An investigation of the association between overjet size, lip coverage, and traumatic injury to maxillary incisors

Abstract

This study investigated the association between overjet size and lip coverage when assessing the likelihood of traumatic injury to maxillary incisors. Eleven-hundred-and-thirty-seven 11- and 12-year-olds were examined in school for traumatic injury to their maxillary incisors. The size of overjet and the adequacy of lip coverage of the maxillary incisors was assessed for each child. One-hundred-and-sixty-seven (15 per cent) had experienced traumatic injury to their maxillary incisors. Both increased overjet and inadequate lip coverage of the maxillary incisors were found to be significant risk factors. However, inadequate lip coverage was the single most important independent predictor of traumatic injury (P < 0.001), with a relative odds ratio of 2.62. The results suggest that much of the predictive value of increased overjet may be explained by inadequate lip coverage.

Predisposing Factors for Traumatic Dental Injury in Primary Teeth and Seeking of Post-trauma Care

“…For such, each child received a kit containing a toothbrush, toothpaste and dental floss to remove bacterial biofilm from the dental surfaces and facilitate the diagnosis. A clinical chart was used to record whether lip seal was adequate or inadequate, with the facial muscles at rest when the child was unaware that he/she was being observed (10).…”

Pulp Vitality in Teeth Suffering Trauma during Orthodontic Therapy

“…[1][2][3][4][5] The vast majority of dental injuries involve the upper incisors, and Class II division 1 malocclusion with increased overjet and inadequate lip coverage have been identified as possible predisposing factors. [6][7][8][9][10][11][12][13] Because these predisposing factors are frequent findings in patients with an orthodontic treatment need, a high prevalence of traumatized permanent incisors is found in candidates for orthodontic therapy. 12,13 Therefore, orthodontic movement of previously traumatized teeth represents a major problem in routine orthodontic treatment.…”

Orthodontic referral behaviour of West Sussex dentists

“…If the IOTN is to be used successfully as a tool by referring dentists, considerable resources need to be directed at training. 15 Burden et al 15 reported on the trial of an IOTN learning package developed for use by dentists. The trial led to a reduction in the proportion of patients referred for treatment with mild malocclusions and helped dentists to identify cases where a borderline decision existed.…”

“…The trial led to a reduction in the proportion of patients referred for treatment with mild malocclusions and helped dentists to identify cases where a borderline decision existed. 15 The development of locally produced referral guidelines outlining when and where to make orthodontic referrals might help dentists make the best use of the available orthodontic manpower. This could be addressed by funding IOTN learning packages for individual practices or providing training courses.…”