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Jin Tang, Jinzhong Zhao
In the treatment of anterior shoulder instability, there are various conditions in which a sling effect is needed to enhance anterior stability. The traditional Bristow-Latarjet procedure provides a sling effect but destroys or does not purposely protect the coracoacromial (CA) arch, which may result in superior instability. To preserve the CA arch and create a sling to enhance the anterior-inferior side of the shoulder, we introduce an arthroscopic technique to transfer the conjoined tendon-coracoid tip complex (CTCTC) with the intention to keep the CA ligament intact to the utmost...
January 2018: Arthroscopy Techniques
Jonas Lorenz, Mike Barbeck, Charles James Kirkpatrick, Robert Sader, Henriette Lerner, Shahram Ghanaati
PURPOSE: In this prospective study, the regenerative potential and pathways of a new injectable bone substitute (IBS) material composed of beta-tricalcium phosphate (β-TCP) and hyaluronan were investigated for its application in alveolar bone regeneration within extraction sockets. MATERIALS AND METHODS: The bone substitute material was implanted in 44 extraction sockets after removal of teeth not worth preserving in the maxillary and mandibular arches of 21 patients...
March 15, 2018: International Journal of Oral & Maxillofacial Implants
Robert Noelken, Maximilian Moergel, Martin Kunkel, Wilfried Wagner
OBJECTIVES: As the 2-year results for immediately inserted and provisionalized implants have been reported, it remained an open issue, whether the initially high success rates and the esthetic outcome remain stable for longer observation periods. Therefore, this prospective study examines the 5-year hard and soft tissue changes at implants placed in the anterior maxilla. MATERIAL AND METHODS: Meanwhile, 37 microthreaded implants were placed in 21 patients into extraction sockets with and without facial bone deficiencies by a flapless approach...
March 2018: Clinical Oral Implants Research
Daphne L Mourits, Dyonne T Hartong, Birgit I Lissenberg-Witte, Machteld I Bosscha, H Stevie Tan, Annette C Moll
PURPOSE: To report the cosmetic outcome and late effects of enucleation and/or irradiation for retinoblastoma and to evaluate the role of orbital implants. METHODS: Patients (age >4 years) enucleated and/or irradiated for retinoblastoma, visiting the hospital for routine follow-up (April 2013 to May 2015), were included in our cross-sectional study. Data were obtained via clinical records, questionnaires, physical measurements and standardized photographs. Two independent observers scored the cosmetic features: upper eyelid position, lower eyelid position, volume deficiency, and prosthesis motility and overall cosmetic appearance...
March 14, 2018: Acta Ophthalmologica
Youngil Kwon, Hyunjung Ko, Soojung Kim, Miri Kim
BACKGROUND/AIM: Continuous research efforts have been focusing on promoting healing of delayed replantation of avulsed teeth. The aim of this in vivo study was to assess the effect of cathepsin K inhibitor surface treatment on delayed tooth replantation.Materials and Methods Thirty-four premolar roots of four beagle dogs were extracted and conventional root canal treatment was performed. The canals were filled with gutta-percha and cement. All extracted teeth were air-dried for 1 h. Teeth were divided into two groups according to the root surface treatment prior to replantation: control (n = 13) and cathepsin K inhibitor (n = 21)...
March 13, 2018: Dental Traumatology: Official Publication of International Association for Dental Traumatology
Cristiano Tomasi, Mauro Donati, Denis Cecchinato, Isacco Szathvary, Enrico Corrà, Jan Lindhe
OBJECTIVE: To examine if (i) characteristics of the fresh extraction socket site influenced subsequent dimensional alterations and (ii) placement of deproteinized bovine mineral in the socket affected volumetric change during healing. MATERIALS AND METHODS: Twenty seven subjects and 28 extraction sites were included. Immediately after the removal of the tooth and after 6 months of healing, stone and virtual models of the jaw were produced. A cone beam computerized tomography scan was obtained immediately after extraction and the thickness of the buccal bone wall at the extraction site was measured...
March 13, 2018: Clinical Oral Implants Research
A I Mirulla, L Bragonzoni, S Zaffagnini, M Bontempi, V Nigrelli, T Ingrassia
INTRODUCTION: Traditional prosthetic solutions expose the amputee to numerous problems that limit his ability to safely perform the normal activities of daily life. In order to eliminate the problems related to the use of the traditional prosthesis with socket, a new technique was developed for fixing the prosthesis to the amputees based on the principle of osseointegration. The aim of this paper is to study and analyze the stress distribution on the interface between a trans-humeral osseointegrated prosthetic implant and the residual bone, identifying the most stressed areas and thus foreseeing possible failure phenomena of the entire prosthetic system and, after, to compare the stress distribution on three different prosthetic designs that differ from each other for some geometric characteristics...
