A retrospective cephalometric study of Class II Division 1 malocclusions was carried out. Sixty patients with complete overbites were compared with another group of 60 matched in every respect, with the exception of having incomplete overbites. All patients were in the permanent dentition stage and aged between 10 and 14 years. An incomplete overbite was related to vertical variation in the skeletal pattern. This was demonstrated by greater anterior lower facial height, greater gonial angle, and steeper mandibular plane inclination. Incisor alveolar heights and molar heights did not vary between the groups. No differences between groups were noted for the degree of overjet reduction achieved during treatment, or in post retention relapse of overbite and overjet.

Effects of certain therapeutic factors on facial development in isolated cleft palate. Roentgencephalometry was used during the investigation of the effects of some therapeutic factors on the growth and development of the jaws in 64 adult males with an isolated cleft palate repaired by pushback. The anterior growth of the maxilla was not related to the age at the time of surgery or to orthodontic therapy with removable appliances. A small number of individuals operated during adolescence had also a shorter depth of the maxilla similarly as patients operated upon during early childhood. Anterior crossbite developed mostly in patients with reduced proclination of the upper alveolar process, while, on the contrary, a retrusion of the maxilla played no essential part. This observation proves useful for the prediction of the development of this malocclusion. The angle of sagittal jaw relations does not represent necessarily a valid criterion of the development of the jaws. In the presence of an overbite retrusion of the maxilla is associated with a retroposition of the mandible and thus the angle of sagittal jaw relations remains unchanged.

SM, Kelleher KE, Elhady SN, Lindauer SJ (November 2019). "Does overbite reduction affect smile esthetics?". The Angle Orthodontist. 89 (6): 847–854. doi:10 In orthodontics, a malocclusion is a misalignment or incorrect relation between the teeth of the upper and lower dental arches when they approach each other as the jaws close. The English-language term dates from 1864; Edward Angle (1855 – 1930), the "father of modern orthodontics," popularised it. The word derives from mal- 'incorrect' and occlusion 'the manner in which opposing teeth meet'. Th A functional appliance that maintains the mandible in a postured position to influence both the orofacial musculature and dentoalveolar development prior to fixed appliance therapy. This is ideally done through pubertal growth in pre-adolescent children and the fixed appliance during permanent dentition. Different types of removable appliances include Activator, Bionator, Medium opening activator, Herbst, Frankel, and twin block appliance, with the twin block being the most widely used one. Growth modification through headgear to redirect maxillary growth. Orthodontic camouflage so that the jaw discrepancy is no longer apparent. Orthognathic surgery – sagittal split osteotomy mandibular advancement is carried out when growth is complete, where skeletal discrepancy is severe in anterior-posterior relationship or in the vertical direction. A fixed appliance is required before, during, and after surgery. Upper Removable Appliance – limited role in contemporary treatment of increased overjets. Mostly used for very mild Class II, overjet due to incisor proclination, and favourable overbite. Skeletal factors – the size, shape, and relative positions of the upper and lower jaws. Variations can be caused by environmental or behavioral factors such as a diet of soft, cooked food (as opposed to hard foods such as raw fruits and vegetables) in childhood, causing smaller jaws, muscles of mastication, nocturnal mouth breathing, and cleft lip and cleft palate. Muscle factors – the form and function of the muscles that surround the teeth. This can be affected by habits such as finger sucking, onychophagia (nail biting), dermatophagia (skin biting), pacifier use, and tongue thrusting. Dental factors – size of the teeth in relation to the jaw, early loss of teeth can result in spacing or mesial migration causing crowding, abnormal eruption path or timings, hyperdontia (extra teeth), or hypodontia (too few teeth). There is not one single cause of malocclusion, and in the planning of orthodontic treatment, it is often helpful to consider the above factors and the effect they have had on malocclusion. These can also be influenced by oral habits and pressure, resulting in malocclusion. Underdevelopment of the dentoalveolor tissue. Overdevelopment of bones around the mouth. Cleft lip and palate. Overcrowding of teeth. Abnormal development