Résumé
BACKGROUND: Miniscrews have been widely used as "absolute anchorage" in orthodontic treatment, but high shedding rate has been a major flaw. Factors associated with the miniscrew stability mainly include its own factors, surrounding inflammation, implant method, angle, position and loading time of miniscrews. OBJECTIVE: To review the factors affecting the stability of miniscrews reported at home and abroad in recent years.METHODS: The first author searched CNKI and PubMed using computer for relevant articles published in recent 4 years, and the keywords were "miniscrews, stability, orthodontic anchorage" in Chinese and English, respectively. RESULTS AND CONCLUSION: A total of 52 articles were included. The surface modification of miniscrews effectively enhances bone binding capacity, and promotes bone regeneration, thereby improving the stability of miniscrews. The morphology, implanted angle and mode, bone density and load timing of miniscrews are closely related to the stability of miniscrews. Meanwhile, we should avoid damage to the root, nerves, blood vessels and maxillary sinus, and focus on the maintenance of postoperative healing.
Résumé
BACKGROUND: Miniscrews have been widely used as "absolute anchorage" in orthodontic treatment, but high shedding rate has been a major flaw. Factors associated with the miniscrew stability mainly include its own factors, surrounding inflammation, implant method, angle, position and loading time of miniscrews. OBJECTIVE: To review the factors affecting the stability of miniscrews reported at home and abroad in recent years.METHODS: The first author searched CNKI and PubMed using computer for relevant articles published in recent 4 years, and the keywords were "miniscrews, stability, orthodontic anchorage" in Chinese and English, respectively. RESULTS AND CONCLUSION: A total of 52 articles were included. The surface modification of miniscrews effectively enhances bone binding capacity, and promotes bone regeneration, thereby improving the stability of miniscrews. The morphology, implanted angle and mode, bone density and load timing of miniscrews are closely related to the stability of miniscrews. Meanwhile, we should avoid damage to the root, nerves, blood vessels and maxillary sinus, and focus on the maintenance of postoperative healing.