Effects of Different Timing of Alveolar Bone Graft on Craniofacial Morphology in Unilateral Cleft Lip and Palate

Barriers in Accessing Orthodontic Care for Patients with Orofacial Clefts: Insights from a Florida-Based Survey and National Database Analysis

OBJECTIVE

To assess the barriers to obtaining care for patients with orofacial clefts through a survey of Florida-based orthodontists and families and an analysis of the Pediatric Health Information System (PHIS) database.

DESIGN

A cross-sectional study utilizing multiple-choice questionnaires completed by Florida orthodontists and caregivers of patients who attended a Florida-based cleft and craniofacial clinic. Additionally, data from the PHIS database were analyzed to investigate national factors affecting the age of alveolar bone grafting (ABG).

SETTING

Craniofacial team in Florida.

PATIENTS/PARTICIPANTS

The survey included 39 orthodontists (7.1% response rate) and 48 caregivers (41% response rate) The PHIS study included 1182 patients.

MAIN OUTCOME MEASURES

Barrier to orthodontic care and age of ABG.

RESULTS

Orthodontic Survey: Among the surveyed orthodontists, 71% treated cleft/craniofacial patients, 37% accepted Medicaid, and 55% provided pro-bono care. Poor reimbursement was identified as the most common barrier (58%). Caregiver Survey: Most patients were insured by Medicaid (67%), with 55% incurring out-of-pocket expenses. PHIS Database: The average age of ABG was 10.3 years (SD = 3.2). Government funding was associated with a 6.0-month delay in ABG (p = 0.047) and residing in non-Medicaid expanded states was linked to a 6.0-month delay (p = 0.023). Post-Medicaid expansion status was also associated with a delay (p = 0.004).

CONCLUSIONS

Access to oral care is difficult for patients with OFC. Despite both federal and state mandates, many financial and non-financial barriers still exist in accessing orthodontic care and a majority of patients experience significant out-of-pocket expenses despite statutorily mandated insurance coverage.

Effect of Surgical Timing to Dental Health in Secondary Alveolar Bone Grafting: Three-Dimensional Outcomes

BACKGROUND

There are various opinions on the optimal timing for performing secondary alveolar bone grafting (SABG). This study compared dental health and 3-dimensional outcomes according to the timing of SABG surgery.

PATIENTS AND METHODS

A retrospective chart review was performed in patients who underwent SABG between January 1996 and October 2020. Patients were divided into early SABG (6-8 y old) and traditional SABG (9-13 y old) groups. The final dental survival of the lateral incisor and canine teeth, survival of the bone graft, and maxillary growth were analyzed using plain radiographs and computed tomography with a 3-dimensional volumetric analysis tool.

RESULTS

Thirty-six patients were divided into an early group (15 patients) and a traditional group (21 patients). Five patients had bilateral cleft lip, and 26 patients had unilateral cleft lip and palate; therefore, 36 alveolar clefts were analyzed in this study. Lateral incisor survival was significantly greater in the early group than in the traditional group (60% vs. 23.5%; P<0.05). Compared with that in the traditional group, graft success in the early group was greater (80% vs. 57.1%; P<0.05). Three-dimensional volumetric analysis revealed superior bone graft efficiency in the early group compared with the traditional group (55.2 vs. 38.5%; P<0.05). There was no significant difference in maxillary growth between the 2 groups.

CONCLUSIONS

In our study, superior dental and clinical outcomes were observed in the early SABG group without any long-term complications or maxillary retrusion. Our institution cautiously indicated that SABG could be performed at an age earlier than the existing SABG performed after 9 years old.

