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  • Title: [Clinical application of miniscrew implant for maximum anchorage cases].
    Author: Xun CL, Zeng XL, Wang X.
    Journal: Zhonghua Kou Qiang Yi Xue Za Zhi; 2004 Nov; 39(6):505-8. PubMed ID: 15854326.
    Abstract:
    OBJECTIVE: The purpose of this study was to evaluate the efficiency of the self-drilling miniscrew implant for maximum anchorage cases. METHODS: The study comprised 5 patients whose ages ranged from 14 to 31 years. All patients presented with. Class II skeletal pattern, maxillary protrusion or bimaxillary protrusion. Maximum molar anchorage and first premolar extraction were required. In the stage of anterior teeth retraction, self-drilling miniscrew implants were inserted into the buccal alveolar bone between maxillary second premolar and first molar. Sliding mechanics with 150 - 200 g force was used to retract anterior teeth. The cephalometric films before and after retraction were measured. RESULTS: Dental protrusion and facial profile were improved significantly in all patients. The edge of upper incisors was retracted 6.4 mm and anchor molar moved anteriorly 0.3 mm averagely. All miniscrew implants remained stable during treatment and peri-implant soft tissue remained healthy. CONCLUSIONS: Self-drilling minisrcew implant could be used as an efficient method for anchorage control and an alternative choice of extra-oral forces.
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