Читать книгу Biological Mechanisms of Tooth Movement - Группа авторов - Страница 28

OTM is the result of a biological response to interference in the physiological equilibrium of the dentofacial complex by an externally applied force (Proffit, 2013). The biological foundation of force‐induced tooth movement, along with some concepts related to it, has been extensively investigated since the onset of the twentieth century. From the classic reports by Sandstedt in 1904 (Figure 2.1), the race was set for exploring the biological foundations of OTM, using histology, radiology, and clinical observations as the main investigative tools. A list of the then prevailing hypotheses aimed at explaining the biological reasons for OTM is presented below:

 The old pressure hypothesis of Schwalbe–Flourens, which postulated that pressure moves teeth, preceded the concept that alveolar bone resorption takes place on one side of the dental root, while deposition occurs on the opposite side, until the pressure is eliminated. Hecht (1900), Sandstedt (1904), Pfaff (1906), and Angle (1907) supported this hypothesis (Oppenheim, 1911).

 Based on his vast clinical experience, Kingsley (1881) stated that slow OTM is associated with favorable tissue‐remodeling changes (resorption and deposition of alveolar bone), while quick movements displace the entire bony lamellae along with the teeth, while retaining their functional and structural integrity. He attributed these features to the elasticity, compressibility, and flexibility of bone tissue. This report is one of the first written explanations for the biological basis of OTM, although it is not frequently cited (Oppenheim, 1911).

Figure 2.1 Page 1 from Sandstedt’s original article on histological studies of tooth movement published in 1904.

(Source: Sandstedt, 1904, 1905.)