What is cleft?


Cleft, short for cleft lip and palate, is one of the most common birth defects in the world. The name of our organization, “Deutsche Cleft Kinderhilfe”, translates to German Cleft Children’s Aid Society.


How common is cleft?

Children with cleft lip and palate are born on every continent in the world. Worldwide, an average of one case per 500 to 600 births is assumed. Certain regional risk factors favor the development of the malformation. As a result, the numbers are thought to be slightly higher in Asia and slightly lower in Africa. 


What causes cleft lip and palate?

The causes that led to the development of a cleft lip and palate cannot be clearly identified. Rather, a cleft is the result of a combination of factors. This is called a multifactorial origin. We know that a higher risk of the malformation can be inherited from the child’s parents. Therefore intra-family marriages, which are still widespread in many countries, are a major problem.

Other, outside risk factors can further add to the risk before and during pregnancy. These can be for example pollution of the environment and food, unfavorable habits (alcohol, nicotine, drugs), malnutrition and diseases of the mother, lack of oxygen at high altitudes and other effects.

The formation of a cleft is favored by a hereditary disposition.

The baby’s face is formed between the fifth and eleventh week of pregnancy. During this time, the lip is formed, as well as the front section of the jaw and the hard and soft palate. If the process is disturbed by one or more of the risk factors, a cleft can result. 


Can a cleft lip and palate be prevented?

As we have seen, a case of cleft lip and palate does not have one clear cause. Accordingly, there is no definite way to prevent them. The risk of cleft can at best be reduced through measures such as vitamin supplements (for example folate, also known as vitamin B9), and a generally health-conscious lifestyle during pregnancy.

Unlike in the West, where prenatal care and maternity protection are mandated by law, women in our project countries are unable to avoid many of the risk factors during pregnancy. They may not have enough food, or the food they can get may lack important nutrients. The expectant mothers rarely have access to medical care and are often forced to work hard until the birth under conditions that are harmful to health. Accordingly, many children with cleft lip and palate are born in our project countries.


What types of cleft are there?

There are more than 100 different forms of cleft, which in everyday language are all combined under the umbrella term cleft lip and palate. The differences between the types concern the location and the appearance of the cleft.


Cleft locations

Cleft most often occurs in four places. Firstly, cleft lip, cleft lip and upper jaw, or cleft lip and palate usually happen at the end of the second month of pregnancy and affect more boys than girls.

Isolated clefts in the hard and soft palate happen at the beginning of the third month of pregnancy. They are less common and a little more common in girls. The cleft can affect the hard and soft palate or be limited to the soft palate.

Lip (L)
Upper lip including the nostril
Hard palate (H)
Palate roof with nasal floor (bony part of the palate)
Jaw (A)
Tooth-bearing part of the upper jaw (alveolar process)
Soft palate (S)
Soft palate (muscular part of the palate)


There are three levels of severity of a cleft lip and palate:

Partial cleft (microform)
Partial cleft of the muscle and/or the bone with intact skin or mucosa.
Complete cleft, unilateral
Cleft of the muscle and/or bone including the covering skin and mucosa, on one side.
Complete cleft, bilateral
Cleft of the muscle and/or bone including the covering skin and mucosa, on both sides.
All clefts, with the exception of that of the soft palate, can occur on one or both sides. The extent of the cleft is often not directly visible in the partial clefts. Even if the soft palate is closed with mucous membrane, the cleft of the muscles underneath the mucous membrane results in problems speaking and/or a ventilation disorder of the middle ear.
Cleft lip and palate, unilateral
Cleft palate
Complete cleft, unilateral
Complete cleft, bilateral
Partial cleft (microform)

What are the consequences of a cleft lip and palate?

The visible effects of a cleft lip on the appearance should be corrected by early surgery – ideally before the sixth month of life. Further corrections to the lip and nose may be necessary later. Misaligned teeth, especially in the upper jaw, are common and make dental care difficult.

If the hard palate is affected, there is no separation of the mouth and nasal cavity. This interferes with the interplay of the muscles of the lips, tongue and palate, and there is often a change in the position of the tongue. Serious functional problems are the result: swallowing and breathing, early sound formation and facial expressions are affected. That is why the closure of the cleft palate in a second procedure is so important.