and growth of teeth. In secondary dentition, malocclusion is caused by: Degree of overlap: edge to edge, reduced, average, increased. Complete or incomplete: whether there is contact between the lower teeth and the opposing teeth/tissue (hard palate or gingivae) or not. Whether contact is traumatic or atraumatic. An average overbite is when the upper anterior teeth cover a third of the lower teeth. Covering less than this is described as 'reduced,' and more than this is an 'increased' overbite. No overlap or contact is considered an 'anterior open bite'. Class I (Neutrocclusion): Here, the molar relationship of the occlusion is normal but the incorrect line of occlusion or as described for the maxillary first molar, but the other teeth have problems like spacing, crowding, over or under eruption, etc. Class II (Distocclusion (retrognathism, overjet, overbite), In this situation, the mesiobuccal cusp of the upper first molar is not aligned with the mesiobuccal groove of the lower first molar. Instead it is anterior to it. Usually, the mesiobuccal cusp rests between the first mandibular molars and second premolars. There are two subtypes: Class II Division 1: The molar relationships are like those of Class II, and the anterior teeth are protruded. Class II Division 2: The molar relationships are Class II, but the central teeth are retroclined, and the lateral teeth are seen overlapping the centrals. Class III: (Mesiocclusion (prognathism, anterior crossbite, negative overjet, underbite)) In this case, the upper molars are placed not in the mesiobuccal groove but posteriorly to it. The mesiobuccal cusp of the maxillary first molar lies posterior to the mesiobuccal groove of the mandibular first molar. Usually seen when the lower front teeth are more prominent than the upper front teeth. In this case, the patient very often has a large mandible or a short maxillary bone. A functional appliance that maintains the mandible in a postured position to influence both the orofacial musculature and dentoalveolar development prior to fixed appliance therapy. This is ideally done through pubertal growth in pre-adolescent children and the fixed appliance during permanent dentition. Different types of removable appliances include Activator, Bionator, Medium opening activator, Herbst, Frankel, and twin block appliance, with the twin block being the most widely used one. Growth modification through headgear to redirect maxillary growth. Orthodontic camouflage so that the jaw discrepancy is no longer apparent. Orthognathic surgery – sagittal split osteotomy mandibular advancement is carried out when growth is complete, where skeletal discrepancy is severe in anterior-posterior relationship or in the vertical direction. A fixed appliance is required before, during, and after surgery. Upper Removable Appliance – limited role in contemporary treatment of increased overjets. Mostly used for very mild Class II, overjet due to incisor proclination, and favourable overbite.

Aim: To compare the impact of early orthodontic treatment to an untreated control group in order to assess how it affects pediatric patients’ craniofacial development and dental relationships. Methodology: Twelve children between the ages of 8 and 10 years participated in the intervention group and an untreated control group in this 36-month follow-up study. Both the baseline and final evaluations included thorough cephalometric, dental, and soft tissue evaluations. Result: Sagittal jaw relationships, maxillary transverse width, overjet and overbite reduction, facial convexity, and lip competence all significantly improved in the intervention group. There were not many changes in the control group. Significant intergroup differences were confirmed by statistical analysis (P < 0.05). Conclusion: By improving occlusal harmony, improving facial aesthetics, and positively influencing craniofacial growth, early orthodontic treatment during the mixed dentition stage may lessen the need for more involved future interventions. 1376 jpbs Journal of Pharmacy & Bioallied Sciences J Pharm Bioallied Sci Wolters Kluwer -- Medknow Publications PMC12995159 12995159 12995159 41853008 10.4103/jpbs.jpbs_1509_25 Evaluating the Impact of Early Orthodontic Intervention on Pediatric Craniofacial Development: A Longitudinal Study Kumar Vijender 1 ✉ Khan Danish U Z 2 Lakra Shweta N 3 Thomas Lincy R 4 Zarekar Mohit 5 Huda Najmul 6 Mehta Miral 7 1 Abstract Aim: To compare the impact of early orthodontic treatment to an untreated control group in order to assess how it affects pediatric patients’ craniofacial development and dental relationships. Methodology: Twelve children between the ages of 8 and 10 years participated in the intervention group and an untreated control group in this 36-month follow-up study. Both the baseline and final