Biomechanical analysis of alveolar bone stress around implants with different thread designs and pitches in the mandibular molar area

2011 ◽  
Vol 16 (2) ◽  
pp. 363-369 ◽  
Author(s):  
Ting-Hsun Lan ◽  
Je-Kang Du ◽  
Chin-Yun Pan ◽  
Huey-Er Lee ◽  
Wei-Hao Chung
Keyword(s):  
Alveolar Bone ◽  
Biomechanical Analysis ◽  
Bone Stress ◽  
Mandibular Molar

Alveolar Bone Stress Around Implants With Different Abutment Angulation

2012 ◽  
Vol 21 (3) ◽  
pp. 196-201 ◽  
Author(s):  
Roozbeh Sadrimanesh ◽  
Hakimeh Siadat ◽  
Pooyan Sadr-Eshkevari ◽  
Abbas Monzavi ◽  
Peter Maurer ◽  
...  
Keyword(s):  
Alveolar Bone ◽  
Bone Stress

scholarly journals Influence of bone anatomical morphology of mandibular molars on dental implant based on CBCT

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Zhuo-lin Kong ◽  
Ge-ge Wang ◽  
Xue-ying Liu ◽  
Zhang-yan Ye ◽  
Dong-qian Xu ◽  
...  
Keyword(s):  
Alveolar Bone ◽  
Statistical Significance ◽  
Alveolar Process ◽  
Cross Sectional ◽  
Basal Bone ◽  
Mandibular Molar ◽  
Anatomical Relationship ◽  
Length Width ◽  
Implant Restoration

Abstract Background To apply CBCT to investigate the anatomical relationship between the mandibular molar and alveolar bone, aimed to provide clinical guidelines for the design of implant restoration. Methods 201 CBCT data were reevaluated to measure height of the alveolar process (EF), width of the alveolar process (GH), width of the basal bone (IJ), the angle between the long axis of the first molar and the alveolar bone (∠a) and the angle between the long axis of the alveolar bone and basal bone (∠b). The angle and width were measured to determine the implant-prosthodontic classification of the morphology in the left lower first molar (36) and right lower first molar (46). All measurements were performed on the improved cross-sectional images. Results EF, GH and IJ were measured as (10.83 ± 1.31) mm, (13.93 ± 2.00) mm and (12.68 ± 1.96) mm for 36, respectively; and (10.87 ± 1.24) mm, (13.86 ± 1.93) mm and (12.60 ± 1.90) mm for 46, respectively. No statistical significance was observed in EF, GH, IJ, ∠a and ∠b between 36 and 46 (all P > 0.05). The morphology was divided into three categories including the straight (68.7–69.2%), oblique (19.9–20.4%) and concave types (11%). Each type was consisted of two subcategories. Conclusions The proposed classification could provide evidence for appropriate selection and direction design of the mandibular molar implant in clinical. The concave type was the most difficult to implant with the highest risk of lingual perforation. The implant length, width, direction required more attention.

scholarly journals Carotid sinus nerve stimulation attenuates alveolar bone loss and inflammation in experimental periodontitis

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Aline Barbosa Ribeiro ◽  
Fernanda Brognara ◽  
Josiane Fernandes da Silva ◽  
Jaci Airton Castania ◽  
Patrícia Garani Fernandes ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Bone Loss ◽  
Alveolar Bone ◽  
Carotid Sinus ◽  
Inflammatory Responses ◽  
Periodontal Diseases ◽  
Alveolar Bone Loss ◽  
Carotid Sinus Nerve ◽  
Mandibular Molar ◽  
Inflammatory Processes

Abstract Baroreceptor and chemoreceptor reflexes modulate inflammatory responses. However, whether these reflexes attenuate periodontal diseases has been poorly examined. Thus, the present study determined the effects of electrical activation of the carotid sinus nerve (CSN) in rats with periodontitis. We hypothesized that activation of the baro and chemoreflexes attenuates alveolar bone loss and the associated inflammatory processes. Electrodes were implanted around the CSN, and bilateral ligation of the first mandibular molar was performed to, respectively, stimulate the CNS and induce periodontitis. The CSN was stimulated daily for 10 min, during nine days, in unanesthetized animals. On the eighth day, a catheter was inserted into the left femoral artery and, in the next day, the arterial pressure was recorded. Effectiveness of the CNS electrical stimulation was confirmed by hypotensive responses, which was followed by the collection of a blood sample, gingival tissue, and jaw. Long-term (9 days) electrical stimulation of the CSN attenuated bone loss and the histological damage around the first molar. In addition, the CSN stimulation also reduced the gingival and plasma pro-inflammatory cytokines induced by periodontitis. Thus, CSN stimulation has a protective effect on the development of periodontal disease mitigating alveolar bone loss and inflammatory processes.

