scholarly journals Pterygoid Implants, A Treatment Option

2018 ◽  
Vol 3 (1) ◽  
pp. 767-769
Author(s):  
Jorge Gatica ◽  
Rodolfo Fonfach
Keyword(s):  
Bone Quality ◽  
Alveolar Bone ◽  
Surgical Techniques ◽  
Probability Of Failure ◽  
Bone Volume ◽  
Excessive Force ◽  
Pterygoid Process ◽  
Posterior Maxilla ◽  
Complex Procedure ◽  
Maxillary Sinuses

The partially edentulous in the posterior maxilla bone is produced mainly by the loss of molars due to caries, periodontal disease and excessive force supported by the teeth of this sector. Dental implants greater than 10 mm, are rarely placed in this area due to a higher probability of failure for the low bone volume and bone quality poor. In the skull, in the post jawbone relationship, we find a pterygomaxillary buttress. This allows, in some situations, the rehabilitation of atrophic jaws by placing implants with a parasinusal angulation, avoiding surgical techniques or more complex procedure. The pterygoid implant is a possible treatment to rehabilitate the atrophic posterior maxilla, anchored in cortical bone of the pterygoid process. A case of placement of pterygoid implants in a woman 58 years old with a large pneumatization in both maxillary sinuses, with a remaining alveolar bone 1-2 mm is reported.

scholarly journals Osteotome-Mediated Sinus Lift without Grafting Material: A Review of Literature and a Technique Proposal

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Silvio Taschieri ◽  
Stefano Corbella ◽  
Massimo Saita ◽  
Igor Tsesis ◽  
Massimo Del Fabbro
Keyword(s):  
Survival Rate ◽  
Maxillary Sinus ◽  
Alveolar Bone ◽  
Bone Volume ◽  
Large Sample Size ◽  
Sinus Augmentation ◽  
Lifting Technique ◽  
Maxillary Sinus Augmentation ◽  
Posterior Maxilla ◽  
Grafting Materials

Implant rehabilitation of the edentulous posterior maxilla may be a challenging procedure in the presence of insufficient bone volume for implant placement. Maxillary sinus augmentation with or without using grafting materials aims to provide adequate bone volume. The aim of the present study was to systematically review the existing literature on transalveolar maxillary sinus augmentation without grafting materials and to propose and describe an osteotome-mediated approach in postextraction sites in combination with platelet derivative. The systematic review showed that high implant survival rate (more than 96% after 5 years) can be achieved even without grafting the site, with a low rate of complications. Available alveolar bone height before surgery was not correlated to survival rate. In the described case report, three implants were placed in posterior maxilla after extraction of two teeth. An osteotome-mediated sinus lifting technique was performed with the use of platelet derivative (PRGF); a synthetic bone substitute was used to fill the gaps between implant and socket walls. No complications occurred, and implants were successfully in site after 1 year from prosthetic loading. The presented technique might represent a viable alternative for the treatment of edentulous posterior maxilla with atrophy of the alveolar bone though it needs to be validated by studies with a large sample size.

scholarly journals Immediate Postextractional Implant Insertion in Posterior Maxilla. Therapeutic Attitude

2020 ◽  
Vol 25 (4) ◽  
pp. 70-72
Author(s):  
Dana Elena Dumitra ◽  
Vasile Nicolae
Keyword(s):  
Clinical Case ◽  
Dental Treatment ◽  
Surgical Techniques ◽  
Bone Volume ◽  
Alveolar Ridge ◽  
Therapeutic Technique ◽  
Advantages And Disadvantages ◽  
Posterior Maxilla ◽  
Therapeutic Attitude ◽  
Over Time

