Study of the relationship between overjet development and some skull bone measurements in Warmblood foals.
Authors: Domanska-Kruppa Natalia, Venner Monica, Bienert-Zeit Astrid
Journal: The Veterinary record
Summary
# Editorial Summary: Overjet Development and Skull Growth in Warmblood Foals Determining whether overjet—the anterior projection of maxillary incisors beyond their mandibular counterparts—results from maxillary lengthening or mandibular shortening has remained unclear in equine dentistry, despite the condition's implications for occlusal wear patterns and aesthetic concerns. Domanska-Kruppa and colleagues developed a standardised measurement protocol to assess five key skull bone dimensions in 650 Warmblood foals at two weeks of age and again during their first year, tracking changes in incisor positioning over this critical growth period. Among the 2 per cent prevalence of overjet cases identified at two weeks, nine of thirteen foals (69 per cent) showed spontaneous resolution, whilst four foals without initial overjet developed the condition during the subsequent months, highlighting the dynamic nature of occlusal development in young stock. This longitudinal approach successfully quantified how differential growth rates of cranial and mandibular structures influence incisor relationships, providing practitioners and breeders with evidence that early overjet detection may not necessitate intervention in many cases. The methodology offers farriers, veterinarians and breed societies a reliable framework for monitoring malocclusion trajectories in foals and distinguishing self-correcting presentations from those requiring management.
Read the full abstract on PubMed
Practical Takeaways
- •Most foals presenting with overjet in early life (69%) spontaneously resolve the condition without intervention, so watchful waiting may be appropriate rather than immediate treatment
- •Overjet can develop later in the first year in some foals initially presenting as normal, warranting periodic reassessment during this critical growth period
- •Quantitative skull bone measurement techniques are now available to objectively assess overjet progression and help distinguish whether maxillary lengthening or mandibular shortening is the primary driver
Key Findings
- •Overjet prevalence was 2% in 650 Warmblood foals examined at two weeks of age
- •Nine of 13 foals (69%) with measurable overjet at the start of the study resolved spontaneously during the first year of life
- •Four foals with no evidence of overjet at birth developed the condition during their first year
- •Longitudinal skull bone measurements effectively tracked changes in overjet presence and degree over time in foals