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Introduction To obtain the ideal aesthetics, each restorative material must imitate natural tooth in color, surface texture and be stable over time. Damage or wear of the material causes poor optical properties of the restoration, so it is necessary to repolish, repair or replace it. The aim of this study was to test the gloss and surface changes of the composite materials with filler's particles of different size, before and after material artificial mechanical ageing. Material and Methods Four composite materials were tested, two microhybrid composites (Gradia Direct GC, Herculite XRV, Kerr) and two nanohybrid composites (Filtek Ultimate 3M; TetricEvoceram, Ivoclar). Composites' samples of 9 × 9 × 2 mm in size were polished in accordance to the standard protocol by Sof-Lex discs (2382 C, SM, F, SF) for 30 seconds. Gloss was measured after polishing and taking photos using optical microscope (400×). In the chewing simulator, ageing of the samples was conducted (100,000 cyclic kicks). After the samples' ageing, surface photos were taken and gloss measured. The obtained results were statistically processed (One-way ANOVA, t-test). Results The best gloss after polishing was shown by Filtek Ultimate (54.00 ± 14.06), the worst by Gradia Direct (47.33 ± 7.92). There was no statistically significant difference (p > 0.05) in surface gloss after polishing composite. The smallest defects on the surface of composites were detected in material Gradia Direct (21363.7 mm2 ) with the average value of the diameter 137 mm. Conclusion The tested nanohybrid and microhybrid composites showed comparable gloss value before and after artificial aging. Mechanical aging caused vivid changes regarding surface defects on all tested composite materials., Uvod Da bi se dobila idealna estetika, svaki restaurativni materijal mora oponašati prirodni zub po boji i teksturi površine i mora biti stabilan u vremenu. Oštećenje ili habanje materijala uzrokuje loša optička svojstva ispuna, pa ga je neophodno prepolirati, reparirati ili zameniti. Cilj rada je bio da se ispitaju sjaj i površinske promene kompozita sa različitom veličinom čestica punilaca, pre i posle artificijalnog mehaničkog starenja. Materijal i metode Testirana su četiri kompozita, dva mikrohibridna (Gradia Direct GC; Herculite XRV, Kerr) i dva nanohibridna (Filtek Ultimate 3M; Tetric Evoceram, Ivoclar). Uzorci kompozita (9 × 9 × 2 mm) polirani su po standardnom protokolu diskovima Sof-Lex 30 sek. Posle poliranja izmeren je sjaj, a uzorci su posmatrani pod optičkim mikroskopom (×400). U simulatoru žvakanja uzorci su izloženi artificijalnom starenju sa 100.000 cikličnih udaraca. Posle mehaničkog starenja ponovo je izmeren sjaj, a površine su fotografisane i sačuvane u digitalnom formatu. Dobijeni rezultati su statistički obrađeni (One-way ANOVA, t-test). Rezultati Najveći sjaj posle poliranja pokazao je Filtek Ultimate (54,00 ± 14,06), a najmanji Gradia Direct (47,33 ± 7,92). Nije bilo statistički značajne razlike sjaja između testiranih materijala posle poliranja (p > 0,05). Najmanji defekti na površini kompozita uočeni su kod materijala Gradia Direct (21.364 mm), sa srednjom vrednošću prečnika 137 mm. Zaključak Ispitivani nanohibridni i mikrohibridni kompozitisu pokazali komparabilne vrednosti sjaja pre i posle artificijalnog starenja. Mehaničko starenje je izazvalo vidljive promene u vidu površinskih defekata na svim ispitivanim kompozitima.

Nasal defects can occur as a result of head and neck trauma, or due to partial or complete ablation or resection of the tumor in the nasal area and surroundings. Smaller defects can be reconstructed surgically while large defects are mainly reconstructed combined surgically and prosthetically. The aim of this paper was to present prosthetic reconstruction of the nasal defect by colored vinyl polysiloxane prosthesis retained with craniofacial basal disc implants. An adequate aesthetics and stability of the prosthesis was achieved during mandible and mimic muscles movements., Defekti nosa mogu nastati kao posledica traume glave i vrata ili usled delimične ili potpune ablacije, odnosno resekcije tumora predela nosa i okoline. Manji defekti nosa se rekonstruišu hirurški, dok se veliki defekti uglavnom rekonstruišu kombinovano, kako hirurški tako i protetski. Cilj ovoga rada bio je da se prikaže protetska rekonstrukcija defekta nosa protezom izrađenom od vinil-polisiloksana u boji sa retencijom preko kraniofacijalnih bazalnih disk-implantata. Ovakvom protetskom nadoknadom postignute su zadovoljavajuća estetika i stabilnost proteze pri pokretima mandibule i mimičnih mišića.