Optimal timing for plastic surgical procedures for common congenital anomalies: A review

Apart from listening to the cry of a healthy newborn, it is the declaration by the attending paediatrician in the labour room that the child is normal which brings utmost joy to parents. The global incidence of children born with congenital anomalies has been reported to be 3%-6% with more than 90% of these occurring in low- and middle-income group countries. The exact percentages/total numbers of children requiring surgical treatment cannot be estimated for several reasons. These children are operated under several surgical disciplines, viz, paediatric-, plastic reconstructive, neuro-, cardiothoracic-, orthopaedic surgery etc. These conditions may be life-threatening, e.g., trachea-oesophageal fistula, critical pulmonary stenosis, etc. and require immediate surgical intervention. Some, e.g., hydrocephalus, may need intervention as soon as the patient is fit for surgery. Some, e.g., patent ductus arteriosus need 'wait and watch' policy up to a certain age in the hope of spontaneous recovery. Another extremely important category is that of patients where the operative intervention is done based on their age. Almost all the congenital anomalies coming under care of a plastic surgeon are operated as elective surgery (many as multiple stages of correction) at appropriate ages. There are advantages and disadvantages of intervention at different ages. In this article, we present a review of optimal timings, along with reasoning, for surgery of many of the common congenital anomalies which are treated by plastic surgeons. Obstetricians, paediatricians and general practitioners/family physicians, who most often are the first ones to come across such children, must know to guide the parents appropriately and convincingly impress upon the them as to why their child should not be operated immediately and also the consequences of too soon or too late.

Timing of Alveolar Bone Graft and Barriers to Care

OBJECTIVE

The current standard timing for alveolar bone grafting (ABG) occurs during mixed dentition, typically between the ages of six and twelve. A delay in receiving this operation is associated with an increase in graft loss and an overall thinner maxilla. This study aims to determine whether socioeconomic barriers are associated with a delay in timely ABG.

DESIGN

A retrospective analysis of patients who received ABG at our institution since 2012. Patient demographics, cleft classifications, operative details, and surgical dates were examined. A logistic regression model was created using socioeconomic variables to predict patients receiving delayed ABG. Significant variables were then included in a backwards selection logistic regression, followed by a final analysis of maximum likelihood estimates.

SETTING

Single-institution, primary cleft care center.

PATIENTS

202 patients with cleft palates who underwent ABG.

INTERVENTIONS

ABG.

MAIN OUTCOME MEASURES

Timing in which patients received ABG: standard (6-12 years) and delayed (>12 years).

RESULTS

Female sex was a protective factor in the timing of ABG in our initial univariate analysis (OR = 0.44; p  =  .015). Socioeconomic factors resulting in delayed presentation for ABG include median income (OR = 1.0; p  =  .018) and public insurance status (OR = 3.75; p < .001). Median income, sex, and driving distance to the cleft clinic were not significant following backward elimination, however, private insurance status remained significant (OR = 3.71; p  =  .0001).

CONCLUSION

Patients with public insurance are approximately 3.75 times more likely to receive ABG during permanent dentition. Multidisciplinary teams should work closely with patients on public insurance to ensure timely delivery of ABG.Level of Evidence III, Retrospective.

The Effect of Platelet-Rich Fibrin and Platelet-Rich Plasma in Secondary Alveolar Bone Grafting in Cleft Lip and Palate Patients: A Systematic Review

(1) Background: Cleft lip, alveolus, and palate are the most common congenital abnormalities in the world, occurring in one in seven hundred live births. Secondary alveolar bone grafting (SABG) is usually performed when the permanent canine root shows one-half to two-thirds of root development. To improve the surgical outcome, supplemental grafting materials such as platelet-rich fibrin (PRF) and platelet-rich plasma (PRP) have been used as an adjunct. This review is designed to assess the efficacy of PRF and PRP in improving the outcome of SABG. (2) Methods: A comprehensive literature search was performed until 13 October 2022 on MEDLINE, EMBASE, The Cochrane Library, and Pubmed. The full text of potentially relevant studies was reviewed, and only randomised clinical trials (RCTs) were included based on the inclusion criteria. (3) Results: A total of 656 studies were screened, of which four were included for final review. All of the four included studies that evaluated the quantitative or qualitative surgical outcome in varied ways. (4) Conclusions: Results of this review suggest that both PRF or PRP and control group (without the use of PRF/PRP) achieved similar successful outcomes in bone height, bone density, and bone volume in both qualitative and quantitative assessment.

