Lassmann Łukasz, Nowak Zuzanna, Orthlieb Jean-Daniel, Żółtowska Agata
Dental Sense Medicover, ul. Myśliwska 33a, 80-283 Gdańsk, Poland.
Department of Temporomandibular Disorders, Medical University of Silesia in Katowice, Traugutta sq. 2, 41-800 Zabrze, Poland.
Life (Basel). 2023 Jan 26;13(2):335. doi: 10.3390/life13020335.
A complex prosthodontic treatment is believed to be more successful when the condylar path is replicated using the articulator. However, there is an ongoing major disagreement between the researchers as the exact relationship between the posterior and anterior determinants has not been clear. The purpose of this study was to investigate whether the protrusive movement of the mandible does correlate with the temporomandibular joint (TMJ) anatomy or with incised features. Subjects (15 males and 15 females) were qualified for this study based on an initial interview including the following criteria: age 21-23 (+/-1), no history of trauma, orthodontic treatment, or temporomandibular disorders (TMD). For each patient, the angle of the condylar path, incisal guidance angle (IGA), interincisal angle, as well as overbite and overjet were measured on cone beam computed tomography (CBCT). This was followed by the examination with the Modjaw electronic axiograph recording and calculating the functional sagittal condylar guidance angle (SCGA) for the right and left TMJ during the protrusion. The results show that the mean functional axiographic measurement of SCGA in protrusion significantly correlates with the TMJ anatomy presented on CBCT. Moreover, a significant correlation was found between the values of SCGA in the functional and anatomical measurements in all its variants. It turned out that, statistically, the AB measurement was the most accurate. Finally, results showed that incisal relationships of permanent teeth such as overbite, overjet, incisal guidance angle and interincisal angle do not correlate with TMJ anatomy, and therefore, regarding an analyzed study group, do not affect the TMJ formation in young adults.
当使用牙合架复制髁突路径时，复杂的口腔修复治疗被认为会更成功。然而，研究人员之间仍存在重大分歧，因为前后决定因素之间的确切关系尚不清楚。本研究的目的是调查下颌前伸运动是否与颞下颌关节（TMJ）解剖结构或切牙特征相关。根据初步访谈，符合以下标准的受试者（15名男性和15名女性）被纳入本研究：年龄21 - 23岁（±1岁），无创伤史、正畸治疗史或颞下颌关节紊乱病（TMD）。对每位患者，在锥形束计算机断层扫描（CBCT）上测量髁突路径角度、切导角（IGA）、切牙间角以及覆牙合和覆盖。随后使用Modjaw电子轴描记仪进行检查，记录并计算左右颞下颌关节在向前突出过程中的功能矢状髁突引导角（SCGA）。结果表明，向前突出时SCGA的平均功能轴描记测量值与CBCT上显示的颞下颌关节解剖结构显著相关。此外，在所有变体中，功能测量和解剖测量的SCGA值之间存在显著相关性。结果发现，从统计学角度来看，AB测量最为准确。最后，结果表明恒牙的切牙关系，如覆牙合、覆盖、切导角和切牙间角与颞下颌关节解剖结构无关，因此，对于所分析的研究组而言，不会影响年轻成年人的颞下颌关节形成。
