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Angle Orthodontist

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https://www.readbyqxmd.com/read/30394787/the-relationship-between-3d-dentofacial-photogrammetry-measurements-and-traditional-cephalometric-measurements
#1
Jose C Castillo, Grace Gianneschi, Demyana Azer, Amornrut Manosudprasit, Arshan Haghi, Neetu Bansal, Veerasathpurush Allareddy, Mohamed I Masoud
OBJECTIVES: To determine the relationship between traditional cephalometric measurements and corresponding nonradiographic three-dimensional (3D) photogrammetry measurements. MATERIALS AND METHODS: This was a cross-sectional study of 20 orthodontic patients (10 male and 10 female) who received lateral cephalometric radiographs and 3D dentofacial photogrammetric records with each subject serving as his or her own control for a total sample size of 40 images (20 per method)...
November 5, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30382751/a-novel-technique-for-measurement-of-orthodontic-mini-implant-stability-using-the-osstell-isq-device
#2
Yara K Hosein, S Jeffrey Dixon, Amin S Rizkalla, Ali Tassi
OBJECTIVES: To develop and validate a method for application of the Osstell ISQ device in the assessment of mini-implant stability. MATERIALS AND METHODS: An adaptor was developed for attachment of Osstell's SmartPeg onto a variety of orthodontic mini-implants. For validation of the adaptor, Benefit mini-implants were inserted into bone blocks that mimicked different stability conditions. The Osstell device was used to assess mini-implant stability with the adaptor (test measurement) and conventional SmartPeg attachment (gold-standard measurement)...
November 1, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30372127/failure-rates-for-stainless-steel-versus-titanium-alloy-infrazygomatic-crest-bone-screws-a-single-center-randomized-double-blind-clinical-trial
#3
Chris H Chang, Joshua S Lin, W Eugene Roberts
OBJECTIVES: To compare failure rates for stainless steel (SS) and titanium alloy (TiA) bone screws (BSs) placed in the infrazygomatic crest (IZC). MATERIALS AND METHODS: A total of 386 consecutive patients (76 male, 310 female; mean age 24.3 years, range 10.3-59.4 years) received IZC BSs (SS or TiA) via a double-blind, split-mouth design. BSs penetrated attached gingiva (AG) or moveable mucosa (MM) with 5 mm of soft tissue clearance. All BSs were immediately loaded and reactivated monthly with ≤14 oz (397 g or 389 cN) applied directly to the upper archwire bilaterally for 6 months to retract the maxilla to correct Class II or bimaxillary protrusion...
October 29, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30372126/mini-implant-supported-canine-retraction-with-micro-osteoperforation-a-split-mouth-exploratory-randomized-clinical-trial
#4
Saritha Sivarajan, Jennifer Geraldine Doss, Spyridon N Papageorgiou, Martyn T Cobourne, Mang Chek Wey
OBJECTIVES: To investigate, using a split-mouth randomized clinical design, the effect of micro-osteoperforation (MOP) on mini-implant supported canine retraction using fixed appliances. MATERIALS AND METHODS: Thirty subjects (seven males and 23 females) with a mean age of 22.2 (3.72) years were randomized into three canine retraction groups: Group 1 (MOP 4-weekly maxilla/8-weekly mandible; n = 10); Group 2 (MOP 8-weekly maxilla/12-weekly mandible; n = 10) and Group 3 (MOP 12-weekly maxilla/4-weekly mandible; n = 10) measured at 4-week intervals over 16 weeks...
October 29, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30324806/third-molar-tooth-agenesis-and-pattern-of-impaction-in-patients-with-palatally-displaced-canines
#5
Elham S Abu Alhaija, Fedaa T Wazwaz
OBJECTIVES: To investigate the association between third molar agenesis and pattern of impaction, missing teeth, and peg-shaped lateral incisor with palatal canine displacement (PDC). MATERIALS AND METHODS: The pretreatment orthodontic orthopantomograms of 438 patients (122 males and 316 females) diagnosed with PDC were included. A total of 338 patients with normally erupted canines who had a preexisting radiograph as part of their orthodontic treatment (125 males and 313 females) served as controls...