Alveolar Bone Grafting in Unilateral Cleft Lip and Palate: Impact of Timing on Palatal Shape

Alveolar bone grafting (ABG) is a critical surgical intervention in patients with a cleft of the alveolus, aimed at reconstructing the alveolar ridge to facilitate proper eruption, periodontal support, and alignment of adjacent permanent teeth. The optimal timing for ABG remains debated, with late secondary ABG between the ages of 9 and 11 being widely adopted. This study compared the palatal shapes of 28 children at a mean age of 9.5 years (SD = 0.7) who underwent early secondary ABG at a mean age of 2.1 years (SD = 0.6) or 33 children at a mean age of 10.8 years (SD = 1.5) who underwent late secondary ABG at a mean age of 8.6 years (SD = 1.3) to 60 non-cleft controls at a mean age of 8.6 years (SD = 1.2). The palatal shapes were captured with 239 landmarks digitized on the palate on a digital model. Utilizing geometric morphometric methods, i.e., generalized Procrustes superimpositions, principal component analysis, and permutation tests, we assessed the impact of ABG timing on palatal morphology. The first five principal components (PCs) explained 64.1% of the total shape variability: PC1 = 26.1%; PC2 = 12%; PC3 = 11.9%; PC4 = 7.8%; and PC5 = 6.4%. The Procrustes distance between both cleft groups and the control group was more than twice as large as the Procrustes distance between the early ABG and late ABG groups. Nonetheless, all intergroup differences were statistically significant. Our findings suggest that early ABG has a limited negative effect on palatal shape, providing comparable outcomes to late ABG. The study highlights the potential suitability of early ABG, challenging conventional practices and encouraging further exploration into its long-term effects on maxillary growth.

Racial Disparities in the Timing of Alveolar Bone Grafting

Standard bone grafting between ages 6 and 12 has become the preferred treatment of choice for alveolar clefts. Given the importance of surgical timing in complete cleft palate repairs, it is important to identify any populations at-risk for delayed alveolar bone grafting. The purpose of this study is to identify whether a racial disparity is present nationally in the timing of alveolar bone grafting.

Retrospective analysis Setting: Hospitals participating in the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP).

Inclusion criteria involved patients who underwent alveolar bone grafting identified by current procedure terminology (CPT) code 42210 between years 2012 and 2019. Patients were stratified by age at time of operation based on the following parameters: early bone grafting (before 6 years of age), standard bone grafting (between 6 and 12 years of age), and late bone grafting (after 12 years of age).

Racial and ethnic differences in the age of patients at the time of alveolar bone grafting.

Overall, 20.28% of the cohort received alveolar bone graft after 12 years of age. African American (29.33%) and Hispanic (24.42%) patients received late alveolar bone grafting more frequently than other racial and ethnic groups (P < .001).

Racial and ethnic disparities are present in the frequency at which patients receive late alveolar bone grafting for complete cleft palates. Given the suboptimal surgical results of late compared to standard alveolar bone grafting it is important to further investigate the driving factors of these disparities.

Speech and Burden of Secondary Surgical Interventions Following One-Stage Repair of Unilateral Cleft Lip and Palate and Alveolar Bone Grafting Performed at Different Timings

A comprehensive assessment of the treatment outcome in cleft lip and palate involves evaluating speech and the impact of speech-correcting surgical interventions. This retrospective case-control study compared the speech outcomes of 37 boys and 19 girls with unilateral cleft lip and palate (UCLP) who underwent one-stage cleft repair at an average age of 8.1 months and alveolar bone grafting either before or after 6 years of age, with a non-cleft control group at an average age of 10 years. Two experienced speech and language pathologists conducted perceptual speech assessments using a specialized test of 27 sentences designed for Polish-speaking cleft patients. The results revealed that 5.3% had severe hypernasality, 1.8% had severely impaired speech intelligibility, 10.7% exhibited retracted compensatory articulations, and 7.1% displayed facial grimacing. Mild hyponasality was observed in 12.3% of patients, while 16.1% exhibited voice abnormalities. Additionally, 12.5% of patients required orofacial fistula repairs, 3.6% underwent pharyngoplasties, and 28.6% received ear ventilation tube insertions. The study indicates that speech abnormalities in UCLP patients were relatively infrequent and not highly severe, suggesting that the primary UCLP repair method presented effectively reduced the need for further surgical interventions, leading to positive speech outcomes.

