Class 111 molar relationship


class 111 molar relationship

The case was finished in a Class III molar and a Class I canine relationship. The results were stable in 3 years follow-up. Keywords: Class II. Class III molar relationship is associated with vertical or lingually tipped mandibular incisors and a usually concave profile. These characteristics seriously affect. Angle Class III malocclusion is characterized by anteroposterior dental and facial discrep- ancies usually .. the goals were achieved, i.e. the molar relation-.

class 111 molar relationship

There is alignment of the teeth, normal overbite and overjet and coincident maxillary and mandibular midlines. The mesiobuccal cusp of the maxillary first permanent molar occludes with the mesiobuccal groove of the mandibular first permanent molar.

The distal incline of the maxillary canine occludes with the mesial incline of the mandibular first premolar. The molar relationship shows the mesiobuccal groove of the mandibular first molar is DISTALLY posteriorly positioned when in occlusion with the mesiobuccal cusp of the maxillary first molar. Usually the mesiobuccal cusp of maxillary first molar rests in between the first mandibular molar and second premolar.

The molar relationships are like that of Class II and the maxillary anterior teeth are protruded. Teeth are proclaimed and a large overjet is present. The molar relationships are Class II where the maxillary central incisors are retroclined. The maxillary lateral incisor teeth may be proclaimed or normally inclined.

Retroclined and a deep overbite exists. She had a Class II skeletal pattern due to increased maxillary length and decreased mandibular length for that maxilla.

Malocclusion - Wikipedia

The use of high pull headgear helped to restrict the further growth of maxilla and to maintain the vertical proportions. The distalization was due to the distal force of the head gear g and the open coil spring which was placed between lateral and first premolar. Both produced opposite moments which cancelled each other leading to bodily distalization of upper left molar [Figure 9].

class 111 molar relationship

The light force g given on the right side was not sufficient for further distalization of the right first molar. The fixed functional appliance encouraged mandibular advancement finishing the case in a Class I canine and a Class III molar relationship.

Force vector analysis depicted for the headgear enabling unilateral distalization, sagittal and vertical control Click here to view A high pull headgear restricts the horizontal and vertical growth of maxilla along with distalization and intrusion of the maxillary molars. Headgear was also used for unilateral distalization of Class II side by varied forces.

Posttreatment cephalometric assessment showed the catch-up growth of mandible. Mandible was increased in length by 4 mm, but the maxillary length remained the same. In the study of Franchi et al. In our patient also we were able to notice moderate dentoalveolar changes, but the combination of headgear had resulted in improved skeletal effects.

The posttreatment lower incisor inclination values showed that they were controlled from unwanted proclination.

class 111 molar relationship

Thus, a Class I skeletal pattern was achieved in this case mainly due to dentoalveolar changes, favorable mandibular growth and maxillary restraint as a consequences of these growth modulation appliances. A Class III molar finish is a viable option, but the somewhat awkward intercuspation of the mandibular first molar with two maxillary premolars and the fear of long-term stability make the orthodontist cautious about this option.

Modified Angle's Classification for Primary Dentition

In addition, Bakke [13] ascribes the occlusal force more to the number and quality of occlusal contacts than to the sagittal relationship between the posterior teeth.

Based on his clinical examples and related literature, he concluded that Class III molar finish is a viable option provided proper diagnosis and treatment planning is done.

CC363. AJODO-Diagnosis and Conservative Treatment of Skeletal Class III 149 (2016)

A 2 years follow-up in our patient showed that the Class III molar finish was stable without any signs of relapse.