March 7, 2018: Injury
Darren de Sa, Ajaykumar Shanmugaraj, Melissa Weidman, Devin C Peterson, Nicole Simunovic, Volker Musahl, Olufemi R Ayeni
The all-inside technique (AIT) for anterior cruciate ligament reconstruction (ACLR) is gaining popularity as a more anatomic, less invasive, technique with the potential for more rapid recovery. This systematic review aims to critically assess components of the technique, its safety profile, outcomes, and complications. PUBMED, EMBASE, and MEDLINE were searched for studies discussing primary ACLR using the AIT. Article screening, quality assessment, and data abstraction were completed in duplicate, and a minimal clinically important difference (MCID) was used to frame the descriptive results in a clinically significant context...
February 8, 2018: Journal of Knee Surgery
Sang-Joun Yu, Yoon Seon Lee, Han-Wool Choung, Yeoung-Hyun Park, Byung-Ock Kim, Joo-Cheol Park
Preameloblast-conditioned medium (PACM) has been reported as a potent dentin regenerative material, but its effects as a mixture on periodontal regeneration and the role of CPNE7 in PACM are not known. The purpose of this study is to evaluate the histologic and histomorphometric effects of preameloblast-conditioned medium (PACM) and CPNE7 on periodontal tissue healing in dogs. Seventy-two mandibular premolar roots from ten dogs were extracted and randomly divided into six groups (n = 12 each): (1) positive control group; (2) negative control group; (3) cementum-removed and PACM-treated group; (4) cementum-preserved and PACM-treated group; (5) CPNE7-inactivated PACM-treated group; and (6) recombinant CPNE7-treated group...
March 10, 2018: Journal of Molecular Histology
C E Mohn, G R Troncoso, C Bozzini, M I Conti, J J Fernandez Solari, J C Elverdin
Saliva is very important to oral health, and a salivary deficit has been shown to bring serious problems to oral health. There is scant information about the mechanisms through which salivary glands participate in post-tooth extraction socket healing. Therefore, the aim of the present study was to investigate the effect of submandibulectomy (SMx), consisting of the ablation of submandibular and sublingual glands (SMG and SLG, respectively), on PGE2 signaling and other bone regulatory molecules, such as OPG and RANKL, involved in tooth extraction socket healing...
March 10, 2018: Wound Repair and Regeneration
Maayke M P Kuijten, Jelmer S Remmers, Daphne L Mourits, Annette C Moll, Dyonne T Hartong
No abstract text is available yet for this article.
March 2018: Ophthalmic Plastic and Reconstructive Surgery
Alicia Galindo-Ferreiro, Sahar M Elkhamary, Azza Maktabi, Alberto Galvez-Ruiz, Silvana Artioli Schellini
Purpose: We report 6 patients who received a hydroxyapatite (HA) orbital implant in the socket and developed chronic orbital inflammation unresponsive to conventional medical therapy. Case Reports: We assisted 6 cases (4 males, 2 females) who received an HA orbital implant in the socket between 2015 and 2016 at King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia, and developed chronic orbital inflammation with chronic discharge, redness, and pain (onset from weeks to over 2 decades after surgery)...
September 2017: Case Reports in Ophthalmology
Roberto Crespi, Paolo Capparé, Giovanni Crespi, Giorgio Gastaldi, Georgios E Romanos, Enrico Gherlone
The aim of this study was to compare midfacial soft tissue assessment and horizontal width changes of fresh socket implants in immediate and delayed prosthetic restorations. Patients requiring extractions in the maxillary esthetic zone were recruited. In one group, 30 implants were placed using an immediate loading approach; in the second group, 30 implants were loaded after a period of 3 months. At the 4-year follow-up, statistically significant differences (P < .001) were found. Immediate implants restored on the day of surgery demonstrated more stable midfacial soft tissue levels and bone volume maintenance than delayed implants...
