Nasoalveolar Molding Therapy for the Treatment of Unilateral Cleft Lip and Palate Improves Nasal Symmetry and Maxillary Alveolar Dimensions

Maxillary arch dimensions in bilateral cleft lip and palate in the age 0-5 months

INTRODUCTION

The complete bilateral cleft lip and palate (BCLP) divides the maxillary arch into three segments, separated from each other, resulting in abnormal growth of the alveolar arch. This study evaluated the maxillary arch dimensions in BCLP and compared them with neonates without craniofacial anomalies.

METHODS

This retrospective study was conducted in a tertiary cleft centre. Sixty-six neonates aged 0-5 months were divided into two groups: cleft group-children with BCLP (23 boys and 18 girls) and control group-children without craniofacial deformities (15 boys and 10 girls). The dental models were processed by a 3D scanner. Landmarks were marked to achieve inter-canine distance, inter-tuberosity distance and arch length measurements. t-Tests were used for intergroup comparisons (p < .05).

RESULTS

The maxillary cleft arch was demonstrated to be wider and longer in the posterior region compared to the control group. The inter-canine distance did not present differences between the cleft and controls. The inter-canine distance of the control group was the only measurement influenced by the variable sex.

CONCLUSIONS

The cleft significantly interfered with the arch posterior width and arch sagittal length, making them larger. There was no statistical difference in the measurements between sex in the cleft group.

Factors Influencing Nasoalveolar Molding Treatment Completion and Noncompletion in Infants with Cleft Lip and Palate

OBJECTIVE

Identify sociodemographic factors and comorbidities predictive of nasoalveolar molding (NAM) treatment completion and noncompletion in infants with cleft lip with or without (+/-) cleft palate in a rural-suburban population.

DESIGN

Retrospective cohort study.

SETTING

Tertiary medical center.

PATIENTS, PARTICIPANTS

Infants diagnosed with cleft lip +/- cleft palate who initiated NAM treatment between 2013 and 2023. Forty-seven patients met inclusion criteria.

MAIN OUTCOME MEASURE(S)

Prevalence of NAM treatment completion, defined as continued attendance of NAM appointments until initial lip repair surgery.

RESULTS

NAM treatment noncompletion rate of 23.4%. Noncomplete NAM treatment was associated with greater additional unscheduled NAM visits (P < .001); increased days inpatient after birth (P < .001); NICU admission (P < .001); public insurance (P = .007); preterm birth (P = .008); history of social work visits (P = .024); increased comorbidities (P = .028); non-Caucasian race (P = .034); and presence of siblings (P = .036). Associated comorbidities included use of feeding tube (P < .001); and conditions related with renal (P < .001); cardiac (P = .004); failure to thrive (P = .009); syndromes (P = .009); orthopedic (P = .011); pulmonary (P = .022); and ophthalmologic systems (P = .041).

CONCLUSIONS

Increased overall health complexity, public insurance status, and need for social work support were identified as factors associated with NAM noncompletion. These variables can help identify patients at risk of noncompletion and empower providers to supply individualized support and resources.

Nasal Light Reflex: A Useful Intraoperative Tool in Correction of Cleft Lip Nasal Deformity

Background

The correction of a unilateral cleft lip nasal deformity remains a challenge to cleft surgeons. It is difficult to obtain a routinely predictable outcome. This is in part due to there being no objective intraoperative method to assess the correction.

Methods

We have come up with a simple objective intraoperative method to plan and assess the correction of the nasal deformity. This is done by assessing the nasal light reflex using a mobile phone camera to define the deformity. The points of the desired correction of the lower lateral cartilage are transposed onto the patient. Once the lip and nose repair is completed, another photograph is taken to assess the nasal light reflex and assess the extent of correction. If this is inadequate, further nasal correction is performed. We have used this procedure in 122 cleft lip patients with 93 complete and 29 incomplete.

Results

We have found this to be a useful objective intraoperative method to assist in obtaining improved nasal correction in cleft lip patients. As is well known, relapse of the nose is common in cleft lip repairs, but this method allows one to better gauge the correction at the primary surgery.

