Nasal asymmetry in unilateral cleft lip and palate

Reliability of the novel cleft lip and palate smile esthetic index (CLP-SEI)

BACKGROUND/OBJECTIVES

The aim of this research was to determine the reliability of a novel index for the assessment of smile esthetics in patients with cleft lip and/or palate (CL ± P) at the end of their multidisciplinary treatment, for use in clinical and academic settings.

MATERIALS AND METHODS

Five orthodontists, five periodontologists, five general practitioners, five dental students, and five laypeople rated the smiles of 10 patients with CL ± P twice at a 2 weeks interval. The rating scale consisted of four main categories: 1. nasolabial esthetics, 2. gingival esthetics, 3. dental esthetics, and 4. overall esthetics. A total of 15 parameters were rated. Intra- and inter-rater agreements were calculated using SPSS.

RESULTS

The inter-rater agreement varied between good and excellent whereby the orthodontists, periodontists, general practitioners, dental students, and laypeople obtained agreement scores of 0.86, 0.92, 0.84, 0.90, and 0.89, respectively. The intra-rater agreement was good with agreement scores of 0.78, 0.84, 0.84, 0.80, and 0.79, respectively.

LIMITATIONS

Smile esthetics were rated on static pictures, not in real life or by video recordings in a young adult population.

CONCLUSIONS/IMPLICATIONS

The cleft lip and palate smile esthetic index is a reliable tool for the assessment of smile esthetics in patients with CL ± P.

Nasal symmetry after different techniques of primary lip repair for unilateral complete cleft lip with or without cleft of the alveolus and palate: A systematic review

The aim of this systematic review was to establish the effect of different surgical repairs for the lip on nasal symmetry. PubMed, Scopus, Embase, Cochrane CENTRAL, and Ovid databases search was performed initially for only English-language articles, in patients with unilateral complete cleft lip with or without cleft alveolus and palate (UCCLAP) who were younger than 1 year of age and undergoing cleft lip repair, and are published from the earliest data available up to December 31, 2020. The primary outcome variable was nasal symmetry, with reported complications being secondary variables. A qualitative synthesis was provided. A total of 19,828 records were obtained, and 17 articles were selected for final review. Assessment of the risk of bias of the included randomized controlled trials (RCTs) (N-1) was done with the Cochrane Risk of Bias 2 (RoB-2) tool, and the ROBINS-I tool was used for non-randomized studies (n = 14). Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) was applied to evaluate the quality of the body of evidence. The majority of the included studies compared the triangular repair with the rotation advancement (RA) techniques, and preferred RA or its modifications. In terms of the nasal symmetry, the Fisher repair proved to be superior to the RA technique. Neither RA nor straight line repair was superior to one another. The Delaire technique may be preferred over the modified RA. Also, satisfactory outcomes were observed with simultaneous lip-nose repair. This systematic review examined a plethora of techniques, and the heterogeneity between studies was very high regarding type of surgery, method of nasal symmetry assessment, and length of follow-up, thus producing low-quality evidence; therefore, results should be interpreted with caution. Future research requires RCTs with larger sample sizes and appropriate length of follow-up, and surgeries preferably performed by a single experienced surgeon.

Lessons from behavioral lateralization in olfaction

Sensory information, sampled by sensory organs positioned on each side of the body may play a crucial role in organizing brain lateralization. This question is of particular interest with regard to the growing evidence of alteration in lateralization in several psychiatric conditions. In this context, the olfactory system, an ancient, mostly ipsilateral and well-conserved system across phylogeny may prove an interesting model system to understand the behavioral significance of brain lateralization. Here, we focused on behavioral data in vertebrates and non-vertebrates, suggesting that the two hemispheres of the brain differentially processed olfactory cues to achieve diverse sensory operations, such as detection, discrimination, identification of behavioral valuable cues or learning. These include reports across different species on best performances with one nostril or the other or odorant active sampling by one nostril or the other, depending on odorants or contexts. In some species, hints from peripheral anatomical or functional asymmetry were proposed to explain these asymmetries in behavior. Instigations of brain activation or more rarely of brain connectivity evoked by odorants revealed a complex picture with regards to asymmetric patterns which is discussed with respect to behavioral data. Along the steps of the discussed literature, we propose avenues for future research.

Facial and midfacial symmetry in cleft patients: Comparison to non-cleft children and influence of the primary treatment concept

PURPOSE

Patients with cleft lip, alveolus and palate (CLAP) may suffer from marked asymmetry with an impact on attractiveness and psychosocial aspects. The aim of this study was to assess symmetry in CLAP patients compared to non-cleft controls of similar age with regard to cleft type and treatment concept.

