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Öğe Comparison of the effects of rapid maxillary expansion caused by treatment with either a memory screw or a Hyrax screw on the dentofacial structures-transversal effects(Oxford Univ Press, 2014) Halıcıoğlu, Koray; Yavuz, İbrahimThe aim of the present study was to investigate and compare the effects of conventional Hyrax screw treatment and memory screw treatment on skeletal and dentoalveolar structures. Thirty-two patients with maxillary transversal deficiency were divided into two groups. The memory-screw group included 17 patients ( nine females and eight males), while the Hyrax-screw group comprised 15 patients ( eight females and seven males). Mean ages of the subjects in the memory-screw and Hyrax-screw groups were 13.00 +/- 1.29 and 12.58 +/- 1.50 years, respectively. Plaster models and postero-anterior cephalograms were taken from the patients at the beginning of the treatment ( T1) and at the end of expansion ( T2) and retention periods ( T3). The mean expansion period was 7.76 +/- 1.04 days in the memory-screw group and 35.46 +/- 9.39 days in the Hyrax-screw group. 'Shapiro-Wilk Normality test' was used to determine whether the investigated parameters were homogeneous or not. To determine the treatment changes within the group, 'paired t-test' and 'Wilcoxon signed-ranks test' were applied to the homogeneous and non-homogeneous parameters, respectively. Comparison between the groups was carried out using 'Student's t-test' for homogeneous parameters and 'Mann-Whitney U-test' for the rest. Rapid maxillary expansion was carried out successfully in both the groups. However, the use of memory screw may be advantageous because it shortens the maxillary expansion period, provides additional expansion in the retention period, and generates light forces relative to the conventional Hyrax screw.Öğe A comparison of the sagittal and vertical dentofacial effects of maxillary expansion produced by a memory screw and a hyrax screw(Australian Soc Orthodontists Inc, 2016) Halıcıoğlu, Koray; Yavuz, İbrahimAim: The aim of the present study was to investigate and compare the cephalometric effects of a conventional Hyrax expansion screw and a memory screw on the skeletal and dentoalveolar structures and soft tissues of the face. Methods: Thirty-two patients with a maxillary transverse deficiency were divided into two groups. A memory-screw group included 17 patients (nine females and eight males), while a Hyrax-screw group was comprised of 15 patients (eight females and seven males). The mean ages of the subjects in the memory-screw and Hyrax-screw groups were 13.00 1.29 and 12.58 1.50 years, respectively. Lateral cephalograms were taken of the patients at the beginning of the treatment (T1), at the end of expansion (T2) and retention periods (T3). The mean expansion period was 7.76 +/- 1.04 days in the memory-screw group and 35.46 +/- 9.39 days in the Hyrax-screw group. The Shapiro-Wilk Normality test was used to determine whether the investigated parameters were homogeneous. To determine the treatment changes within the groups, a paired t-test and Wilcoxon Signed Rank test were applied to the homogeneous and non-homogeneous parameters, respectively. A comparison between the groups was carried out using the Student's t-test for homogeneous parameters and the Mann-Whitney U test for all others. Results: A results summary indicates that mid-palatal sutural opening and subsequent important skeletal and dental expansions were obtained in all patients. The maxilla moved anteriorly and inferiorly in both groups while the mandible rotated inferiorly and posteriorly but to a greater extent in the memory-screw group. Conclusion: The newly-developed memory expansion screw takes advantage of rapid and slow maxillary expansion protocols. The suture is opened and the maxilla expanded with relatively lighter forces over a shorter time. The RME using the memory screw resulted in similar sagittal and vertical changes to those produced by the Hyrax screw.