Machine learning in 3D auto-filling alveolar cleft of CT images to assess the influence of alveolar bone grafting on the development of maxilla

BACKGROUND

Machine learning based auto-segmentation of 3D images has been developed rapidly in recent years. However, the application of this new method in the research of patients with unilateral cleft lip and palate (UCLP) is very limited. In this study, a machine learning algorithm utilizing 3D U-net was used to automatically segment the maxilla, fill the cleft and evaluate the alveolar bone graft in UCLP patients. Cleft related factors and the surgery impact on the development of maxilla were analyzed.

METHODS

Preoperative and postoperative computed tomography images of 32 patients (64 images) were obtained. The deep-learning-based protocol was used to segment the maxilla and defect, followed by manual refinement. Paired t-tests and Mann-Whitney tests were performed to reveal the changes of the maxilla after surgery. Two-factor, two-level analysis for repeated measurement was used to examine the different trends of growth on the cleft and non-cleft sides of the maxilla. Pearson and Spearman correlations were used to explore the relationship between the defect and the changes of the maxillary cleft side.

RESULTS

One-year after the alveolar bone grafting surgery, different growth amount was found on the cleft and non-cleft sides of maxilla. The maxillary length (from 34.64 ± 2.48 to 35.67 ± 2.45 mm) and the alveolar length (from 36.58 ± 3.21 to 37.63 ± 2.94 mm) increased significantly only on the cleft side while the maxillary anterior width (from 11.61 ± 1.61 to 12.01 ± 1.41 mm) and posterior width (from 29.63 ± 2.25 to 30.74 ± 2.63 mm) increased significantly only on the non-cleft side after surgery. Morphology of the cleft was found to be related to the pre-surgical maxillary dimension on the cleft side, while its correlation with the change of the maxilla after surgery was low or not statistically significant.

CONCLUSION

The auto-segmentation of the maxilla and the cleft could be performed very efficiently and accurately with the machine learning method. Asymmetric growth was found on the cleft and non-cleft sides of the maxilla after alveolar bone graft in UCLP patients. The morphology of the cleft mainly contributed to the pre-operation variance of the maxilla but had little impact on the maxilla growth after surgery.

Correlation between alveolar cleft morphology and the outcome of secondary alveolar bone grafting for unilateral cleft lip and palate

Background

Secondary alveolar bone grafting (SABG) is an integral part of the treatment for cleft lip and alveolus and cleft lip and palate. However, the outcome of SABG was not satisfactory as expected, factors that affecting the outcome were still controversial. The aims of this study were to summarize a new method for the classification of alveolar cleft morphology in patients with unilateral cleft lip and alveolus or unilateral cleft lip and palate, to evaluate the correlation between the morphology and SABG outcomes, to identify factors that might predict the outcomes.

Methods

The characteristics of the cleft morphologies of 120 patients who underwent SABG were observed using the preoperative Cone-Beam Computed Tomography (CBCT) images. 52 patients who had CBCT scans performed at least 6 months after SABG were included for the evaluation of outcomes. Both categorical and continuous evaluation methods were measured. Correlations between cleft morphology and SABG outcomes were assessed using the Pearson correlation coefficient in SPSS 27.0.0.

Results

A new method for the classification of cleft morphology was summarized:type I, prism type (labial defect size ≥ palatal defect size; nasal defect size ≥ occlusal defect size); type II, prism’ type (labial defect ≥ palatal defect; nasal defect < occlusal defect); type III, inverted prism type (palatal defect ≥ labial defect); type IV, funnel type (presented as a significantly narrow defect area in the middle towards the vertical dimension); and type V, undefinable (extremely irregular morphology can’t be defined as any of the above types). Categorical evaluation showed 8 failure, 11 poor, 12 moderate, and 21 good results, while the average bone filling rate was 59.24 ± 30.68%. There was a significant correlation between the cleft morphology and categorical/continuous evaluation outcome (p < 0.05).