MATERIALS AND METHODS

In CLAP patients with different cleft forms and in healthy non-cleft subjects (control group) a three-dimensional stereophotogrammetric face scan was performed and an objective 3D asymmetry index (AI) was calculated for the whole face, the midface, the upper lip and the nose.

RESULTS

In total, 305 patients were included: 140 CLAP patients (90 male, 50 female, mean age 9.9 ± 3.6 years) and 165 controls (87 male, 78 female, mean age 8.7 ± 2.1 years). In general, CLAP patients showed significantly higher asymmetry than controls, with the most severe asymmetry found in unilateral complete CLAP. Patients treated according to an actual concept considering reconstruction of all affected muscular systems had a significant lower and more favourable AI than patients not treated according to this concept (p < 0.05).

CONCLUSION

An adequate treatment concept is essential to achieve better results concerning symmetry in CLAP, but symmetry values of healthy non-cleft controls are not reached.

Defining the Aesthetic Range of Normal Symmetry for Lip and Nose Features in 5-Year-Old Children Using the Computer-Based Program SymNose

Objective:

To provide a normal comparison group against which to judge symmetry results after cleft surgery and to introduce the thin lip correction (TLC) feature in SymNose. A lip–aspect ratio algorithm has been added to the latest version of SymNose to compensate for the higher degree of overlap in thicker lips when compared to thin lips.

Design:

Retrospective analysis of symmetry in healthy participants, using the computer-based program SymNose on both anteroposterior (AP) and base view images. Photographs of 91 noncleft children were traced twice by 3 independent investigators experienced with SymNose.

Participants:

Five-year-old healthy participants from a local state school in Tavistock (West Devon, United Kingdom).

Main Outcome Measure:

Asymmetry expressed as the perimeter mismatch percentage for nose and lip features on AP view images and for nose features on base view images.

Results:

The perimeter mismatch reference range for the nose (AP view) was 2.65% to 30.91%, for the lip 2.13% to 15.44%, for the nose (base view) 1.69% to 14.84%, for the nostrils 4.68% to 26.6%, and for the width–height ratio 1.15% to 1.80%. The perimeter mismatch percentage for the lip without TLC was significantly higher compared to the perimeter mismatch percentage with TLC (P < .001).

Conclusion:

This article provides a noncleft reference range for all perimeters drawn from SymNose against which to compare results after cleft surgery at 5 years of age. Furthermore, it shows the importance of correcting for variance in lip volume per child.

The possibilities of a portable low-budget three-dimensional stereophotogrammetry system in neonates: a prospective growth analysis and analysis of accuracy

Background

With the technical development, portable three-dimensional (3D) photogrammetry systems are becoming more en vogue because of cost-effectiveness and comparable accuracy to common stationary 3D systems. The purpose of the study was to evaluate the feasibility and accuracy of a low-budget portable system for 3D image acquisition with special regard to the gracile nasal region in neonates. Furthermore, the study aimed to establish a 3D data set of the first 180 days post partum.

Methods

Thirty-three healthy, full-term newborn were enrolled and 3D photographs were prospectively taken monthly with a portable low-budget 3D stereophotogrammetry system (FUEL3D® SCANIFY®) for six months. In the third month, age-matched and corresponding 3D models were acquired by taking an impression of the perinasal area. The resulting plaster models were scanned (3Shape D700, 3Shape® A/S, Denmark). Three examiners analyzed independently 21 defined landmarks of the generated Standard Tessellation Language files with regard to accuracy by using 3dMDvultus™ software. A semi-automatic 3D best-fit analysis of 3D photo and plaster models were performed by using Geomagic® and the Root Mean Squared (RMS) errors were calculated.

Results

Statistically significant changes of midfacial distances and angles with a focus on nasal growth during the first 180 days postpartum could be specified in absolute and relative dimensions. Best-fit analysis in the third month revealed a RMS error of 0.72 ± 0.22 mm with a mean standard deviation of 0.71 ± 0.21 mm.

Conclusions

The analyzed portable 3D stereophotogrammetry system is a feasible methodology with good accuracy, even in newborn. A description of the growth as well as the establishment of a 3D data set was performed. Its implementation for basic documentation for example in cleft patients is possible and might reduce the need for impressions and facilitate the communications with parents and the interdisciplinary team.