Öğe Effects of face mask treatment with and without rapid maxillary expansion in young adult subjects(E H Angle Education Research Foundation, Inc, 2014) Halıcıoğlu, Koray; Yavuz, İbrahim; Ceylan, İsmail; Erdem, AbdulvahitObjectives: To investigate the skeletal, dental, and soft tissue effects of the face mask (FM) treatment with and without rapid maxillary expansion (RME) in young adult subjects with maxillary retrognathia. Materials and Methods: Pretreatment and posttreatment cephalometric radiographs from 32 subjects who had a skeletal Class III malocclusion were analyzed. The subjects were divided into two groups: FM group (N = 17; 3 male and 14 female subjects; mean [SD] age 14.47 [0.89] years) was treated with FM only, while the RME+FM group (N = 15; 3 male and 12 female subjects; mean [SD] age 14.67 [1.28] years) was treated with both FM and RME. Ten cephalometric linear and nine angular variables were measured to assess dentofacial changes. Within-group and between-group comparisons were determined by a paired t-test and Student's t-test, respectively. Results: Forward displacement of the maxilla and a clockwise rotation of the mandible occurred in both groups. The maxillary-mandibular relationship improved and soft tissue changes resulted in a more convex profile. The maxillary incisors were more proclined in the FM group than in the RME+FM group, the only difference between the two groups. Notably, the mandibular incisors moved backward in both groups. Conclusions: Forward movement of the maxilla can be obtained in young adults after face mask treatment. However, there was no difference in this phenomenon between the FM and RME+FM groups.Öğe An evaluation of condylar and ramal vertical asymmetry in adolescents with unilateral and bilateral posterior crossbite using cone beam computed tomography (CBCT)(Australian Soc Orthodontists Inc, 2014) Halıcıoğlu, Koray; Çelikoğlu, Mevlüt; Yavuz, İbrahim; Şekerci, Ahmet Ercan; Büyük, Süleyman KutalmışAims: The primary purpose was to evaluate condylar and ramal vertical asymmetry in adolescent patients displaying unilateral posterior (UCB) and bilateral posterior crossbite (BCB) malocclusions. A secondary aim was to compare the findings with a matched control group exhibiting normal occlusion (CG) using cone beam computed tomography (CBCT). Material and methods: The study groups consisted of (1) 30 patients (Mean age: 14.49 +/- 1.91years) with a UCB, (2) 29 patients (Mean age: 14.57 +/- 1.84 years) with a BCB, and (3) 36 patients (Mean age: 14.24 +/- 2.42 years) as a matched control group (CG). Condylar, ramal, condylar-pluslomal height and index measurements were performed using CBCT images following the method of Hobets et al. A paired t-test was performed for side comparison in each group. One-way ANOVA (Analysis of Variance) was used to determine statistically-significant differences between the groups for asymmetry index measurements and Tukey's HSD test was employed for individual group differences. Results: There was no statistically significant difference in condylar height (CH), ramal height (RH), and condylar plus ramal height (CH + RH) measurements between the right and left sides of the UCB group and CG, except for the RH in the BCB group (p = 0.045). Tukey's HSD test showed that the ramal asymmetry index (RAI) and the condylar plus the ramal asymmetry index (CRAI) were statistically significantly different between the UCB and BCB groups (p = 0.035 and p = 0.015, respectively). Conclusions: Although the condylar asymmetry index (CAI) values were found to be high in the groups of UCB (13.84 +/- 11.33), BCB 19.38 +/- 8.561, and CG (10.58 +/- 9.48), the comparisons amongst the groups were not statistically significant. The asymmetry between the UCB and BCB groups was observed for RAI and CRAI values, rather than CAI values.Öğe Hızlı üst çene genişletmesinin tıbbi faydaları: Literatür derlemesi(2011) Halıcıoğlu, Koray; Kiki, Ali; Yavuz, İbrahimHızlı üst çene genişletmesi (RME) iskeletsel seviyede meydana gelen üst çene darlığının tedavisi amacıyla sıklıkla kullanılan bir ortodontik tedavi yöntemidir. RME ile sadece daralmış üst çene genişlemekle kalmaz aynı zamanda üst çenenin genişlemesine bağlı olarak nazal hava yolu boyutlarında ve burun solunumunda artış, tensör ve levatör veli palatini kaslarında gerilmelere bağlı olarak ise östaki tüpünün fonksiyonlarında düzelme ve orta kulak iltihabında azalma da meydana gelmektedir. RME’nin altını ıslatma alışkanlığı üzerine de iyileştirici etkiye sahip olduğu pek çok yazar tarafından bildirilmiştir. Bu makalede RME’nin tıbbi faydaları ile ilgili literatürler gözden geçirilmiştir.