Conclusion

The new method for the classification of alveolar cleft morphology summarized in this study was comprehensive and convenient for clinical application. Both categorical and continuous methods should be used for radiographic assessments in patients undergoing SABG. The chances of a successful procedure might be better when the patient has type I or IV morphology, in which the shape is like a funnel in the relatively palatal or occlusal area towards the vertical dimension. A relatively great amount of bone resorption was observed in most patients.

Trial registration Chinese clinical trial registry; registration number: ChiCTR2100054438.

Early Secondary Alveolar Bone Grafting and Facial Growth of Patients with Complete Unilateral Cleft Lip and Palate

OBJECTIVE

To investigate the craniofacial growth outcomes of early secondary alveolar bone grafting(ABG) around 6 years of age.

DESIGN

Retrospective cohort study.

SETTING

1 North-American and 5 Northern-European cleft centers.

SUBJECTS

33 subjects with CUCLP consecutively treated with secondary ABG around 6 years of age were compared to 105 subjects from 4 centers treated with late secondary ABG and 19 subjects from 1 center with primary ABG.

METHODS

Preorthodontic standardized lateral cephalometric radiographs taken after 12 years of age were traced and analyzed according to the Eurocleft Study protocol. Fourteen angular and two proportional measurements were performed. Measurement means from the Study Center(SC) were compared to 5 Northern-European centers using analysis of variance and Welch's modified t-tests, and P < .05 was considered statistically significant.

RESULTS

For the SC, the mean age ± SD at the time of bone graft was 5.85 ± 0.71 years and the mean age at the time of the lateral cephalogram was 13.4 ± 1.8 years. The sagittal maxillary prominence of the SC was favorably comparable to the 5 Northern-European centers. The mean SNA (78.1 ± 4.3) for the SC was significantly higher compared to 4 of the 5 Northern-European centers(all P < .05), and the mean ANB angle was comparable to 4 of the 5 centers. Similarly, the mean soft tissue ANB angle was not significantly different to the 5 centers. The soft tissue vertical proportions compared favorably to all 5 Northern-European centers(all P < .01).

CONCLUSIONS

Craniofacial growth outcomes of early secondary ABG around 6 years compare favorably to the outcomes of late secondary ABG.

Does Early Secondary Alveolar Bone Grafting Influence Need for Additional Maxillary Advancement Procedures in Cleft Lip and Palate?

OBJECTIVE

To determine if secondary alveolar bone grafting (SABG) timing in patients with cleft lip and palate (CLP) influences the future need for additional maxillary advancement procedures, particularly Le Fort I osteotomy with rigid external distraction (RED).

DESIGN

Retrospective cohort study. Groups were separated by SABG timing: early mixed dentition (ages 68 years) or late mixed dentition (ages 9-11 years). The criterion for RED was negative overjet ≥8 mm, and sufficient dental development for RED.

SETTING

Single tertiary care institution.

PATIENTS

Patients with CLP that underwent SABG from 2010 to 2015. Exclusion criteria included syndromic conditions, SABG surgery at age >12 years, current age <12 years, and <2 years follow-up. 104 patients were included.

MAIN OUTCOME MEASURES

The number of RED candidates and treated patients.

RESULTS

There was no statistical difference in the number of RED candidates (P  =  .0718) nor treated patients (P  =  .2716) based on SABG timing; stratification by laterality was also insignificant. Early SABG is associated with higher odds of being a RED candidate (pooled, unilateral, bilateral) and treated patient (pooled and unilateral); however, there were no statistically significant associations between SABG timing and the number of RED candidates and treated patients as determined by logistic regression models.

CONCLUSION

There is no statistically significant association between SABG timing and the odds of being a RED candidate or treated patient. Future prospective studies are recommended to assess the relationship between SABG timing and maxillary growth in patients with CLP.

