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Alveolar resorption

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https://www.readbyqxmd.com/read/28445371/preventing-early-stage-graft-bone-resorption-by-simultaneous-innervation-innervated-iliac-bone-flap-for-mandibular-reconstruction
#1
Lei Wang, Jian-Hua Wei, Xi Yang, Zi-Hui Yang, Mo-Yi Sun, Xiao-Bing Cheng, Li-Qun Xu, De-Lin Lei, Chen-Ping Zhang
BACKGROUND: Postoperative resorption of vascularized bone grafts jeopardizes the success of dental implant(s) and functional rehabilitation of the jaw. Recent evidence supports the crucial role of innervation in bone regeneration and turnover. METHODS: This study reports a new technique for simultaneous innervation of vascularized iliac flaps in mandibular reconstruction, through neurorrhaphy between ilioinguinal nerves, which innervate iliac bone, and inferior alveolar nerves or great auricular nerves...
May 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28422326/alveolar-ridge-dimensional-changes-following-ridge-preservation-procedure-with-novel-devices-part-3-histological-analysis-in-non-human-primate-model
#2
Yingying Su, Jianxia Tang, Seiko Min, Lijia Guo, Yitong Liu, Yilin Xie, Jimin Xiong, Songlin Wang, Mauricio G Araújo, Homayoun H Zadeh, Yi Liu
OBJECTIVES: This study sought to investigate the histological changes following tooth extraction, ridge preservation and augmentation, using novel devices designed to obturate the oral orifice of extraction sockets (SocketKAP™) and provide structural support for sockets with defective bony walls (SocketKAGE™) in a non-human primate model. MATERIAL AND METHODS: Six Macaca fascicularis were imaged by cone beam computed tomography to register their preoperative alveolar bone...
April 19, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28421873/facial-alveolar-bone-width-at-the-first-and-second-maxillary-premolars-in-healthy-patients-a-cone-beam-computed-tomography-study
#3
Julio Rojo, José Viña, David Peñarrocha, Miguel Peñarrocha
The purpose was to analyze the thickness of the facial alveolar bone at the first and second maxillary premolars and determinate the percentage of premolars that reached 2 mm in width. A retrospective study analyzing cone beam computed tomography scans from the database of the Oral Surgery Unit of the University of Valencia was performed. Patients with periodontal disease, orthodontic treatment, absence among the first maxillary molars, premolars with endodontic treatment and/or prosthetic restorations were excluded...
April 19, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28409326/effect-of-corticision-on-orthodontic-tooth-movement-in-a-rat-model-as-assessed-by-rna-sequencing
#4
Qihui Gu, Shuyu Guo, Dongyue Wang, Tingting Zhou, Lin Wang, Zhendong Wang, Junqing Ma
Corticision is a common technique to accelerate orthodontic tooth movement; however, not much is known about the underlying mechanisms. In this study, we investigated the mechanism of alveolar tissue remodeling after corticision in a rat model of tooth movement (TM) by analyzing the differential transcriptome. A total of 36 male rats were equally divided into TM and TM with corticision (TM+C) groups. Alveolar bone response was examined using micro-computed tomography (micro-CT). Osteoclasts and osteoblasts were quantified on tartrate-resistant acid phosphatase (TRAP) and Goldner's trichrome staining...
April 13, 2017: Journal of Molecular Histology
https://www.readbyqxmd.com/read/28392902/detection-of-th17-treg-cells-and-related-factors-in-gingival-tissues-and-peripheral-blood-of-rats-with-experimental-periodontitis
#5
Li Gao, Yajing Zhao, Panpan Wang, Liping Zhang, Chi Zhang, Qianying Chen, Chuanjiang Zhao
OBJECTIVES: This study aimed to investigate the role and the possible mechanisms involved in the immunoregulation of experimental periodontitis by Th17/Treg. MATERIALS AND METHODS: Experimental periodontitis was established by silk thread ligation with Porphyromonas gingivalis daubing in the bilateral maxillary second molar of Male Sprague-Dawley (SD) rats. Alveolar bones were scanned by Micro-CT. Histological examination was stained with H&E. The proportions of Th17 and Treg cells in peripheral blood were detected by flow cytometry...