Hearing deficits due to disturbed middle ear ventilation are common and can have a further negative impact on speech in addition to that of the disturbed interaction of the muscles. In combination with the formation of scars due to the surgeries, these functional disorders can also lead to impairments in the position of the teeth and the development of the jaw and face as the child grows.

Beyond the physical consequences, the psychological and emotional consequences for children and parents, especially in the first years of life, are considerable. Children who have no access to treatment or who are treated late suffer twice. Due to the obvious defect and possibly additional language difficulties, the children are often teased, marginalized and stigmatized as disabled.


Treatment of cleft lip and palate

Due to the broad spectrum of issues facing the patient, interdisciplinary collaboration in successive therapy steps is essential in order to restore the disturbed functions and thus achieve an optimal outcome for the child. The medical disciplines involved include orthodontics, maxillofacial surgery, pediatrics, ear, nose and throat medicine / pediatric audiology, speech therapy / phoniatrics, psychology, pediatric dentistry and nutrition. Depending on the severity of the cleft, theraopy can stretch into adulthood. For all types of cleft, regular routine check-ups are recommended until development is complete (19 to 21 years).
The operation is the first and central therapeutic measure for a child with cleft lip and palate. The correction of the lip is usually carried out in the first three months of life. A cleft palate is closed between the eighth and eleventh month. Additional surgical interventions are often necessary later.

Thanks to our healthcare systems, the costs for the necessary treatments are covered by the health insurance in developed countries. This however is not the case all over the world. In many countries, parents have to pay for their child’s treatment themselves. But many families cannot raise the money. Without treatment, the children suffer from the mental and physical consequences of the malformation for their entire lives.

Overview of issues and therapies
appearance, facial expressions
lip surgery, NAM therapy (preoperative)
swallowing, breathing
palate surgery
middle ear ventilation / hearing impairment
ENT care, functional speech therapy
speech / phonetics
functional speech therapy, surgical therapies
misalignment of teeth / dental health
dental / orthodontic care
development of the jaw and facial bones
orthodontic / maxillofacial surgery care

NAM therapy

NAM stands for Nasoalvolear Molding. With this non-invasive treatment method, the mouth and nasal cavity are separated in the first few days of life via an individually moulded plastic palate plate. The development of many functions involving the palate is improved by this separation of the functional spaces of the nose and mouth. In addition, the palate plate encourages the correct position of the tongue, reducing the expansion of the cleft and normalizing the tongue function. This supports normal development in the jaw area and makes it easier to learn correct sound formation.
In addition to guiding the growth of the jaw segments, the flattened nostrils of the child are raised during the NAM treatment. This has positive effects on nasal symmetry and overall leads to a better aesthetic outcome. Overall, such early treatments can create better conditions for later surgery. Scarring is reduced, follow-up operations can be avoided. NAM is suitable for all forms of a cleft lip and jaw.

A NAM plate with a nose bridge should not be confused with a simple palate plate (also called “drinking plate”). This is used in the case of a cleft palate to make it easier for the baby to swallow or drink.

NAM plate in use
NAM plate with nose bridge

Support for cleft patients

Support in Germany

Exchange of experiences with other affected families can relieve stress and provide new insights. Suitable contacts can be made via the nationwide self-help association for lip and palate malformations of the Wolfgang Rosenthal Society and the IFUS e.V. society for the aid and support for cleft patients with contact points in Saxony, Saxony-Anhalt and Thuringia.

Caring for a child with cleft lip and palate is particularly demanding in the first few years and can also carry considerable financial burdens. To address this, the federal government has created the so-called “degree of disability” („Grad der Behinderung“, GdB). Depending on the type of cleft, various degrees of disability can be applied for as the basis for financial aid. Depending on the care expenditure, a care allowance can be applied for.

Further information is provided by the German interdisciplinary working group for cleft lip and palate / craniofacial anomalies (AK-LKG).

Support in developing countries

Children in developing countries often have no access to qualified treatment, and their parents receive no support. This is where our aid comes in. Regardless of their origin, cleft children should have the right to medical care – as a prerequisite for a dignified, healthy life.