Bone morphology of the proximal femoral canal: ethnicity related differences and the influence on cementless tapered wedge stem designs

2019 ◽  
pp. 112070001989545
Author(s):  
Thies Wuestemann ◽  
Samuel G Hoare ◽  
Andreas Petersik ◽  
Bernhard Hofstaetter ◽  
Max Fehily ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Femoral Canal ◽  
Bone Morphology ◽  
Femoral Morphology ◽  
Stem Shape

Background: Differences in proximal femoral morphology between ethnicities may have implications on the design of cementless tapered wedge stems. This study analyses the differences in Asian and Caucasian bone morphology as well as the related fit of various cementless tapered wedge stem designs. Methods: A computed tomography database and modelling software was used to retrospectively analyse a total of 1345 femora. Ethnicity related comparisons as well as the fit of the stem designs were analysed. Results: Statistically significant differences between canal shape of Caucasian and Japanese as well as non-Japanese Asians were observed. The fit of the stems within the femoral canal was highly dependent on the respective stem shape. Conclusions: The shape differences in stem designs had a larger influence on the fit within the femoral canal than the differences in ethnicity related to bone morphology.

Mesial and distal alveolar bone morphology in maxillary canines moved into the grafted alveolar cleft: Computed tomography evaluation

2017 ◽  
Vol 151 (5) ◽  
pp. 869-877 ◽  
Author(s):  
Daniela Garib ◽  
Camila Massaro ◽  
Marilia Yatabe ◽  
Guilherme Janson ◽  
José Roberto P. Lauris
Keyword(s):  
Computed Tomography ◽  
Alveolar Bone ◽  
Bone Morphology ◽  
Alveolar Cleft

scholarly journals A novel method for alveolar bone grafting assessment in cleft lip and palate patients: cone-beam computed tomography evaluation

2020 ◽  
Author(s):  
Marcin Stasiak ◽  
Anna Wojtaszek-Słomińska ◽  
Bogna Racka-Pilszak
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Bone Grafting ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Alveolar Bone ◽  
Bone Architecture ◽  
Cone Beam ◽  
Bone Morphology ◽  
Alveolar Bone Grafting

Abstract Objectives This retrospective cross-sectional study aimed to present a new method for secondary alveolar bone grafting (SABG) assessment and to qualitatively evaluate the SABG results in unilateral cleft lip and palate patients. Materials and methods Research was conducted according to the STROBE guidelines. The study group consisted of 21 patients with a mean age of 16 years. High-resolution cone-beam computed tomography (CBCT) was performed at least 1 year after grafting. The experimental side was the cleft side, and the contralateral side without a congenital cleft was the control. Measurements were performed at four levels of the maxillary central incisors’ roots according to the new scale with scores from 0 to 3. The sum of the scores provided a general assessment of bone architecture. The Wilcoxon signed-rank test was used for intergroup comparisons, and a Kappa coefficient was used for reproducibility measurements. Results High individual variability was found, and the bone architecture was significantly worse on the cleft side than on the noncleft side. The results showed 28.57% failure, 33.33% poor, 19.05% moderate, and 19.05% good results from the surgical procedure. Kappa coefficients produced results from 0.92 to 1.00 for intra-rater and from 0.81 to 1.00 for inter-rater reproducibility. Conclusions CBCT provides detailed information about alveolar bone morphology. The new assessment method is useful at every treatment stage and provides excellent repeatability. SABG did not provide good bone morphology, in most cases. Clinical relevance This research presents a new universal alternative for the assessment of SABG by utilizing CBCT.

A Cone-Beam Computed Tomographic Study of Alveolar Bone Morphology in Patients With Unilateral Cleft Lip and Palate

2019 ◽  
Vol 57 (3) ◽  
pp. 273-281
Author(s):  
Najmeh Movahhedian ◽  
Mehrdad Vossoughi ◽  
Mahtab Hajati-Sisakht
Keyword(s):  
Computed Tomography ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Alveolar Bone ◽  
Cone Beam ◽  
Bone Thickness ◽  
Bone Morphology ◽  
Computed Tomographic ◽  
Control Side ◽  
Bone Height