March 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28390826/estimation-of-date-of-death-through-wound-healing-of-an-extraction-socket-a-case-report
#6
Joan Viciano, Ruggero D'Anastasio, Cristian D'Ovidio, Sara Costantini, Aldo Carnevale, Luigi Capasso
Surgical extraction of teeth due to dental pathologies is a relatively common procedure in modern man. The healing of the wound that results occurs in gradual and sequential stages, such that the analysis of this repair process can be very useful in forensic investigations on human remains. The following study reports on a particular case where the remodeling of a tooth socket allowed an estimation of the time that had elapsed from the day of the surgical extraction of the tooth to the time of death. The corpse was that of a woman of 34 years...
March 27, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28358289/effect-of-local-hil-10-gene-therapy-on-experimental-periodontitis-in-ovariectomized-rats
#7
Yanfen Li, Souzhi Ma, Jianbin Guo, Jun Jiang, Kai Luo, Fuhua Yan, Yin Xiao
OBJECTIVE: To investigate the effect of local hIL-10 gene therapy on experimental periodontitis in rats and to elucidate the mechanism underlying this effect. MATERIAL AND METHODS: Experimental periodontitis was induced in ovariectomized (OVX) rats using a silk ligature. We then injected 5 μg of hIL-10 plasmid with 5 μl of liposomes or 5 μg of vector plasmid with 5 μl of liposomes into the palatal side of the gingival mucosa of the upper left second molar once every two days...
May 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28343980/nerve-damage-from-bone-allografts-and-xenografts-a-case-series
#8
M Anthony Pogrel
The concept of socket preservation by placing a particulate bone allograft or xenograft into a tooth socket or on the alveolar ridge after tooth removal remains a somewhat controversial topic. The concept is that it will preserve the ridge from resorption and such that subsequent implant insertion will be easier, with fewer complications. However, one particular issue is that these materials, although not directly neurotoxic, appear to be an irritant to the nerves if they come in contact with them. We present a case series demonstrating this complication...
February 27, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28336321/the-histological-and-histomorphometric-changes-in-the-mandible-after-radiotherapy-an-animal-model
#9
Lucas J Poort, Johan H B Ludlage, Nienke Lie, Roland A Böckmann, Jim C E Odekerken, Frank J Hoebers, Peter A W H Kessler
PURPOSE: Approximately 5% of irradiated head and neck cancer patients develop osteoradionecrosis of the mandible. The current non-surgical treatment options for osteoradionecrosis have limited effects and are based on a small number of studies. Therefore, we aimed to enhance the understanding of the pathophysiology of osteoradionecrosis by investigating changes induced by external irradiation in mini-pigs. METHODS: Sixteen Göttingen mini-pigs were divided into four groups for the application in two fractions with total equivalent radiation dosages of 25, 50, 70 Gray, and one group served as control...
February 20, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28326892/clinical-and-histomorphometric-assessment-of-lateral-alveolar-ridge-augmentation-using-a-corticocancellous-freeze-dried-allograft-bone-block
#10
Roya Shariatmadar Ahmadi, Ferena Sayar, Vahid Rakhshan, Babak Iranpour, Jahanfar Jahanbani, Ahmad Toumaj, Nasrin Akhoondi
Horizontal ridge augmentation with allografts has attracted notable attention because of its proper success rate and the lack of disadvantages of autografts. Corticocancellous block allografts have not been adequately studied on humans. Therefore, this study evaluated clinically and histomorphometrically the increase in ridge with after horizontal ridge augmentation using corticocancellous block allografts, and the implant success after 12 to 18 months post-implantation. In 10 implant patients (3 women, 7 men, 45 years old on average), defective maxillary alveolar ridges were horizontally augmented using freeze-dried bone allograft blocks...
