Access restricted to higher education institution's students and staff
master's thesis
Symmetry and asymmetry of the jaws

Ivana Šop (2014)
Metadata
TitleSimetrije i asimetrije čeljusti
AuthorIvana Šop
Mentor(s)Stjepan Špalj (thesis advisor)
Abstract
Simetriju lica definiramo s obzirom na poziciju, veličinu i oblik točaka desne i lijeve strane lica u donosu na medijalnu i sagitalnu ravninu. Mandibularna asimetrija ima važnu ulogu jer osim estetike može utjecati i na funkcionalne probleme stomatognatnog sustava. Cilj ovog istraživanja bio je ispitati učestalost i intenzitet skeletnih asimetrija mandibule u mješovitoj denticiji te istražiti biološke prediktore asimetrija. Istraživanje je bilo presječno, a uzorak je činilo 205 ispitanika u dobi od 6-15 godina. Klasu II/1 imalo je 59 ispitanika, 77 je imalo klasu II/2, a 69 klasu III. Procijenjena je mandibularna asimetrija na ortopantomogramskoj snimci metodom po Habetsu, dentalna zrelost na ortopantomogramu metodom po Demirjianu, klasa po Angleu, tip denticije te obrazac rotacijskog rasta lica pomoću Jarabakovog omjera na latero-lateralnom kefalogramu. Rezultati analize pokazuju da ispitanici s klasom II/1 imaju ubrzano dentalno sazrijevanje u odnosu na svoju kronološku dob. Promatrajući obrazac rasta uočeno je da ispitanici klase II/2 imaju značajniju tendenciju horizontalnom obrascu rasta. Asimetrije su češće prisutne u visini kondila nego u visini ramusa, no ne postoji statistički značajna razlika između klasa, spolova niti tipa denticije. Kod klase II/2 uočava se jači intenzitet asimetrije kondila, dok se kod ukupne visine ramusa primjećuju manje asimetrije u djece s klasom II/2 nego one s klasom III. Multipli logistički regresijski modeli ukazuju da je uz kontrolu ostalih bioloških prediktora samo muški spol prediktor umjerene ili značajne ukupne asimetrije. Mandibularna asimetrija izraženija je kod ispitanika s klasom III nego kod klasa II/1 i II/2 i muškog spola. U istraživanju nisu dokazane korelacije između asimetrija i pretpostavljenih bioloških prediktora.
Keywordsmandibular asymmetry condylar asymmetry asymmetry index panoramic radiography Angle Class
Parallel title (English)Symmetry and asymmetry of the jaws
Committee MembersStjepan Špalj (committee chairperson)
Nataša Ivančić Jokić (committee member)
Vlatka Lajnert (committee member)
GranterSveučilište u Rijeci
Medicinski fakultet
Lower level organizational unitsKatedra za ortodonciju
PlaceRijeka
StateCroatia
Scientific field, discipline, subdisciplineBIOMEDICINE AND HEALTHCARE
Dental Medicine
Orthodontics
Study programme typeuniversity
Study levelintegrated undergraduate and graduate
Study programmeDental Medicine
Academic title abbreviationdr. med. dent.
Genremaster's thesis
Language Croatian
Defense date2014-04-23
Parallel abstract (English)
Facial symmetry is defined by the position, size and shape of points on both sides of face in comparison to the medial and sagittal plane. Mandibular asymmetry plays an important role, aside from impaired aesthetics it can also affect functional problems of the masticatory system. The aim of this study was to investigate the frequency and intensity of skeletal mandibular asymmetry in the mixed dentition and biological predictors of asymmetry. The study was cross-sectional, and the sample consisted of 205 subjects aged 6-15 years. Class II/1 had 59 patients, 77 patients class II/2, and 69 patients had class III. The mandibular asymmetry was estimated from orthopantomogram using Habet`s technique, dental maturity was estimated from orthopantomogram using method of Demirjian and the rotational pattern of facial growth by Jarabak`s ratio from latero-lateral cephalograms. Beside these, there were other recorded parameters such as dental class according to Angle and type of dentition. Analysis results are showing that Class II/1 have accelerated dental maturation in relation to their chronological age. It has been noticed that the subjects of Class II/2 have a significant tendency for horizontal growth pattern. Asymmetries are often present in condylar height rather than the height of ramus, but there was no statistically significant difference between class, gender or type of dentition. When observing Class II/2, stronger intensity of condylar asymmetry can be noticed, while the total height of ramus shows less asymmetry in children with Class II/2 than those with Class III. Multiple logistic regression models show that by controlling other biological predictors, only male gender is a predictor of moderate or significant overall asymmetry. Mandibular asymmetry is more expressed in patients with class III than with class II/1 and II/2 and men. The study has showed no correlation between asymmetry and presumed biological predictors.
Parallel keywords (Croatian)mandibularna asimetrija kondilarna asimetrija indeks asimetrije panoramska snimka klasa po Angleu
Resource typetext
Access conditionAccess restricted to higher education institution's students and staff
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:184:139713
CommitterBosa Licul