Stability of secondarily inserted orthodontic miniscrews after failure of the primary insertion for maxillary anchorage: Maxillary buccal area vs midpalatal suture area
| Autor: | Shunsuke Uesugi, Zuisei Kanno, Satoshi Kokai, Takashi Ono |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Adult
Male Orthodontics Clinical success Mandibular first molar Treatment failure Young Adult 03 medical and health sciences 0302 clinical medicine Risk Factors Suture Anchors Maxilla Orthodontic Anchorage Procedures Premolar Humans Medicine Treatment Failure Midpalatal suture Retrospective Studies Palate business.industry Equipment Design 030206 dentistry Buccal administration medicine.anatomical_structure First insertion Female business 030217 neurology & neurosurgery |
| Zdroj: | American Journal of Orthodontics and Dentofacial Orthopedics. 153:54-60 |
| ISSN: | 0889-5406 |
| Popis: | Introduction Few studies have examined the secondary insertion of orthodontic miniscrews after failure of the first insertion. We investigated both the primary and secondary success rates of miniscrews used for maxillary anchorage and compared the stability of the maxillary buccal area (MB) and the midpalatal suture area (MP). Methods In total, 387 miniscrews were primarily inserted into the MB (between the second premolar and first molar); of these, 81 (20.9%) miniscrews lacked stability and were reinserted into the MB (same position or more distal position) or the MP. Additionally, 84 miniscrews were primarily inserted into the MP; 13 (15.5%) of those lacked stability and were reinserted into the MP. We calculated and compared the primary and secondary success rates in each area. Moreover, we investigated the factors affecting clinical success. Results Although the success rate of the secondary insertion was significantly lower than that of the primary insertion into the MB, miniscrews inserted into the MP were stable in both primary and secondary insertions. The screw length was significantly associated with the stability of miniscrews inserted into the MB. Conclusions For secondary insertions, miniscrews placed in the MP may be more stable than those inserted in the MB. |
| Databáze: | OpenAIRE |
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