Hypodontia of upper lateral incisors is significant aesthetic problem in young people. Ideal solution to this problem would be an implant placement, but there is a problem of unfinished growth and development. It is therefore necessary to have a temporary solution in order to maintain normal stomatognathic system functions and solve aesthetic problems until the final restoration is placed. The aim of this study was to show the possibility of treating hypodontia of permanent upper lateral incisors by creating adhesive bridge in one visit. A 15-year-old patient was referred to the Department for Prosthodontics, School of Dental Medicine in Belgrade with hypodontia of permanent upper lateral incisors. The patient had braces until 14 years of age after which she was rehabilitated with partial denture that was neither aesthetically nor functionally acceptable solution for her and significantly affected her emotional security. The adhesive bridge was made using GC composite fibers and a set of GC composite materials for the purpose of temporary replacement of missing teeth. This treatment provided good functional and aesthetic results. The space for the placement of two endosseous implants is preserved and a period of adaptation positively influenced the patient's social development in sensitive adolescent age., Hipodoncija gornjih lateralnih sekutića predstavlja značajan estetski problem mladih osoba. Idealno rešenje ovog problema bi predstavljala ugradnja implantata i izrada krunice, ali je prisutan problem nezavršenog rasta i razvoja. Zbog toga je neophodno izraditi privremeno rešenje, kako bi se normalno odvijale funkcije stomatognatnog sistema i rešili estetski problemi, sve do izrade trajne nadoknade. Cilj ovog rada bio je da se prikaže mogućnost zbrinjavanja hipodoncije stalnih gornjih lateralnih sekutića izradom adhezivnog mosta u jednoj poseti. Pacijentkinja starosti 15 godina javila se na Kliniku za stomatološku protetiku Stomatološkog fakulteta u Beogradu sa hipodoncijom stalnih gornjih lateralnih sekutića. U anamnezi je navela da je nosila fiksni ortodontski aparat do svoje 14. godine, a potom bila rehabilitovana parcijalnom pločastom protezom, kojom nije bila zadovoljna ni estetski ni funkcionalno, što je značajno uticalo na njenu emocionalnu nesigurnost. Izrađen je adhezivni most primenom GC kompozitnih vlakana i setom GC kompozitnih materijala sa ciljem privremene nadoknade neizniklih zuba. Primenjenom terapijom je postignut zadovoljavajući funkcionalni i estetski rezultat do momenta realizacije trajnog protetskog rešenja. Sačuvan je prostor za ugradnju dva endosealna implantata, a period adaptacije je pozitvno uticao na socijalni razvoj osobe u osetljivom pubertetskom dobu. .

Aesthetic outcome of implant therapy involves the appropriate architecture of peri-implant soft tissue and interdental papilla. The dynamic compression technique of soft tissue is mentioned in contemporary literature as one of the methods for achieving optimal emergence profile. The aim of this case report was to present soft tissue prosthetic modeling with temporary crowns on implants for obtaining an emergence profile of final restoration. A 25-year-old female patient with missing left maxillary central incisor was referred to the Department of Oral Surgery School of Dental Medicine University in Belgrade for dental implant placement. After detailed planning, implant placement of Straumann Bone level implant NC O 3, 3×12 mm (StraumannR Bone Level NC), in the position of 21 was performed. Upon completion of osseointegration period, screw retained laboratory temporary crown was fabricated. During the next 3 months emergence profile was scalloped by creating additional pressure on the soft tissue with periodic adding the composite resin material to a temporary crown. The created emergence profile was transferred to the master cast by using customized impression coping, making possible fabrication of the final implant restoration according to the design made with provisional restoration. Soft tissue conditioning using temporary dental restorations on implants presents a non-invasive method with predictable aesthetic result., Estetski uspeh implantološke terapije podrazumeva odgovarajuću arhitekturu periimplantatnih mekih tkiva i interdentalne papile. Tehnika dinamičke kompresije mekih tkiva pominje se u savremenoj literaturi kao jedna od metoda za postizanje optimalnog izlaznog profila. Cilj ovog rada je bio da se predstavi mogućnost protetičkog modelovanja mekih tkiva zubnom nadoknadom na implantatu za dobijanje izlaznog profila definitivne nadoknade. Žena stara 25 godina sa nedostatkom centralnog sekutića u gornjoj vilici s leve strane upućena je na Kliniku za oralnu hirurgiju Stomatološkog fakulteta Univerziteta u Beogradu radi ugradnje implantata. Posle detaljnog planiranja, u predelu zuba 21 ugrađen je Straumann Bone level implant NC O 3,3×12,0 mm (Straumann® Bone Level NC). Po završenom periodu oseointegracije izrađena je laboratorijska privremena krunica retinirana zavrtnjem. Tokom sledeća tri meseca izlazni profil je oblikovan periodičnim stvaranjem dodatnog pritiska na meka tkiva dodavanjem kompozitnog materijala na privremenu krunicu. Izlazni mekotkivni profil je pomoću individualizovanog transfera pozicije implantata prenet na radni model, što je omogućilo izradu konačne keramičke hibridne krunice prema dizajnu koji je kreiran privremenom nadoknadom. Priprema mekih tkiva privremenim zubnim nadoknadama na implantatima je neinvazivna klinička metoda s predvidljivim estetskim rezultatom i zadovoljavajućom visinom i širinom interdentalne papile.