Three-Dimensional Evaluation of Treatment Effects and Post-Treatment Stability of Maxillary Molar Intrusion Using Temporary Anchorage Devices in Open Bite Malocclusion

被引：3

作者：

Ogura, Hiroki ^{[1
]}

Numazaki, Kento ^{[1
]}

Oyanagi, Toshihito ^{[1
]}

Seiryu, Masahiro ^{[1
]}

Ito, Arata ^{[1
]}

Noguchi, Takahiro ^{[1
]}

Ohori, Fumitoshi ^{[1
]}

Yoshida, Michiko ^{[1
]}

Fukunaga, Tomohiro ^{[1
]}

Kitaura, Hideki ^{[1
]}

Mizoguchi, Itaru ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Dent, Div Orthodont & Dentofacial Orthoped, 4-1 Seiryo Machi,Aoba Ku, Sendai 9808575, Japan

来源：

JOURNAL OF CLINICAL MEDICINE | 2024年 / 13卷 / 10期

关键词：

orthodontic treatment; molar intrusion; temporary anchorage devices (TADs); mini-screws; open bite; three-dimensional; post-treatment stability; ANTERIOR OPEN-BITE; LONG-TERM STABILITY; ORTHODONTIC MINI-IMPLANTS; SKELETAL ANCHORAGE; SURGERY; ADULTS; OUTCOMES;

D O I：

10.3390/jcm13102753

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Background: We investigated treatment outcomes and post-treatment stability in 10 patients with an anterior open bite and nonsurgical orthodontics. Methods: The patients underwent maxillary molar intrusion using temporary anchorage devices (TADs) to deepen the overbite due to mandibular autorotation. Lateral cephalograms and dental cast models were obtained before treatment (T0), immediately after it (T1), and >1 year after it (T2). Skeletal and dental cephalometric changes and three-dimensional movements of the maxillary dentitions were evaluated. Results: At T0, cephalometric analysis indicated that patients had skeletal class I with tendencies for a class II jaw relationship and a skeletal open bite. During active treatment (T0 to T1), the maxillary first molar intruded by 1.6 mm, the mandibular first molar extruded by 0.3 mm, the Frankfort-mandibular plane angle decreased by 1.1 degrees, and the overbite increased by 4.1 mm. Statistically significant changes were observed in the amount of vertical movement of the maxillary first molar, Frankfort-mandibular plane angle, and overbite. Three-dimensional (3D) dental cast analysis revealed that the maxillary first and second molars intruded, whereas the anterior teeth extruded, with the second premolar as an infection point. In addition, the maxillary molar was tipped distally by 2.9 degrees and rotated distally by 0.91 degrees. Statistically significant changes were observed in the amount of vertical movement of the central incisor, lateral incisor, canine and first molar, and molar angulation. From T1 to T2, no significant changes in cephalometric measurements or the 3D position of the maxillary dentition were observed. The maxillary and mandibular dentitions did not significantly change during post-treatment follow-up. Conclusions: Maxillary molar intrusion using mini-screws is an effective treatment for open bite correction, with the achieved occlusion demonstrating 3D stability at least 1 year after treatment.

引用

页数：13

共 38 条

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