リンガルリテーナーにおけるマルチストランドワイヤーとシングルストランドリボンワイヤーの臨床的比較

Clinical comparison between Multi-Stranded Wires and Single strand Ribbon wires used for lingual fixed retainers.

抄録

背景:

高い成功率を誇る固定式保定装置による長期保定は、矯正治療の再発を最小限に抑える、あるいは禁止するための合理的な解決策であると考えられています。

BACKGROUND: Long-term retention with fixed retainers with a high success rate seems to be a reasonable solution to minimize or prohibit relapse of orthodontic treatment.

方法:

METHODS: Two hundred sixty patients between 13 and 30 years old were recruited for this study. The 0.0175 stainless steel twisted wire (G&H Orthodontics, USA) was compared with a single-strand ribbon titanium lingual retainer wire (Retainium, Reliance orthodontics, USA) was used. When treatment was completed, the retainers were bonded from canine to canine in the mandibular arch of the participants. In the follow-up visits, the patients were recalled every 3 months during the 24 months. Detachments, the time of debonding, and side effects were recorded. Statistical analysis was performed by a blinded statistician using a statistical package for Social Science (SPSS, Version20). After descriptive statistics, Kaplan-Meier analysis was performed to measure the survival rates of each retainer. P value < 0.05 was considered as significant.

結果:

ツイストワイヤースプリントを装着した138名とリボンワイヤーを装着した112名を分析対象とした。Kaplan-Meier推定によると、Twisted WireとRibbon Wireの平均成功期間は約23ヶ月であった。解析の結果、治療法間の全体的な有意差は認められなかった（p＝0.13）。剥離の失敗率は全群でエナメル質接合部に発生し、ツイストリテーナー群で25（18.1％）、リボンリテーナー群で10（8.9％）、Kaplan-Meier分析テストでは群間の失敗率に有意差を認めた（p＝0／006）。

RESULTS: Finally, 138 patients who received twisted wire splint and 112 patients who received ribbon wire were included in the analysis. The average duration of success was about 23 months for twisted wire and ribbon wire, according to the Kaplan-Meier estimates. The analysis showed no significant overall difference between the treatments (p = 0.13). Failure rates in terms of detachments in all groups occurred at the enamel junction, and it was 25 in twisted retainer group (18.1%) and was 10 in ribbon retainer group (8.9%); the Kaplan-Meier analysis test detected a significant difference in the failure rates between the groups (p = 0/006).

結論:

固定式矯正用リテーナーとして、従来のねじれたステンレススチールワイヤーと1本線のチタンフラットメタルリボンワイヤーは同じ臨床効果であるが、リボンワイヤーの方が剥離という点で失敗が少ないことが示された。

CONCLUSIONS: Although the conventional twisted stainless steel wire and single-strand titanium flat metal ribbon wire as fixed orthodontic retainers have the same clinical effects, it was shown that the ribbon wire has less failure in terms of detachments.