjects aged 3-9 years old were collected, and the incidence and distribution of bi-rooted primary canines were observed and recorded. The obtained data were analyzed using SPSS 25.0 statistical software, and the literature on bi-rooted primary canine was reviewed to record patient's data.
RESULTS: The incidence of bi-rooted primary canines was 0.37‰ (37/100 976), of which 0.59‰ (32/54 276) occurred in males and 0.12‰ (5/46 700) in females. Statistically significant difference was observed between males and females (χ2=15.955, P=0.000). The number of bi-rooted primary canine in 37 children was mainly 1-2. Among them, 11 subjects (29.73%) had one bi-rooted primary canine, and 18 subjects (48.65%) had two bi-rooted primary canines. The tooth position distribution of 76 bi-rooted primary canines showed no significant difference between the left and right sides (χ2=1.316, P=0.251). However, significant difference was found between the upper and lower jaws (χ2=15.213, P=0.000) and between the unilateral and bilateral sides (χ2=6.083, P=0.014).
CONCLUSIONS: Bi-rooted primary canines are rare, mostly occur in 1-2 teeth, and are more common in males than females, in the upper jaw than in the lower jaw, and on both sides than on one side.
METHODS: A total of 100 976 oral panoramic radiograph of subjects aged 3-9 years old were collected, and the incidence and distribution of bi-rooted primary canines were observed and recorded. The obtained data were analyzed using SPSS 25.0 statistical software, and the literature on bi-rooted primary canine was reviewed to record patient's data.
RESULTS: The incidence of bi-rooted primary canines was 0.37‰ (37/100 976), of which 0.59‰ (32/54 276) occurred in males and 0.12‰ (5/46 700) in females. Statistically significant difference was observed between males and females (χ2=15.955, P=0.000). The number of bi-rooted primary canine in 37 children was mainly 1-2. Among them, 11 subjects (29.73%) had one bi-rooted primary canine, and 18 subjects (48.65%) had two bi-rooted primary canines. The tooth position distribution of 76 bi-rooted primary canines showed no significant difference between the left and right sides (χ2=1.316, P=0.251). However, significant difference was found between the upper and lower jaws (χ2=15.213, P=0.000) and between the unilateral and bilateral sides (χ2=6.083, P=0.014).
CONCLUSIONS: Bi-rooted primary canines are rare, mostly occur in 1-2 teeth, and are more common in males than females, in the upper jaw than in the lower jaw, and on both sides than on one side.