In recent years, various bone-anchored maxillary protraction (BAMP) methods have been developed to treat developing Class III. The most important factor influencing the success of bone anchorage in orthodontics is mini-implant stability. This prospective study was conducted to assess the success rate of miniscrew anchorage for MAMP in patients with developing maxillary retrusion. In this study, twenty patients with maxillary hypoplasia without clefts or craniofacial abnormalities (11.4 ± 1.3 years; range, 9.5-13.2 years) were enrolled. A hybrid hyrax expander with miniscrew support was given to each participant, and it was activated for nine weeks using the Alt-RAMEC protocol. Each case included a miniscrew-anchored mandibular bar that served as an attachment for 200 g full-time Class III elastics. When a positive overjet was achieved, maxillary protraction was stopped. The same operator installed 80 mini-screws in total (40 maxilla and 40 mandible). Fisher's exact test was used to analyze the miniscrew success rate for gender and insertion site at the 5% level of significance. In every instance, maxillary protraction was accomplished in 12.2 ± 2.1 months. Gender and insertion place did not significantly correlate with miniscrew failure (P > 0.05). The mandibular interradicular screws had an 87.5% success rate, while the palatal screws had a 97.5% success rate. Miniscrew skeletal anchoring works well for BAMP. Mandibular interradicular screws were less successful than palatal mini-screws, however, the difference was not statistically significant.