Evaluation of a portable low-budget three-dimensional stereophotogrammetry system for nasal analysis

BACKGROUND

Three-dimensional (3D) photogrammetry has reached high standards and accuracy but is mainly conducted with stationary and expensive systems. The purpose of this study was to evaluate the accuracy of a low-budget portable system with special regard to the gracile and challenging nasal region.

MATERIAL AND METHODS

3D models of the perinasal area were acquired by impression-taking and the scanning of the generated plaster models (3Shape D500) or with a portable low-budget 3D stereophotogrammetry (FUEL3D^® SCANIFY^®) system. Four examiners analysed defined landmarks of the generated Standard Tessellation Language files with regard to accuracy and interobserver reliability by using 3dMDvultus™ software. A semi-automatic 3D best-fit analysis of both models was performed by using Geomagic^® and the Root Mean Squared (RMS) errors were calculated.

RESULTS

41 volunteers were included, with 22 perinasal and perioral landmarks, 15 3D distances and eight 3D angles being analysed per data set. In a point-based analysis the mean spreads were partially smaller in the plaster model scans. Most measurements showed very high (>0.8) to excellent (>0.9) intraclass correlation coefficients, the lowest being found for columella length (0.686) and left nostril width (0.636). Overall, the mean RMS error between the superimposed surfaces was 0.89 ± 0.22 mm in the best-fit analysis.

CONCLUSIONS

The corresponding software program was operator-friendly. The findings indicate that the analysed, affordable and portable system is a feasible solution for 3D image acquisition with comparable accuracy reported in the literature. Further studies will analyse the feasibility in neonates.

Comparative Analysis of Three-Dimensional Nasal Shape of Casts from Patients With Unilateral Cleft Lip and Palate Treated at Two Institutions Following Rotation Advancement Only (Iowa) or Nasoalveolar Molding and Rotation Advancement in Conjunction With Primary Rhinoplasty (New York)

OBJECTIVES

To compare 3-dimensional nasal symmetry in patients with UCLP who had either rotation advancement alone or nasoalveolar molding (NAM) followed by rotation advancement in conjunction with primary nasal repair.

DESIGN

Pilot retrospective cohort study.

MATERIALS AND METHODS

Nasal casts of 23 patients with UCLP from 2 institutions were analyzed; 12 in the rotation advancement only group (Iowa) and 11 in the NAM, rotation advancement with primary nasal repair group (New York). Casts from patients aged 6 to 18 years were scanned using the 3Shape scanner and 3-dimensional analysis of nasal symmetry performed using 3dMD Vultus software, Version 2507, 3dMD, Atlanta, GA. Cleft and noncleft side columellar height, nasal dome height, alar base width, and nasal projection were linearly measured. Inter- and intragroup analyses were performed using t tests and paired t tests as appropriate.

RESULTS

A statistically significant difference in mean-scaled 3-dimensional asymmetry index was found between groups with group 1 having a larger measure of asymmetry (4.69 cm³) than group 2 (2.56 cm³; P = .02). Intergroup analysis performed on the most sensitive linear measure, alar base width, revealed significantly less asymmetry on average in group 2 than in group 1 ( P = .013).

CONCLUSION

This study suggests the NAM followed by rotation advancement in conjunction with primary nasal repair approach may result in less nasal asymmetry compared to rotation advancement alone.

The Changing Nasolabial Dimensions following Repair of Unilateral Cleft Lip: An Anthropometric Study in Late Childhood

BACKGROUND

Repair of unilateral cleft lip and nasal deformity in three dimensions requires anticipation of changes in the fourth dimension that can be determined by periodic and objective assessment.

METHODS

Fifty patients with unilateral cleft lip with or without cleft palate underwent primary repair from 1999 to 2004 and were followed through 2014. Anthropometry was performed immediately postoperatively and at a first and second follow-up interval, occurring at an average age of 6.6 and 11.5 years, respectively. Measured differences between cleft and noncleft sides included heminasal width (subnasale-alare), cutaneous labial height (subnasale-crista philtri inferior, subalare-crista philtri inferior), and transverse labial width at the cutaneous-vermilion border (crista philtri inferior-chelion). Contrasts for the rates of growth were assessed with t tests for correlated measures. Using the same method, the difference between growth on cleft and noncleft sides in the second period was compared to that in the first period.

