Tag: sacroiliac joint

Biomechanical aspects of modern models of pelvis stability. Part I: sacroiliac joint and self-bracing mechanism

Rafał Gnat, Edward Saulicz, Michał Kuszewski, Mirosław Kokosz

Rafał Gnat, Edward Saulicz, Michał Kuszewski, Mirosław Kokosz – Biomechanical aspects of modern models of pelvis stability. Part I: sacroiliac joint and self-bracing mechanism. Fizjoterapia Polska 2006; 6(4); 280-288

Abstract
Last two decades of the XXth century brought about significant progress towards recognition of stabilizing mechanisms of kinematic links within human locomotory system. Panjabi formulated his concept concerning stabilizing system of the human kinetic link, scientist from Australia explained the mechanism of stabilization of the lumbar section of the spine, linked its dysfunctions to pain ailments rising in that region of the body and proved the effectiveness of the innovative training system in reduction of severity of such symptoms. Between numerous research in that direction, a biomechanical model of sacroiliac joint stability developed by Dutch scientists from Erasmus University, Rotterdam, is worthy paying attention. This model takes into consideration two coexisting mechanisms that make maintaining stability possible: the form closure and the force closure mechanism. As result of the cooperation between the two an effect of self-bracing of the sacroiliac joint comes into being. The leading idea hidden under the surface of the model is quite similar to the one that ancient architects had in minds while developing the structure of so called roman arch. Here, sacrum plays the role of the keystone and the two femora together with innominates are the columns. After application of quite a small, transversely oriented force, resulting from musculoligamentous system activity the construction remains stable. The objective of the paper is to familiarize reader with details of biological mechanisms that built up foundation for the Dutch model of sacroiliac joint stability.

Key words:
sacroiliac joint, form closure, force closure, self-bracing effect

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Block coincidence of sacroiliac joints in lateral curvature of the spine as well as the effect of the therapy on the size of scoliosis

Daniel Olędzki, Tomasz Sajko, Andrzej Sadowski, Marek Kiljański

D. Olędzki, T. Sajko, A. Sadowski, M. Kiljański – Block coincidence of sacroiliac joints in lateral curvature of the spine as well as the effect of the therapy on the size of scoliosis. FP 2015; 15(2); 22-38

Abstract

In the presentation the authors try to estimate dependencies between lateral curvature of the spine occurrence and the dysfunction of sacroiliac joints as blocks. It was pointed out that scoliosis as a phenomenon can be widely observed in a human body.  The position itself as well as the course of the delivery may lead to different types of muscle tone disorders and positional asymmetry in effect of fascia continuity damaging of the neonate during the delivery or perinatal period.
It may be assumed that the pathology of embryonic development and later in neonatal period can be the origin of the spine statics disorder, and consequently cause overloads of sacroiliac joints manifested in blocks. The secondary effect of the dysfunction of sacroiliac joints may be an asymmetric arrangement of hip bones, and this could lead to asymmetric position of the sacrum and compensatory scoliosis (the term coined by the authors).
Authors underline the important role of the dysfunction of the sacroiliac joint – the strongest proprioreceptor in the joint system – in causing other joints to disfunction, even those which are distant to the pelvis as well as causing muscle tone disorders.
The authors described the following phenomena:
1) how occurrence of sacroiliac joints blocks correlate with the asymmetry of the pelvis position,
2) the relation of lateral curvature of the spine size with the rotation of the spine with a sacroiliac joint block.
In the group of tested children with the scoliosis of a little degree (up to 5 degrees of the rotation) it was noticed that there was a high percentage of the sacroiliac joint dysfunction going with the asymmetric pelvis position. After the therapy of sacroiliac joints blocks there was a statistically substantial improvement in the position of the pelvis as well as the decrease in the scoliosis degree (with connected to it vertebra rotation) was observed.

Key words:
sacroiliac joint, manual therapy, scoliosis, block

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Phenomenon of the dominant and latent blocks of the sacroiliac joint in lateral curvature of the spine – problems related to the pelvis therapy

Daniel Olędzki, Andrzej Sadowski, Tomasz Sajko, Marek Kiljański

D. Olędzki, A. Sadowski, T. Sajko, M. Kiljański: Phenomenon of the dominant and latent blocks of the sacroiliac joint in lateral curvature of the spine – problems related to the pelvis therapy. Fizjoterapia Polska 2015;15(3);12-22

Abstract

The deviation of the spine from the long vertical line of the body can be detected from the early years of a child. The deviation is closely related to the position of the pelvic bones to each other and sacroiliac joints, especially their disfunction, play an important part in this process.
Even a slight shift of the sacrum relative to a hip bone causes the change in the spatial arrangement of the pelvis complex, spine segments located above as well as the hip bones. Early intervention by early diagnosis of the disfunction in little children gives us a chance to correct efficiently the pelvis relative to the spine at the level of so-called “compensatory scoliosis” when the problem lies only in the asymetric arrangement of the pelvis that affect the spatial arrangement of the vertebrae and is totally reversable.
The research team confirmed the fact of occurring “the dominant phenomenon and latent blocks of sacroiliac joints”. Its existance has been proven in 50% of subjects.
The examination and therapy of joints is relatively difficult taking into consideration the phenomenon described in this work. In case of a therapy of only one joint, no intended results can be expected in every second case.
There should be at least two manual examinations to assess the condition of both sacroiliac joints and comparing them with the primal examination. The rule of the manual therapy and examination before and after the therapy is applied in such a case.

Key words:
sacroiliac joint, manual therapy, scoliosis, block

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