March 22, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28303642/efficacy-of-collagen-matrix-seal-and-collagen-sponge-on-ridge-preservation-in-combination-with-bone-allograft-a-randomized-controlled-clinical-trial
#11
Zuhair S Natto, Andreas Parashis, Bjorn Steffensen, Rumpa Ganguly, Matthew D Finkelman, Y Natalie Jeong
AIM: To test whether the use of collagen matrix seal (CMS) results in similar hard and soft tissue remodeling to that with collagen sponge (CS) used as barriers 4 months following alveolar ridge preservation (ARP), in combination with freeze-dried bone allograft (FDBA). MATERIALS AND METHODS: Twenty-eight patients were randomly assigned to the two groups. Clinical and radiographic measurements were recorded with the same stent at baseline and 4 months for standardization...
March 16, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28301291/histological-and-histomorphometrical-analysys-on-a-loaded-implant-with-platform-switching-and-conical-connection-a-case-report
#12
Giovanna Iezzi, Flavia Iaculli, Roberta Calcaterra, Adriano Piattelli, Michele Di Girolamo, Luigi Baggi
The association of Morse taper implant-abutment design with the use of a smaller abutment diameter (platform-switching) may improve dental implant success rate and prevent peri-implant bone loss. The aim of the present study was to histologically and histomorphometrically evaluate the behavior of peri-implant tissues around an implant with a conical connection associated with platform-switching. A platform-switched Morse-cone connection implant was inserted in the left posterior mandible in a 61-year-old patient...
March 16, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28299782/a-test-of-a-skeletal-ageing-method-based-on-resorption-of-the-alveolar-crest-following-tooth-loss-using-a-skeletal-population-of-documented-age-at-death
#13
Simon Mays
OBJECTIVES: Resorption of the alveolar process occurs following tooth loss, and appears to continue for a prolonged period. Previous study (Mays, ) with a known-age collection of human remains suggested the potential of this phenomenon for age estimation in remains of adults who have lost one or more molar teeth. This article tests this ageing technique on another known age group, and attempts to evaluate the impact of some extraneous factors on the method. MATERIALS AND METHODS: The study group comprises adult skeletons (N = 110) of documented age at death from 18th to 19th century London...
March 16, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28280758/effect-of-beta-blockers-on-number-of-osteoblasts-and-osteoclasts-in-alveolar-socket-following-tooth-extraction-in-wistar-rats
#14
Katayoun Sadr, Amirala Aghbali, Makan Sadr, Hamed Abachizadeh, Maryam Azizi, Mehran Mesgari Abbasi
STATEMENT OF THE PROBLEM: Various researchers have suggested the use of β2-adrenergic receptor antagonists in prevention or treatment of bone resorption. PURPOSE: This study aimed to evaluate the effect of β2-adrenergic receptor antagonists on number of osteoclasts and osteoblasts involved in the healing of extraction socket of maxillary first molar in rats. MATERIALS AND METHOD: Maxillary first molars of 40 rats were extracted and divided into two groups...
March 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28275784/-expression-of-stat3-in-alveolar-bone-during-orthodontic-tooth-movement-in-rats
#15
Si-Ru Zhou, Qing-Gang Dai, Peng Zhang, Na-Yong Ha, Shu-Liang Yang, Ling-Yong Jiang
PURPOSE: To study the changes of expression of signal transducer and activator of transcription 3 (STAT3) during orthodontic tooth movement (OTM). METHODS: Twenty six-week-old SD rats were selected, the upper left first molars were moved by coil spring and lasted for 7 days. The maxillary tissues were obtained at 0, 1, 3, 7 d and subjected to histological study. Statistical analysis was performed using SPSS 16.0 software package. RESULTS: The main changes in alveolar bone during orthodontic tooth movement included significant increase in osteoblast number and bone formation in the tension area, and bone resorption in the pressure area...
