Busato A, Balconi G, Vismara V, Bertelè L, Garo G, DE Gregorio D
Medica Libra, Milano, Italy.
Department of Radiology, Hospital San Raffaele Turro, Milano, Italy.
Oral Implantol (Rome). 2017 Feb 14;9(Suppl 1/2016 to N 4/2016):54-64. doi: 10.11138/orl/2016.9.1S.054. eCollection 2016 Jan-Mar.
The aim of the following study is to examine both masseter muscles (left/right) in a group of patients suffering from unilateral chewing during a maximum exertion isometric contraction using the deformation pattern analysis of ultrasound videos and compare them with the results obtained by studying patients with alternate bilateral chewing patterns.
This study has been conducted by use of an ultrasound machine and a linear probe which allowed us to record a video (DCM) comprised of 45 frames per second (MicrUs ext-1H Telemed Medical Systems Milano) and a linear probe (L12-5l40S-3 5-12 MHz 40 mm). The probe was fixed to a brace and the patients were asked to clench their teeth as hard as possible, obtain the muscle's maximum exertion, for 5 seconds three times, with 30 seconds intervals in between. Both right and left masseter muscles were analyzed. We applied to the ultrasound video a dedicated software (Mudy 1.7.7.2 AMID Sulmona Italy) for the analysis of muscle deformation patterns. The total number of patients for this study is 150. Out of this number, 50 belong to Group A, mono lateral chewing on the left side arch, and 50 to Group B, mono lateral chewing on the right side arch. The remains patients belong to Group C, bilateral alternate chewing. The deformation pattern analysis of the skeletal muscles on ultrasound videos allows us to highlight with ease the clear difference in the clenching capabilities and strain management between the dominant masseter and the subordinate masseter in a unilaterally chewing patient.
In the sample investigated both in Group A and Group B the unilateral chewing is associated with a series of parameters (number, shape, volume, position and orientation of the teeth) and is also associated with the extension of the cutting surface really available.
以下研究的目的是，在一组单侧咀嚼的患者进行最大用力等长收缩时，利用超声视频的变形模式分析来检查双侧咬肌（左/右），并将其与研究双侧交替咀嚼模式患者所获得的结果进行比较。
本研究使用了一台超声机器和一个线性探头，这使我们能够记录每秒45帧的视频（DCM）（MicrUs ext-1H Telemed Medical Systems Milano）以及一个线性探头（L12-5l40S-3 5-12 MHz 40 mm）。探头固定在一个支架上，要求患者尽可能用力咬紧牙齿，进行3次每次持续5秒的肌肉最大用力，每次间隔30秒。对左右两侧咬肌都进行了分析。我们将一款专用软件（Mudy 1.7.7.2 AMID Sulmona Italy）应用于超声视频，以分析肌肉变形模式。本研究的患者总数为150人。其中，50人属于A组，左侧牙弓单侧咀嚼；50人属于B组，右侧牙弓单侧咀嚼。其余患者属于C组，双侧交替咀嚼。超声视频上骨骼肌的变形模式分析使我们能够轻松地突出单侧咀嚼患者中优势咬肌和从属咬肌在咬紧能力和应变管理方面的明显差异。
在A组和B组所研究的样本中，单侧咀嚼与一系列参数（牙齿的数量、形状、体积、位置和方向）相关，并且还与实际可用的切割表面的范围相关。
