Scissor jaw, also known as scissor bite, refers to a specific misalignment of the teeth. It occurs when the upper (maxillary) posterior teeth are positioned buccally (towards the cheek) relative to the lower (mandibular) teeth.
Understanding Scissor Bite
According to the provided reference, a more detailed explanation of scissor bite is as follows:
- Definition: Scissor bite is defined as a buccal displacement of the maxillary posterior teeth. This means the upper back teeth are positioned further outwards (towards the cheek) than the lower back teeth.
- Tooth Contact: This displacement may or may not involve contact between the lingual surface (tongue side) of the upper tooth's lingual cusp (point) and the buccal surface (cheek side) of the lower antagonist's buccal cusp. In simpler terms, sometimes the teeth might touch in a misaligned way, and other times, they might not due to the displacement.
Key Characteristics of Scissor Jaw
Here’s a breakdown of what to look for in a scissor jaw:
- Outward Displacement: The most significant feature is the upper teeth being positioned further out towards the cheeks compared to their normal alignment with the lower teeth.
- Potential Contact Issues: There can be varying degrees of contact between the upper and lower teeth in a scissor bite. Sometimes, there is no contact. Other times, there is an abnormal contact between the cusps of the teeth.
- Location: This misalignment typically occurs in the back teeth (posterior teeth).
- Impact: Scissor bite may potentially lead to functional issues, such as difficulty in chewing, temporomandibular joint (TMJ) problems, and abnormal tooth wear.
Why Does Scissor Jaw Occur?
Several factors may contribute to scissor bite, including:
- Genetics: Sometimes, it is inherited.
- Environmental Factors: Habits such as thumb sucking and tongue thrusting may contribute to scissor bite.
- Dental Issues: Missing or extra teeth, or delayed shedding of primary teeth may also cause a scissor bite.
Treatment Options
Treatment for scissor bite typically involves:
- Orthodontics: Braces or clear aligners are often used to move the teeth into the correct alignment.
- Interceptive Orthodontics: In children, early intervention can prevent scissor bite from developing more severe issues.
- Jaw Surgery: In some severe cases, jaw surgery might be needed to correct the skeletal relationship of the maxilla and the mandible.
Practical Insight
If you suspect you or your child has a scissor bite, it is essential to consult with a dentist or orthodontist. They can diagnose the condition accurately and recommend the appropriate treatment plan. Early diagnosis and intervention may prevent significant complications and improve overall oral health.