Alveolar Volume Following Different Timings of Secondary Bone Grafting in Patients with Unilateral Cleft Lip and Palate. A Pilot Study

This study was intended to evaluate the relationship between secondary alveolar bone grafting (SABG) timing and the alveolar volume in patients with unilateral cleft lip and palate (UCLP). The material consisted of CTs of 35 patients (17 males, 18 females) with UCLP who underwent a one-stage primary cleft repair at a mean age of 8.4 months and SABG at different timings ranges of 1.8–18.8 years. The mean age at CT was 17.2 years. The relative coefficient (Ꞷ) which was independent from factors such as individual maxillary size, gender or age at the CT was introduced in order to compare volumes of the cleft-side in relation to the non-cleft-side alveolus. Pearson correlation coefficient r between Ꞷ coefficient and SABG timing was weak negative (r = −0.34, p = 0.045). The multiple regression analysis implied that the dependent variable-Ꞷ coefficient was associated with independent variables (cleft repair and SABG timings and age at CT) with r² = 0.228. Only patient’s age at SABG explained the dependent variable (p = 0.003). The study cautiously indicates a tendency to larger alveolar volume following earlier timing of SABG. Nevertheless, the further research on a larger group of patients should be performed before formulating any clinical indications.

Regenerative Strategies in Cleft Palate: An Umbrella Review

(1) Background: Alveolar bone defects or decreased alveolar bone height and width may have different causes, such as cleft palate. Regenerative procedures in oro-dental defects are challenging due to anatomical factors and the distinct cell populations involved. The iliac crest bone graft remains the gold-standard for cleft palate closure. However, tissue regeneration approaches have been employed and their outcome reviewed, but no conclusions have been made about which one is the gold-standard. (2) Methods: this umbrella review aims to critically appraise the effectiveness of the current approaches in bone defects regeneration in non-syndromic patients with cleft palate. A search was performed in PubMed, Cochrane Library, Scopus, Web of Science and EMBASE databases. (3) Results: Systematic reviews of randomized and non-randomized controlled trials with or without meta-analysis were included. Nine articles were included in the qualitative analysis and five in the quantitative one. The included studies quality was evaluated with AMSTAR2. (4) Conclusions: The use of new regenerative strategies, such as bone morphogenic protein 2, appears to provide similar results regarding bone volume, filling, and height to the standard technique with the iliac crest bone graft.

Maxillofacial morphology in post-pubertal patients with unilateral cleft lip and palate following early vs. late secondary alveolar bone grafting

The study aimed at comparing maxillofacial morphology and burden of surgical treatment in post-pubertal patients with unilateral cleft lip and palate (UCLP) following early vs. late secondary alveolar bone grafting (SABG). In this retrospective study maxillofacial morphology was assessed on lateral cephalograms of skeletally matured patients with UCLP operated on consecutively in one center by the same method of one-stage primary cleft repair followed by SABG. Cephalometric analysis comprised 8 angular and 7 linear measurements. Maxillary growth restriction was evaluated by measuring SNA angle and Co-A and PNS-A distances. Five linear regression models with SNA, SNB, ANB, Co-A, and MP/SN as dependent variables and age at primary cleft repair, age at SABG, age at taking cephalogram, surgeon, and total number of surgical interventions as independent variables were also created. 135 patients were included in the study - 70 patients (47 males and 23 females) had early SABG (E-SABG group) and 65 patients (40 males and 25 females) had late SABG (L-SABG group). Mean age at bone grafting procedure was 2.7 years (range 1.5-5.9, SD 1.1) and 10.3 years (range 6.1-18.8, SD 3.2) in E-SABG and LSABG group respectively. The variables describing the degree of maxillary growth restriction - SNA, Co-A, and PNS-A - were comparable in both groups (p = 0.707, 0.116, and 0.932, respectively). Regression models demonstrated that independent variables were not associated with the values of SNA angle, SNB angle, ANB angle, MP/SN angle, and Co-A distance (p = 0.761, 0.088, 0.249, 0.380, and 0.363, respectively). The percentages of oronasal fistula repair, VPI repair, repeated SABG, upper lip correction, rhinoplasty, orthognathic surgery were 22.9, 7.1, 15.7, 24.3, 42.9, 2.9 in E-SABG group and 27.7, 7.7, 9.2, 36.9, 47.7, 3.1 in L-SABG group respectively. Mean number of all surgical interventions was 3.2 in E-SABG and 3.4 in L-SABG group, respectively (p = 0.271). Considering the comparable maxillofacial morphology and burden of surgical care in matured patients after early and late SABG, the choice of timing of bone grafting surgery could be left to the discretion of the surgeon.

