Carletti Talita Malini, Pinheiro Mayara Abreu, Gonçalves Thais Marques Simek Vega, Rodrigues Garcia Renata Cunha Matheus
Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil.
Department of Prosthodontics, Federal University of Santa Catarina, Florianópolis, Brazil.
J Oral Rehabil. 2019 Feb;46(2):127-133. doi: 10.1111/joor.12729. Epub 2018 Oct 26.
Edentulism can reduce mastication, leading to changes in food pattern, with possible consequences to masticatory muscle thickness.
This study verified masticatory function and oral perception in subjects who did not use lower CDs, and whether the insertion of new upper and lower CDs would improve such variables.
Fifteen edentulous elderly who wore only the upper CD were selected and received new upper and lower CD. Volunteers were evaluated at baseline and after 1, 3 and 6 months of new prosthesis use. Masticatory performance (MP) was assessed by the sieving method (X values). Masseter thickness (MT) was evaluated by ultrasonography. Oral sensorial ability (OSA) was assessed by oral stereognosis test and maximum tongue pressure (MTP) was verified by pressure sensors. Data were submitted to repeated measures ANOVA and Tukey-Kramer posthoc tests (α = 0.05). Correlation between OSA and MTP was verified by Person's correlation.
X and MTP decreased (P < 0.05) after 1 month and remained stable (P > 0.05) for next assessments. After 3 months, MT in rest position was increased (P < 0.05), while during maximum voluntary contraction 1 month was enough to increase MT (P < 0.05). There were no differences for OSA (P > 0.05) and no correlation between OSA and MTP.
Masticatory performance and masseter thickness of elderly who did not use the lower dentures were improved after 2 months using new upper and lower CDs. However, new CDs in both dental arch decreased MTP. Brazilian Registry of Clinical Trials (ReBEC #RBR-37gdst).
无牙状态会降低咀嚼功能，导致食物模式改变，可能会对咀嚼肌厚度产生影响。
本研究验证了未使用下颌义齿的受试者的咀嚼功能和口腔感知能力，以及佩戴新的上下颌义齿是否会改善这些变量。
选取15名仅佩戴上颌义齿的无牙老年患者，并为其佩戴新的上下颌义齿。在基线时以及佩戴新义齿1、3和6个月后对志愿者进行评估。通过筛分法（X值）评估咀嚼性能（MP）。通过超声评估咬肌厚度（MT）。通过口腔实体觉测试评估口腔感觉能力（OSA），并通过压力传感器验证最大舌压（MTP）。数据采用重复测量方差分析和Tukey-Kramer事后检验（α = 0.05）。通过Person相关性验证OSA和MTP之间的相关性。
1个月后X和MTP降低（P < 0.05），在接下来的评估中保持稳定（P > 0.05）。3个月后，静息位的MT增加（P < 0.05），而在最大自主收缩时，1个月就足以使MT增加（P < 0.05）。OSA无差异（P > 0.05），OSA和MTP之间无相关性。
未使用下颌义齿的老年人在佩戴新的上下颌义齿2个月后，咀嚼性能和咬肌厚度得到改善。然而，两个牙弓的新义齿均降低了MTP。巴西临床试验注册中心（ReBEC #RBR-37gdst）。
