Geerts Greta Avm
Int J Prosthodont. 2017 Jul/Aug;30(4):334-340. doi: 10.11607/ijp.5097.
The objective of this trial was to compare short-term patient preference for two mandibular complete denture (CD) fabrication techniques: neutral zone (NZ) and conventional (CV).
A prospective, within-subject, randomized crossover trial was performed on a sample of 37 edentulous patients with complete denture experience. Two new sets of CDs were made for each patient, one set with a CV and one with a NZ mandibular denture. After consecutively wearing each set for at least 2 months after the last adjustment visit, patients indicated their preference (CV, NZ, or none). Associations and comparisons were made using the generalized linear model (GLM) and Fisher exact test between preference and sex, age, period of edentulousness, tissue quality, prosthodontic diagnostic index (PDI), and oral health-related quality of life (OHRQoL) differences of the two interventions assessed using the 20-item oral health impact profile (OHIP-20). Significance was determined at P = .05.
A total of 15 (40%) patients preferred NZ, 8 (22%) preferred CV dentures, and 14 (38%) had no preference. Although more women preferred NZ over CV dentures (50% versus 27%), difference in preference according to sex was not significant (P = .359). Neither was difference in preference and PDI scores significant (P = .603). Preference could not be strongly associated to period of edentulousness, age, tissue scores, and differences in OHIP-20 scores (P > .05), except for OHIP-20 scores and NZ preference (P < .001). Better fit, comfort, and eating were reasons patients preferred a type of denture. These reasons were identified for both types of denture. Appearance and speech were not identified as reasons for a particular preference.
Based on preference expressed by patients, there is no difference between NZ and CV mandibular dentures. Denture preference could not be related to patient variables over the study's time frame.
本试验的目的是比较患者对两种下颌全口义齿（CD）制作技术的短期偏好：中性区（NZ）技术和传统（CV）技术。
对37名有全口义齿佩戴经验的无牙颌患者进行了一项前瞻性、受试者内随机交叉试验。为每位患者制作了两组新的全口义齿，一组采用CV技术制作下颌义齿，另一组采用NZ技术制作。在最后一次调整就诊后，患者连续佩戴每组义齿至少2个月后，表明他们的偏好（CV、NZ或无偏好）。使用广义线性模型（GLM）和Fisher精确检验对偏好与性别、年龄、无牙期、组织质量、口腔修复诊断指数（PDI）以及使用20项口腔健康影响量表（OHIP - 20）评估的两种干预措施的口腔健康相关生活质量（OHRQoL）差异进行关联和比较。显著性水平设定为P = 0.05。
共有15名（40%）患者偏好NZ技术制作的义齿，8名（22%）患者偏好CV技术制作的义齿，14名（38%）患者无偏好。虽然偏好NZ技术制作的义齿的女性多于偏好CV技术制作的义齿的女性（50%对27%），但根据性别划分的偏好差异不显著（P = 0.359）。偏好与PDI评分的差异也不显著（P = 0.603）。除了OHIP - 20评分与NZ技术偏好之间存在关联（P < 0.001）外，偏好与无牙期、年龄、组织评分以及OHIP - 20评分差异之间没有强关联（P > 0.05）。义齿贴合度更好、舒适度更高以及进食方便是患者偏好某种义齿类型的原因。这两种义齿类型都有这些原因。外观和说话没有被确定为偏好某一种义齿的原因。
根据患者表达的偏好，NZ技术和CV技术制作的下颌义齿之间没有差异。在本研究的时间范围内，义齿偏好与患者变量无关。
