Adresa za dopisivanje Samra Korać DMD, MSc Sveučilište u Sarajevu Stomatološki fakultet Zavod za restorativnu stomatologiju i endodonciju Bolnička 4 a 1000 Sarajevo, Bosna i Hercegovina samragk@gmail.com Sažetak Svrha istraživanja bila je izmjeriti i usporediti unutarnju stabilnost boje triju svjetlosnopolimerizirajućih materijala i jednoga kemijski stvrdnjavajućeg nakon njihova ubrzanog starenja. Materijali i metode: Testovi za stabilnost boja obavljeni su na svjetlosnopolimerizirajućim kompozitima – nanopunjenju Filtek Supreme XT (3M ESPE), nanohibridu Tetric Evo Ceram (Ivoclar Vivadent) i mikrohibridu Herculite XRV (Kerr) te na samopolimerizirajućem kompozitu Bisfil II (Bisco). Svi uzorci bili su uronjeni u destiliranu vodu (37°C) i držani u tamnoj posudi 24 sata. Nakon toga podijeljeni su u tri skupine. Postupak ubrzanog starenja proveden je prema dvama protokolima – u vodenoj kupelji na 60°C i prema ISO-u 7491. Uzorci iz kontrolne skupine držani su u destiliranoj vodi 30 dana na temperaturi od 37°C. Razlike u boji – ∆E, računale su se iz koordinata CIE L*a*b* izmjerenih spektrofotometrom nasuprot bijeloj pozadini prije postupka starenja uzoraka i poslije njega. Razina osjetljivosti boje postavljena je na 1, a prihvatljivi šum na 3,5. Statistička analiza obavljena je uparenim t-testom i ANOVA-om (p≤0,05). Rezultati: Svi ispitani materijali pokazali su klinički neprihvatljive promjene boje nakon ubrzanog starenja u vodenoj kupelji, a fotostarenjem nastala je vidljiva promjena boje kod svih svjetlosnopolimerizirajućih kompozita. Nanokompozitni materijali značajno su promijenili boju i u kontrolnoj skupini. Zaključak: Unutarnja stabilnost boje testiranih materijala ovisi o uvjetima starenja i vrsti dentalnog kompozita. Kemijski stvrdnjavajući kompoziti pokazali su tijekom fotostarenja bolju stabilnost. Ključne riječi kompozitne smole; starenje; materijali, testiranje; boja 1 Katedra za restorativnu stomatologiju i endodonciju Stomatološkog fakulteta Sveučilišta u Sarajevu Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, University of Sarajevo 2 Odjel za ispitivanje dentalnih materijala Akademskog centra za stomatologiju, Amsterdam (ACTA), Nizozemska Dental Materials Science Department, Academic Centre for Dentistry Amsterdam (ACTA) 3 Katedra za pretkliničku stomatologiju Stomatološkog fakulteta Sveučilišta u Sarajevu Departmet of Preclinical Dentistry, Faculty of Dentistry, University of Sarajevo

Background: Recognition that total laminectomy may perpetuate or cause segmental instability heralded the introduction of less invasive techniques of decompression in lumbar spinal stenosis surgery. Aim : It was our aim to compare formal laminectomy and minimally invasive decompressive procedures in terms of safety and clinical outcome, specifically in respect to the development of postoperative spinal instability. Methods: A retrospective analysis of medical records for 73 patients operated on for lumbar spinal stenosis (22 patients after laminectomy and 51 patients after minimally invasive decompression), with available follow-up data was performed. Basic variables were analyzed in respect to clinical outcome and in regard to development of radiological instability. Results: Radiologic instability was present in 27,3% of patients after laminectomy, as compared to only 2,0% after laminotomy (p<0,001). Regression analysis identified presence of preoperative slip (p=0,0056) and type of surgery (p=0,0204) as sole predictors of instability after surgery. Clinical outcome analysis (laminectomy vs. laminotomy) revealed favorable outcome in both treatment groups, although significantly in favor of the laminotomy group (VAS p= 0,013 and RM p=0,031). Finally, difference in outcome was affected by weather radiologic instability was present or not (p=0,04 and p=0,09 for difference in outcome graded by VAS and RM values respectively) Conclusion: Our results suggest that laminectomy is associated with prohibitively high incidence of postoperative radiologic instability when compared to minimally invasive decompression techniques. Furthermore, radiological instability translates to worse clinical outcome. Finally, patients undergoing laminectomy experience less favorable clinical outcome when compared to those undergoing minimally invasive decompression surgeries.

Trigonocephaly denotes the calvarial deformity caused by premature closure of the metopic suture (metopic synostosis). The frequency of craniosynostosis in general is estimated to be 0.4 per 1000 live births, and trigonocephaly accounts for 5% of all craniostenoses, meaning that this condition is fairly rare. Several studies disclosed that craniosynostosis in twins is a very rare occurrence among craniofacial anomalies. We present a rare case of trigonocephaly in twins where surgery yielded cosmetically satisfactory results.

Isolated cavernous and venous angiomas are common vascular cerebral malformations but their association is less frequent. Presence of venous angioma enhances the risk of bleeding from cavernous angioma. Also, this association is important for surgical planning. While early extirpation of cavernous angioma is recommended, the associated venous angioma has to be preserved due to the possible venous infarction. We report a case of venous angioma associated with cavernous angioma revealed by magnetic resonance imaging after the administration of contrast material, which was not visualised on unenhanced MRI images. The importance of contrast administration in the diagnosis of venous angioma in a close vicinity of cavernous is emphasised in this report.