RESULTS

Heminasal width remained narrower on the cleft side, but this difference decreased over time. Subnasale-crista philtri inferior remained longer on the cleft side; there was no difference between the rate of growth on the cleft and noncleft sides in the second period. Subalare-crista philtri inferior remained shorter on the cleft side by a consistent difference at both times of follow-up measurements. Transverse labial width at the cutaneous-vermilion border remained shorter on the cleft side, but this difference decreased in the second period.

CONCLUSION

Understanding how nasolabial features change with growth is critical to crafting the initial repair of unilateral cleft lip and nasal deformity.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, IV.

Facial Aesthetic Outcomes of Cleft Surgery: Assessment of Discrete Lip and Nose Images Compared with Digital Symmetry Analysis

BACKGROUND

High-quality aesthetic outcomes are of paramount importance to children growing up after cleft lip and palate surgery. Establishing a validated and reliable assessment tool for cleft professionals and families will facilitate cleft units, surgeons, techniques, and protocols to be audited and compared with greater confidence. This study used exemplar images across a five-point aesthetic scale, identified in a pilot project, to score lips and noses as separate units and compared these human scores with computer-based SymNose symmetry scores.

METHODS

Forty-five assessors (17 cleft surgeons nationally and 28 other cleft professionals from the UK South West Tri-centre units), scored 25 standardized photographs, uploaded randomly onto a Web-based platform, twice. Each photograph was shown in three forms: lip and nose together, and separately cropped images of nose only and lip only. The same images were analyzed using the SymNose software program.

RESULTS

Scoring lips gave the best intrarater and interrater reliabilities. Nose scores were more variable. Lip scoring associated most closely with the whole-image score. SymNose ranking of the lip images related highly to the same ranking by humans (p = 0.001). The exemplar images maintained their established previous ranking.

CONCLUSIONS

Images illustrating the aesthetic outcome grades are confirmed. The lip score is reliable and seems to dominate in the whole-image score. Noses are much harder to score reliably. It appears that SymNose can score lip images very effectively by symmetry. Further use of SymNose will be investigated, and families of children with cleft will trial the scoring system.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, III.

A novel computer system for the evaluation of nasolabial morphology, symmetry and aesthetics after cleft lip and palate treatment. Part 1: General concept and validation

PURPOSE

The need for a widely accepted method suitable for a multicentre quantitative evaluation of facial aesthetics after surgical treatment of cleft lip and palate (CLP) has been emphasized for years. The aim of this study was to validate a novel computer system 'Analyse It Doc' (A.I.D.) as a tool for objective anthropometric analysis of the nasolabial region.

MATERIALS AND METHODS

An indirect anthropometric analysis of facial photographs was conducted with the A.I.D. system and Adobe Photoshop/ImageJ software. Intra-rater and inter-rater reliability and the time required for the analysis were estimated separately for each method and compared.

RESULTS

Analysis with A.I.D. system was nearly 10-fold faster than that with the reference evaluation method. The A.I.D. system provided strong inter-rater and intra-rater correlations for linear, angular and area measurements of the nasolabial region, as well as a significantly higher accuracy and reproducibility of angular measurements in submental view. No statistically significant inter-method differences were found for other measurements.

CONCLUSIONS

The hereby presented novel computer system is suitable for simple, time-efficient and reliable multicenter photogrammetric analyses of the nasolabial region in CLP patients and healthy subjects.

A novel computer system for the evaluation of nasolabial morphology, symmetry and aesthetics after cleft lip and palate treatment. Part 2: Comparative anthropometric analysis of patients with repaired unilateral complete cleft lip and palate and healthy individuals

PURPOSE

The aim of this study was to use a novel system, 'Analyse It Doc' (A.I.D.) for a complex anthropometric analysis of the nasolabial region in patients with repaired unilateral complete cleft lip and palate and in healthy individuals.

MATERIALS AND METHODS

A set of standardized facial photographs in frontal, lateral and submental view have been taken in 50 non-cleft controls (mean age 20.6 years) and 42 patients with repaired unilateral complete cleft and palate (mean age 19.57 years). Then, based on linear, angular and area measurements taken from the digital photographs with the aid of the A.I.D. system, a photogrammetric analysis of intergroup differences in nasolabial morphology and symmetry was conducted.

RESULTS

Patients with cleft lip and palate differed from the controls in terms of more than half of analysed angular measurements and proportion indices derived from linear and area measurements of the nasolabial region.

CONCLUSIONS

The findings presented herein imply that despite primary surgical repair, patients with unilateral complete cleft lip and palate still show some degree of nasolabial dysmorphology. Furthermore, the study demonstrated that the novel computer system is suitable for a reliable, simple and time-efficient anthropometric analysis in a clinical setting.