Skeletal and Dental Habilitation of Residual Alveolar and Maxillary Clefts

ABSTRACT

Management of residual clefts of the alveolus and maxilla requires the coordinated effort of multiple members of the craniofacial team including surgeon, orthodontist, and when teeth are hypoplastic or absent, the prosthodontist to achieve complete habilitation. Such cooperation among specialists begins early in the patient's life and continues through completion of care.Although numerous publications on this topic exist, few present definitive multidisciplinary reconstructive outcomes with longterm results. In this review paper, the authors present our comprehensive, multidisciplinary protocols, experience, and techniques as they have evolved with over 35 years of practice at our Craniofacial Center.Details of our updated protocols for each intervention and procedure, including our current thoughts on appropriate timing, follow up and advantages from the incorporation of current technologies are discussed. Close cooperation among specialists at all stages of care, the use of evolving technology, and adherence to, and modification where indicated, of time honored team protocols enables us to consistently achieve successful functional and esthetic outcomes, while minimizing complications.

Prediction of orthognathic surgery need in children with unilateral cleft lip palate: Dental arch relationships and 5-year-olds' index

OBJECTIVE

To evaluate whether dental arch relationships at 6 years of age can categorize treatment outcome and predict later need for orthognathic surgery in children with unilateral cleft lip and palate (UCLP).

SETTING AND SAMPLE POPULATION

A retrospective longitudinal single-centre study. The study sample comprised 70 consecutive non-syndromic children (47 boys) with complete UCLP operated on by pushback techniques during 1981-1989 and followed until early adulthood in the same cleft centre.

MATERIALS AND METHODS

Dental casts and maxillomandibular relationships were assessed before orthodontic treatment and secondary alveolar bone grafting at mean age 6.1 years (range 5.6-6.8) using the 5-year-olds' index and lateral cephalograms. The need for orthognathic surgery was retrieved from patient files. Student's t test, Pearson's correlation, and Kappa statistics were used in statistical analyses.

RESULTS

Orthognathic surgery frequency was 41% (29/70). Those needing orthognathic surgery comprised all 3 patients with an index score of 5 (very poor), 14 of 17 (82%) scoring 4 (poor), 10 of 26 (38%) scoring 3 (fair), and 2 of 19 (11%) scoring 2 (good). Of the five patients with index score 1 (excellent), none needed osteotomies. The mean index score was 2.9. The score was significantly better in those without orthognathic surgery (2.4 versus 3.6). A significant negative correlation existed between the 5-year-olds' index and cephalometric angles ANB and anb.

CONCLUSION

The use of 5-year-olds' index may help to predict treatment outcome and the clinical need for orthognathic surgery especially in patients with the lowest and highest index scores.

[Presurgical orthopedic treatment of children with unilateral cleft lip and palate with a sequential splints method: indications and long-term results]

OBJECTIVES

To justify the use of the Sequential Splints Method of presurgical orthopedic treatment for children with unilateral cleft lip and palate depending on extent of initial deformation and to estimate long-term results.

MATERIALS AND METHODS

The method was applied in 17 unilateral cleft lip and palate infants who received treatment at the age from 4 days to 3 months. There was a control group of 28 cleft lip and palate patients operated with no early orthodontics. Average age in both groups at the time of research was 3.8±0.9 years. Comparative assessment was conducted before the beginning of the post-operative orthodontic treatment for the following parameters: residual width of the alveolar process cleft, presence of lateral incisor's bud, the extent of the nose deformation on the cleft side.

