Assessment of Bone Resorption after Secondary Alveolar Bone Grafting Using Three-Dimensional Computed Tomography: A Three-Year Study

2007 ◽  
Vol 44 (2) ◽  
pp. 142-148 ◽  
Author(s):  
Matthias Feichtinger ◽  
Rudolf Mossböck ◽  
Hans Kärcher
Keyword(s):  
Computed Tomography ◽  
Bone Resorption ◽  
Bone Loss ◽  
Bone Grafting ◽  
Alveolar Bone ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Alveolar Bone Grafting ◽  
Three Dimensional Models ◽  
Secondary Alveolar Bone Grafting

Objective: Secondary bone grafting plays an important role in the dental rehabilitation of patients with clefts of the lip, alveolus, and palate. A major complication of this surgical technique is resorption of the grafted bone transplant. Conventional two-dimensional radiographs are often inconclusive and do not demonstrate the true deficit. The main objective of this study was to evaluate the amount and exact location of bone loss on the basis of three-dimensional models over a period of 3 years. Design: Twenty-four patients with unilateral cleft palate were included in this prospective study. Axial computed tomography scans of all patients were taken immediately preoperatively, and 1, 2, and 3 years postoperatively. Volumetric analysis was performed on three-dimensional models of the cleft defects and the bone bridges using three-dimensional computed tomography. Interventions: All patients were treated by secondary alveolar bone grafting prior to eruption of the permanent canine. Results: Extensive bone resorption was found in the bucco-palatal dimension of the alveolar portion of the transplant. The success rate of secondary bone grafting was high in cases of rapid orthodontic gap closures. The mean bone loss in the first year after surgery was 49.5%. The transplants remained almost constant in the following 2 years. Conclusions: Radiographic scales based on orthopantomography only evaluate the vertical dimension of the transplants. This study, however, showed that bone resorption in the transversal dimension is clearly underestimated with conventional two-dimensional radiographs.

Volumetric Assessment of Secondary Alveolar Bone Grafting Using Cone Beam Computed Tomography

2009 ◽  
Vol 46 (5) ◽  
pp. 503-511 ◽  
Author(s):  
Snehlata Oberoi ◽  
Radhika Chigurupati ◽  
Pawandeep Gill ◽  
William Y. Hoffman ◽  
Karin Vargervik
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Bone Grafting ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Alveolar Bone ◽  
Cone Beam ◽  
Alveolar Bone Grafting ◽  
Bilateral Cleft Lip ◽  
Secondary Alveolar Bone Grafting

Objective: To assess the radiographic outcome of secondary alveolar bone grafting in individuals with nonsyndromic unilateral or bilateral cleft lip and palate using cone beam computed tomography. Methods: This prospective study was conducted at the University of California at San Francisco Center for Craniofacial Anomalies on 21 consecutive nonsyndromic complete cleft lip and palate individuals between 8 and 12 years of age who required alveolar bone grafting. Seventeen unilateral and four bilateral cleft lip and palate individuals had preoperative and postoperative cone beam computed tomography scans that were analyzed using Amira 3.1.1 software. Results: The average volume of the preoperative alveolar cleft defect in unilateral cleft lip and palate was 0.61 cm3, and the combined average volume of the right and left alveolar cleft defects in bilateral cleft lip and palate was 0.82 cm3. The average percentage bone fill in both unilateral cleft lip and palate and bilateral cleft lip and palate was 84%. The outcome of alveolar bone grafting was assessed in relation to (1) type of cleft, (2) size of preoperative cleft defect, (3) presence or absence of lateral incisor, (4) root development stage of the maxillary canine on the cleft side, (5) timing, and (6) surgeon. None of these parameters significantly influenced the radiographic outcome of alveolar bone grafting. Conclusions: Secondary alveolar bone grafting of the cleft defect in our center was successful, based on radiographic outcome using cone beam computed tomography scans. Volume rendering using cone beam computed tomography and Amira software is a reproducible and practical method to assess the preoperative alveolar cleft volume and the adequacy of bone fill postoperatively.

scholarly journals Use of Three-Dimensional Computed Tomography to Classify Filling of Alveolar Bone Grafting

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Antonio Jorge V. Forte ◽  
Renato da Silva Freitas ◽  
Nivaldo Alonso
Keyword(s):  
Bone Grafting ◽  
Alveolar Bone ◽  
Three Dimensional ◽  
Unaffected Side ◽  
Alveolar Cleft ◽  
Alveolar Bone Grafting ◽  
Grade Ii ◽  
And Function ◽  
Mean Time ◽  
Secondary Alveolar Bone Grafting

Several authors have proposed classifications to analyze the quality over time of secondary alveolar bone grafting. However, little discussion has been held to quantitatively measure the secondary bone grafting for correction of nasal deformity associated to cleft palate and lip. Twenty patients with unilateral alveolar cleft, who underwent secondary alveolar bone grafting, were studied with 3D computer tomography. The height between the inferior portion of the pyriform aperture and the incisal border of the unaffected side (height A) and the affected side (height B) was measured using a software Mirror. A percentage was then obtained dividing the height B by the height A and classified into grades I, II, and III if the value was greater than 67%, between 34% and 66%, or less than 33%. Age, time of followup, initial operation, and age of canine eruption were also recorded. All patients presented appropriate occlusion and function. Mean time of followup was 7 years, and mean initial age for operation was 10 years old. 16 patients were rated as grade I and 4 patients as grade II. No cases had grade III. We present a new grading system that can be used to assess the success of secondary bone grafting in patients who underwent alveolar cleft repair.

scholarly journals Two-Dimensional Intra-Oral Radiographs Compared to Three-Dimensional CBCT at Six-Month Post-Operative Evaluation of Secondary Bone-Grafting in Patients with Cleft Lip and Palate

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Wiedel A P ◽  
◽  
Svensson H ◽  
Hellén-Halme K ◽  
Ghaffari H ◽  
...  
Keyword(s):  
Bone Grafting ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Alveolar Bone ◽  
Three Dimensional ◽  
Treatment Decision ◽  
Clinical Findings ◽  
Two Dimensional ◽  
Alveolar Bone Grafting ◽  
The Mean

Background: The aim of this study was to investigate whether a complementary Cone-Beam Computed Tomography (CBCT) in patients with Cleft Lip and Palate (CLP) after alveolar bone-grafting to clefts gave substantial additional information, and particularly whether such new information had any implications for the further care of the patients. Methods: Seventeen children, with complete CLP, 10 unilateral and seven bilateral clefts, in all 24 clefts, were evaluated six months after secondary alveolar bone-grafting with two-dimensional intra-oral radiographs complemented with CBCT. The mean age at bone-grafting was 8.8 years. Three different examiners evaluated the radiographic documentation. Results: The mean pre-operative cleft width was 5.8mm. In 15 of the 24 clefts the same interpretation was made on both two-dimensional radiographs and CBCT. In the remaining nine clefts, CBCT added important information to the treatment decision. Conclusions: For the evaluation six months post-operatively of the success of alveolar bone-grafting to clefts, the two-dimensional radiograph should be complemented with CBCT unless the two-dimensional radiograph without doubt reveals open residual cleft and clinical findings indicate graft failure.

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