Conclusion

Nasal light reflex should be added to the armamentarium of cleft surgeons to assist in superior correction of the nose, which is an item that continues to vex these surgeons.

Nasolabial morphological changes in patients with unilateral cleft lip and palate using a Korat-modified nasoalveolar moulding appliance with primary correction

OBJECTIVE

The objective of this study is to measure the morphological changes of the nose and lip in patients with unilateral cleft lip and palate before and after cheiloplasty with primary rhinoplasty (primary correction) in conjunction with Korat-NAM usage.

DESIGN

Longitudinal cohort study.

SETTING

Cleft Center Maharat Nakhon Ratchasima Hospital, Nakhon Ratchasima, Thailand.

SUBJECTS

Twenty-six patients with unilateral cleft lip and palate.

INTERVENTIONS

Control group: only active obturator before primary correction. Experimental group: an active obturator and Korat-NAM I before primary correction. A customized endotracheal tube was retained in the nostril for 3 weeks before switching to Korat-NAM II for 1 year.

MAIN OUTCOME MEASURES

Six measurements comprising nostril rim length, nostril height, nostril sill width, columella angle, vertical lip height, and horizontal lip length were measured from the patients' photographs. All measurements, except the columella angle, were reported as the cleft side/non-cleft side value ratio. Measurements were taken at the initial appointment, immediately before, 3 weeks after, and 1 year after primary correction.

RESULTS

Nostril rim length ratio, nostril height ratio, nostril sill width ratio, columella angle on the cleft side, and vertical lip height ratio were improved using Korat-NAM before and 3 weeks after primary correction. Nostril rim length and height ratios were significantly better than the control group.

CONCLUSIONS

Korat-NAM improved nose and lip morphology before primary correction. An overcorrection improved the nose and lip morphology on the cleft side. The nostril rim length and vertical lip height on the cleft side also improved with Korat-NAM II 1 year after primary correction.

Systematic Review and Critical Appraisal of the Evidence Base for Nasoalveolar Molding (NAM)

OBJECTIVE

To critically appraise the body of scientific literature supporting the risks and efficacy of nasoalveolar molding (NAM), specifically in contrast to alternative methods of presurgical infant orthopedics (PSIO) or to treatment without PSIO.

MAIN OUTCOME MEASURES

Five outcome domains were considered: nasolabial aesthetics; dentoalveolar relationship; midfacial growth; cost and burden of care; and number of anesthetic events.

DESIGN

MEDLINE, Embase, and Scopus were queried for articles from the first description of the Grayson-Santiago NAM technique (1993) through December 13, 2021. After the application of inclusionary and exclusionary criteria, selected articles were critically appraised using a systematic framework that included risk of bias assessment using the Cochrane RoB 2.0 and ROBINS-I tools.

RESULTS

A total of 88 studies were included. Level-I and -II evidence showed on par or better approximation and alveolar alignment achieved by NAM compared to other PSIO. Level-II and -III evidence showed improved nasolabial aesthetics compared to other PSIOs. Level-II and -III evidence supported no harm to maxillofacial skeletal growth through age 12. Sparse level-III evidence supported a reduced number of labial or nasal revisions following NAM. Level-II and -III evidence showed NAM requiring upfront cost and frequent appointments but reducing caregiver psychosocial burden and reducing long-term costs compared to select alternatives. Many studies carried a high risk of bias.

CONCLUSIONS

Current evidence supports the overall efficacy of NAM regarding short/mid-term outcomes, with a low risk of negative effects on midfacial growth or dental development. The high risk of bias discovered in many papers underscores the need for robust study design in future research.

