New Device for Measuring Lip Pressure

Abstract

Background and Aims : Although several studies have been conducted on measurement of lip pressure, no reliable method of measuring lip pressure is yet available. We developed a new device for measuring lip pressure, and in this paper we describe the device and the results obtained by measuring of lip pressure with it. Methods : The device consists of a lip pressure sensor and a pressure gauge (HANDY MANOMETER ^® Model PG-100). The lip pressure sensor is made of synthetic rubber. Lip pressure was measured in 40 subjects (20 males and 20 females ; mean age, 26.9±3.6 years). Results : With lips closed, lip pressure was 96±26 g/cm² (males : 104±31 g/cm², females : 89±26 g/cm²). With the lips pursed, the lip pressure was found to be 72±36 g/cm² (males : 81±40 g/cm², females : 62±30 g/cm²). Conclusions : The results indicated that the lip pressure is higher in males than in females. This device is useful for functional assessment of patients with facial paralysis or postoperative dysfunction of oral and maxillofacial surgery. Further measurements of lip pressure are required to determine the normal range of lip pressure.