Tulunoglu Ozlem, Ulusu Tezer, Genç Yasemin
Department of Pediatric Dentistry, Faculty of Dentistry, University of Gazi in Ankara, Turkey.
J Contemp Dent Pract. 2005 Feb 15;6(1):74-84.
The aim of this study was to evaluate the median survival time of fixed and removable space maintainers related to age groups, gender, and their distribution in upper and lower dental arches. The adherence of patients to a periodic recall program and the success rate of different types of space maintainers related to different arches were also evaluated. This study included 663 patients aged between 4-15 years old that were treated between the years of 1997 and 2002. The patients were categorized into four main groups: lost to follow-up, failed, successful, and censored at the end of study. Three hundred forty-five space maintainers were considered lost to follow-up, 83 were considered failed, 206 successful, and 20 censored-at-end. The overall median survival time of the appliances was 6.51 months. Median survival time was 7.25 months in the 4-6 age group, 6.35 months in the 7-12 age group, and 7.0 months in the 13+ age groups. Median survival time was 5.76 months in girls and 7.11 months in boys. Median survival time of space maintainers was 7.17 months for maxilla and 6.69 months in the mandible. Median survival time was 5.25 months for space maintainers fabricated in both arches.
本研究的目的是评估固定和可摘式间隙保持器的中位生存时间，分析其与年龄组、性别以及在上、下颌牙弓中的分布情况。同时还评估了患者对定期回访计划的依从性，以及不同类型间隙保持器在不同牙弓中的成功率。本研究纳入了1997年至2002年间接受治疗的663例4至15岁的患者。患者被分为四个主要组：失访、失败、成功以及在研究结束时被截尾。345个间隙保持器被视为失访，83个被视为失败，206个成功，20个在研究结束时被截尾。矫治器的总体中位生存时间为6.51个月。4至6岁年龄组的中位生存时间为7.25个月，7至12岁年龄组为6.35个月，13岁及以上年龄组为7.0个月。女孩的中位生存时间为5.76个月，男孩为7.11个月。上颌间隙保持器的中位生存时间为7.17个月，下颌为6.69个月。双侧牙弓制作的间隙保持器中位生存时间为5.25个月。