Öğe Maxillary expansion with the memory screw : a preliminary investigation(Korean Assoc Orthodontists, 2012) Halıcıoğlu, Koray; Kiki, Ali; Yavuz, İbrahimObjective: The purpose of this study was to investigate the effects of a newly developed rapid maxillary expansion screw-the memory screw-over 6 months. Methods: Five subjects, aged between 11.7 and 13.75 years, were enrolled in this study. All subjects underwent placement of a maxillary expansion appliance containing superelastic nickel-titanium open-coil springs in its screw bed. The parents of the patients and/or the patients themselves were instructed to activate the expansion screw by 2 quarter-turns 3 times a day (morning, midday, and evening; 6 quarter-turns a day). The mean expansion period was 7.52 +/- 1.04 days. Dentoskeletal effects of the procedure, including dentoalveolar inclination, were evaluated. Measurements of all the parameters were repeated after 6 months of retention in order to check for relapse. Results: Sella-Nasion-A point (SNA) and Sella-Nasion/Gonion-Menton angles increased, and Sella-Nasion-B point (SNB) angle decreased in all the subjects during the expansion phase. However, they approximated to the initial values at the end of 6 months. On the other hand, the increments in maxillary apical base (Mxr-Mxl) and intermolar widths was quite stable. As expected, some amount of dentoalveolar tipping was observed. Conclusions: The newly developed memory expansion screw offers advantages of both rapid and slow expansion procedures. It widens the midpalatal suture and expands the maxilla with relatively lighter forces and within a short time. In addition, the resultant increments in the maxillary apical base and intermolar width remained quite stable even after 6 months of retention. [Korean J Orthod 2012;42(2):73-79]Öğe Palatinale gömülü maksiller kanin dişlerin sabit ve hareketli apareyler ile sürdürülmesi: Olgu sunumu(2011) Halıcıoğlu, Koray; Kiki, Ali; Yavuz, İbrahim; Baydaş, BülentÜst çene ön bölge dişlerinin sürme bozuklukları, yüz estetiğini olumsuz yönde etkileyen bir klinik problemdir. Gömülü dişlerin ark içindeki ideal yerlerine ortodontik olarak sürdürülmesi ve dizilmesi hastaya daha iyi bir gülümseme sağlamaktadır. Bu amaç doğrultusunda, klinisyenin en iyi ortodontik mekaniği seçmesi gerekmektedir. Bu çalışmada palatinale gömülü maksiller kaninlerin sürdürülmesi amacıyla kullanılan ortodontik ve cerrahi tedavi seçenekleri anlatılmış ve palatinal pozisyonda gömülü maksiller kanin dişlerinin sabit ve hareketli ortodontik aygıtlarla sürdürüldüğü iki olgu ve bu mekaniklerin avantaj ve dezavantajları sunulmuştur. Sunulan ikinci olguda retansiyon kroşeleri ve helikal springleri olan basit ve etkili müteharrik aparey ile gömülü dişlerin sürdürüldüğü yeni bir yöntem anlatılmıştır.Öğe Subjective symptoms of RME patients treated with three different screw activation protocols: a randomised clinical trial(Australian Soc Orthodontists Inc, 2012) Halıcıoğlu, Koray; Kiki, Ali; Yavuz, İbrahimAims: The purpose of the present study was to evaluate the subjective symptoms of patients during the active phase of rapid maxillary expansion (RME) treatment, and further, to assess the differences between three different RME activation protocols. Materials and methods: The clinical sample consisted of 60 patients (mean age 13.5 years) with maxillary transverse deficiency requiring expansion. The subjects were randomly divided into three groups on which different expansion protocols were performed. An evaluation of the subjective symptoms was carried out by a Numerical Rating Scale (NRS). The patients completed questionnaires after the first, fifth, tenth, twentieth and final activations. A Shapiro-Wilk test was applied to evaluate homogenity; a Kruskall Wallis test was performed for gender-related differences and to compare the different activation schedules. The Wilcoxon test was used to compare the activations at the various time intervals. Results: No gender-related differences were found. Ninety-eight percent of the patients reported pain during RME. There were no specific differences between groups except for the pain perceived at the twentieth activation. In all groups, pain, the sensation of pressure and its duration were highest at the fifth activation. Subjective symptoms tended to decrease after the fifth and tenth activations. Headache and dizziness were minimal. Conclusion: Different activation protocols did not appear to alter subjective symptoms encountered during RME. The majority of the patients undergoing RME suffered pain and pressure sensations especially after the fifth activation. (Aust Orthod J 2012; 28: 225-231)
