insertion torque
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PURPOSE: To investigate the parameters that affect primary stability of dental implants, to determine how primary stability influences posthealing stability, and to ascertain the effect of primary stability and insertion parameters on marginal bone loss. MATERIALS AND METHODS: A total of 940 immediately loaded implants were considered. Using resonance frequency analysis, primary stability (primary implant stability quotient [pISQ]) and stability after 4 months (tISQ) were recorded. When the differences between pISQ and tISQ exceeded 5 units, marginal bone loss was measured. The implants were placed into three groups based on their primary stability: high (pISQ > 72), moderate, and low (pISQ < 68). Changes in stability after 4 months of loading were evaluated. The relationships between pISQ, insertion parameters, DISQ (ie, tISQ - pISQ), and marginal bone loss were analyzed. The Student t test, one-way analysis of variance, and Spearman nonparametric correlation coefficient were employed for statistical evaluation. RESULTS: Of the 940 implants, tISQ was recorded in 526 implants and marginal bone loss was measured in 76 implants. There was no statistical relationship between pISQ and insertion torque. Primary stability was influenced by implant diameter but not by implant length. There was a significant relationship between implant insertion torque and bone type. The low primary stability group showed a significant increase in stability during healing. However, high primary stability implants demonstrated a significant reduction in their stability. The linear regression analysis demonstrated that at a pISQ of 69.2, tISQ value would equal pISQ value. Correlations between marginal bone loss and final insertion torque and between marginal bone loss and DISQ values were observed. CONCLUSIONS: Stability of immediately loaded implants with high pISQ decreased significantly during the initial 4 months of healing. However, stability of implants with low primary stability increased significantly. DISQ and insertion torque showed correlation with marginal bone loss.
- MeSH
- analýza rozptylu MeSH
- čelist bezzubá rehabilitace chirurgie MeSH
- endoseální implantace zubů metody MeSH
- lidé středního věku MeSH
- lidé MeSH
- longitudinální studie MeSH
- mandibula MeSH
- neparametrická statistika MeSH
- podpěry zubní MeSH
- resorpce alveolární kosti prevence a kontrola MeSH
- retence zubní protézy škodlivé účinky MeSH
- retrospektivní studie MeSH
- točivý moment MeSH
- výsledek terapie MeSH
- zatížení muskuloskeletálního systému MeSH
- zubní implantáty škodlivé účinky MeSH
- zubní náhrada ve spojení s implantáty škodlivé účinky MeSH
- zubní náhrady úplné dolní MeSH
- zubní protéza - design MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- klinické zkoušky MeSH
- srovnávací studie MeSH
Znalost anatomie, biologie, kinematiky a biomechaniky hlezenního kloubu jsou nutnými předpoklady pro konstrukci endoprotézy a zejména pro operační techniku při implantaci. Je-li anatomie porušena, musí být téměř nebo úplně obnovena během operačního výkonu. Ligamentózní aparát musí být vyvážen nebo rekonstruován, je-li poraněn. Náhrada kloubu by měla dovolovat co největší rozsah pohybu, měla by respektovat normální osu rotace kloubu a umožňovat sdružený pohyb talu v hlezenné vidlici. Komplexní ošetření jednotlivých struktur při operaci je toho nezbytnou podmínkou. V případě komplikací musí mít operatér v záloze alternativní, pokud možno endoprotézu zachovávající výkon.
The knowledge of anatomy, biology, kinematics, and the biomechanics of the ankle joint are the necessary prerequisites both for the construction of an ankle prosthesis and for the surgical technique of its insertion. When the anatomy is distorted, it must be restored to near-normal anatomy and alignment during surgery. The ligament apparatus has to be balanced or repaired, if deficient. The prosthesis should allow for a normal range of motion and it should also respect the normal axis of rotation and allow torque of the talus inside the ankle fork. A complex surgical technique is necessary to provide for such conditions. In case of complications, there should be alternative treatments, preferably revision of the prosthesis.
- Klíčová slova
- artróza, chirurgická technika,
- MeSH
- kotník anatomie a histologie MeSH
- lidé MeSH
- ortopedické výkony metody MeSH
- osteoartróza etiologie chirurgie radiografie MeSH
- poranění kotníku komplikace MeSH
- totální endoprotéza hlezenního kloubu metody MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH