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Reconstruction of mandible

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https://www.readbyqxmd.com/read/28627358/long-term-changes-in-bone-height-after-mandibular-reconstruction-using-a-free-fibula-graft-in-an-elderly-population
#1
Kosuke Ishikawa, Yuhei Yamamoto, Hiroshi Furukawa, Yoichi Ohiro, Akira Satoh, Toshihiko Hayashi
PURPOSE: This study evaluated short-term and long-term changes in bone height after mandibular reconstruction using an osteotomized fibula graft, with the aim of identifying factors associated with atrophy of the graft in an elderly population. PATIENTS AND METHODS: This retrospective study involved patients who underwent mandibular reconstruction using a free vascularized fibula graft from 2005 through 2015 and had at least 12 months of follow-up. Postoperative panoramic radiographs were used to measure bone height at standardized locations on each segment of the graft at 1 year postoperatively and at later follow-up...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28623681/soft-tissue-changes-measured-with-three-dimensional-software-provides-new-insights-for-surgical-predictions
#2
Yu-Jen Chang, Antônio C O Ruellas, Marilia S Yatabe, Philip M Westgate, Lucia H S Cevidanes, Sarandeep S Huja
PURPOSE: Although computer-aided craniofacial reconstructions allows for simulation of hard tissue changes, the prediction of the final soft tissue facial changes remains a challenge. The purpose of the present study was to evaluate the 3-dimensional (3D) soft tissue changes in patients undergoing 2-jaw orthognathic surgery. PATIENTS AND METHODS: For the present retrospective cohort study, 40 consecutive patients (11 men and 29 women; mean age 23.5 ± 4.9 years) who had undergone 2-jaw orthognathic surgery were selected...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28616153/a-multidisciplinary-approach-to-the-successful-management-of-gorlin-syndrome
#3
Ryan N Mello, Zaki Khan, Umar Choudry
Gorlin-Goltz syndrome (GGS) is a rare genetic syndrome with variable expressivity and autosomal dominant inheritance. The major features of GGS include numerous basal cell carcinomas (BCCs), keratocysts of the jaw, palmar/plantar pits and calcification of the falx cerebri. Authors report the case of a 51-year-old male with a 19-year history of GGS and multiple BCCs of the head and neck. He presented with a large ulcerating lesion on the right side of his face involving cutaneous, subcutaneous and muscular tissues of the temporal and orbital region...
June 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28609498/treatment-of-a-mandibular-glandular-odontogenic-cyst-with-peripheral-ostectomy-bone-allograft-and-implant-reconstruction-a-case-report
#4
Christopher T Barth, John A Chamberlain, Jeffrey R Wessel
This article reports on a case of a glandular odontogenic cyst (GOC) in the posterior mandible of a 25-year-old male treated with peripheral ostectomy, bone allograft, and an implant-supported fixed dental prosthesis. During a routine 3-month postoperative visit, a radiograph suggested vertical bone loss on the implant in the location of the mandibular right first molar. The three-walled defect was surgically treated with debridement, bone allograft, and a membrane. Healing of this site has been uneventful...
July 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28606440/mandible-reconstruction-with-free-fibula-flaps-outcome-of-a-cost-effective-individual-planning-concept-compared-with-virtual-surgical-planning
#5
Niklas Rommel, Marco Rainer Kesting, Nils Hagen Rohleder, Florian Martin Josef Bauer, Klaus-Dietrich Wolff, Jochen Weitz
PURPOSE: The free osteomyocutaneous fibular flap has become one of the primary options for mandibular reconstruction, because of the later introduction and development of virtual surgical planning (VSP). However, VSP is associated with high additional pre-operative effort and costs. Therefore, the purpose of the study was to develop a new individual cost-effective pre-operative planning concept for free fibula mandible reconstruction and to compare it with VSP regarding clinical parameters and post-operative outcome...
May 9, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28600917/application-of-combined-osteotomy-and-reconstruction-pre-bent-plate-position-corppp-technology-to-assist-in-the-precise-reconstruction-of-segmental-mandibular-defects
#6
Ye Liang, Canhua Jiang, Limeng Wu, Wenjin Wang, Yonggang Liu, Xinchun Jian
PURPOSE: To introduce and evaluate the clinical effects of digital surgical guide plate technology in the combined osteotomy and reconstruction pre-bent plate position (CORPPP) technique during mandibular segmental resections. MATERIALS AND METHODS: Seven cases of mandibular segmental resection with simultaneous vascularized free fibula flap reconstruction by oral and maxillofacial surgery were selected (Xiangya Hospital, Changsha, China; June 2015 through December 2015)...
May 15, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28579246/neocondylar-formation-after-resection-of-the-mandible-and-reconstruction-with-a-vascularised-iliac-crest-free-flap-rare-case
#7
S Bin, Z Bin, D Baoxia, W Yue, Z Wei
Tumours in the mandible often necessitate the removal of both mandibular and condylar bone. A free vascularised bone flap is a common choice for reconstruction, but it is rare for adults to form a new condyle after it. We describe a patient in whom a new condyle did form after reconstruction with a vascularised iliac crest free flap.
June 1, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28573552/autogenous-bone-grafts-in-oral-implantology-is-it-still-a-gold-standard-a-consecutive-review-of-279-patients-with-456-clinical-procedures
#8
Andreas Sakkas, Frank Wilde, Marcus Heufelder, Karsten Winter, Alexander Schramm
BACKGROUND: This study assessed the clinical outcomes of graft success rate and early implant survival rate after preprosthetic alveolar ridge reconstruction with autologous bone grafts. METHODS: A consecutive retrospective study was conducted on all patients who were treated at the military outpatient clinic of the Department of Oral and Plastic Maxillofacial Surgery at the military hospital in Ulm (Germany) in the years of 2009 until 2011 with autologous bone transplantation prior to secondary implant insertion...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28566674/a-stability-evaluation-of-a-novel-titanium-dental-implant-interconnected-porous-hydroxyapatite-complex-under-functional-loading-conditions
#9
Kazuya Doi, Takayasu Kubo, Shiho Kajihara, Yusuke Makihara, Hiroshi Oue, Yoshifumi Oki, Vittoria Perrotti, Adriano Piattelli, Yasumasa Akagawa, Kazuhiro Tsuga
The aim of this study was to evaluate the stability of implant/interconnected porous calcium hydroxyapatite complex (implant/IPCHA-complex) under functional loading. Implant/IP-CHA-complexes were placed into the mandibles of four Beagle-Labrador hybrid dogs (complex-group). On the other side, an implant was placed directly (control-group). To subject the loading, the animals were fed a hard diet throughout the loading phase of 5 months. The implant stability quotients (ISQs) and bone implant contact (BIC), and histological evaluations were performed...
May 30, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28558778/test-retest-reliability-of-mandibular-morphology-measurements-on-cone-beam-computed-tomography-synthesized-cephalograms-with-random-head-positioning-errors
#10
Hsien-Shu Lin, Yunn-Jy Chen, Hsuan-Lun Lu, Tung-Wu Lu, Chien-Chih Chen
BACKGROUND: Cephalometric radiography has been used for orthodontic and surgical treatment planning and assessment, and for quantifying mandibular growth. However, it remains unclear how head positioning errors and the level of examiner experience affect the reliability of such morphometric measurements. The current study aimed to bridge the gap by determining the intra-, inter-rater, and inter-session reliability of measurements of mandibular morphology with random head positioning errors as measured by a junior and a senior dentist...
May 30, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28552201/increasing-the-accuracy-of-mandibular-reconstruction-with-free-fibula-flaps-using-functionalized-selective-laser-melted-patient-specific-implants-a-retrospective-multicenter-analysis
#11
Majeed Rana, Shih-Jan Chin, Thomas Muecke, Marco Kesting, Alexander Groebe, Bjoern Riecke, Max Heiland, Nils-Claudius Gellrich
In this study, selective laser melted patient specific functional implants (PSFI) were utilised in combination with a fibula free flap, for mandible reconstruction. The shape and length of the PSFI, the shaping of fibula graft, its angulation and the length of the screws, were virtually planned before the surgery. Information, such as resection margin and screw lengths, were coded on the implant. 22 patients were reconstructed with PSFI and fibula transplantation. Data collected related to the size of the defect, pre- and postoperative intercondylar distance, ischemia time, time consumed to shape the fibula graft and complications...
April 19, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28551338/evaluation-of-the-bone-margin-in-oral-squamous-cell-carcinoma
#12
REVIEW
Joshua E Lubek, Kelly R Magliocca
Squamous cell carcinoma is the most common cancer within the oral cavity. Bone invasion involving the maxilla or mandible is reported in up to 50% of tumors on initial presentation. Although conflicting data exist, true bone invasion is thought to negatively affect risk of recurrence and long-term prognosis. The ultimate goal is to identify accurately bone invasion preoperatively and intraoperatively, because it affects the treatment plan. This article focuses on methods of evaluation of the bone margin in the preoperative and intraoperative setting, discussing the implications for prognostic, staging, and reconstructive methods...
May 24, 2017: Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/28542040/failure-of-osseointegrated-dental-implant-after-alveolar-nerve-transposition-a-report-of-an-unusual-complication-and-surgical-management
#13
Renato da Costa Ribeiro, Anibal Henrique Barbosa Luna, Cássio Edvard Sverzut, Alexander Tadeu Sverzut
PURPOSE: To describe an unusual case of mandibular fracture after osseointegrated dental implant removal placed after inferior alveolar nerve transposition. REPORT OF CASE: The patient underwent inferior nerve transposition for implant placement due to lack of interarch space. Two months after metal-ceramic crowns installation, the patient began to complain of pain in the region of the implant. In an attempt to remove the implant, there was a fracture of the implant, and only two third of it was removed, leaving only the apical portion of the implant in the mandible...
May 24, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28536534/a-bio-realistic-finite-element-model-to-evaluate-the-effect-of-masticatory-loadings-on-mouse-mandible-related-tissues
#14
Alexander Tsouknidas, Lucia Jimenez-Rojo, Evangelos Karatsis, Nikolaos Michailidis, Thimios A Mitsiadis
Mice are arguably the dominant model organisms for studies investigating the effect of genetic traits on the pathways to mammalian skull and teeth development, thus being integral in exploring craniofacial and dental evolution. The aim of this study is to analyse the functional significance of masticatory loads on the mouse mandible and identify critical stress accumulations that could trigger phenotypic and/or growth alterations in mandible-related structures. To achieve this, a 3D model of mouse skulls was reconstructed based on Micro Computed Tomography measurements...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28531204/messinian-age-and-savannah-environment-of-the-possible-hominin-graecopithecus-from-europe
#15
Madelaine Böhme, Nikolai Spassov, Martin Ebner, Denis Geraads, Latinka Hristova, Uwe Kirscher, Sabine Kötter, Ulf Linnemann, Jérôme Prieto, Socrates Roussiakis, George Theodorou, Gregor Uhlig, Michael Winklhofer
Dating fossil hominids and reconstructing their environments is critically important for understanding human evolution. Here we date the potentially oldest hominin, Graecopithecus freybergi from Europe and constrain the environmental conditions under which it thrived. For the Graecopithecus-bearing Pikermi Formation of Attica/Greece, a saline aeolian dust deposit of North African (Sahara) provenance, we obtain an age of 7.37-7.11 Ma, which is coeval with a dramatic cooling in the Mediterranean region at the Tortonian-Messinian transition...
2017: PloS One
https://www.readbyqxmd.com/read/28529102/comparative-study-of-three-kinds-of-fibula-cutting-guides-in-reshaping-fibula-for-the-reconstruction-of-mandible-an-accuracy-simulation-study-in%C3%A2-vitro
#16
Zhiwei Dong, Bei Li, Rui Xie, Qin Wu, Li Zhang, Shizhu Bai
OBJECTIVES: In order to get predictable reassembling and higher accuracy in the reconstruction of the mandible, we designed three kinds of fibula cutting guides: (1) Two-edge wide groove guide (WGG); (2) Two-edge narrow groove guide (NGG); and (3) One-edge guide (OEG). The purpose of this study was to compare the accuracy of fibula remodelling using the three kinds of fibula cutting guides above in a simulation procedure in vitro. MATERIALS AND METHODS: Cutting and reshaping of fibula analogs were guided by the three kinds of guides mentioned above...
April 22, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28523324/anatomical-features-and-prosthetic-considerations-of-edentulous-patients-with-mandibular-reconstruction-with-autograft-performed-more-than-40-years-ago
#17
Cătălina Murariu-Măgureanu, Cristina Teodora Preoteasa, Laura Iosif, Marina Imre, Marian Cuculescu, Elena Preoteasa
In this manuscript there are presented two cases, both with mandibular reconstruction with autograft harvested from the iliac crest, performed more than 40 years ago, but with different bone defect etiology, i.e., mandibular dysplasia and mandibular fracture, both having currently extensive tooth loss in the mandible, being in need for prosthetic rehabilitation. These cases confirm that reconstructive surgery of mandibular bone defects with autograft from iliac crest has a satisfactory long-term outcome, providing acceptable conditions for prosthetic rehabilitation...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28523085/free-bone-grafts-for-mandibular-reconstruction-in-patients-who-have-not-received-radiotherapy-the-6-cm-rule-myth-or-reality
#18
Baljeet Nandra, Tirbod Fattahi, Tim Martin, Prav Praveen, Rui Fernandes, Sat Parmar
Bony reconstruction of the mandible after surgical resection results in improved rehabilitation and aesthetics. Composite tissue transfer has transformed reconstruction, particularly in patients who have received radiotherapy. However, there is morbidity related to free tissue transfer. Free nonvascularized bone grafts have much lower morbidity. Surgeons believe that free bone grafts greater than 6.0 cm are prone to failure. The aims of this study was to assess whether bone grafts greater than 6.0 cm in length have a high risk of failure...
June 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/28516962/design-of-a-customised-bridging-mandibular-prosthesis-for-complex-reconstruction-a-pilot-study
#19
A Tarsitano, S Battaglia, A Sandi, C Marchetti
The gold standard for mandibular reconstruction is universally recognised and consists of the replacement of the bony part of the mandible with a bony microvascular free flap supported by a reconstructive plate. Although this procedure is feasible and reproducible in most patients, at times poor oncological prognosis or poor performance status force surgeons to consider other reconstructive solutions. In these cases, the main alternative in reconstructing a mandibular defect is represented by bridging plates combined with soft tissue flaps...
June 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28495410/a-case-and-control-multisite-positive-controlled-prospective-study-of-the-safety-and-effectiveness-of-immediate-inferior-alveolar-nerve-processed-nerve-allograft-reconstruction-with-ablation-of-the-mandible-for-benign-pathology
#20
John R Zuniga, Fayette Williams, Daniel Petrisor
PURPOSE: This study determined whether immediate reconstruction of the inferior alveolar nerve with a long (>4.5 cm) processed nerve allograft (PNA) in conjunction with simultaneous ablation and reconstruction of the mandible would be effective in safely restoring subjective sensation and achieving functional sensory recovery. MATERIALS AND METHODS: Patients (5 to 70 yr old) requiring resection of the unilateral or bilateral mandible for benign pathology were included...
April 13, 2017: Journal of Oral and Maxillofacial Surgery
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