Objective: To evaluate the bony support around the teeth adjacent to the unilateral cleft lip and palate (ULCLP) using cone-beam computed tomography. Methods and Materials: Cone-beam computed tomographies of 48 cleft-adjacent teeth (28 anterior and 20 posterior to the cleft) and 48 noncleft control teeth were evaluated. The alveolar bone thickness at 3 and 6 mm apical to the cement–enamel junction (CEJ), the distance between the alveolar crest and CEJ (Alv-CEJ), and the presence of fenestration were assessed in buccal, palatal, and proximal surfaces. Results: The alveolar bone on the buccal and palatal sides of the teeth anterior to the cleft was significantly thinner than the noncleft teeth (all P < .05). The Alv-CEJ was significantly greater on the buccal and distal surfaces of the teeth anterior to the cleft ( P < .001 and P = .010, respectively) and on the palatal and mesial surfaces of the teeth posterior to the cleft ( P = .024 and P = .003, respectively) when compared to the noncleft teeth. The frequency of reduced alveolar bone height (>2 mm) was higher than noncleft side for buccal and distal sides of the teeth anterior to the cleft ( P = .016 and .006, respectively) and the buccal and mesial sides of the teeth posterior to the cleft ( P = .008 and <.001, respectively). The teeth anterior to the cleft had a higher prevalence of fenestration ( P = .004). Conclusion: Reduced alveolar bone height is more common in the cleft side compared to the control side. The teeth anterior to the ULCLP have thinner alveolar bone support and higher frequency of fenestration.

Changes in alveolar bone morphology after traction of buccally vs palatally unilateral maxillary impacted canines: A cone-beam computed tomography study

2021 ◽  
Vol 159 (3) ◽  
pp. 258-270
Author(s):  
Gustavo Armando Ruíz-Mora ◽  
Luis Ernesto Arriola-Guillén ◽  
Yalil Augusto Rodríguez-Cárdenas ◽  
Aron Aliaga-Del Castillo ◽  
Mariana Boessio-Vizzotto ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Alveolar Bone ◽  
Cone Beam ◽  
Bone Morphology ◽  
Impacted Canines

scholarly journals The Use of a 3-Dimensional Computed Tomography Bone Database to Evaluate the Risk of Distal Contact between the Rasp Tip and the Endosteal Cortical Bone

2016 ◽  
Vol 24 (3) ◽  
pp. 312-316
Author(s):  
Emmalynn Connor ◽  
Jonathan G Cowie ◽  
Thies Wuestemann ◽  
Jonathan R Howell ◽  
Sarah L Whitehouse ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Body Size ◽  
Relative Risk ◽  
Cortical Bone ◽  
Femoral Canal ◽  
Femoral Offset ◽  
3 Dimensional ◽  
Femoral Cortex ◽  
Flare Index ◽  
To Receive

Purpose To use a 3-dimensional computed tomography (CT) bone database to evaluate the risk of distal contact between the rasp tip and the endosteal cortical bone. Methods Using a 3-dimensional CT bone database, the rasps for Exeter stems of 125 mm in length and body size 1, with a femoral offset of 37.5, 44, or 50 mm were compared with those for Exeter stems of 150 mm in length and same body size with the corresponding femoral offset. Rasp geometry was determined using an engineering drawing software. Results Of the 631 femurs in the database, 238 (187 Caucasian and 51 Asian) were of appropriate femoral offset and proximal body size to receive a stem with an offset of 37.5, 44, or 50 mm. Of these, 145 (115 Caucasian and 30 Asian) femurs were of champagne-flute type; the prevalence was comparable between the 2 populations (61% vs. 59%, p=0.729). When using the 150-mm rasp, 70 (55 Caucasian and 15 Asian) of the 238 femurs had distal contact between the rasp and femoral cortex; the prevalence was comparable between the 2 populations (29% vs. 29%, relative risk=1.0, p=1.0). Distal contact between the rasp and femoral cortex occurred more commonly in champagne-flute-type femurs than other femurs in the anteroposterior plane (28% [41/145] vs. 2% [2/93], relative risk=13.1, p<0.001) and in the mediolateral plane (27% [39/145] vs. 14% [13/93], relative risk=1.92, p=0.019). When using the 125-mm rasp, only one femur (with a canal flare index of 4.52) had distal contact in the mediolateral plane with an offset of 37.5 mm. Distal contact between the rasp and femoral cortex occurred more often with the 150-mm rasp than the 125-mm rasp in both planes (p<0.001). Conclusion The use of a shorter stem may enhance anatomic fit in patients with a narrow femoral canal and prevent distal contact between the rasp and femoral cortex.

A three-dimensional computed tomography study of distal femoral morphology in Japanese patients: Gender differences and component fit

The Knee ◽  
2014 ◽  
Vol 21 (6) ◽  
pp. 1221-1224 ◽  
Author(s):  
Masami Ishimaru ◽  
Kazunori Hino ◽  
Yoshio Onishi ◽  
Yasutake Iseki ◽  
Naohiko Mashima ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Gender Differences ◽  
Three Dimensional ◽  
Japanese Patients ◽  
Femoral Morphology
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