December 2016: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28268502/quantitative-evaluation-of-alveolar-bone-resorption-on-dental-panoramic-radiographs-by-standardized-dentition-image-transformation-and-probability-estimation
#16
Chisako Muramtsu, Ryo Takahashi, Tatsuro Hayashi, Takeshi Hara, Tatsumasa Fukui, Akitoshi Katsumata, Hiroshi Fujita
Alveolar bone resorption, which can be observed on dental panoramic radiographs (DPRs), is one of the most important signs of the progression of periodontal disease. However, quantitative and consistent evaluation of alveolar bone resorption is labor intense, because of a large number of DPR examinations performed each year. In our previous study, we developed an automated scheme for detection of three lines, corresponding to an occlusion line, an alveolar line and a root apex line, to measure the alveolar bone ratio (ABR), which may be useful to dentists in early detection of periodontal disease...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28257225/dental-space-deficiency-syndrome-an-anthropological-perspective
#17
Colin S Richman
A new syndrome in dentistry, the dental space deficiency syndrome is proposed in this article. Signs and symptoms of this entity may include one or more of the following clinical dental features: tooth crowding, gingival recession, tooth impactions, rapid resorption of facial alveolar bony plates following premature tooth loss, dentally oriented sleep disorders, extended orthodontic treatment time, and malocclusion relapse following orthodontic therapy. These oral conditions, individually or collectively, seem to be associated with both genetic and functional factors...
March 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28250998/a-novel-procedure-for-the-immediate-reconstruction-of-severely-resorbed-alveolar-sockets-for-advanced-periodontal-disease
#18
Mario Aimetti, Valeria Manavella, Luca Cricenti, Federica Romano
Background. Several clinical techniques and a variety of biomaterials have been introduced over the years in an effort to overcome bone remodeling and resorption after tooth extraction. However, the predictability of these procedures in sockets with severely resorbed buccal/lingual plate due to periodontal disease is still unknown. Case Description. A patient with advanced periodontitis underwent extraction of upper right lateral and central incisors. The central incisor exhibited complete buccal bone plate loss and a 9 mm vertical bone deficiency on its palatal side...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28248121/-unusual-histopathological-picture-of-acute-lung-injury-in-different-stages-of-resorption-with-predominance-of-organizing-pneumonia-in-a%C3%A2-young-man-with-influenza-a%C3%A2-h1n1
#19
Daniel Farkaš, Radoslav Matěj, Marián Ml Švajdler, Marcela Sluková, Jana Seligová, Lucia Fröhlichová, Silvia Farkašová Iannaccone, Vlasta Vyhnálková, Alžbeta Ginelliová
In this case report the authors describe histomorphological findings of acute lung injury with laboratory-confirmed influenza type A(H1N1) pneumonia leading to the death of a 30 year-old unvaccinated man after 27 days of hospitalisation. Histologically all three types of acute lung injuries were unusually present (diffuse alveolar damage, acute interstitial pneumonia, organizing pneumonia) in different phases of resorption and reparation with transition to extensive fibrosis.
2017: Ceskoslovenská Patologie
https://www.readbyqxmd.com/read/28231347/histomorphometric-results-after-postextraction-socket-healing-with-different-biomaterials-a-systematic-review-of-the-literature-and-meta-analysis
#20
Stefano Corbella, Silvio Taschieri, Luca Francetti, Roberto Weinstein, Massimo Del Fabbro
PURPOSE: The aim of this systematic review was to investigate which material is the most effective bone substitute for alveolar bone healing by evaluating histomorphometric outcomes after healing of postextraction sockets in humans. MATERIALS AND METHODS: A manual and electronic search (PubMed, EMBASE, Cochrane Library) was performed using a search string prepared ad hoc. Data were statistically analyzed by calculating weighted mean percentage of new bone formation (primary outcome) and weighted mean percentage of residual biomaterial, soft/connective tissue, and nonmineralized tissue (secondary outcomes) in the biopsies...
February 23, 2017: International Journal of Oral & Maxillofacial Implants
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