Evaluation of the success rate of single- and dual-thread orthodontic miniscrews inserted in the palatal side of the maxillary tuberosity

Fukumoto, Takuma; Fukasawa, Shinichi; Yamada, Kunihiko; Nakajima, Ryo; Yamaguchi, Masaru

doi:10.1016/j.ejwf.2022.03.002

Cited by 1 publication

(2 citation statements)

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“…In contrast to the findings of this study, Fukumoto et al [ 34 ] exhibited comparable survival and bone-miniscrew contact (BMSC) rates in single- and dual-thread miniscrews placed on the palatal aspect of the maxillary tuberosity. Durrani et al [ 20 ] indicated no significant difference in failure rates between dual-thread and single-thread TADs.…”

Section: Discussioncontrasting

confidence: 99%

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Success rates of single-thread and double-thread orthodontic miniscrews in the maxillary arch

Merati,

Ghaffari,

Javid

et al. 2024

BMC Oral Health

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Aim There is limited research on the clinical performance of double-thread orthodontic miniscrews. This study aimed to compare the stability of double-thread and single-thread orthodontic miniscrews and identify the potential associations between patient-related and location-related factors with miniscrew stability. Methods This retrospective cohort study involved 90 orthodontic miniscrews (45 single-thread, 45 double-thread) with identical dimensions (8 mm length, 1.6 mm diameter). The screws were inserted in various locations within the upper jaw of 83 patients (54 females, 29 males; mean age = 15.1 ± 2.4 years). Failure was defined as excessive mobility or loss of miniscrew after placement. The data recorded were patient age, gender, insertion site, side of insertion (buccal or lingual), duration of force application, and failure occurrence. Results The overall success rate within the sample was 92.2%. Double-thread miniscrews exhibited a significantly higher success rate than single-thread miniscrews (P = 0.049), with 97.8% and 86.7% success rates, respectively. Gender, age, insertion location, and side of insertion did not show significant associations with failure (P > 0.05). Log-rank analysis revealed a significant difference between the two groups (P = 0.046), indicating a higher probability of survival for the double-thread design. Conclusions The overall success rate of orthodontic miniscrews was high in the present sample. Double-thread miniscrews placed in various locations within the maxillary arch demonstrated superior stability and survival rates compared to their single-thread counterparts. Therefore, double-thread miniscrews may be preferred when bone quality is inadequate, such as in young patients.

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Section: Discussioncontrasting

confidence: 99%

“…In this study, the clinical success rate did not significantly differ between female (94.7%) and male (87.9%) subjects, which aligns with findings from most studies in the literature [ 11 , 32 , 34 – 36 ]. However, Manni et al [ 6 ] reported a better success rate in males (88.1%) than in females (76.4%).…”

Section: Discussionsupporting

confidence: 91%