October 16, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30324805/esthetic-evaluation-of-facial-cheek-volume-a-study-using-3d-stereophotogrammetry
#6
Jie Feng, Hongyou Yu, Yijia Yin, Yinqiu Yan, Zheng Wang, Ding Bai, Xianglong Han
OBJECTIVES: To investigate the influence of cheek volume on facial esthetics judged by orthodontists and non-specialists. MATERIALS AND METHODS: A 25-year-old female's natural and smiling face was captured by 3D stereophotogrammetry. Cheek volume of the 3D image was altered to different degrees three-dimensionally. For the natural and smiling face, seven groups of facial images were created: decreased grade I/II/III, increased grade I/II/III, and the original one...
October 16, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30324799/long-term-follow-up-of-camouflage-effects-following-resin-infiltration-of-post-orthodontic-white-spot-lesions-in-vivo
#7
Michael Knösel, Amely Eckstein, Hans-Joachim Helms
OBJECTIVES: To reassess the long-term camouflage effects of resin infiltration (Icon, DMG, Hamburg, Germany) of white spot lesions (WSL) and sound adjacent enamel (SAE) achieved in a previous trial. The null hypothesis was tested that there were no significantly different CIE-L*a*b*-ΔE-values between WSL and SAE areas of assessment after at least 24 months (T24) compared to those at baseline (T0). MATERIALS AND METHODS: Of twenty subjects who received previous resin infiltration treatment of nteeth = 111 nonrestored, noncavitated postorthodontic WSL after multibracket treatment during a randomized controlled trial and were contacted 20 months after baseline, eight subjects (trial teeth nteeth = 40; m/f ratio 1/7; age range (mean; SD) 12-17 [15...
October 16, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30280928/cephalometric-comparison-of-adult-anterior-open-bite-treatment-using-clear-aligners-and-fixed-appliances
#8
Bella Shen Garnett, Kimberly Mahood, Mai Nguyen, Aliaa Al-Khateeb, Siqi Liu, Robert Boyd, Heesoo Oh
OBJECTIVES: To compare fixed appliances and clear aligner therapy in correcting anterior open bite and in controlling the vertical dimension in adult patients with hyperdivergent skeletal patterns. MATERIALS AND METHODS: In this retrospective study, two treatment groups of adult (≥18 years old) hyperdivergent patients (mandibular plane angles of ≥38°) with anterior open bites were included: 17 fixed appliance patients and 36 clear aligner patients. Thirteen cephalometric measurements representing the vertical dimension were reported for each group...
October 3, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30260676/do-total-or-partial-etching-procedures-effect-the-rate-of-white-spot-lesion-formation-a-single-center-randomized-controlled-clinical-trial
#9
Ahmet Yagci, Elif Dilara Seker, Kevser Kurt Demirsoy, Sabri Ilhan Ramoglu
OBJECTIVE: To determine whether total or partial etching procedures influence the appearance of white spot lesions (WSLs). MATERIALS AND METHODS: This split-mouth, double-blind, controlled, randomized study included 20 patients (mean age 16.75 years), who had class I malocclusion, mild crowding, and satisfactory oral hygiene. A total of 40 maxillary quadrants were randomly allocated to be treated using a total etching (TE) or partial etching (PE) protocol. Quantitative light fluorescence images were captured at the beginning and at 3 (T1) and 6 (T2) months after beginning orthodontic treatmen, as well as when the debonding phase of orthodontic treatment was complete (T3)...
September 27, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30239218/orthodontic-appliances-did-not-increase-risk-of-dental-caries-and-periodontal-disease-under-preventive-protocol
#10
Ana Zilda Nazar Bergamo, Katharina Morant Holanda de Oliveira, Mírian Aiko Nakane Matsumoto, Cássio do Nascimento, Fábio Lourenço Romano, Raquel Assed Bezerra da Silva, Lea Assed Bezerra da Silva, Paulo Nelson-Filho
OBJECTIVES: To assess periodontal parameters and microbial species levels after orthodontic appliance placement in patients who received oral hygiene instructions and who were monitored and motivated throughout the study. MATERIALS AND METHODS: The Periodontal Index was recorded and saliva collection was performed before (T0) and 30 (T1), 60 (T2), and 90 (T3) days after orthodontic appliance placement in 15 patients (mean age 17.53 ± 8.0 years). Analysis was carried out using checkerboard DNA-DNA hybridization...
