|Microscrew anchorage in skeletal anterior open-bite treatment|
|Xun, Chunlei1; Zeng, Xianglong1; Wang, Xing1|
|关键词||Orthodontic Anchorage Microscrew Anchorage|
|WOS标题词||Science & Technology|
|类目[WOS]||Dentistry, Oral Surgery & Medicine|
|研究领域[WOS]||Dentistry, Oral Surgery & Medicine|
|关键词[WOS]||MULTILOOP EDGEWISE ARCHWIRE ; CEPHALOMETRIC EVALUATION ; ABSOLUTE ANCHORAGE ; MOLARS ; MAGNETS ; SYSTEM|
Objective: To evaluate the effectiveness of miniscrew anchorage for intrusion of the posterior dentoalveolar region to correct skeletal open bite.
Materials and Methods: The study was comprised of 12 patients (aged 14.3 to 27.2 years; mean 18.7 years) with anterior open bites. All the patients presented a Class 11 skeletal pattern and excessive posterior growth. Self-drilling miniscrew implants were inserted into the posterior mid-palatal area and the buccal alveolar bone between the lower molars. A transpalatal and a lingual arch were used to maintain the molars on each side in order to avoid overrotation during intrusion. A force of 150 g was applied to the microscrews on each side to intrude the posterior teeth. Lateral cephalograms of all 12 patients were taken preintrusion and immediately after completion of the intrusion. The cephalometric films were measured and compared.
Results: The results showed that the anterior open bites in 12 patients were all corrected in a mean of 6.8 months. Overbite increased by a mean of 4.2 mm (P <.001), from -2.2 mm in preintrusion to 2.0 mm in postintrusion. The maxillary and mandibular first molars were intruded for an average of 1.8 mm (P <.001) and 1.2 mm (P <.001), respectively. The mandibular plane angle was reduced by 2.3 degrees (P <.001), which led to a counterclockwise rotation of the mandible with a significant decrease in the anterior facial heights (mean of 1.8 mm; P <.001).
Conclusion: Miniscrew anchorage has the advantages of being a simpler procedure, being minimally invasive, and requiring minimal patient cooperation.
|作者单位||1.Peking Univ, Sch Hosp Stomatol, Dept Orthodont, Beijing 100081, Peoples R China|
2.Peking Univ, Sch Hosp Stomatol, Dept Oral & Maxillofacial Surg, Beijing 100081, Peoples R China
|Xun, Chunlei,Zeng, Xianglong,Wang, Xing. Microscrew anchorage in skeletal anterior open-bite treatment[J]. ANGLE ORTHODONTIST,2007,77(1):47-56.|
|APA||Xun, Chunlei,Zeng, Xianglong,&Wang, Xing.(2007).Microscrew anchorage in skeletal anterior open-bite treatment.ANGLE ORTHODONTIST,77(1),47-56.|
|MLA||Xun, Chunlei,et al."Microscrew anchorage in skeletal anterior open-bite treatment".ANGLE ORTHODONTIST 77.1(2007):47-56.|