RESULTS

It was found that residual width of the alveolar process cleft was, on average, 5.95 mm in the main group and 12.6 mm in the control group. The percentage of the lateral incisor adentia was 28% in the main group and 66% in the control group. The mean score of alar nose deformation was 3.9 and 3.1 points, correspondingly.

CONCLUSION

According to obtained results patients who did not receive the presurgical orthopedic treatment were more likely to have residual deformations and larger residual width of the alveolar process cleft. There was higher risk of teeth germs loss in the control group. The Sequential Splints Method of presurgical orthopedic treatment is recommended as a necessary part of the treatment for the unilateral cleft lip and palate.

Ischial tuberosity: new donor site for bone grafts in animal cleft research

In the context of cleft repair in animal research in rat models, different areas can be used for bone grafting. The aim of the present study was to present the tuberosity of the ischium as a new donor site and to evaluate its quality in relation to an artificial alveolar cleft. Four weeks after creating experimental alveolar clefts in seven Wistar rats, the repair was performed in the now twelve-week-old male animals using bone blocks grafted from the ischial tuberosity. Two days before surgery and two as well as twenty-eight days after surgery, microCT scans were performed, and the grafted bone blocks were analyzed regarding height, width, thickness, and volume. Additionally, bone mineral density (BMD) and bone volume fraction (BV/TV) were measured in the repaired cleft. The mean bone volume of the graft was about 19.77 ± 7.77mm³. Immediately after jaw reconstruction the BMD and BV/TV were about 0.54 ± 0.05 g/cm³ and 54.9 ± 5.07% for the transplant and about 1.13 ± 0.08 g/cm³ and 94.5 ± 3.70%, respectively, for the surrounding bone. Four weeks later the BMD and BV/TV were about 0.57 ± 0.13 g/cm³ and 56.60 ± 13.70% for the transplant and about 11.17 ± 0.07 g/cm³ and 97.50 ± 2.15%, respectively, for the surrounding bone. A hip fracture was found in four of the animals after surgery. The ischial tuberosity offers large bone blocks, which are sufficient for cleft repair in the rat model. However, the bone quality regarding BMD and BV/TV is less compared with the surrounding bone of the alveolar cleft, even after a period of 4 weeks, despite recognizable renovation processes.

Three-Dimensional Analysis of the Pharyngeal Airway Volume and Craniofacial Morphology in Patients With Bilateral Cleft Lip and Palate

OBJECTIVE

This study aimed to determine the correlations between the craniofacial morphology and pharyngeal airway volume in patients with complete bilateral cleft lip and palate (BCLP).

DESIGN

Retrospective study.

SETTING

Tertiary hospital.

PARTICIPANTS

Twenty-seven patients with complete BCLP and 27 class I control patients, aged 10 to 14 years.

MAIN OUTCOME MEASURE

The pharyngeal airway volume and craniofacial morphology were evaluated using cone-beam computed tomography. Measurements were compared between groups and any correlations were identified.

RESULTS

A significantly smaller total pharyngeal airway volume (TPV), oropharyngeal airway volume, and upper (UOPV) and lower (LOPV) oropharyngeal airway volume were found in patients with BCLP than in class I control patients, with no difference in the nasopharyngeal volume between groups. Furthermore, the craniofacial morphology measurements of N-Me, S-Go, Or-C, Ptm-C, Me-C, Co-Go, Go-Me, Ptm-Or, N-S-Ar, and Ar-Go-Me significantly differed between the BCLP and control groups (all P < .05). Multiple regression analysis indicated that Ptm-C and Me-C; Ptm-C, Or-C, and Me-C; and Me-C explained 20.3%, 38.9%, and 17.1% of the variations in TPV (P = .025), UOPV (P = .002), and LOPV (P = .018), respectively.

CONCLUSIONS

Total pharyngeal airway volume, TPV, OPV, UOPV, and LOPV were significantly smaller in patients with BCLP than in class I controls. In patients with BCLP, the maxilla showed inhibited sagittal development and a retrograde position; moreover, the pharyngeal airway volume was weakly associated with the position of the maxilla and mandible relative to the coronal plane.