September 21, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30230378/three-dimensional-study-of-the-upper-airway-in-different-skeletal-class-ii-malocclusion-patterns
#11
Fernando C Brito, Daniel P Brunetto, Matilde C G Nojima
OBJECTIVES: To characterize upper airway volume and morphology in patients with different skeletal patterns of Class II malocclusion compared to Class I. MATERIALS AND METHODS: A total of 197 individuals who had cone-beam computed tomography were allocated into groups according to ANB, SNA, and SNB angles (Class I, Class II maxillary protrusion, Class II mandibular retrusion), each subdivided into hypodivergent, normal, and hyperdivergent. Nasopharynx (NP), oropharynx (OP), and hypopharynx (HP) were assessed with three-dimensional image reconstruction software...
September 19, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30230377/effect-of-loaded-orthodontic-miniscrew-implant-on-compressive-stresses-in-adjacent-periodontal-ligament
#12
Mhd Hassan Albogha, Ichiro Takahashi
OBJECTIVES: To describe the relationship between the proximity of miniscrew implants (MSIs) to the periodontal ligament (PDL) and stress in the PDL under different load magnitudes and different bone properties. MATERIALS AND METHODS: Sixteen subject-specific finite element models of the region of the maxillary first molar and second premolar were developed using computed tomography images of four patients. For each patient, an MSI surface model derived from micro-computed tomography was placed at four different distances from the premolar PDL...
September 19, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30230376/reliability-and-reproducibility-of-the-method-of-assessment-of-midpalatal-suture-maturation-a-tomographic-study
#13
Natália Maria Vieira Barbosa, Ana Cláudia de Castro Ferreira Conti, Leopoldino Capelozza-Filho, Renata Rodrigues de Almeida-Pedrin, Mauricio de Almeida Cardoso
OBJECTIVES: To assess reliability and reproducibility of the individual assessment of midpalatal suture maturation in computed tomography among orthodontists and radiologists for potential diagnosis application. MATERIALS AND METHODS: Sixty axial slices from cone-beam computed tomography and multi-slice CT scans of patients aged between 11 and 21 years old (33 females and 27 males) were selected. For the investigation of reliability and reproducibility of the method, two groups of examiners were established...
September 19, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30230375/a-comparative-assessment-of-bracket-survival-and-adhesive-removal-time-using-flash-free-or-conventional-adhesive-for-orthodontic-bracket-bonding-a-split-mouth-randomized-controlled-clinical-trial
#14
Thorsten Grünheid, Brent E Larson
OBJECTIVES: To compare bracket survival and adhesive removal time between a flash-free and a conventional adhesive for orthodontic bracket bonding. MATERIALS AND METHODS: Forty-five consecutive patients had their maxillary incisors, canines, and premolars bonded with ceramic brackets using a flash-free adhesive (APC Flash-Free Adhesive, 3M Unitek, Monrovia, Calif) on one side and a conventional adhesive (APCII Adhesive, 3M Unitek) on the other side. The side allocation was randomized...
September 19, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30221984/effects-of-unilateral-nasal-obstruction-on-the-characteristics-of-jaw-closing-muscles-in-growing-rats
#15
Huan Tang, Ikuo Yonemitsu, Yuhei Ikeda, Kenzo Watakabe, Shunichi Shibata, Jun Hosomichi, Ono Takashi
OBJECTIVES: Mouth breathing caused by nasal obstruction (owing to abnormal pressure of masticatory muscles) affects craniofacial growth and development. The influence of unilateral nasal obstruction on jaw-closing muscles was investigated in rats to reveal one of the etiologic mechanisms. MATERIALS AND METHODS: Forty 8-day-old male Wistar rats were used in this study. Experimental rats were subjected to left-sided nasal obstruction by burning the external nostril tissue at the age of 8 days...