Abstract The immediate postextractional implant insertion is a specific way of surgical approach to implanto-prosthetic treatment. This article addresses the indications, advantages, and surgical techniques of immediate postextraction insertion, illustrated with a clinical case. Objectives: presentation of the indications, advantages and surgical procedure of immediate postextractional implant insertion. Materials and methods: The present study considered the presentation of a case in which we opted for the insertion of implants immediately postextractionally as a therapeutic attitude. Results and discussions: The advantages and disadvantages of this therapeutic technique were represented as follows. The advantage of this technique is given by the shortening of the time necessary to complete the treatment until the prosthetic phase, the disadvantage being represented by the insertion of the implant in positions sometimes less advantageous to the prosthesis. Also, the fact that we could not preserve the alveolar ridge, keeping the bone volume necessary to insert the implant in the best position of the prosthesis by complying with the biomechanical principles, made over time, a series of complications that occurred due to vicious insertion of the implant and non-compliance with those biomechanical principles. Conclusions: The analysis of the case as a whole, represents the main premise from which any dental treatment must be started, so that the functionality of the prosthetic and aesthetic reconstruction will have to be taken into account when we choose the best treatment option.

scholarly journals Preserving Dental Alveolus Using Allograft

2018 ◽  
Vol 2 (2) ◽  
pp. 491-494
Author(s):  
Gustavo Pinto
Keyword(s):  
Bone Resorption ◽  
Dental Implant ◽  
Surgical Procedures ◽  
Tooth Loss ◽  
Alveolar Bone ◽  
Surgical Techniques ◽  
Bone Volume ◽  
Alveolar Ridge ◽  
Physiological Consequence ◽  
Successful Rehabilitation

The loss of alveolar bone volume is a physiological consequence of tooth loss, which if not done carefully preserved and becomes a significant functional and aesthetic risk for the installation of osseointegrated dental implants. The dimensional differences of the alveolar ridge can be attenuated with different graft materials and surgical procedures. The presentation of this case illustrates one of the various surgical techniques to reduce bone resorption and maintain the volume of tissue to be rehabilitated in a more predictable manner and reducing problems in the future, thus increasing the chances of successful rehabilitation osseointegrated dental implant.

Axial Triangle of the Maxillary Sinus, and its Surgical Implication With the Position of Maxillary Sinus Septa During Sinus Floor Elevation: A CBCT Analysis

2020 ◽  
Vol 46 (4) ◽  
pp. 415-422
Author(s):  
Junho Jung ◽  
Jung Soo Park ◽  
Seoung-Jin Hong ◽  
Gyu-Tae Kim ◽  
Yong-Dae Kwon
Keyword(s):  
Maxillary Sinus ◽  
Surgical Techniques ◽  
Lateral Sinus ◽  
Sinus Floor Elevation ◽  
Second Molar ◽  
Sinus Wall ◽  
Posterior Maxilla ◽  
Significant Difference ◽  
Sinus Floor ◽  
Molar Region

The aim of this study was to measure the convexity of the lateral wall of the maxillary (Mx) sinus and identify the locational distribution of antral septa in relation to the zygomaticomaxillary buttress (ZMB), in order to suggest another anatomical consideration and surgical modification of sinus floor elevation procedures. This study was designed as a cross-sectional study, and a total of 134 patients and 161 sinuses containing edentulous alveolar ridges were analyzed. The angle between the anterior and lateral walls of the Mx sinus (lateral sinus angle [LSA]), and the angle between the midpalatal line and the anterior sinus wall (anterior sinus angle [ASA]) were measured. Mean LSAs and ASAs were 105.9° ± 9.86° and 58.4° ± 6.43°, respectively. No significant difference between left and right sides was found (LSA, P = .420; right = 105.5° ± 9.27°; left = 105.5° ± 9.27° and ASA, P = .564; right = 57.9° ± 6.80°; left = 58.8° ± 6.02°). The prevalence of septa was 37.3%, and it was most frequently noted in the second molar region (32.8%), followed by the first molar (20.9%), retromolar (16.4%), and second premolar regions (14.9%). Septa were most frequently located posterior to the ZMB (49.2%), while ZMB was mostly located in the first molar region (66.4%). Narrow LSAs may complicate the surgical approach to the posterior maxilla, especially when sinus elevation should be used in the second molar region. Considering the occasional presence of antral septa, membrane elevation may be complicated when a septum is encountered during the procedure. These results suggest that 3-dimensional examination of the convexity of the Mx sinus should be performed preoperatively to choose proper surgical techniques and minimize surgical complications.

