Reakcija kosti na ortodontsku silu

master's thesis

• Author: Jasmina Milić
• Mentor: Senka Meštrović (mentor)
• Granter: University of Zagreb; School of Dental Medicine; Zagreb
• Defense date and country: 2004, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Dental Medicine; Orthodontics

Abstract

Svaki zub povezan je s alveolarnom kosti periodontalnim ligamentom. Najvažniji elementi PDL – a su glavna vlakna kolagena organizirana u snopove. Osim vlakana ligament sadrži i 4 vrste stanica. Alveolarnu kost čini 1/3 organskog matriksa (kolagen i nekolageni proteini) i 2/3 anorganske tvari (Ca, fosfati, karbonati, citrati...) Tijekom žvakanja nestlačiva tkivna tekućina unutar PDL – a sprečava brz pomak zuba. Umjesto toga, sila se prenosi na alveolarnu kost koja se savija i stvara piezoelektrični signal kao važan stimulans u regeneraciji kosti. Za ortodontski pomak zuba vrijedi teorija protoka krvi uvjetovana kemijskim promjenama. Mobilne i fiksne ortodontske naprave izvor su umjetnih sila koje pomiču zube. Razlikujemo nekoliko vrsta pomaka. Inicijalna reakcija tkiva na silu zbiva se nakon nekoliko minuta. Kompresija PDL - a može uzrokovati ishemiju i hijalinizaciju. Tada pomak zuba prestaje dok se
hijalinizirana zona ne ukloni podminiranom resorpcijom. Štetni učinci ortodontske sile su resorpcija korijena, bol i patološka
pomičnost zuba. Retencijski period nadovezuje se na aktivni tok terapije. Ima za cilj retinirati postignuti terapijski učinak i spriječiti pojavu recidiva.

Abstract (english)

Each tooth is attached to the alveolar bone by the periodontal ligament (PDL). The major components of PDL are the principle collagenous fibers organized in bundels. Except for fibers, the ligament consists of four types of cellular elements.
Alveolar bone contains 1/3 organic matrix (collagen and non – collagen proteins) and 2/3 anorganic components (calcium, phosphates, carbonates, cytrates..) During the masticatory function the incompressible tissue fluid within the PDL space prevents quick displacement of the tooth. Instead of this, the force is transmitted on alveolar bone which bends and produces piezoelectric signal as an important stimulus to skeletal regeneration. The orthodontic tooth movement relates
with blood flow theory and relies on chemical changes. Removable and fixed appliances produce forces that cause tooth movement. There are several types of movement. Initial tissue reaction on the force appears within several minutes. Compression of the PDL may cause ishemic and hyalinized zone. Then the tooth movement is stopped until the hyalinized zone is eliminated by undermining resorption. Deleterious effects of orthodontic force are root resorption, pain and pathologic
tooth movement. The retention period continues to the active period of treatment. It should retain achieved treatment effect and prevent relapse.

• Keywords: žvačna sila; ortodontske naprave
• Keywords (english): Bite Force; Orthodontic Appliances
• Language: croatian
• URN:NBN: urn:nbn:hr:127:229872
• Study programme: Title: dental medicine; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: doktor/doktorica dentalne medicine (doktor/doktorica dentalne medicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2024-05-23 09:17:49