Introduction There are no established doctrines for treating Bells facial nerve paralysis (Bell's palsy), as there are still controversies in relation to the etiology of the disease. According to available sources 75% of all patients experience minor damage to the myelin sheath, thus usually recovering spontaneously and with no particular treatment. However, the rest of the patients may, without adequate treatment, experience a host of serious complications, starting from prolonged weakness of facial muscles, syncretism, hyperkinesias, contractions, even complete paralysis of facial muscles. All this may eventually lead to pronounced psychological problems. The initial therapy administered by maxillofacial surgeons is different from the one prescribed by neurologist, since maxillofacial surgeons recommend nerve blocks using 2% Xylocaine introduced in the stylomastoid area, accompanied by vitamin, anti-viral and non-corticosteroid anti-edema treatment.

Anatomically and functionally, temporomandibular joint (articulatio temporomandibularis) is specific, It consists of incongruent joint surface. The size of mandibular joint surface and its position in relation to facies articularis fossae mandibularis in different positions of mandibulae (central occlusion, central relation) are still subject to the interest of prosthetics. The aim of the research is measuring the lower joint surface by special 3D device that enables acribic precise measuring. Macerated human skulls, property of the Anatomy Institute, Faculty of Medicine, University Sarajevo, were used for the research that has been carried out. Results of measuring of articulating surface caput mandibulae along longer axis (mediolateral diameter) indicate that there are no differences in size of this surface between right and left joints. Results of measuring of articulating surface caput mandibulae along shorter axis (anteroposterior diameter) indicate differences in values of this diameter between right and left sides. Judging by statistical evaluation, differences are highly significant on the level of probability p<0.01. The research has shown differences in the size of this joint surface, on right and left sides, but only in antero-posterior direction. This original scientific work will help better of relationship of TMJ surfaces, what is necessary for treatment of TMD and occlusal imbalances.

The position of mandible in centric relation is the initial position in prosthodontic rehabilitation. This fact is especially significant today when, due to development of implantology, the use of osseointegrated prostheses is increasingly discussed. The aim of the study is to define if the peak of the articulating surface of mandible in centric relation position is directed towards the zenith of madibular fossa, or is in the retroposition. The research was conducted on macerated human sculls in anthropometric system, based on objective measuring techniques and methods. The results showed that if the zenith of mandibular fossa is determined according to the vertical line of the Frankfurt horizontal, the peak of the mandibular caput articulating surface is in retroposition. The relation of the lower joint surface to the mandibular fossa zenith is the same on both right and left side. The correlation coefficient demonstrates a high correlation between the sides, highly significant with probability level of p<0,01. If the peak of mandibular fossa is determined according to the vertical line of the Frankfurt horizontal, the peak of the articulating surface of mandibular caput is in retroposition in relation to the peak of the upper jaw surface. This original scientific work will help better understanding of x-ray analysis and understanding of relationship of TMJ surfaces, what is necessary for treatment of TMD and occlusal imbalances.