The use and reliability of SymNose for quantitative measurement of the nose and lip in unilateral cleft lip and palate patients

INTRODUCTION

It is essential to have a reliable assessment method in order to compare the results of cleft lip and palate surgery. In this study the computer-based program SymNose, a method for quantitative assessment of the nose and lip, will be assessed on usability and reliability.

METHODS

The symmetry of the nose and lip was measured twice in 50 six-year-old complete and incomplete unilateral cleft lip and palate patients by four observers. For the frontal view the asymmetry level of the nose and upper lip were evaluated and for the basal view the asymmetry level of the nose and nostrils were evaluated.

RESULTS

A mean inter-observer reliability when tracing each image once or twice was 0.70 and 0.75, respectively. Tracing the photographs with 2 observers and 4 observers gave a mean inter-observer score of 0.86 and 0.92, respectively. The mean intra-observer reliability varied between 0.80 and 0.84.

CONCLUSIONS

SymNose is a practical and reliable tool for the retrospective assessment of large caseloads of 2D photographs of cleft patients for research purposes. Moderate to high single inter-observer reliability was found. For future research with SymNose reliable outcomes can be achieved by using the average outcomes of single tracings of two observers.

Correction of nasal deformity in infants with unilateral cleft lip and palate using multiple digital techniques

Presurgical correction of severe nasal deformities before cheiloplasty is often recommended for infants with cleft lip and palate. This article describes an approach for the computer-aided design and fabrication of a nasal molding stent. A 3-dimensional photogrammetric system was used to obtain the shape information of the nosewing that was then built as the nostril support for the nasal molding stent. The stent was fabricated automatically with a rapid prototyping machine. This technique may be an alternative approach to presurgical nasal molding in the clinic. Moreover, the patient's nasal morphology can be saved as clinical data for future study.

Cross-specialty developments: a summary of the mutually relevant recent literature from the journal of plastic, reconstructive and aesthetic surgery

Keeping abreast of current developments is increasingly challenging when the volume of specialty articles being published is rising exponentially, and it is most acute when surgical specialties overlap, as in the case of head, neck, and facial reconstructive surgery. Here, the potential for missing key developments presents a compelling case for a summary article that highlights articles likely to be of mutual relevance. We evaluated 129 original studies and 6 reviews published in the Journal of Plastic, Reconstructive, and Aesthetic Surgery between September 2012 and August 2014, and summarised the main papers of interest and merit under the subheadings of head and neck reconstruction, cleft lip and palate, craniomaxillofacial surgery, facial palsy, facial trauma, and aesthetic surgery. Most of the evidence presented (86%) is level 4.

Facial soft-tissue asymmetry in three-dimensional cone-beam computed tomography images of children with surgically corrected unilateral clefts

Cleft lip with or without cleft palate (CL/P) is a relatively common craniofacial malformation involving bony and soft-tissue disruptions of the nasolabial and dentoalveolar regions. The combination of CL/P and subsequent craniofacial surgeries to close the cleft and improve appearance of the cutaneous upper lip and nose can cause scarring and muscle pull, possibly resulting in soft-tissue depth asymmetries across the face. We tested the hypothesis that tissue depths in children with unilateral CL/P exhibit differences in symmetry across the sides of the face. Twenty-eight tissue depths were measured on cone-beam computed tomography images of children with unilateral CL/P (n = 55), aged 7 to 17 years, using Dolphin software (version 11.5). Significant differences in tissue depth symmetry were found around the cutaneous upper lip and nose in patients with unilateral CL/P.

Quantifying Asymmetry and Scar Quality of Children With Repaired Cleft Lip and Palate Using Symnose 2

The Symnose semiautomated assessment of outcome of the appearance of the repaired cleft lip and nose was developed to measure asymmetry. Symnose 2 has been further developed to include quantification of the extent of scar color, intensity, and contour and midline dehiscence, underexpressed in the measurement of asymmetry.

Secondary cleft rhinoplasty: impact on self-esteem and quality of life

BACKGROUND

Rhinoplasty is one of the most challenging facial plastic procedures. Although patient satisfaction is the real outcome parameter in rhinoplasty, most authors have studied objective outcomes evaluated by professionals. The purpose of this study was to determine patient satisfaction after rhinoplasty in patients born with a cleft lip compared with outcome assessment by professionals, and to assess the impact of the procedure on appearance-related distress and generic quality of life.

