Nam Dae-Ho, Lee Dong-Won, Chung Chooryung J, Kim Kyung-Ho, Park Kwang-Ho, Moon Ik-Sang
Resident, Department of Periodontology, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul, Korea.
Assistant Professor, Department of Periodontology, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul, Korea.
J Prosthet Dent. 2014 Apr;111(4):286-92. doi: 10.1016/j.prosdent.2013.10.004. Epub 2013 Dec 10.
Controversy exists as to whether missing second molars should be replaced to restore masticatory ability.
The purpose of this study was to analyze the alteration in masticatory ability associated with the implant restoration of the second molar; the subjective effect of implant treatment on the participant was also assessed.
Twenty-one individuals (13 men and 8 women) participated. Masticatory ability was recorded before the cementation of implant-supported single crowns, immediately after cementation, and 1 month after cementation. The occlusal load (Pa), the load-bearing contact area (mm(2)), and the maximum occlusal force (N) were calculated. A subjective evaluation of masticatory ability was conducted before treatment and 1 month after treatment through the use of a questionnaire to evaluate chewing difficulties and global satisfaction with treatment. The Wilcoxon signed rank test was used to analyze the difference in scores.
The load-bearing contact area, maximum occlusal force, and participant satisfaction were found to increase significantly 1 month after the cementation of implant-supported single crowns. The restoration of the second molar with an implant increased both objective masticatory ability and subjective satisfaction 1 month after cementation of the implant-supported single crowns.
Patients presenting with a missing second molar may benefit from replacement with implant-supported crowns. Longer study periods and larger sample populations are needed to obtain more definitive results.
关于缺失的第二磨牙是否应予以修复以恢复咀嚼能力存在争议。
本研究的目的是分析与第二磨牙种植修复相关的咀嚼能力变化；还评估了种植治疗对参与者的主观影响。
21名个体（13名男性和8名女性）参与研究。在种植体支持的单冠粘固前、粘固后即刻以及粘固后1个月记录咀嚼能力。计算咬合负荷（帕斯卡）、承载接触面积（平方毫米）和最大咬合力（牛顿）。在治疗前和治疗后1个月通过问卷调查评估咀嚼困难程度和对治疗的总体满意度，对咀嚼能力进行主观评价。采用Wilcoxon符号秩检验分析得分差异。
发现种植体支持的单冠粘固后1个月，承载接触面积、最大咬合力和参与者满意度均显著增加。种植修复第二磨牙在种植体支持的单冠粘固后1个月，既提高了客观咀嚼能力，也提高了主观满意度。
第二磨牙缺失的患者可能会从种植体支持的牙冠修复中获益。需要更长的研究周期和更大的样本量以获得更确切的结果。