September 17, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30207486/the-longevity-of-casein-phosphopeptide-amorphous-calcium-phosphate-fluoride-varnish-s-preventative-effects-assessment-of-white-spot-lesion-formation
#16
Moufida Abufarwa, Amal Noureldin, Phillip M Campbell, Peter H Buschang
OBJECTIVES: To test how long casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) fluoride varnish prevents enamel demineralization in vitro. MATERIALS AND METHODS: Human molars and premolars were sectioned buccolingually and randomly assigned to two groups. Standardized pretreatment images of enamel surfaces were obtained using FluoreCam. The control group received no treatment, and the experimental group received an application of CPP-ACP fluoride varnish...
September 12, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30203984/evaluation-of-miniscrew-stability-using-an-automatic-embedding-auxiliary-skeletal-anchorage-device
#17
Yasuhiko Oga, Hiroshi Tomonari, Sangho Kwon, Takaharu Kuninori, Takakazu Yagi, Shouichi Miyawaki
OBJECTIVE: To clarify the in vivo effect of an automatic embedding device on miniscrew stability. MATERIALS AND METHODS: 42 miniscrews were implanted into rabbit femurs. The miniscrews with the novel auxiliary device formed the auxiliary group (n = 11 at 4 weeks; n = 11 at 8 weeks) and the miniscrews without the auxiliary device formed the nonauxiliary control group (n = 9 at 4 weeks; n = 11 at 8 weeks). Cortical bone thickness, distance from the cortical bone surface to the miniscrew head, and implantation depth of the spike were measured using micro-computed tomography...
September 1, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30183324/optimal-antero-posterior-position-of-the-maxillary-central-incisors-and-its-relationship-to-the-forehead-in-adult-african-american-females
#18
Matthew P Gidaly, Timothy Tremont, Chee Paul Lin, Chung How Kau, Nada M Souccar
OBJECTIVES: To determine an optimal anteroposterior (AP) position of the maxillary central incisors and their relationship to the forehead in adult African American (AA) females. MATERIALS AND METHODS: Smile profile photographs of 150 AA females were acquired and divided into an optimal control group (N = 48) and a study group (N = 102) based on the position of the maxillary central incisors, as judged by a panel of orthodontists and orthodontic residents. The AP position of the maxillary central incisors and the forehead inclination (FI) were measured relative to Glabella vertical (GV)...
September 1, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30141695/management-of-a-class-i-malocclusion-with-traumatically-avulsed-maxillary-central-and-lateral-incisors
#19
Nesrine Z Mostafa, Anthony P G McCullagh, David B Kennedy
This case report describes orthodontic space closure for managing an avulsed maxillary central incisor and a lateral incisor in a growing girl with a Class I deep bite malocclusion with moderate lower and mild upper crowding. The treatment approach moved a central incisor across the midline and substituted a lateral incisor for a central incisor, in combination with canine substitution. Veneers on all maxillary anterior teeth attained acceptable esthetics. The right central incisor was moved to serve as the avulsed left central incisor...
August 24, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30124320/nonsurgical-and-nonprosthetic-camouflage-treatment-of-skeletal-class-ii-open-bite-with-bilaterally-missing-lower-first-molars
#20
Tung Nguyen, Eui Seon Baek, Soonshin Hwang, Kyung-Ho Kim, Chooryung J Chung
This report illustrates the successful nonsurgical and nonprosthetic camouflage treatment of a skeletal Class II open bite malocclusion combined with missing mandibular first molars bilaterally. In the mandible, the second and third molars were uprighted and protracted, substituting for the missing first molars. In the maxilla, anterior bodily retraction and full-arch intrusion were achieved following premolar and second molar extraction, which also induced autorotation of the mandible. The treatment outcome and prognosis were confirmed with three-dimensional superimposition techniques, along with long-term stability...
August 20, 2018: Angle Orthodontist
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