METHODS

Patient evaluation of the nose was performed before and 1 year after secondary cleft rhinoplasty (n = 33) using a visual analogue scale for nasal function and shape, and the Rhinoplasty Outcome Evaluation. General sinonasal complaints were evaluated using the Sino-Nasal Outcome Test. Appearance-related psychological distress was measured using the Derriford Appearance Scale. The Sheehan Disability Scale evaluated quality of life. Aesthetic outcome was evaluated by scoring of preoperative and postoperative photographs by two independent surgeons.

RESULTS

One year postoperatively, patients showed significantly higher visual analogue scale scores for nasal shape (p < 0.0001) and function (p = 0.005) and higher Rhinoplasty Outcome Evaluation (p < 0.0001) scores. Correspondingly, Sino-Nasal Outcome Test scores were lower (p = 0.006). The appearance-related psychological distress was lower (p < 0.0001), and the generic quality of life was increased after rhinoplasty (p = 0.01). No correlation was found between patient outcome evaluation and surgeons' scores.

CONCLUSION

There is high patient satisfaction at 12 months after secondary cleft rhinoplasty, resulting in a significant improvement of self-esteem and generic quality of life.

Nasal airway and septal variation in unilateral and bilateral cleft lip and palate

Cleft lip and palate (CLP) affects the dentoalveolar and nasolabial facial regions. Internal and external nasal dysmorphology may persist in individuals born with CLP despite surgical interventions. 7-18 year old individuals born with unilateral and bilateral CLP (n = 50) were retrospectively assessed using cone beam computed tomography. Anterior, middle, and posterior nasal airway volumes were measured on each facial side. Septal deviation was measured at the anterior and posterior nasal spine, and the midpoint between these two locations. Data were evaluated using principal components analysis (PCA), multivariate analysis of variance (MANOVA), and post-hoc ANOVA tests. PCA results show partial separation in high dimensional space along PC1 (48.5% variance) based on age groups and partial separation along PC2 (29.8% variance) based on CLP type and septal deviation patterns. MANOVA results indicate that age (P = 0.007) and CLP type (P ≤ 0.001) significantly affect nasal airway volume and septal deviation. ANOVA results indicate that anterior nasal volume is significantly affected by age (P ≤ 0.001), whereas septal deviation patterns are significantly affected by CLP type (P ≤ 0.001). Age and CLP type affect nasal airway volume and septal deviation patterns. Nasal airway volumes tend to be reduced on the clefted sides of the face relative to non-clefted sides of the face. Nasal airway volumes tend to strongly increase with age, whereas septal deviation values tend to increase only slightly with age. These results suggest that functional nasal breathing may be impaired in individuals born with the unilateral and bilateral CLP deformity.

Effect of maxillary alveolar reconstruction on nasal symmetry of cleft lip and palate patients: a study comparing iliac crest bone graft and recombinant human bone morphogenetic protein-2

BACKGROUND

Recombinant human bone morphogenetic protein (rhBMP)-2 has been used in some craniofacial centers worldwide. However, its influence on nasal morphology is unknown. Thus, the objective of this investigation was to assess the effect of maxillary alveolar reconstruction on nasal position and symmetry in unilateral complete cleft lip patients who underwent traditional iliac crest bone grafting transferring versus reconstruction using rhBMP-2.

METHODS

Nineteen unilateral complete cleft lip patients were randomly divided into two groups. In group 1, patients underwent traditional iliac crest bone grafting transferring (n = 11) and in group 2, patients underwent alveolar reconstruction using collagen matrix with lyophilized rhBMP-2 (n = 8). Computerized tomography (CT) imaging was performed preoperatively and at 6 months postoperatively using a previously standardized protocol. Linear distances using anatomic landmarks were performed using tridimensional CT data reformatted by the OsiriX(®) software. Quantitative and qualitative measurements to assess intra- and inter-group nasal position modifications were performed.

RESULTS

Intra-group pre- and postoperative comparisons showed significant differences (p < 0.05) in two linear measurements of group 1, while group 2 did not present a difference (p > 0.05). Group 2 presented significant postoperative enhancement (p < 0.05) in the quantitative nasal symmetry in one measurement. Qualitative analysis showed postoperative nasal symmetry enhancement in 75% of the measurements of group 2 and 36% of group 1. There was no statistically significant difference in the inter-group comparisons.

CONCLUSIONS

Our study demonstrated that both groups showed similar effect on nasal symmetry.