A Cross-Sectional Study of the Dental Arch Relationship and Palatal Morphology after Cleft Surgery in Italian Children with Unilateral Cleft and Lip Palate

Dental arch relationships (DARs) and palatal morphology (PM) were evaluated in in non-syndromic complete unilateral cleft lip and palate (UCLP) Italian patients after surgery. Pre- and postnatal factors affecting the results were investigated. Sixty-six children with UCLP (40 boys and 26 girls, with a mean age of 10.1 ± 2.9 years), predominantly Caucasian (77%), were consecutively enrolled in this cross-sectional study. Twenty children had received a one-stage protocol consisting of an early periosteal palate surgical repair and lip closure and forty-six were submitted to a staged surgical protocol with delayed palate repair (DPR). A single clinician collected data on their medical history and carried out a dental examination. The DAR and PM were graded on dental casts according to the Eurocran index and dichotomised as favourable and unfavourable based on the treatment outcome. Multiple logistic regression analyses demonstrated that female sex (OR = 6.08, 95% CI: 1.47-25.23, p = 0.013), DPR (OR = 4.77, 95% CI: 1.14-19.93, p = 0.032) and the use of a neonatal plate (OR = 4.68, 95% CI: 1.27-17.16, p = 0.020) increased the odds of having favourable DAR, while only DPR (OR = 9.76, 95% CI: 2.40-39.71, p = 0.001) was significantly associated with a favourable PM. Based on these findings, only DPR had a significantly favourable effect on both DAR and DM in Italian children with complete UCLP.

The Effects of NAM on the Symmetry of the Face and Maxillary Arch in Babies With Unilateral Cleft

The study aimed to evaluate the effect of nasoalveolar molding (NAM) therapy through reverse engineering, or its absence, to obtain symmetry of the face and maxillary arch. Twenty-six babies with unilateral cleft lip and palate received treatment with NAM, and 12 babies with unilateral cleft lip and palate without presurgical orthopedics (control group). Patients were molded and photographed in 2-stages: the first month of life (T1/pre) and after the use of NAM/before the cheiloplasty (T2/post). In the digital models, the analyses performed were arch perimeter, arch length, and labial frenulum angle. The photographs allowed us to analyze nasal width, mouth width, columella angle, and nostril area. The results demonstrated that there was an increase in arch perimeter and arch length in control and NAM groups in the T2 period in comparison to T1. Labial frenulum angle was reduced in the NAM group compared to the NAM-T1 and control-T2 periods. Treatment with NAM yielded a reduction in nasal width in the period of T2 compared with T1. Columella angle was enhanced after NAM use in T2 and, was different from control group. The nostril area was reduced in the NAM group in T2 compared with control group. Nasoalveolar molding therapy reduced the labial frenulum angle, contributing to a reduction in the extension of the cleft. The NAM protocol improved facial symmetry, mainly through nasal effects, whereas the absence of orthopedic therapy yielded a commitment to the face and maxillary arch symmetry.

Current Concepts and Challenges in the Treatment of Cleft Lip and Palate Patients-A Comprehensive Review

Cleft lip and cleft palate has one of the highest incidences in the malformations of the oral cavity, that varies between populations. The background underlying the issue of cleft lip and palate is multifactorial and greatly depends on the genetic factors and environmental factors. The aim of this nonsystematic narrative review is to present the cleft palate and or lip pediatric population as target for interdisciplinary treatment. The purpose of this narrative review is to sum up the modern knowledge on the treatment of patients with clefts, as well as to highlight the importance of the great need for cooperation between different dental specialists along with medical professionals such as oral surgeons, prosthodontists, orthodontists along with medical professions such as pediatricians, speech therapists and phoniatrics, and laryngologist.

Three-dimensional Changes of Maxillary Alveolar Morphology After Using Modified Nasoalveolar Molding in Patients with Complete Unilateral Cleft lip and Palate

OBJECTIVE

This study aimed to evaluate the three-dimensional changes in maxillary alveolar morphology after using modified NAM in patients with complete unilateral cleft lip and palate.

DESIGN

This is a retrospective study.

SETTING

The study was carried out in the dental hospital, Faculty of Dentistry of Naresuan University, Phitsanulok, which serves as a tertiary care center.

PATIENTS

The population sample consisted of 19 patients with nonsyndromic complete unilateral cleft lip and palate.

INTERVENTION

All patients received the modified NAM treatment based on the treatment protocol of the Naresuan University Cleft and Craniofacial Center, Thailand.

