This paper reports the case of a 4-year-old male patient who was brought by parents requesting for replacement of multiple missing anterior teeth. The patient suffered from congenital insensitivity to pain without anhidrosis and presented with full blown sequelae of the condition in the form of oral self-mutilation leading to loss of teeth, tongue tip amputation, finger tips destruction, and lower limb wound infections. Dental and orthopaedic treatment consists of local management of oral wound and prevention from further oral and finger injuries that takes the form of dental splints and finger sleeve splints, constant feet coverage with shoes, and behavioural medical therapy. The age of the patient and parents’ education present challenges in managing this condition to avoid morbidity and premature mortality.
Pain is a common unpleasant experience often caused by intense or damaging stimuli. Acquired insensitivity to pain such as diabetic neuropathy is a common condition. However, congenital insensitivity to pain with or without anhidrosis [
These cases are very often referred to dental clinics for emergency management of acute oral trauma resulting from their neurological condition. This case report describes a case of a four-year-old boy with congenital insensitivity to pain that was brought by his parents seeking dental help for prostheses to replace his self-extracted primary teeth at the University Dental Hospital Sharjah, United Arab Emirates.
A four-year-old Arab-Egyptian boy was brought by parents to pediatric clinic seeking prosthetic replacement of multiple missing teeth. The patient was elder of two siblings from a consanguineous marriage. History revealed the patient was born at full term through normal delivery and both parents and the younger brother were healthy.
Past medical history showed previous hospital admission at the age of two years and ten months for emergency intervention to treat chronic osteomyelitis and periostitis that resulted in swollen right foot above the talus. The condition at that time was diagnosed as septic arthritis and acute osteomyelitis. The condition in the right foot recovered well albeit with some scarring. At age three, patient’s right little toe got hurt while playing for which he obviously never complained, which later got infected leading to necroses and ultimate amputation (Figure
Photograph of the right foot showing necrosed right little toe resulting from severe infection before amputation at age of 2.8 years.
The parents noticed that the patient is suffering from some chewing difficulties due to premature tooth loss but without swallowing difficulty and this was the main reason that had brought them to seek dental treatment. General examination showed a fully alert patient with hyperactive behavior and short attention span. The patient’s height and weight was appropriate for his age with normal gait and posture. There was an extensive damage to index finger of the right hand due to biting and chewing (Figures
(a) Photograph at age two, showing self-inflicted traumatic ulcer due to biting. (b) Photograph at age four, showing self-amputation of the terminal phalanges of the right index finger from dorsal aspect. (c) Photograph at age four, showing self-amputation of the terminal phalanges of the right index finger from ventral aspect.
Clinical oral examination demonstrated scars on tip of the tongue and around vermillion border of the lower lip suggesting self-inflicting injuries probably due to pain insensitivity. The tongue was of normal size and color but bald and depapillated. Intraoral hard-tissue examination demonstrates no carious lesion. There was an open wound in the left mandibular quadrant with exposed alveolar bone due to a very recent self-extraction of two deciduous molar teeth (74, 75), according to the history. Distal to the wound, there was premature exposure of mesiobuccal cusp tips of the left mandibular first permanent molar. In addition, severely resorbed maxillary and mandibular alveolar ridges were evident clinically and radiographically. The orthopantomogram (OPG) examination of the jaw bones showed normal jaw anatomy and bone density (Figure
An orthopantomogram (OPG) taken at age of four, showing the maxilla and mandible with few standing deciduous teeth and maturation stage of permanent maxillary and mandibular teeth.
It was noted that piercing the buccal gingiva with a sharp dental probe during oral examination did not elicit any physical reaction from the child.
Based on the available pediatric, orthopedic, and neurological records, a diagnosis of oral self-mutilation secondary to congenital insensitivity to pain was established.
In this case, a young child who is devoid of normal pain sensation suffers injuries in several parts of the body without showing any disability due to pain. Mardy and his colleagues [
The destructive behaviour of self-tooth extraction and other oral manifestations have been reported by many centers managing these special children [
The poorly healed lower left second deciduous molar extraction socket with exposed alveolar bone is likely due to continuous trauma on the painless healing granulation tissue giving rise to areas of mucosal necrosis and sequestrated superficial alveolus. Continuous traumatic contact between the upper and lower dentoalveolar region could have led to severe resorption of the maxillary and mandibular alveolar ridges which may be responsible for premature exposure of the mesiobuccal cusp tips of the left mandibular first permanent molar.
These children may be shown photographs of lip injury to educate them not to bite their own lips. However, these habits may perpetuate during sleep as part of a sleep disordered syndrome in these children. In such circumstances, soft vacuum dental splints or hard acrylic splints may be used to cap either mandibular or maxillary teeth or both in an attempt to break the lip and tongue biting habit. This is only possible when the deciduous molars have erupted and able to retain the splints. Littlewood and Hutton [
The poorly healing wound in the patient’s mouth was managed by using local measures that include wound debridement and mouth rinsing with chlorhexidine 0.12% solution. In this case provision of prostheses was not possible due to deficient tooth-tissue support, from severely resorbed upper and lower dentoalveolar ridges resulting from self-extractions. In addition, implant retained prostheses were not possible due to presence of unerupted teeth contraindicating implant placement.
Preventive measures such as custom fitted shoes, education regarding foot care, changing posture to relieve continuous pressure on bones and joints can prevent the need of multiple surgeries for injuries [
A multidisciplinary team approach comprising the neurologist, psychologist, family physician, and pediatric dentist from whom the child needs specialized care shall collectively provide the holistic care approach. In addition, we need to educate both the child and parents to ensure that the child is always in a safe environment.
The authors declare that there is no conflict of interests regarding the publication of this paper.
This paper has been read and approved by all authors, where the requirement of authorship as stated earlier has been met, and each author believes that the paper represents honest work.