scholarly journals Comparative effects of riboflavin, nicotinamide and folic acid on alveolar bone loss: A morphometric and histopathologic study in rats

2016 ◽  
Vol 144 (5-6) ◽  
pp. 273-279 ◽  
Author(s):  
Aysun Akpınar ◽  
Nebı Karakan ◽  
Aysan Alpan ◽  
Suat Dogan ◽  
Fahrettin Goze ◽  
...  
Keyword(s):  
Folic Acid ◽  
Bone Loss ◽  
Alveolar Bone ◽  
Alveolar Bone Loss ◽  
Water Soluble ◽  
Control Group ◽  
Serum Samples ◽  
Osteoblastic Activity ◽  
Periodontal Tissues ◽  
Mandibular Molar

Introduction. Periodontitis is a chronic inflammatory and osteolytic disease. Vitamin B complex is a class of water-soluble vitamins that play important roles in cell metabolism. Objective. The aim of this study was to evaluate the effects of riboflavin (RBF), nicotinamide (NA), and folic acid (FA) on alveolar bone loss in experimental periodontitis rat model. Methods. Sixty-four male Wistar rats were randomly divided into the following eight groups: Control, Ligated, RBF50 (RBF, 50 mg/kg daily), NA50 (NA, 50 mg/kg daily), FA50 (FA, 50 mg/kg daily), RBF100 (RBF, 100 mg/kg daily), NA100 (NA, 100 mg/kg daily), and FA100 (FA, 100 mg/kg daily). Periodontitis was induced using silk ligature around the right first mandibular molar. After 11 days the rats were sacrificed. Mandible and serum samples were collected. Changes in alveolar bone levels were measured clinically, and periodontal tissues were examined histopathologically. Serum IL-1? (pg/ml) levels were analyzed by using ELISA. Results. Mean alveolar bone loss in the mandibular first molar tooth revealed to be significantly lower in RBF100 group than in the Control group. In the Ligated group, alveolar bone loss was significantly higher than in all other groups. The ratio of presence of inflammatory cell infiltration in the Ligated group was significantly higher than in the Control group. The differences in the serum IL-1? levels between the groups were not statistically significant. Osteoclasts that were observed in the Ligated group were significantly higher than those of the Control and FA100 groups. The osteoblastic activity in the Ligated group, RBF100, and NA100 groups were shown to be significantly higher than those in the Control group. Conclusion. This study has demonstrated that systemic administration of RBF, NA, and FA in different dosages (50-100 mg/kg) reduced alveolar bone loss in periodontal disease in rats.

scholarly journals Radioanatomic image of alveolar bone crest, cementoenamel junction and dental apex in orthopantomograph 100 panoramic radiography

2007 ◽  
Vol 19 (3) ◽  
Author(s):  
Yeni Rahmawati ◽  
A. Azhari ◽  
Belly Sam
Keyword(s):  
Alveolar Bone ◽  
Panoramic Radiography ◽  
Maxillary Incisor ◽  
Entire Region ◽  
Mandibular Incisor ◽  
Average Value ◽  
Descriptive Research ◽  
Mandibular Molar ◽  
Maxillary Molar ◽  
Molar Region

Panoramic radiography can be used in most dentomaxillofacial procedures, that can give a wide coverage of teeth and supporting tissue for assisting diagnosis. The aim of this research was to obtain data about the validity of panoramic radiography for measuring radioanatomy alveolar bone crest, cementoenamel junction (CEJ), and dental apex which is useful in measuring the level of alveolar bone resorption. This descriptive research and measurement was done to 25 sample which fulfilled sample criteria from panoramic radiography result by orthopantomograph 100. This research was done with Ramfjord criteria radioanatomy point. The result of this research showed that the average value measured of alveolar bone crest from the entire region was about 41.67%, most value at the mandibular molar was about 92%, the least value at the maxillary premolar was about 0%. The average value measured of CEJ from entire region was about 11%, most value at the maxillary molar and mandibular molar about 26%, at least value at the maxillary incisor, mandibular incisor, and maxillary premolar were about 0%. The average value measured of dental apex from the entire region was about 56.33%, most value at the mandibular molar was about 96%, the least value at the maxillary premolar was about 8%. The conclusion of this research was a part of radioanatomy alveolar bone crest and a part of dental apex could be measured, while CEJ at least measured. Measurement from the three of radioanatomy point showed the mandibular molar region which was at most measured.

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