MAIN OUTCOME MEASURE

Dental models obtained at pre-treatment (T0) and post-treatment (T1) were scanned to construct the digital models. The maxillary digital models that showed dimensional changes between T0 and T1 were measured using a computer graphic software.

RESULTS

The modified NAM resulted in a significant decrease in the anterior cleft width, posterior cleft width, and anterior arch width. Conversely, it caused a significant increase in the length of the lesser cleft segment and the greater segment rotation. However, the change in the height of both segments and posterior arch width was not found to be significant.

CONCLUSIONS

The modified NAM was an effective device for reducing the alveolar cleft width while improving the alignment of alveolar cleft segments.

A Comparative Assessment of Nasal Appearance following Nasoalveolar Molding and Primary Surgical Repair for Treatment of Unilateral Cleft Lip and Palate

BACKGROUND

Although many cleft teams have adopted nasoalveolar molding to improve nasal form, few comparative studies have assessed the postoperative benefits of this treatment. Given that reported outcomes have been contradictory and that treatment involves considerable burden to families, the purpose of this study was to assess objective and subjective changes from nasoalveolar molding at approximately 5 years of age.

METHODS

All patients with complete unilateral cleft lip and palate who underwent primary cheiloplasty performed by a single surgeon over a 7-year period were reviewed. Patient results were grouped into nasoalveolar molding or no-nasoalveolar molding. Cleft severity and aesthetic outcomes were assessed by panels of raters who independently ranked subject images at presentation, immediately preoperative (after molding), and at 5-year follow-up. Objective symmetry was measured using standard anthropometric analysis on three-dimensional images.

RESULTS

Among 41 patients included, 16 successfully completed nasoalveolar molding. Both groups were similar at presentation; however, the nasoalveolar molding group had improved appearance following molding (p < 0.05). After surgery, at 5 years of age, the nasoalveolar molding group had better rank scores for overall appearance (p < 0.05), cleft nostril height, and cleft medial lip height (p < 0.05). Regression analysis revealed that nasoalveolar molding treatment was the most significant predictor of overall nasal appearance at 5 years, but that treatment team experience and initial severity were also significant predictors (p < 0.05). Qualitative audit following analysis identified favorable and unfavorable features of nasoalveolar molding.

CONCLUSION

In children with complete unilateral cleft lip and palate, nasoalveolar molding was associated with better overall nasal aesthetics and improved cleft nostril height and cleft medial lip height at approximately 5 years of age.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, III.

Evolving Trends in Unilateral Cleft Lip Repair Based on Continuous Certification by the American Board of Plastic Surgery

BACKGROUND

The American Board of Plastic Surgery (ABPS) began collecting data from unilateral cleft lip (UCL) corrections in 2011 as a component of the continuous certification process. We evaluated these data to understand practice patterns in UCL repair, in the United States, and whether these practice patterns had changed over the past 9 years.

METHODS

Tracer data for UCL correction were reviewed from its inception in October 2011 through 2016 and compared to UCL cases between 2017 and March 2020. Trends in practice patterns were evaluated against literature reviews meant to coincide with the ABPS continuous certification data.

RESULTS

A total of 520 cases were included from October 2011 to March 2020. Median age of UCL repair was 4 months and 66% of patients were male. Fifty-one percent of cases presented with a complete cleft lip. There was a decrease in postoperative adverse events when data from 2011 to 2016 was compared to 2017 to 2019 (P = 0.020). Revisions were the most common postoperative adverse event (2%). There was a decrease in nasoalveolar molding from 25% to 12% (P < 0.001) and 56% of total cases underwent a concurrent primary cleft rhinoplasty. The rate of gingivoperiosteoplasty at the time of primary cleft lip repair also fell (9% versus 1%; P < 0.001).

CONCLUSIONS

This article reviews tracer data obtained by the ABPS for UCL repair. The American Board of Plastic Surgery tracer data provides a national, cleft lip-specific database with longer follow-up times than other large databases.

