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2022 ◽  
Yaser Safi ◽  
Mitra Ghazizadeh Ahsaie ◽  
Ingrid Różyło‐Kalinowska ◽  
Ghassem Ansari ◽  
Mahsima Tayefi Nasrabadi ◽  

2022 ◽  
Vol 22 (1) ◽  
Jeong-Kui Ku ◽  
Junggon Lee ◽  
Hyo-Jung Lee ◽  
Pil-Young Yun ◽  
Young-Kyun Kim

Abstract Background The aim of this study was to assess the accuracy of virtual planning of computer-guided surgery based on the actual outcomes of clinical dental implant placement. Methods This retrospective study enrolled patients among whom implant treatment was planned using computer-guided surgery with cone beam computed tomography (CBCT). The patients who received implant according to the guide with the flapless and flapped approach were classified as group 1 and 2, respectively, and the others who could not be placed according to the guide were allocated to the drop-out group. The accuracy of implant placement was evaluated with the superimposition of CBCT. Results We analyzed differences in the deviated distance of the entrance point and deviated angulation of the insertion of implant fixtures. With regard to the surgical approach, group 2 exhibited greater accuracy compared to group 1 in deviation distance (2.22 ± 0.88 and 3.18 ± 0.89 mm, respectively, P < 0.001) and angulation (4.27 ± 2.30 and 6.82 ± 2.71°, respectively, P = 0.001). The limitations of guided surgery were discussed while considering the findings from the drop-out group. Conclusions Computer-guided surgery demonstrates greater accuracy in implant placement with the flapless approach. Further research should be conducted to enhance the availability of guides for cases with unfavorable residual bone conditions.

2022 ◽  
Vol 12 (1) ◽  
pp. 96
María Elena Montes-Díaz ◽  
Alicia Martínez-González ◽  
Riánsares Arriazu-Navarro ◽  
Alfonso Alvarado-Lorenzo ◽  
Nuria Esther Gallardo-López ◽  

The aim of this study is to analyze the skeletal and dentoalveolar morphological characteristics of the maxillary in subjects with a unilateral palatally impacted canine using Cone Beam Computed Tomography (CBCT). A retrospective clinical study was conducted of 100 adult patients divided into two groups: one consisting of patients with a unilaterally palatally impacted maxillary canine (GI), with the subgroups in the right and left hemiarches (GI-R and GI-L), and the second, without impacted canine, as the control group (CG). The CBCT measured skeletal variables (maxillary basal width and alveolar crest height) and dentoalveolar variables (inclination of the upper incisor, tooth lengths of incisors and canines, arch length, tooth size and bone dental discrepancy). In skeletal variables, statistically significant differences were found in alveolar crest height (ACH) in all groups and subgroups (p < 0.01). In the dentoalveolar variables, there were differences in the angle of the upper incisor (II) and lateral incisor length (LLIL) between the GI and GC and the angle of the upper incisor (II′), arch length (AL′) and arch length-tooth size discrepancy (ATD′) among the GI subgroups (p < 0.01). There are skeletal and dentoalveolar differences in patients with unilateral palatally impacted maxillary canines, with lower angular and linear measurements compared with patients without impaction.

2022 ◽  
Hanyue Zhou ◽  
Minsong Cao ◽  
Martin Ma ◽  
Stephanie Yoon ◽  
Amar Kishan ◽  

A. Rizwana ◽  
N. Mohan ◽  
P. T. Ravi Kumar ◽  
R. Karthik ◽  
Sabitha Gokulraj

AbstractCondylar hyperplasia (CH) of the mandible is a rare developmental disorder that results in enlargement of the condyle. It is predominant in females, mostly unilateral and self-limiting. This report presents a case of a 35-year-old female patient with unilateral condylar hyperplasia with an increase in vertical height of mandibular ramus of the affected side. After initial radiographic evaluation, the asymmetry index using a panoramic radiograph was determined and also analyzed using cone-beam computed tomography (CBCT). Condylar dimensions in all the planes were measured for both sides using CBCT. This case report emphasizes the importance of CBCT and its role in the diagnosis and assessment of mandibular condylar hyperplasia.

Medicine ◽  
2022 ◽  
Vol 101 (1) ◽  
pp. e28393
Linlin Wang ◽  
Zhensong Wang ◽  
Qiang Wang ◽  
Jingchao Han ◽  
Hongsheng Tian

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