Objective To investigate the feasibility of translocation of pedicled buccal fat pad in the treatment of the temporomandibular joint ankylosis(TMJA)by measuring the diameter of buccal fat pad and related anatomical structures of the transverse blood vessels,nerves and temporomandibular joint.Methods A total of 40 adult head and neck specimens were randomly divided into group A and group B,with 20 cases in each group.The morphology of the buccal fat pad in group A was observed,and its size and compression diameter through blood vessels and nerves were measured.The anatomical structures of the temporomandibular joint in group B were observed and measured.Results The volume of buccal fat pad in group A was(10.10±1.10)mL on the left side and(9.70±1.50)mL on the right side.The longitudinal axis length of buccal fat pad was(28.18±1.35)mm on the left side and(29.47±1.12)mm on the right side;Transverse axis length of buccal fat pad was(18.56±1.67)mm on the left side and(18.97±1.73)mm on the right side;There are facial artery,facial vein,maxillary artery branch,facial nerve buccal branch and so on through the buccal fat pad.In group B,the sagittal section of the temporomandibular joint disc presented S-type in 15 cases(75.0%),L-type in 3 cases(15.0%),and transitional type in 2 cases(10.0%).Anterior and posterior diameter of the articular disc was(14.42±1.94)mm on the left side and(15.34±1.37)mm on the right side;inside and outside diameter of the articular disc was(20.18±1.77)mm on the left side and(19.57±1.32)mm on the right side.Branches of maxillary artery and superficial temporal artery were respectively distributed within and outside the joint.Conclusion The pedicled buccal fat pad has a constant anatomical position,abundant blood supply,strong tissue repair,anti-infection ability and"buffer pad"function,which can reduce the formation of scar after surgery for TMJA,reduce the postoperative recurrence rate,and contribute to the recovery of joint function after surgery.

Objective To observe the course and diameter of facial artery branches and its adjacent structures in nasolabial groove area and the positional relationship,so as to provide reference for clinicians to carry out facial cosmetic repair surgery.Methods A total of 40 adult head and neck specimens were dissected on the spot,and the course and position of the facial artery branches,facial vein and facial nerve in the nasolabial groove area were observed,their diameters were measured,and relevant data were recorded.Results There were 4 types of facial artery branches in the nasolabial groove area:type Ⅰ(upper lip type)accounted for 12.5%,type Ⅱ(nasal type)accounted for 62.5%,type Ⅲ(classical type)accounted for 20.0%,and type Ⅳ(double severe type)accounted for 5.0% .There were 4 kinds of positional relationship between the facial artery and the facial vein in the nasolabial groove area:42.5% of the orofacial artery was located on the medial side of the facial vein,32.5% of the orofacial artery was located on the lateral side of the facial vein,17.5% of the two were close to and wrapped in a fascial sheath,7.5% of the orofacial artery and the main trunk of the facial vein were crossed,and the vein was located in the deep surface of the artery.There were 3 kinds of positional relationship between the facial artery and the marginal mandibular branch of the facial nerve:87.5% of the facial artery was deep on the marginal mandibular branch of the facial nerve,7.5% of the facial artery was superficial on the marginal mandibular branch of the facial nerve,and 5.0% of the facial artery was held or surrounded by two branches of the marginal mandibular branch of the facial nerve on the superficial or deep surface.Conclusion The positional relationship among facial artery,facial vein and facial nerve in the nasolabial groove area is complicated.Familiarity with its positional relationship can avoid damaging blood vessels and nerves during the nasorabial groove surgery,reduce surgical complications and improve surgical safety.