Primary Nasal Correction in Unilateral Cleft Lip: An Ongoing Journey

BACKGROUND

A cleft lip deformity, whether unilateral or bilateral, is usually associated with a deformity of the nose. In present day cleft surgery, it is routine to perform a varying extent of correction of the nasal deformity. There is often relapse and ongoing deformity which warrant further nasal surgery. The authors describe their method of nasal correction which includes using a hypodermic needle to help achieve repositioning and suspension of the nasal cartilages.

MATERIALS AND METHOD

The authors reviewed 100 consecutive cases of unilateral cleft lip who had nasal correction since June 2018. There were 59 males and 41 females with a mean age of 5.5 months. There were 72 complete and 28 incomplete cleft lips. The steps in nasal correction include septal repositioning, sutures to approximate the ala domes, and upper medial crura, suspension of the lower lateral cartilage to the upper lateral cartilage and sutures to approximate the skin, lower lateral cartilage, and mucosa in a sandwich fashion.

RESULTS

The patients were followed up for a range of 9 to 21 months with a mean of 18 months. The correction immediately postop and at 2 weeks follow up was good. However, at 1 year follow up there was some evidence of relapse. The correction achieved was, however, superior to that achieved before this method. None of the relapses were deemed severe enough to warrant further surgery at this stage.

CONCLUSIONS

This method of nasal correction is recommended to achieve superior outcomes in the surgical treatment of unilateral cleft lips.

Short-Term Efficacy of Presurgical Vacuum Formed Nasoalveolar Molding Aligners on Nose, Lip, and Maxillary Arch Morphology in Infants With Unilateral Cleft Lip and Palate: A Prospective Clinical Trial

OBJECTIVES

The purpose of this study was to evaluate the short-term effect of series of preadjusted vacuum formed nasoalveolar molding VF NAM aligners on the morphology of nose, lip, and maxillary arch in infants with unilateral cleft lip and palate (UCLP).

DESIGN

Prospective clinical trial.

SETTING

Unilateral cleft lip and palate patients referred to outpatients' clinic.

PATIENTS

Sixteen nonsyndromic infants with UCLP, less than 2 months of age were included from April 2017 to April 2018.

INTERVENTIONS

All infants received VF NAM therapy. Standardized digital frontal and basilar photographs and 3D digital models were taken before initiation of VF NAM therapy (T1) and after completion of VF NAM therapy (T2).

MAIN OUTCOME MEASURE(S)

Changes in morphology of the nose, lip, and maxillary arch.

RESULTS

Statistical analysis comparing T1 and T2 measurements was performed. Frontal and basilar photographic analysis showed a statistically significant reduction of columella displacement, interlabial gap distance, and nostril width at cleft side (CS), while the nasal height, nostril height at CS, nostril width at noncleft side (NCS), columella deviation angle, nasal tip protrusion, and nostril area at both CS and NCS increased significantly with VF NAM therapy. The nasal width, nostril height at NCS showed no significant change after presurgical VF NAM aligners therapy. The analysis of digital models demonstrated a statistically significant reduction of alveolar cleft width, anterior arch width, arch length, midline deviation, and palatal cleft width, while the posterior arch width and arch perimeter increased significantly with VF NAM therapy.

CONCLUSION

Vacuum formed NAM therapy was effective in reducing the nasoalveolar deformities associated with infants with UCLP and improved the alveolar morphology and nasal symmetry.

Nasolabial Morphology Following Nasoalveolar Molding in Infants With Unilateral Cleft Lip and Palate

AIM

The aim of the present study is to evaluate the effects of nasoalveolar molding (NAM) therapy on nasolabial morphology three dimensionally, and compare the nasolabial linear and surface distance measurements in infants with unilateral cleft lip and palate.

METHODS

Facial plaster casts of 42 infants with unilateral cleft lip and palate taken at the onset (pre-NAM) and finishing stage (post-NAM) of NAM were scanned with 3dMDface stereophotogrammetry system (3dMD, Atlanta, GA). Nineteen nasolabial linear and surface distance measurements were performed on three-dimensional images. In addition to standard descriptive statistical calculations (means and SDs), pre- and post-NAM measurements were evaluated by paired t test.

