Gupta Swati, Tarannum Fauzia, Gupta N K, Upadhyay Manoj, Abdullah Ahsan
Department of Prosthodontics, Babu Banarasi Das College of Dental Sciences, Babu Banarasi Das University, Lucknow, Uttar Pradesh, India.
Department of Prosthodontics, Career Postgraduate Institute of Dental Sciences and Hospital, Lucknow, Uttar Pradesh, India.
J Indian Prosthodont Soc. 2017 Jul-Sep;17(3):250-254. doi: 10.4103/jips.jips_321_16.
The purpose of the study was to assess and compare the occlusal contacts in dentate and edentulous patients wearing complete denture with varying head posture.
sampling of 30 subjects (15 dentate and 15 edentulous) based on inclusion and exclusion criteria was done. Subjects were divided into two groups: dentate and edentulous. Each group was further divided into two subgroups based on two head postures-upright 90° and ventroflexed 30°. For recording of every posture, a new sensor was used, and the subject was asked to clench on the sensor in maximum intercuspation position at the two head postures.
Data were summarized as mean ± standard error and compared by Student's -test using SPSS software (windows version 17.0 IBM corporation, New York, USA). A statistically significant correlation between head posture and contact area was found in dentate and denture wearers, i.e., tooth contact area varies with head posture.
It was concluded that the occlusal contacts vary at different head posture in dentate as well as in denture wearers. With ventroflexion, the number of tooth contact decreased as compared to upright-erect position in both groups. Clinical implication - since the number of tooth contacts varies with varying head postures, it is recommended that the balancing of the contacts should be done at varying head postures.
本研究的目的是评估和比较不同头部姿势下佩戴全口义齿的有牙颌和无牙颌患者的咬合接触情况。
根据纳入和排除标准对30名受试者（15名有牙颌和15名无牙颌）进行抽样。受试者分为两组：有牙颌组和无牙颌组。每组又根据两种头部姿势——直立90°和前屈30°进一步分为两个亚组。对于每种姿势的记录，使用新的传感器，并要求受试者在两种头部姿势下处于最大牙尖交错位时紧咬在传感器上。
数据总结为平均值±标准误差，并使用SPSS软件（美国纽约IBM公司Windows版本17.0）通过学生t检验进行比较。在有牙颌患者和义齿佩戴者中发现头部姿势与接触面积之间存在统计学上的显著相关性，即牙齿接触面积随头部姿势而变化。
得出的结论是，有牙颌患者和义齿佩戴者在不同头部姿势下的咬合接触情况不同。与直立姿势相比，两组在前屈时牙齿接触数量均减少。临床意义——由于牙齿接触数量随头部姿势的变化而变化，建议在不同头部姿势下进行接触的平衡。