March 7, 2018: International Journal of Periodontics & Restorative Dentistry
Stefano Sivolella, Chiara Perin, Marco Capecchi, Valerio Buongiorno, Marialuisa Valente
Lateral periodontal cysts (LPCs) are rare odontogenic cysts of developmental origin. A 52-year-old man presented with an asymptomatic gingival swelling located between the mandibular left canine and first premolar, both of which were vital. Radiography showed a well-circumscribed radiolucent area and loss of the lamina dura around the tooth socket in contact with the lesion and of the interproximal buccal bone. The lesion was enucleated. The defect was immediately grafted with a 1:1 mixed autologous and heterologous bone graft covered with a collagen membrane...
March 7, 2018: International Journal of Periodontics & Restorative Dentistry
Federico Tirone, Stefano Salzano, Marco Pagano
Healing of extraction sockets may sometimes result in formation of fibrous tissue instead of bone, even after 4 months, an occurrence that may hinder implant placement. The aim of this preliminary observational study was to histologically evaluate quality and amount of bone regeneration after treating nonhealing sockets with a bovine-derived xenograft enriched with porcine collagen (Bio-Oss Collagen, Geistlich) without barrier membranes. Biopsy specimens were collected during implant placement, 4 months after grafting...
March 7, 2018: International Journal of Periodontics & Restorative Dentistry
Anette Preiss, Anja C Nagel, Heiko Praxenthaler, Dieter Maier
Throughout the animal kingdom, the Notch signalling pathway allows cells to acquire diversified cell fates. Notch signals are translated into activation of Notch target genes by CSL transcription factors. In the absence of Notch signals, CSL together with co-repressors functions as a transcriptional repressor. In Drosophila, repression of Notch target genes involves the CSL homologue Suppressor of Hairless (Su(H)) and the Notch (N) antagonist Hairless (H) that together form a repressor complex. Guided by crystal structure, three mutations Su(H)LL, Su(H)LLF and Su(H)LLL were generated that specifically affect interactions with the repressor H, and were introduced into the endogenous Su(H) locus by gene engineering...
2018: PloS One
Yaniv Mayer, Ofir Ginesin, Alaa Khutaba, Eli E Machtei, Hadar Zigdon Giladi
BACKGROUND: Cells, scaffolds, and growth factors are the key components in bone tissue engineering. Scaffold composition, topography, and architecture influence the amount of regenerated bone in the implantation site. The aims of the study were to compare viability and proliferation of mesenchymal stem cells (MSCs) seeded onto two commercial xenografts: Bio-Oss (BO) and bioactive bone bovine (BB). Next, these materials were compared for histomorphometric bone formation in a socket preservation model in rats...
March 6, 2018: Clinical Implant Dentistry and related Research
Mikako Tanaka, Emi Yamashita-Mikami, Kohei Akazawa, Michiko Yoshizawa, Yoshiaki Arai, Sadakazu Ejiri
BACKGROUND: Long-term changes of trabecular microstructure in human tooth extraction socket have not been investigated. PURPOSE: To examine the trabecular microstructure of human residual ridges at various intervals following tooth extraction, and to determine whether bone remodeling activity can attain points of relative stability and when such points are reached. MATERIALS AND METHODS: Forty-four bone biopsy specimens were obtained from lower molar or premolar regions of residual ridges...
March 6, 2018: Clinical Implant Dentistry and related Research
Shuyang Han, Jerry W Alexander, Vijai S Thomas, Joshua Choi, Joshua D Harris, David B Doherty, Jonathan R T Jeffers, Philip C Noble
BACKGROUND: Hip "microinstability" is commonly cited as the cause of symptoms that occur in the presence of translation of the femoral head away from conformity with the acetabular fossa. However, there is still no consistent objective criteria defining its presence and biomechanical basis. One hypothesis is that abnormal motion of the articular surfaces occurs because of capsular laxity, ultimately leading to clinical symptoms. PURPOSE: To determine the relationship between capsular laxity and abnormal rotation and translation of the hip...
March 1, 2018: American Journal of Sports Medicine
Joobin Khadamy, Pardis Khademi, Mohsen Kashkouli
We report an unusual periocular injury in a 19-year-old motorcycle rider during an accident. The patient had lacerations on the right upper and lower eyelids and the globe was enucleated en bloc. Despite disorganization of the eyelids and orbit, reconstruction of the eyelids and anophthalmic socket was successful. The primary reconstruction of the anophthalmic socket in the traumatic enucleation is a real challenge, especially when the conjunctival and the orbital tissues are missing or disorganized. It is proposed to utilize the optic nerve regeneration techniques in the cases of traumatic enucleation when the globe is intact...
December 26, 2017: Curēus
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