RESULTS

All measurements except lip gap, nostril floor width, and nostril diameter increased between pre-NAM and post-NAM. Nostril and lip height increased significantly on the cleft side (P < 0.05). No differences were present between linear and surface distance measurements except for nasal width measurement.

CONCLUSIONS

Nasal and lip symmetry improved with NAM. The use of surface distance measurements may be advised particularly for continuous and curved anatomic structures in which circumference differences are expected.

Facilitating CAD/CAM nasoalveolar molding therapy with a novel click-in system for nasal stents ensuring a quick and user-friendly chairside nasal stent exchange

Nasoalveolar molding (NAM) aims to improve nasal symmetry with a nasal stent in cleft lip and palate (CLP) patients. When plates have to be exchanged because of dentoalveolar growth or cleft reduction, the nasal stent has to be mounted onto a new plate. This procedure elongates visiting hours for patients and parents or requires second treatment sessions. This study introduces a quick-lock additive manufacturing solution for chairside nasal stent exchange called RapidNAM. A novel taping retention pin has been designed that enables nasal stent insertion. Patients with unilateral CLP were included in this study. Plaster models were digitalized and measured by two independent observers. Two methods of CAD/CAM-molding therapies were compared: (i) conventional adhesion of a nasal stent (CAD/CAM NAM); (ii) quick-lock system in which the nasal stent was transferred to another plate (RapidNAM). CAD/CAM NAM and its refinement RapidNAM significantly increased the cleft-side nasal height and tilted the nose towards symmetry. The quick-lock system minimizes wire adaptations, since the pre-existing stent can be reused. The new nasal stent development seems a feasible solution to minimize visiting hours but with clinically satisfactory results. This new nasal stent system combines traditional elements of NAM with CAD/CAM-technology.

Establishment of a finite element model of a neonate's skull to evaluate the stress pattern distribution resulting during nasoalveolar molding therapy of cleft lip and palate patients

Nasoalveolar Molding (NAM) is associated with ambivalent acceptance regarding effectiveness and unknown long-term results. Our purpose was to analyze the stress distribution patterns within the viscero- and neurocranium of neonates during the first phase of NAM therapy. A finite element (FE) model of a healthy four-week-old neonate was generated, derived from a computed tomography scan allowing the implementation of a bone-density-dependent material model. The influence of dental germs with variable material properties, the cleft width and area of expected force application were analyzed in a worst-case scenario. The resulting stress distribution patterns for each situation were analyzed using the software Ansys APDL. The established FE model was verified with a convergence analysis. Overall, stress patterns at the age of four weeks showed von Mises stress values below 60.000 Pa in the viscero- and neurocranium. The influences of the allocation of material properties for the dental germs, the area of force application, and the cleft width were negligible. A workflow to simulate the stress distribution and deformation in neonates attributable to various areas of force application has been established. Further analyses of the skulls of younger and older neonates are needed to describe the stress distribution patterns during NAM therapy.

The Effect of Nasoalveolar Molding on Nasal Airway Anatomy: A 9-Year Follow-up of Patients With Unilateral Cleft Lip and Palate

OBJECTIVE

To determine the effects of nasoalveolar molding (NAM) on nasal airway architecture.

DESIGN

Retrospective case-control study of patients with unilateral cleft lip treated with NAM vs without NAM.

SETTING

Tertiary referral center specializing in cleft and craniofacial care. Patients, Participants, and Interventions: Thirty-six patients with complete unilateral cleft lip and alveolus: 19 with NAM therapy and 17 without NAM therapy.

MAIN OUTCOME MEASURES

Cone beam computed tomography (CBCT) scans were compared in multiple coronal sections and were evaluated for linear and angular septal deviation, inferior turbinate hypertrophy, and linear and 2-dimensional airway area.

RESULTS

There were no significant differences in linear or angular septal deviation, inferior turbinate area, linear stenosis, or airway area between NAM- and non-NAM-treated patients.

CONCLUSIONS

NAM effectively molds the external nasal cartilage and structures but may have limited effects on internal nasal structures.