Is there a relation between local bone quality as assessed on panoramic radiographs and alveolar bone level?

2007 ◽  
Vol 12 (1) ◽  
pp. 31-35 ◽  
Author(s):  
Olivia Nackaerts ◽  
Frieda Gijbels ◽  
Anna-Maria Sanna ◽  
Reinhilde Jacobs
Keyword(s):  
Bone Quality ◽  
Alveolar Bone ◽  
Panoramic Radiographs ◽  
Local Bone ◽  
Bone Level

scholarly journals Granulocyte colony-stimulating factor (G-CSF) mediates bone resorption in periodontitis

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Hui Yu ◽  
Tianyi Zhang ◽  
Haibin Lu ◽  
Qi Ma ◽  
Dong Zhao ◽  
...  
Keyword(s):  
Bone Resorption ◽  
Alveolar Bone ◽  
Bone Volume ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Periodontal Tissues ◽  
Gingival Epithelial Cells ◽  
Trap Staining ◽  
Experimental Periodontitis ◽  
Stimulating Factor

Abstract Background Granulocyte colony-stimulating factor (G-CSF) is an important immune factor that mediates bone metabolism by regulating the functions of osteoclasts and osteoblasts. Bone loss is a serious and progressive result of periodontitis. However, the mechanisms underlying the effects of G-CSF on periodontal inflammation have yet not been completely elucidated. Here, we examined whether an anti-G-CSF antibody could inhibit bone resorption in a model of experimental periodontitis and investigated the local expression of G-CSF in periodontal tissues. Methods Experimental periodontitis was induced in mice using ligatures. The levels of G-CSF in serum and bone marrow were measured; immunofluorescence was then performed to analyze the localization and expression of G-CSF in periodontal tissues. Mice with periodontitis were administered anti-G-CSF antibody by tail vein injection to assess the inhibition of bone resorption. Three-dimensional reconstruction was performed to measure bone destruction‐related parameters via micro-computed tomography analysis. Immunofluorescence staining was used to investigate the presence of osteocalcin-positive osteoblasts; tartrate-resistant acid phosphatase (TRAP) staining was used to observe osteoclast activity in alveolar bone. Results The level of G-CSF in serum was significantly elevated in mice with periodontitis. Immunofluorescence analyses showed that G-CSF was mostly expressed in the cell membrane of gingival epithelial cells; this expression was enhanced in the periodontitis group. Additionally, systemic administration of anti-G-CSF antibody significantly inhibited alveolar bone resorption, as evidenced by improvements in bone volume/total volume, bone surface area/bone volume, trabecular thickness, trabecular spacing, and trabecular pattern factor values. Immunofluorescence analysis revealed an enhanced number of osteocalcin-positive osteoblasts, while TRAP staining revealed reduction of osteoclast activity. Conclusions G-CSF expression levels were significantly up-regulated in the serum and gingival epithelial cells. Together, anti-G-CSF antibody administration could alleviates alveolar bone resorption, suggesting that G-CSF may be one of the essential immune factors that mediate the bone loss in periodontitis.

scholarly journals How Do Parameters of Implant Primary Stability Correspond with CT-Evaluated Bone Quality in the Posterior Maxilla? A Correlation Analysis

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 270
Author(s):  
Ji-Hyun Kim ◽  
Young-Jun Lim ◽  
Bongju Kim ◽  
Jungwon Lee
Keyword(s):  
Bone Density ◽  
Bone Quality ◽  
Objective Assessment ◽  
Primary Stability ◽  
Insertion Torque ◽  
Hounsfield Units ◽  
Stability Parameters ◽  
Posterior Maxilla ◽  
Different Types ◽  
Edentulous Patients