evaluations included thorough cephalometric, dental, and soft tissue evaluations. Result: Sagittal jaw relationships, maxillary transverse width, overjet and overbite reduction, facial convexity, and lip competence all significantly improved in the intervention group. K EYWORDS : Class II malocclusion , early orthodontic intervention , facial aesthetics , functional appliances , mandibular growth , occlusal harmony , orthopedic correction , pediatric craniofacial development , skeletal discrepancies , twin-block appliance , two-phase orthodontic treatment status released display-pdf no is-olf no is-manuscript no is-preprint no is-journal-matter no is-scanned no is-retracted no Received 2025 Aug 28; Revised 2025 Oct 1; Accepted 2025 Oct 5; Issue date 2026 Feb. I NTRODUCTION During the mixed dentition stage, when skeletal structures are highly adaptive and responsive to orthopedic forces, early orthodontic intervention is essential for directing favorable craniofacial development.[ 1 ] By starting treatment at this time, doctors can take advantage of the body’s natural growth potential to address disparities, stop malocclusions from getting worse, and improve both functional and aesthetic results.[ 2 ] By encouraging mandibular growth, enhancing occlusal harmony, and improving sagittal jaw relationships, the Twin-block is one of the functional appliances that has been extensively researched and shown to be successful in treating Class II malocclusions.[ 3 ] In addition to enhancing jaw alignment, these interventions help achieve balanced facial proportions and profile aesthetics, both of which can have long-lasting psychosocial advantages. Other functional appliances, such as the Herbst and Bionator, which also promote mandibular advancement and address maxillomandibular discrepancies, have shown comparable outcomes.[ 4 ] M ETHODOLOGY This longitudinal study assessed the effects of early orthodontic intervention on craniofacial development in 12 children aged 6–9 years with developing malocclusions, including Class II and transverse discrepancies. Inclusion criteria were mixed dentition, no prior orthodontic treatment, and absence of systemic or craniofacial syndromes. Baseline records included photographs, dental casts, radiographs, and cephalograms. After 36 months, the intervention group demonstrated notable improvements in sagittal jaw relationships, with a mean reduction in ANB angle of 2.1° ± 0.4, compared with a minimal change of 0.3° ± 0.2 in the control group. Maxillary transverse width increased by an average of 3.4 mm ± 0.5 in the intervention group, while the control group exhibited only a 0.8 mm ± 0.3 increase. Overjet and overbite were significantly reduced in the intervention group by 2.5 mm ± 0.4 and 1.8 mm ± 0.3 respectively, whereas changes in the control group were minimal. Soft tissue profile assessment showed an improvement in facial convexity and lip competence among treated subjects. Table 1 Comparative cephalometric and dental changes between intervention and control groups over 36 months Parameter Intervention Group (Mean±SD) Control Group (Mean±SD) P ANB Angle Change (°) −2.1±0.4 −0.3±0.2 <0.001 Maxillary Transverse Width (mm) +3.4±0.5 +0.8±0.3 <0.001 Overjet Reduction (mm) −2.5±0.4 −0.4±0.2 <0.001 Overbite Reduction (mm) −1.8±0.3 −0.3±0.2 <0.001 Facial Convexity Improvement (°) +1.6±0.3 +0.2±0.1 <0.001 Lip Competence (qualitative) Improved in 83% Improved in 17% <0.01 The results indicate that early orthodontic intervention in the mixed dentition stage can produce significant skeletal and dental changes, particularly in sagittal and transverse dimensions, with concurrent improvements in soft tissue profile when compared with untreated controls. D ISCUSSION Prolonged early oral habits are a significant etiological factor in the development and progression of malocclusions, according to the results of this longitudinal pediatric–orthodontic study. The study cohort’s prevalence of malocclusion increased from 37.7% to 48.2% during the 2-year follow-up period, with anterior open bite and posterior crossbite being the most common presentations.

[The functional regulator (FR II)]. The Frankel II appliance which is used in Angle Class II Division 2 cases, establish sagittal, vertical and transversal development of the jaws by keeping away the perioral muscles as in the other functional regulators. The difference between FR II and FR I appliances is the design of canine wires. After 8 months of FR II treatment of the 11 year old Class II Div. 2 patient with 5 mm. overbite, as the overbite decreased by 3 mm., the FMA angle increased and a transversal and sagittal development was established in both upper and lower jaws. Published in Turk ortodonti dergisi : Ortodonti Derneg'nin resmi yayin organidir = Turkish journal of orthodontics (1990)