Ladha Komal, Gupta Rekha, Gill Shubhra, Verma Mahesh
Department of Prosthodontics, ESIC Dental College & Hospital, New Delhi, India.
Department of Prosthodontics, Maulana Azad Institute of Dental Sciences, New Delhi, India.
J Indian Prosthodont Soc. 2014 Jun;14(2):161-8. doi: 10.1007/s13191-013-0297-z. Epub 2013 Jun 19.
Several studies have compared complete dentures fabricated using conventional and neutral zone (NZ) techniques. However, studies comparing patient satisfaction with complete dentures fabricated using swallowing and phonetic NZ techniques are lacking in literature. To compare patient satisfaction with the complete dentures fabricated using the two NZ techniques. To compare the bucco-lingual dimensions of the NZ records obtained with these techniques. Ten completely edentulous subjects dissatisfied with their existing mandibular complete dentures participated in the study. Five subjects first received the swallowing neutral zone (SNZ) dentures and five the phonetic neutral zone (PNZ) dentures. Tissue conditioner was used as the recording material in both the techniques. After having worn the prosthesis for a minimum of 2 months, subjects responded to a questionnaire that measured their perceptions of various factors associated with the prosthesis. The prostheses were then changed and the procedures repeated. Student t test and non-parametric Mann-Whitney tests were used for statistical analysis. Level of statistical significance was set p < 0.05. There was no statistical significant difference in patient satisfaction with the SNZ and PNZ complete dentures for all the variables assessed. Statistical significant difference was observed for majority of the variables when the two NZ dentures were compared with patients' old dentures. The difference in the mean dimensions of the two NZ records was also found to be statistically insignificant except in the maxillary left premolar region. The study indicated that patient satisfaction with the complete dentures fabricated using SNZ technique did not significantly differ from that of the PNZ technique. Data gathered at the final appointment showed that SNZ dentures were preferred by the patients with regards to esthetics, stability, comfort and ability to chew. For ability to speak, mixed preferences were found.
多项研究比较了使用传统技术和中性区（NZ）技术制作的全口义齿。然而，文献中缺乏比较患者对使用吞咽和语音中性区技术制作的全口义齿满意度的研究。为了比较患者对使用这两种中性区技术制作的全口义齿的满意度。为了比较用这些技术获得的中性区记录的颊舌维度。10名对其现有的下颌全口义齿不满意的无牙颌受试者参与了该研究。5名受试者首先佩戴吞咽中性区（SNZ）义齿，5名佩戴语音中性区（PNZ）义齿。两种技术均使用组织调理剂作为记录材料。在佩戴义齿至少2个月后，受试者对一份问卷做出回应，该问卷测量了他们对与义齿相关的各种因素的看法。然后更换义齿并重复该过程。采用学生t检验和非参数曼-惠特尼检验进行统计分析。统计学显著性水平设定为p<0.05。对于所有评估变量，患者对SNZ和PNZ全口义齿的满意度没有统计学显著差异。当将两种中性区义齿与患者的旧义齿进行比较时，大多数变量观察到统计学显著差异。除上颌左前磨牙区外，两种中性区记录的平均尺寸差异也无统计学意义。该研究表明，患者对使用SNZ技术制作的全口义齿的满意度与PNZ技术没有显著差异。在最后一次就诊时收集的数据显示，在美观、稳定性、舒适度和咀嚼能力方面，患者更喜欢SNZ义齿。对于说话能力，发现了不同的偏好。