The aim of the present study was to evaluate correlations between bone density and implant primary stability, considering various determinants such as age, gender, and geometry of implants (design, diameter). Bone density of edentulous posterior maxillae was assessed by computed tomography (CT)-derived Hounsfield units, and implant primary stability values were measured with insertion torque and resonance frequency analysis (RFA). A total of 60 implants in 30 partially edentulous patients were evaluated in the posterior maxilla with two different types of dental implants. The bone density evaluated by CT-derived Hounsfield units showed a significant correlation with primary stability parameters. The bone quality was more influenced by gender rather than age, and the type of implant was insignificant when determining primary stability. Such results imply that primary stability parameters can be used for objective assessment of bone quality, allowing surgical modifications especially in sites suspected of poor bone quality.

scholarly journals Effect of Age on Bone Structure Parameters in Laying Hens

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 570
Author(s):  
Masayoshi Yamada ◽  
Chongxiao Chen ◽  
Toshie Sugiyama ◽  
Woo Kyun Kim
Keyword(s):  
Cortical Bone ◽  
Bone Quality ◽  
Bone Mineral ◽  
Volume Fraction ◽  
Bone Structure ◽  
Bone Volume ◽  
Egg Laying ◽  
Medullary Bone ◽  
Mineral Density ◽  
Tibial Diaphysis

Changes in medullary and cortical bone structure with age remain unclear. Twenty Hy-Line W36 hens, 25 or 52 weeks of age, were euthanized, and both tibiae were collected when an egg was present in the magnum. Serial cross sections of the tibiae were stained with Alcian blue. The bones were scanned using micro-computed tomography. Trabecular width (Tb.Wi) was significantly higher (p < 0.05) in 25-week-old hens, whereas medullary bone tissue volume (TV) was significantly higher (p < 0.01) in 52-week-old hens. 25-week-old hens had significantly higher (p < 0.01) bone volume fraction (BVF = calcified tissue / TV). Moreover, the cortical bone parameters were significantly higher (TV and bone mineral content (BMC) at p < 0.05, and bone volume (BV) and BVF at p < 0.01) in younger hens. Open porosity and total porosity, which indicate less density, were significantly higher (p < 0.01) in older hens. Older hens showed significantly higher (p < 0.01) tibial diaphysis TV than younger hens. Younger hens had significantly higher (p < 0.01) BV, BVF and bone mineral density (BMD) of the tibial diaphysis. These findings reveal that reductions in medullary bone quality might be associated with age-related low estrogen levels and stimulation of osteoclastic bone resorption by parathyroid hormone. Cortical bone quality decreased with enlargement of the Haversian canals and loss of volume, with a longer egg-laying period leading to osteoporosis.

scholarly journals Other Scar Types: Optimal Functional and Aesthetic Outcome of Scarring in Cleft Patients

2020 ◽  
pp. 51-57
Author(s):  
Wouter B. van der Sluis ◽  
Nirvana S. S. Kornmann ◽  
Robin A. Tan ◽  
Johan P. W. Don Griot
Keyword(s):  
Surgical Technique ◽  
Psychosocial Functioning ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Alveolar Bone ◽  
Surgical Techniques ◽  
Anatomical Structures ◽  
Patient Dissatisfaction ◽  
Optimal Function ◽  
Scar Management

AbstractCleft lip and palate are facial and oral malformation due to failures in the embryologic craniofacial development during early pregnancy. A unilateral cleft lip and palate is the most common type, whereby the upper lip, the orbicularis muscle, the alveolar bone, the floor of the nose, and the hard and soft palate are interrupted, creating an open communication between nasopharynx and oropharynx. Patients with a cleft lip and palate are treated in specialized cleft centers by a multidisciplinary team. Having cleft lip and/or palate has a noteworthy impact on quality of life and psychosocial functioning. Postoperative scarring is a common cause of patient dissatisfaction. The goal of cleft lip surgery is to close the lip, provide optimal function in terms of speech, mastication, dental protection, breathing and feeding, and provide an aesthetically pleasing facial scar. Precise surgical technique and adequate aligning of anatomical structures is important for the postoperative aesthetic result and scar formation. Different surgical techniques are available for this purpose. Optimal scar management can be divided in surgical (precise surgical technique, planning, and adequate aligning of anatomical structures) and nonsurgical methods (botulinum toxin, silicone application, carbon dioxide fractional laser).

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